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 LTTNG_HIDDEN
const char * const config_element_discarded_events
= "discarded_events";
99 LTTNG_HIDDEN
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 LTTNG_HIDDEN
const char * const config_element_context_perf
= "perf";
105 LTTNG_HIDDEN
const char * const config_element_context_app
= "app";
106 LTTNG_HIDDEN
const char * const config_element_context_app_provider_name
= "provider_name";
107 LTTNG_HIDDEN
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 LTTNG_HIDDEN
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 LTTNG_HIDDEN
const char * const config_event_context_app
= "APP";
175 LTTNG_HIDDEN
const char * const config_event_context_interruptible
= "INTERRUPTIBLE";
176 LTTNG_HIDDEN
const char * const config_event_context_preemptible
= "PREEMPTIBLE";
177 LTTNG_HIDDEN
const char * const config_event_context_need_reschedule
= "NEED_RESCHEDULE";
178 LTTNG_HIDDEN
const char * const config_event_context_migratable
= "MIGRATABLE";
180 struct consumer_output
{
187 static int config_entry_handler_filter(struct handler_filter_args
*args
,
188 const char *section
, const char *name
, const char *value
)
191 struct config_entry entry
= { section
, name
, value
};
195 if (!section
|| !name
|| !value
) {
201 if (strcmp(args
->section
, section
)) {
206 ret
= args
->handler(&entry
, args
->user_data
);
212 int config_get_section_entries(const char *override_path
, const char *section
,
213 config_entry_handler_cb handler
, void *user_data
)
217 FILE *config_file
= NULL
;
218 struct handler_filter_args filter
= { section
, handler
, user_data
};
220 /* First, try system-wide conf. file. */
221 path
= DEFAULT_DAEMON_SYSTEM_CONFIGPATH
;
223 config_file
= fopen(path
, "r");
225 DBG("Loading daemon conf file at %s", path
);
227 * Return value is not very important here since error or not, we
228 * continue and try the next possible conf. file.
230 (void) ini_parse_file(config_file
,
231 (ini_entry_handler
) config_entry_handler_filter
,
236 /* Second is the user local configuration. */
237 path
= utils_get_home_dir();
239 char fullpath
[PATH_MAX
];
241 ret
= snprintf(fullpath
, sizeof(fullpath
),
242 DEFAULT_DAEMON_HOME_CONFIGPATH
, path
);
244 PERROR("snprintf user conf. path");
248 config_file
= fopen(fullpath
, "r");
250 DBG("Loading daemon user conf file at %s", path
);
252 * Return value is not very important here since error or not, we
253 * continue and try the next possible conf. file.
255 (void) ini_parse_file(config_file
,
256 (ini_entry_handler
) config_entry_handler_filter
,
262 /* Final path is the one that the user might have provided. */
264 config_file
= fopen(override_path
, "r");
266 DBG("Loading daemon command line conf file at %s", override_path
);
267 (void) ini_parse_file(config_file
,
268 (ini_entry_handler
) config_entry_handler_filter
,
272 ERR("Failed to open daemon configuration file at %s",
279 /* Everything went well. */
287 int config_parse_value(const char *value
)
290 char *endptr
, *lower_str
;
300 v
= strtoul(value
, &endptr
, 10);
301 if (endptr
!= value
) {
306 lower_str
= zmalloc(len
+ 1);
313 for (i
= 0; i
< len
; i
++) {
314 lower_str
[i
] = tolower(value
[i
]);
317 if (!strcmp(lower_str
, config_str_yes
) ||
318 !strcmp(lower_str
, config_str_true
) ||
319 !strcmp(lower_str
, config_str_on
)) {
321 } else if (!strcmp(lower_str
, config_str_no
) ||
322 !strcmp(lower_str
, config_str_false
) ||
323 !strcmp(lower_str
, config_str_off
)) {
335 * Returns a xmlChar string which must be released using xmlFree().
337 static xmlChar
*encode_string(const char *in_str
)
339 xmlChar
*out_str
= NULL
;
340 xmlCharEncodingHandlerPtr handler
;
341 int out_len
, ret
, in_len
;
345 handler
= xmlFindCharEncodingHandler(config_xml_encoding
);
347 ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!");
351 in_len
= strlen(in_str
);
353 * Add 1 byte for the NULL terminted character. The factor 4 here is
354 * used because UTF-8 characters can take up to 4 bytes.
356 out_len
= (in_len
* 4) + 1;
357 out_str
= xmlMalloc(out_len
);
362 ret
= handler
->input(out_str
, &out_len
, (const xmlChar
*) in_str
, &in_len
);
369 /* out_len is now the size of out_str */
370 out_str
[out_len
] = '\0';
376 struct config_writer
*config_writer_create(int fd_output
, int indent
)
379 struct config_writer
*writer
;
380 xmlOutputBufferPtr buffer
;
382 writer
= zmalloc(sizeof(struct config_writer
));
384 PERROR("zmalloc config_writer_create");
388 buffer
= xmlOutputBufferCreateFd(fd_output
, NULL
);
393 writer
->writer
= xmlNewTextWriter(buffer
);
394 ret
= xmlTextWriterStartDocument(writer
->writer
, NULL
,
395 config_xml_encoding
, NULL
);
400 ret
= xmlTextWriterSetIndentString(writer
->writer
,
401 BAD_CAST config_xml_indent_string
);
406 ret
= xmlTextWriterSetIndent(writer
->writer
, indent
);
414 config_writer_destroy(writer
);
419 int config_writer_destroy(struct config_writer
*writer
)
428 if (xmlTextWriterEndDocument(writer
->writer
) < 0) {
429 WARN("Could not close XML document");
433 if (writer
->writer
) {
434 xmlFreeTextWriter(writer
->writer
);
443 int config_writer_open_element(struct config_writer
*writer
,
444 const char *element_name
)
447 xmlChar
*encoded_element_name
;
449 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
454 encoded_element_name
= encode_string(element_name
);
455 if (!encoded_element_name
) {
460 ret
= xmlTextWriterStartElement(writer
->writer
, encoded_element_name
);
461 xmlFree(encoded_element_name
);
463 return ret
>= 0 ? 0 : ret
;
467 int config_writer_write_attribute(struct config_writer
*writer
,
468 const char *name
, const char *value
)
471 xmlChar
*encoded_name
= NULL
;
472 xmlChar
*encoded_value
= NULL
;
474 if (!writer
|| !writer
->writer
|| !name
|| !name
[0]) {
479 encoded_name
= encode_string(name
);
485 encoded_value
= encode_string(value
);
486 if (!encoded_value
) {
491 ret
= xmlTextWriterWriteAttribute(writer
->writer
, encoded_name
,
494 xmlFree(encoded_name
);
495 xmlFree(encoded_value
);
496 return ret
>= 0 ? 0 : ret
;
500 int config_writer_close_element(struct config_writer
*writer
)
504 if (!writer
|| !writer
->writer
) {
509 ret
= xmlTextWriterEndElement(writer
->writer
);
511 return ret
>= 0 ? 0 : ret
;
515 int config_writer_write_element_unsigned_int(struct config_writer
*writer
,
516 const char *element_name
, uint64_t value
)
519 xmlChar
*encoded_element_name
;
521 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
526 encoded_element_name
= encode_string(element_name
);
527 if (!encoded_element_name
) {
532 ret
= xmlTextWriterWriteFormatElement(writer
->writer
,
533 encoded_element_name
, "%" PRIu64
, value
);
534 xmlFree(encoded_element_name
);
536 return ret
>= 0 ? 0 : ret
;
540 int config_writer_write_element_signed_int(struct config_writer
*writer
,
541 const char *element_name
, int64_t value
)
544 xmlChar
*encoded_element_name
;
546 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
551 encoded_element_name
= encode_string(element_name
);
552 if (!encoded_element_name
) {
557 ret
= xmlTextWriterWriteFormatElement(writer
->writer
,
558 encoded_element_name
, "%" PRIi64
, value
);
559 xmlFree(encoded_element_name
);
561 return ret
>= 0 ? 0 : ret
;
565 int config_writer_write_element_bool(struct config_writer
*writer
,
566 const char *element_name
, int value
)
568 return config_writer_write_element_string(writer
, element_name
,
569 value
? config_xml_true
: config_xml_false
);
573 int config_writer_write_element_string(struct config_writer
*writer
,
574 const char *element_name
, const char *value
)
577 xmlChar
*encoded_element_name
= NULL
;
578 xmlChar
*encoded_value
= NULL
;
580 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0] ||
586 encoded_element_name
= encode_string(element_name
);
587 if (!encoded_element_name
) {
592 encoded_value
= encode_string(value
);
593 if (!encoded_value
) {
598 ret
= xmlTextWriterWriteElement(writer
->writer
, encoded_element_name
,
601 xmlFree(encoded_element_name
);
602 xmlFree(encoded_value
);
603 return ret
>= 0 ? 0 : ret
;
607 void xml_error_handler(void *ctx
, const char *format
, ...)
613 va_start(args
, format
);
614 ret
= vasprintf(&errMsg
, format
, args
);
617 ERR("String allocation failed in xml error handler");
621 fprintf(stderr
, "XML Error: %s", errMsg
);
626 void fini_session_config_validation_ctx(
627 struct session_config_validation_ctx
*ctx
)
629 if (ctx
->parser_ctx
) {
630 xmlSchemaFreeParserCtxt(ctx
->parser_ctx
);
634 xmlSchemaFree(ctx
->schema
);
637 if (ctx
->schema_validation_ctx
) {
638 xmlSchemaFreeValidCtxt(ctx
->schema_validation_ctx
);
641 memset(ctx
, 0, sizeof(struct session_config_validation_ctx
));
645 char *get_session_config_xsd_path()
648 const char *base_path
= lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV
);
649 size_t base_path_len
;
653 base_path
= DEFAULT_SESSION_CONFIG_XSD_PATH
;
656 base_path_len
= strlen(base_path
);
657 max_path_len
= base_path_len
+
658 sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME
) + 1;
659 xsd_path
= zmalloc(max_path_len
);
664 strncpy(xsd_path
, base_path
, max_path_len
);
665 if (xsd_path
[base_path_len
- 1] != '/') {
666 xsd_path
[base_path_len
++] = '/';
669 strncpy(xsd_path
+ base_path_len
, DEFAULT_SESSION_CONFIG_XSD_FILENAME
,
670 max_path_len
- base_path_len
);
676 int init_session_config_validation_ctx(
677 struct session_config_validation_ctx
*ctx
)
680 char *xsd_path
= get_session_config_xsd_path();
683 ret
= -LTTNG_ERR_NOMEM
;
687 ctx
->parser_ctx
= xmlSchemaNewParserCtxt(xsd_path
);
688 if (!ctx
->parser_ctx
) {
689 ERR("XSD parser context creation failed");
690 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
693 xmlSchemaSetParserErrors(ctx
->parser_ctx
, xml_error_handler
,
694 xml_error_handler
, NULL
);
696 ctx
->schema
= xmlSchemaParse(ctx
->parser_ctx
);
698 ERR("XSD parsing failed");
699 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
703 ctx
->schema_validation_ctx
= xmlSchemaNewValidCtxt(ctx
->schema
);
704 if (!ctx
->schema_validation_ctx
) {
705 ERR("XSD validation context creation failed");
706 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
710 xmlSchemaSetValidErrors(ctx
->schema_validation_ctx
, xml_error_handler
,
711 xml_error_handler
, NULL
);
716 fini_session_config_validation_ctx(ctx
);
724 int parse_uint(xmlChar
*str
, uint64_t *val
)
734 *val
= strtoull((const char *) str
, &endptr
, 10);
735 if (!endptr
|| *endptr
) {
746 int parse_int(xmlChar
*str
, int64_t *val
)
756 *val
= strtoll((const char *) str
, &endptr
, 10);
757 if (!endptr
|| *endptr
) {
768 int parse_bool(xmlChar
*str
, int *val
)
777 if (!strcmp((const char *) str
, config_xml_true
)) {
779 } else if (!strcmp((const char *) str
, config_xml_false
)) {
782 WARN("Invalid boolean value encoutered (%s).",
791 int get_domain_type(xmlChar
*domain
)
799 if (!strcmp((char *) domain
, config_domain_type_kernel
)) {
800 ret
= LTTNG_DOMAIN_KERNEL
;
801 } else if (!strcmp((char *) domain
, config_domain_type_ust
)) {
802 ret
= LTTNG_DOMAIN_UST
;
803 } else if (!strcmp((char *) domain
, config_domain_type_jul
)) {
804 ret
= LTTNG_DOMAIN_JUL
;
805 } else if (!strcmp((char *) domain
, config_domain_type_log4j
)) {
806 ret
= LTTNG_DOMAIN_LOG4J
;
807 } else if (!strcmp((char *) domain
, config_domain_type_python
)) {
808 ret
= LTTNG_DOMAIN_PYTHON
;
819 int get_buffer_type(xmlChar
*buffer_type
)
827 if (!strcmp((char *) buffer_type
, config_buffer_type_global
)) {
828 ret
= LTTNG_BUFFER_GLOBAL
;
829 } else if (!strcmp((char *) buffer_type
, config_buffer_type_per_uid
)) {
830 ret
= LTTNG_BUFFER_PER_UID
;
831 } else if (!strcmp((char *) buffer_type
, config_buffer_type_per_pid
)) {
832 ret
= LTTNG_BUFFER_PER_PID
;
843 int get_overwrite_mode(xmlChar
*overwrite_mode
)
847 if (!overwrite_mode
) {
851 if (!strcmp((char *) overwrite_mode
, config_overwrite_mode_overwrite
)) {
853 } else if (!strcmp((char *) overwrite_mode
,
854 config_overwrite_mode_discard
)) {
866 int get_output_type(xmlChar
*output_type
)
874 if (!strcmp((char *) output_type
, config_output_type_mmap
)) {
875 ret
= LTTNG_EVENT_MMAP
;
876 } else if (!strcmp((char *) output_type
, config_output_type_splice
)) {
877 ret
= LTTNG_EVENT_SPLICE
;
888 int get_event_type(xmlChar
*event_type
)
896 if (!strcmp((char *) event_type
, config_event_type_all
)) {
897 ret
= LTTNG_EVENT_ALL
;
898 } else if (!strcmp((char *) event_type
, config_event_type_tracepoint
)) {
899 ret
= LTTNG_EVENT_TRACEPOINT
;
900 } else if (!strcmp((char *) event_type
, config_event_type_probe
)) {
901 ret
= LTTNG_EVENT_PROBE
;
902 } else if (!strcmp((char *) event_type
, config_event_type_function
)) {
903 ret
= LTTNG_EVENT_FUNCTION
;
904 } else if (!strcmp((char *) event_type
,
905 config_event_type_function_entry
)) {
906 ret
= LTTNG_EVENT_FUNCTION_ENTRY
;
907 } else if (!strcmp((char *) event_type
, config_event_type_noop
)) {
908 ret
= LTTNG_EVENT_NOOP
;
909 } else if (!strcmp((char *) event_type
, config_event_type_syscall
)) {
910 ret
= LTTNG_EVENT_SYSCALL
;
921 int get_loglevel_type(xmlChar
*loglevel_type
)
925 if (!loglevel_type
) {
929 if (!strcmp((char *) loglevel_type
, config_loglevel_type_all
)) {
930 ret
= LTTNG_EVENT_LOGLEVEL_ALL
;
931 } else if (!strcmp((char *) loglevel_type
,
932 config_loglevel_type_range
)) {
933 ret
= LTTNG_EVENT_LOGLEVEL_RANGE
;
934 } else if (!strcmp((char *) loglevel_type
,
935 config_loglevel_type_single
)) {
936 ret
= LTTNG_EVENT_LOGLEVEL_SINGLE
;
947 * Return the context type or -1 on error.
950 int get_context_type(xmlChar
*context_type
)
958 if (!strcmp((char *) context_type
, config_event_context_pid
)) {
959 ret
= LTTNG_EVENT_CONTEXT_PID
;
960 } else if (!strcmp((char *) context_type
,
961 config_event_context_procname
)) {
962 ret
= LTTNG_EVENT_CONTEXT_PROCNAME
;
963 } else if (!strcmp((char *) context_type
,
964 config_event_context_prio
)) {
965 ret
= LTTNG_EVENT_CONTEXT_PRIO
;
966 } else if (!strcmp((char *) context_type
,
967 config_event_context_nice
)) {
968 ret
= LTTNG_EVENT_CONTEXT_NICE
;
969 } else if (!strcmp((char *) context_type
,
970 config_event_context_vpid
)) {
971 ret
= LTTNG_EVENT_CONTEXT_VPID
;
972 } else if (!strcmp((char *) context_type
,
973 config_event_context_tid
)) {
974 ret
= LTTNG_EVENT_CONTEXT_TID
;
975 } else if (!strcmp((char *) context_type
,
976 config_event_context_vtid
)) {
977 ret
= LTTNG_EVENT_CONTEXT_VTID
;
978 } else if (!strcmp((char *) context_type
,
979 config_event_context_ppid
)) {
980 ret
= LTTNG_EVENT_CONTEXT_PPID
;
981 } else if (!strcmp((char *) context_type
,
982 config_event_context_vppid
)) {
983 ret
= LTTNG_EVENT_CONTEXT_VPPID
;
984 } else if (!strcmp((char *) context_type
,
985 config_event_context_pthread_id
)) {
986 ret
= LTTNG_EVENT_CONTEXT_PTHREAD_ID
;
987 } else if (!strcmp((char *) context_type
,
988 config_event_context_hostname
)) {
989 ret
= LTTNG_EVENT_CONTEXT_HOSTNAME
;
990 } else if (!strcmp((char *) context_type
,
991 config_event_context_ip
)) {
992 ret
= LTTNG_EVENT_CONTEXT_IP
;
993 } else if (!strcmp((char *) context_type
,
994 config_event_context_interruptible
)) {
995 ret
= LTTNG_EVENT_CONTEXT_INTERRUPTIBLE
;
996 } else if (!strcmp((char *) context_type
,
997 config_event_context_preemptible
)) {
998 ret
= LTTNG_EVENT_CONTEXT_PREEMPTIBLE
;
999 } else if (!strcmp((char *) context_type
,
1000 config_event_context_need_reschedule
)) {
1001 ret
= LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE
;
1002 } else if (!strcmp((char *) context_type
,
1003 config_event_context_migratable
)) {
1004 ret
= LTTNG_EVENT_CONTEXT_MIGRATABLE
;
1015 int init_domain(xmlNodePtr domain_node
, struct lttng_domain
*domain
)
1020 for (node
= xmlFirstElementChild(domain_node
); node
;
1021 node
= xmlNextElementSibling(node
)) {
1022 if (!strcmp((const char *) node
->name
, config_element_type
)) {
1024 xmlChar
*node_content
= xmlNodeGetContent(node
);
1025 if (!node_content
) {
1026 ret
= -LTTNG_ERR_NOMEM
;
1030 ret
= get_domain_type(node_content
);
1033 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1038 } else if (!strcmp((const char *) node
->name
,
1039 config_element_buffer_type
)) {
1041 xmlChar
*node_content
= xmlNodeGetContent(node
);
1042 if (!node_content
) {
1043 ret
= -LTTNG_ERR_NOMEM
;
1047 ret
= get_buffer_type(node_content
);
1050 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1054 domain
->buf_type
= ret
;
1063 int get_net_output_uris(xmlNodePtr net_output_node
, char **control_uri
,
1068 for (node
= xmlFirstElementChild(net_output_node
); node
;
1069 node
= xmlNextElementSibling(node
)) {
1070 if (!strcmp((const char *) node
->name
, config_element_control_uri
)) {
1072 *control_uri
= (char *) xmlNodeGetContent(node
);
1073 if (!*control_uri
) {
1078 *data_uri
= (char *) xmlNodeGetContent(node
);
1085 return *control_uri
|| *data_uri
? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1089 int process_consumer_output(xmlNodePtr consumer_output_node
,
1090 struct consumer_output
*output
)
1097 for (node
= xmlFirstElementChild(consumer_output_node
); node
;
1098 node
= xmlNextElementSibling(node
)) {
1099 if (!strcmp((const char *) node
->name
, config_element_enabled
)) {
1100 xmlChar
*enabled_str
= xmlNodeGetContent(node
);
1104 ret
= -LTTNG_ERR_NOMEM
;
1108 ret
= parse_bool(enabled_str
, &output
->enabled
);
1114 xmlNodePtr output_type_node
;
1117 output_type_node
= xmlFirstElementChild(node
);
1118 if (!output_type_node
) {
1119 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1123 if (!strcmp((const char *) output_type_node
->name
,
1124 config_element_path
)) {
1126 output
->path
= (char *) xmlNodeGetContent(output_type_node
);
1127 if (!output
->path
) {
1128 ret
= -LTTNG_ERR_NOMEM
;
1133 ret
= get_net_output_uris(output_type_node
,
1134 &output
->control_uri
, &output
->data_uri
);
1146 free(output
->control_uri
);
1147 free(output
->data_uri
);
1148 memset(output
, 0, sizeof(struct consumer_output
));
1154 int create_session_net_output(const char *name
, struct lttng_domain
*domain
,
1155 const char *control_uri
, const char *data_uri
)
1158 struct lttng_handle
*handle
;
1159 const char *uri
= NULL
;
1164 handle
= lttng_create_handle(name
, domain
);
1166 ret
= -LTTNG_ERR_NOMEM
;
1170 if (!control_uri
|| !data_uri
) {
1171 uri
= control_uri
? control_uri
: data_uri
;
1176 ret
= lttng_set_consumer_url(handle
, control_uri
, data_uri
);
1177 lttng_destroy_handle(handle
);
1183 int create_snapshot_session(const char *session_name
, xmlNodePtr output_node
)
1186 xmlNodePtr node
= NULL
;
1187 xmlNodePtr snapshot_output_list_node
;
1188 xmlNodePtr snapshot_output_node
;
1190 assert(session_name
);
1192 ret
= lttng_create_session_snapshot(session_name
, NULL
);
1201 snapshot_output_list_node
= xmlFirstElementChild(output_node
);
1203 /* Parse and create snapshot outputs */
1205 for (snapshot_output_node
=
1206 xmlFirstElementChild(snapshot_output_list_node
);
1207 snapshot_output_node
; snapshot_output_node
=
1208 xmlNextElementSibling(snapshot_output_node
)) {
1210 uint64_t max_size
= UINT64_MAX
;
1211 struct consumer_output output
= { 0 };
1212 struct lttng_snapshot_output
*snapshot_output
= NULL
;
1214 for (node
= xmlFirstElementChild(snapshot_output_node
); node
;
1215 node
= xmlNextElementSibling(node
)) {
1216 if (!strcmp((const char *) node
->name
,
1217 config_element_name
)) {
1219 name
= (char *) xmlNodeGetContent(node
);
1221 ret
= -LTTNG_ERR_NOMEM
;
1222 goto error_snapshot_output
;
1224 } else if (!strcmp((const char *) node
->name
,
1225 config_element_max_size
)) {
1226 xmlChar
*content
= xmlNodeGetContent(node
);
1230 ret
= -LTTNG_ERR_NOMEM
;
1231 goto error_snapshot_output
;
1233 ret
= parse_uint(content
, &max_size
);
1236 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1237 goto error_snapshot_output
;
1240 /* consumer_output */
1241 ret
= process_consumer_output(node
, &output
);
1243 goto error_snapshot_output
;
1248 snapshot_output
= lttng_snapshot_output_create();
1249 if (!snapshot_output
) {
1250 ret
= -LTTNG_ERR_NOMEM
;
1251 goto error_snapshot_output
;
1254 ret
= lttng_snapshot_output_set_name(name
, snapshot_output
);
1256 goto error_snapshot_output
;
1259 ret
= lttng_snapshot_output_set_size(max_size
, snapshot_output
);
1261 goto error_snapshot_output
;
1265 ret
= lttng_snapshot_output_set_ctrl_url(output
.path
,
1268 goto error_snapshot_output
;
1271 if (output
.control_uri
) {
1272 ret
= lttng_snapshot_output_set_ctrl_url(output
.control_uri
,
1275 goto error_snapshot_output
;
1279 if (output
.data_uri
) {
1280 ret
= lttng_snapshot_output_set_data_url(output
.data_uri
,
1283 goto error_snapshot_output
;
1288 ret
= lttng_snapshot_add_output(session_name
, snapshot_output
);
1289 error_snapshot_output
:
1292 free(output
.control_uri
);
1293 free(output
.data_uri
);
1294 lttng_snapshot_output_destroy(snapshot_output
);
1304 int create_session(const char *name
,
1305 struct lttng_domain
*kernel_domain
,
1306 struct lttng_domain
*ust_domain
,
1307 struct lttng_domain
*jul_domain
,
1308 struct lttng_domain
*log4j_domain
,
1309 xmlNodePtr output_node
,
1310 uint64_t live_timer_interval
)
1313 struct consumer_output output
= { 0 };
1314 xmlNodePtr consumer_output_node
;
1319 consumer_output_node
= xmlFirstElementChild(output_node
);
1320 if (!consumer_output_node
) {
1321 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1325 if (strcmp((const char *) consumer_output_node
->name
,
1326 config_element_consumer_output
)) {
1327 WARN("Invalid output type, expected %s node",
1328 config_element_consumer_output
);
1329 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1333 ret
= process_consumer_output(consumer_output_node
, &output
);
1339 if (live_timer_interval
!= UINT64_MAX
&&
1340 !output
.control_uri
&& !output
.data_uri
) {
1341 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1345 if (output
.control_uri
|| output
.data_uri
) {
1347 struct lttng_domain
*domain
;
1348 struct lttng_domain
*domains
[] =
1349 { kernel_domain
, ust_domain
, jul_domain
, log4j_domain
};
1351 /* network destination */
1352 if (live_timer_interval
&& live_timer_interval
!= UINT64_MAX
) {
1354 * URLs are provided for sure since the test above make sure that
1355 * with a live timer the data and control URIs are provided. So,
1356 * NULL is passed here and will be set right after.
1358 ret
= lttng_create_session_live(name
, NULL
, live_timer_interval
);
1360 ret
= lttng_create_session(name
, NULL
);
1366 for (i
= 0; i
< (sizeof(domains
) / sizeof(domains
[0])); i
++) {
1367 domain
= domains
[i
];
1372 ret
= create_session_net_output(name
, domain
, output
.control_uri
,
1379 /* either local output or no output */
1380 ret
= lttng_create_session(name
, output
.path
);
1387 free(output
.control_uri
);
1388 free(output
.data_uri
);
1392 int process_probe_attribute_node(xmlNodePtr probe_attribute_node
,
1393 struct lttng_event_probe_attr
*attr
)
1397 assert(probe_attribute_node
);
1400 if (!strcmp((const char *) probe_attribute_node
->name
,
1401 config_element_address
)) {
1406 content
= xmlNodeGetContent(probe_attribute_node
);
1408 ret
= -LTTNG_ERR_NOMEM
;
1412 ret
= parse_uint(content
, &addr
);
1415 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1420 } else if (!strcmp((const char *) probe_attribute_node
->name
,
1421 config_element_offset
)) {
1423 uint64_t offset
= 0;
1426 content
= xmlNodeGetContent(probe_attribute_node
);
1428 ret
= -LTTNG_ERR_NOMEM
;
1432 ret
= parse_uint(content
, &offset
);
1435 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1439 attr
->offset
= offset
;
1440 } else if (!strcmp((const char *) probe_attribute_node
->name
,
1441 config_element_symbol_name
)) {
1446 content
= xmlNodeGetContent(probe_attribute_node
);
1448 ret
= -LTTNG_ERR_NOMEM
;
1452 name_len
= strlen((char *) content
);
1453 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1454 WARN("symbol_name too long.");
1455 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1460 strncpy(attr
->symbol_name
, (const char *) content
, name_len
);
1469 int process_event_node(xmlNodePtr event_node
, struct lttng_handle
*handle
,
1470 const char *channel_name
)
1474 struct lttng_event event
;
1475 char **exclusions
= NULL
;
1476 unsigned long exclusion_count
= 0;
1477 char *filter_expression
= NULL
;
1481 assert(channel_name
);
1483 memset(&event
, 0, sizeof(event
));
1485 /* Initialize default log level which varies by domain */
1486 switch (handle
->domain
.type
)
1488 case LTTNG_DOMAIN_JUL
:
1489 event
.loglevel
= LTTNG_LOGLEVEL_JUL_ALL
;
1491 case LTTNG_DOMAIN_LOG4J
:
1492 event
.loglevel
= LTTNG_LOGLEVEL_LOG4J_ALL
;
1494 case LTTNG_DOMAIN_PYTHON
:
1495 event
.loglevel
= LTTNG_LOGLEVEL_PYTHON_DEBUG
;
1497 case LTTNG_DOMAIN_UST
:
1498 case LTTNG_DOMAIN_KERNEL
:
1499 event
.loglevel
= LTTNG_LOGLEVEL_DEBUG
;
1505 for (node
= xmlFirstElementChild(event_node
); node
;
1506 node
= xmlNextElementSibling(node
)) {
1507 if (!strcmp((const char *) node
->name
, config_element_name
)) {
1512 content
= xmlNodeGetContent(node
);
1514 ret
= -LTTNG_ERR_NOMEM
;
1518 name_len
= strlen((char *) content
);
1519 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1520 WARN("Channel name too long.");
1521 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1526 strncpy(event
.name
, (const char *) content
, name_len
);
1528 } else if (!strcmp((const char *) node
->name
,
1529 config_element_enabled
)) {
1530 xmlChar
*content
= xmlNodeGetContent(node
);
1534 ret
= -LTTNG_ERR_NOMEM
;
1538 ret
= parse_bool(content
, &event
.enabled
);
1541 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1544 } else if (!strcmp((const char *) node
->name
,
1545 config_element_type
)) {
1546 xmlChar
*content
= xmlNodeGetContent(node
);
1550 ret
= -LTTNG_ERR_NOMEM
;
1554 ret
= get_event_type(content
);
1557 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1562 } else if (!strcmp((const char *) node
->name
,
1563 config_element_loglevel_type
)) {
1564 xmlChar
*content
= xmlNodeGetContent(node
);
1568 ret
= -LTTNG_ERR_NOMEM
;
1572 ret
= get_loglevel_type(content
);
1575 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1579 event
.loglevel_type
= ret
;
1580 } else if (!strcmp((const char *) node
->name
,
1581 config_element_loglevel
)) {
1583 int64_t loglevel
= 0;
1586 content
= xmlNodeGetContent(node
);
1588 ret
= -LTTNG_ERR_NOMEM
;
1592 ret
= parse_int(content
, &loglevel
);
1595 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1599 if (loglevel
> INT_MAX
|| loglevel
< INT_MIN
) {
1600 WARN("loglevel out of range.");
1601 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1605 event
.loglevel
= loglevel
;
1606 } else if (!strcmp((const char *) node
->name
,
1607 config_element_filter
)) {
1609 xmlNodeGetContent(node
);
1613 ret
= -LTTNG_ERR_NOMEM
;
1617 filter_expression
= strdup((char *) content
);
1619 if (!filter_expression
) {
1620 ret
= -LTTNG_ERR_NOMEM
;
1623 } else if (!strcmp((const char *) node
->name
,
1624 config_element_exclusions
)) {
1625 xmlNodePtr exclusion_node
;
1626 int exclusion_index
= 0;
1631 * Exclusions has already been initialized,
1634 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1638 exclusion_count
= xmlChildElementCount(node
);
1639 if (!exclusion_count
) {
1643 exclusions
= zmalloc(exclusion_count
* sizeof(char *));
1645 exclusion_count
= 0;
1646 ret
= -LTTNG_ERR_NOMEM
;
1650 for (exclusion_node
= xmlFirstElementChild(node
); exclusion_node
;
1651 exclusion_node
= xmlNextElementSibling(exclusion_node
)) {
1653 xmlNodeGetContent(exclusion_node
);
1656 ret
= -LTTNG_ERR_NOMEM
;
1660 exclusions
[exclusion_index
] = strdup((const char *) content
);
1662 if (!exclusions
[exclusion_index
]) {
1663 ret
= -LTTNG_ERR_NOMEM
;
1669 event
.exclusion
= 1;
1670 } else if (!strcmp((const char *) node
->name
,
1671 config_element_attributes
)) {
1672 xmlNodePtr attribute_node
= xmlFirstElementChild(node
);
1675 if (!attribute_node
) {
1676 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1680 if (!strcmp((const char *) node
->name
,
1681 config_element_probe_attributes
)) {
1682 xmlNodePtr probe_attribute_node
;
1684 /* probe_attributes */
1685 for (probe_attribute_node
=
1686 xmlFirstElementChild(attribute_node
); probe_attribute_node
;
1687 probe_attribute_node
= xmlNextElementSibling(
1688 probe_attribute_node
)) {
1690 ret
= process_probe_attribute_node(probe_attribute_node
,
1699 xmlNodePtr symbol_node
= xmlFirstElementChild(attribute_node
);
1701 /* function_attributes */
1702 content
= xmlNodeGetContent(symbol_node
);
1704 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1708 sym_len
= strlen((char *) content
);
1709 if (sym_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1710 WARN("Function name too long.");
1711 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1716 strncpy(event
.attr
.ftrace
.symbol_name
, (char *) content
,
1723 ret
= lttng_enable_event_with_exclusions(handle
, &event
, channel_name
,
1724 filter_expression
, exclusion_count
, exclusions
);
1729 if (!event
.enabled
) {
1731 * Note that we should use lttng_disable_event_ext() (2.6+) to
1732 * eliminate the risk of clashing on events of the same
1733 * name (with different event types and loglevels).
1735 * Unfortunately, lttng_disable_event_ext() only performs a
1736 * match on the name and event type and errors out if any other
1737 * event attribute is not set to its default value.
1739 * This will disable all events that match this name.
1741 ret
= lttng_disable_event(handle
, event
.name
, channel_name
);
1744 for (i
= 0; i
< exclusion_count
; i
++) {
1745 free(exclusions
[i
]);
1749 free(filter_expression
);
1754 int process_events_node(xmlNodePtr events_node
, struct lttng_handle
*handle
,
1755 const char *channel_name
)
1760 assert(events_node
);
1762 assert(channel_name
);
1764 for (node
= xmlFirstElementChild(events_node
); node
;
1765 node
= xmlNextElementSibling(node
)) {
1766 ret
= process_event_node(node
, handle
, channel_name
);
1776 int process_channel_attr_node(xmlNodePtr attr_node
,
1777 struct lttng_channel
*channel
, xmlNodePtr
*contexts_node
,
1778 xmlNodePtr
*events_node
)
1784 assert(contexts_node
);
1785 assert(events_node
);
1787 if (!strcmp((const char *) attr_node
->name
, config_element_name
)) {
1792 content
= xmlNodeGetContent(attr_node
);
1794 ret
= -LTTNG_ERR_NOMEM
;
1798 name_len
= strlen((char *) content
);
1799 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1800 WARN("Channel name too long.");
1801 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1806 strncpy(channel
->name
, (const char *) content
, name_len
);
1808 } else if (!strcmp((const char *) attr_node
->name
,
1809 config_element_enabled
)) {
1814 content
= xmlNodeGetContent(attr_node
);
1816 ret
= -LTTNG_ERR_NOMEM
;
1820 ret
= parse_bool(content
, &enabled
);
1823 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1827 channel
->enabled
= enabled
;
1828 } else if (!strcmp((const char *) attr_node
->name
,
1829 config_element_overwrite_mode
)) {
1832 /* overwrite_mode */
1833 content
= xmlNodeGetContent(attr_node
);
1835 ret
= -LTTNG_ERR_NOMEM
;
1839 ret
= get_overwrite_mode(content
);
1842 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1846 channel
->attr
.overwrite
= ret
;
1847 } else if (!strcmp((const char *) attr_node
->name
,
1848 config_element_subbuf_size
)) {
1851 /* subbuffer_size */
1852 content
= xmlNodeGetContent(attr_node
);
1854 ret
= -LTTNG_ERR_NOMEM
;
1858 ret
= parse_uint(content
, &channel
->attr
.subbuf_size
);
1861 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1864 } else if (!strcmp((const char *) attr_node
->name
,
1865 config_element_num_subbuf
)) {
1868 /* subbuffer_count */
1869 content
= xmlNodeGetContent(attr_node
);
1871 ret
= -LTTNG_ERR_NOMEM
;
1875 ret
= parse_uint(content
, &channel
->attr
.num_subbuf
);
1878 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1881 } else if (!strcmp((const char *) attr_node
->name
,
1882 config_element_switch_timer_interval
)) {
1884 uint64_t switch_timer_interval
= 0;
1886 /* switch_timer_interval */
1887 content
= xmlNodeGetContent(attr_node
);
1889 ret
= -LTTNG_ERR_NOMEM
;
1893 ret
= parse_uint(content
, &switch_timer_interval
);
1896 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1900 if (switch_timer_interval
> UINT_MAX
) {
1901 WARN("switch_timer_interval out of range.");
1902 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1906 channel
->attr
.switch_timer_interval
=
1907 switch_timer_interval
;
1908 } else if (!strcmp((const char *) attr_node
->name
,
1909 config_element_read_timer_interval
)) {
1911 uint64_t read_timer_interval
= 0;
1913 /* read_timer_interval */
1914 content
= xmlNodeGetContent(attr_node
);
1916 ret
= -LTTNG_ERR_NOMEM
;
1920 ret
= parse_uint(content
, &read_timer_interval
);
1923 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1927 if (read_timer_interval
> UINT_MAX
) {
1928 WARN("read_timer_interval out of range.");
1929 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1933 channel
->attr
.read_timer_interval
=
1934 read_timer_interval
;
1935 } else if (!strcmp((const char *) attr_node
->name
,
1936 config_element_output_type
)) {
1940 content
= xmlNodeGetContent(attr_node
);
1942 ret
= -LTTNG_ERR_NOMEM
;
1946 ret
= get_output_type(content
);
1949 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1953 channel
->attr
.output
= ret
;
1954 } else if (!strcmp((const char *) attr_node
->name
,
1955 config_element_tracefile_size
)) {
1958 /* tracefile_size */
1959 content
= xmlNodeGetContent(attr_node
);
1961 ret
= -LTTNG_ERR_NOMEM
;
1965 ret
= parse_uint(content
, &channel
->attr
.tracefile_size
);
1968 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1971 } else if (!strcmp((const char *) attr_node
->name
,
1972 config_element_tracefile_count
)) {
1975 /* tracefile_count */
1976 content
= xmlNodeGetContent(attr_node
);
1978 ret
= -LTTNG_ERR_NOMEM
;
1982 ret
= parse_uint(content
, &channel
->attr
.tracefile_count
);
1985 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1988 } else if (!strcmp((const char *) attr_node
->name
,
1989 config_element_live_timer_interval
)) {
1991 uint64_t live_timer_interval
= 0;
1993 /* live_timer_interval */
1994 content
= xmlNodeGetContent(attr_node
);
1996 ret
= -LTTNG_ERR_NOMEM
;
2000 ret
= parse_uint(content
, &live_timer_interval
);
2003 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2007 if (live_timer_interval
> UINT_MAX
) {
2008 WARN("live_timer_interval out of range.");
2009 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2013 channel
->attr
.live_timer_interval
=
2014 live_timer_interval
;
2015 } else if (!strcmp((const char *) attr_node
->name
,
2016 config_element_events
)) {
2018 *events_node
= attr_node
;
2021 *contexts_node
= attr_node
;
2029 int process_context_node(xmlNodePtr context_node
,
2030 struct lttng_handle
*handle
, const char *channel_name
)
2033 struct lttng_event_context context
;
2034 xmlNodePtr context_child_node
= xmlFirstElementChild(context_node
);
2037 assert(channel_name
);
2039 if (!context_child_node
) {
2040 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2044 memset(&context
, 0, sizeof(context
));
2046 if (!strcmp((const char *) context_child_node
->name
,
2047 config_element_type
)) {
2049 xmlChar
*content
= xmlNodeGetContent(context_child_node
);
2052 ret
= -LTTNG_ERR_NOMEM
;
2056 ret
= get_context_type(content
);
2059 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2064 } else if (!strcmp((const char *) context_child_node
->name
,
2065 config_element_context_perf
)) {
2067 xmlNodePtr perf_attr_node
;
2069 context
.ctx
= handle
->domain
.type
== LTTNG_DOMAIN_KERNEL
?
2070 LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER
:
2071 LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER
;
2072 for (perf_attr_node
= xmlFirstElementChild(context_child_node
);
2073 perf_attr_node
; perf_attr_node
=
2074 xmlNextElementSibling(perf_attr_node
)) {
2075 if (!strcmp((const char *) perf_attr_node
->name
,
2076 config_element_type
)) {
2081 content
= xmlNodeGetContent(perf_attr_node
);
2083 ret
= -LTTNG_ERR_NOMEM
;
2087 ret
= parse_uint(content
, &type
);
2090 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2094 if (type
> UINT32_MAX
) {
2095 WARN("perf context type out of range.");
2096 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2100 context
.u
.perf_counter
.type
= type
;
2101 } else if (!strcmp((const char *) perf_attr_node
->name
,
2102 config_element_config
)) {
2104 uint64_t config
= 0;
2107 content
= xmlNodeGetContent(perf_attr_node
);
2109 ret
= -LTTNG_ERR_NOMEM
;
2113 ret
= parse_uint(content
, &config
);
2116 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2120 context
.u
.perf_counter
.config
= config
;
2121 } else if (!strcmp((const char *) perf_attr_node
->name
,
2122 config_element_name
)) {
2127 content
= xmlNodeGetContent(perf_attr_node
);
2129 ret
= -LTTNG_ERR_NOMEM
;
2133 name_len
= strlen((char *) content
);
2134 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
2135 WARN("perf context name too long.");
2136 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2141 strncpy(context
.u
.perf_counter
.name
, (const char *) content
,
2146 } else if (!strcmp((const char *) context_child_node
->name
,
2147 config_element_context_app
)) {
2148 /* application context */
2149 xmlNodePtr app_ctx_node
;
2151 context
.ctx
= LTTNG_EVENT_CONTEXT_APP_CONTEXT
;
2152 for (app_ctx_node
= xmlFirstElementChild(context_child_node
);
2153 app_ctx_node
; app_ctx_node
=
2154 xmlNextElementSibling(app_ctx_node
)) {
2156 char **target
= strcmp(
2157 (const char *) app_ctx_node
->name
,
2158 config_element_context_app_provider_name
) == 0 ?
2159 &context
.u
.app_ctx
.provider_name
:
2160 &context
.u
.app_ctx
.ctx_name
;
2162 content
= xmlNodeGetContent(app_ctx_node
);
2164 ret
= -LTTNG_ERR_NOMEM
;
2168 *target
= (char *) content
;
2171 /* Unrecognized context type */
2172 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2176 ret
= lttng_add_context(handle
, &context
, NULL
, channel_name
);
2177 if (context
.ctx
== LTTNG_EVENT_CONTEXT_APP_CONTEXT
) {
2178 free(context
.u
.app_ctx
.provider_name
);
2179 free(context
.u
.app_ctx
.ctx_name
);
2186 int process_contexts_node(xmlNodePtr contexts_node
,
2187 struct lttng_handle
*handle
, const char *channel_name
)
2190 xmlNodePtr context_node
;
2192 for (context_node
= xmlFirstElementChild(contexts_node
); context_node
;
2193 context_node
= xmlNextElementSibling(context_node
)) {
2194 ret
= process_context_node(context_node
, handle
, channel_name
);
2204 int process_pid_tracker_node(xmlNodePtr pid_tracker_node
,
2205 struct lttng_handle
*handle
)
2208 xmlNodePtr targets_node
= NULL
;
2212 assert(pid_tracker_node
);
2213 /* get the targets node */
2214 for (node
= xmlFirstElementChild(pid_tracker_node
); node
;
2215 node
= xmlNextElementSibling(node
)) {
2216 if (!strcmp((const char *) node
->name
,
2217 config_element_targets
)) {
2218 targets_node
= node
;
2223 if (!targets_node
) {
2224 ret
= LTTNG_ERR_INVALID
;
2228 /* Go through all pid_target node */
2229 child
= xmlChildElementCount(targets_node
);
2231 /* The session is explicitly set to target nothing. */
2232 ret
= lttng_untrack_pid(handle
, -1);
2237 for (node
= xmlFirstElementChild(targets_node
); node
;
2238 node
= xmlNextElementSibling(node
)) {
2239 xmlNodePtr pid_target_node
= node
;
2241 /* get pid node and track it */
2242 for (node
= xmlFirstElementChild(pid_target_node
); node
;
2243 node
= xmlNextElementSibling(node
)) {
2244 if (!strcmp((const char *) node
->name
,
2245 config_element_pid
)) {
2247 xmlChar
*content
= NULL
;
2249 content
= xmlNodeGetContent(node
);
2251 ret
= LTTNG_ERR_LOAD_INVALID_CONFIG
;
2255 ret
= parse_int(content
, &pid
);
2258 ret
= LTTNG_ERR_LOAD_INVALID_CONFIG
;
2262 ret
= lttng_track_pid(handle
, (int) pid
);
2268 node
= pid_target_node
;
2277 int process_domain_node(xmlNodePtr domain_node
, const char *session_name
)
2280 struct lttng_domain domain
= { 0 };
2281 struct lttng_handle
*handle
= NULL
;
2282 xmlNodePtr channels_node
= NULL
;
2283 xmlNodePtr trackers_node
= NULL
;
2284 xmlNodePtr pid_tracker_node
= NULL
;
2287 assert(session_name
);
2289 ret
= init_domain(domain_node
, &domain
);
2294 handle
= lttng_create_handle(session_name
, &domain
);
2296 ret
= -LTTNG_ERR_NOMEM
;
2300 /* get the channels node */
2301 for (node
= xmlFirstElementChild(domain_node
); node
;
2302 node
= xmlNextElementSibling(node
)) {
2303 if (!strcmp((const char *) node
->name
,
2304 config_element_channels
)) {
2305 channels_node
= node
;
2310 if (!channels_node
) {
2314 /* create all channels */
2315 for (node
= xmlFirstElementChild(channels_node
); node
;
2316 node
= xmlNextElementSibling(node
)) {
2317 struct lttng_channel channel
;
2318 xmlNodePtr contexts_node
= NULL
;
2319 xmlNodePtr events_node
= NULL
;
2320 xmlNodePtr channel_attr_node
;
2322 memset(&channel
, 0, sizeof(channel
));
2323 lttng_channel_set_default_attr(&domain
, &channel
.attr
);
2325 for (channel_attr_node
= xmlFirstElementChild(node
);
2326 channel_attr_node
; channel_attr_node
=
2327 xmlNextElementSibling(channel_attr_node
)) {
2328 ret
= process_channel_attr_node(channel_attr_node
,
2329 &channel
, &contexts_node
, &events_node
);
2335 ret
= lttng_enable_channel(handle
, &channel
);
2340 ret
= process_events_node(events_node
, handle
, channel
.name
);
2345 ret
= process_contexts_node(contexts_node
, handle
,
2352 /* get the trackers node */
2353 for (node
= xmlFirstElementChild(domain_node
); node
;
2354 node
= xmlNextElementSibling(node
)) {
2355 if (!strcmp((const char *) node
->name
,
2356 config_element_trackers
)) {
2357 trackers_node
= node
;
2362 if (!trackers_node
) {
2366 for (node
= xmlFirstElementChild(trackers_node
); node
;
2367 node
= xmlNextElementSibling(node
)) {
2368 if (!strcmp((const char *)node
->name
,config_element_pid_tracker
)) {
2369 pid_tracker_node
= node
;
2370 ret
= process_pid_tracker_node(pid_tracker_node
, handle
);
2377 if (!pid_tracker_node
) {
2378 lttng_track_pid(handle
, -1);
2382 lttng_destroy_handle(handle
);
2387 int process_session_node(xmlNodePtr session_node
, const char *session_name
,
2390 int ret
, started
= -1, snapshot_mode
= -1;
2391 uint64_t live_timer_interval
= UINT64_MAX
;
2392 xmlChar
*name
= NULL
;
2393 xmlChar
*shm_path
= NULL
;
2394 xmlNodePtr domains_node
= NULL
;
2395 xmlNodePtr output_node
= NULL
;
2397 struct lttng_domain
*kernel_domain
= NULL
;
2398 struct lttng_domain
*ust_domain
= NULL
;
2399 struct lttng_domain
*jul_domain
= NULL
;
2400 struct lttng_domain
*log4j_domain
= NULL
;
2401 struct lttng_domain
*python_domain
= NULL
;
2403 for (node
= xmlFirstElementChild(session_node
); node
;
2404 node
= xmlNextElementSibling(node
)) {
2405 if (!name
&& !strcmp((const char *) node
->name
,
2406 config_element_name
)) {
2408 xmlChar
*node_content
= xmlNodeGetContent(node
);
2409 if (!node_content
) {
2410 ret
= -LTTNG_ERR_NOMEM
;
2414 name
= node_content
;
2415 } else if (!domains_node
&& !strcmp((const char *) node
->name
,
2416 config_element_domains
)) {
2418 domains_node
= node
;
2419 } else if (started
== -1 && !strcmp((const char *) node
->name
,
2420 config_element_started
)) {
2422 xmlChar
*node_content
= xmlNodeGetContent(node
);
2423 if (!node_content
) {
2424 ret
= -LTTNG_ERR_NOMEM
;
2428 ret
= parse_bool(node_content
, &started
);
2431 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2434 } else if (!output_node
&& !strcmp((const char *) node
->name
,
2435 config_element_output
)) {
2438 } else if (!shm_path
&& !strcmp((const char *) node
->name
,
2439 config_element_shared_memory_path
)) {
2440 /* shared memory path */
2441 xmlChar
*node_content
= xmlNodeGetContent(node
);
2442 if (!node_content
) {
2443 ret
= -LTTNG_ERR_NOMEM
;
2447 shm_path
= node_content
;
2449 /* attributes, snapshot_mode or live_timer_interval */
2450 xmlNodePtr attributes_child
=
2451 xmlFirstElementChild(node
);
2453 if (!strcmp((const char *) attributes_child
->name
,
2454 config_element_snapshot_mode
)) {
2456 xmlChar
*snapshot_mode_content
=
2457 xmlNodeGetContent(attributes_child
);
2458 if (!snapshot_mode_content
) {
2459 ret
= -LTTNG_ERR_NOMEM
;
2463 ret
= parse_bool(snapshot_mode_content
, &snapshot_mode
);
2464 free(snapshot_mode_content
);
2466 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2470 /* live_timer_interval */
2471 xmlChar
*timer_interval_content
=
2472 xmlNodeGetContent(attributes_child
);
2473 if (!timer_interval_content
) {
2474 ret
= -LTTNG_ERR_NOMEM
;
2478 ret
= parse_uint(timer_interval_content
, &live_timer_interval
);
2479 free(timer_interval_content
);
2481 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2489 /* Mandatory attribute, as defined in the session XSD */
2490 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2494 if (session_name
&& strcmp((char *) name
, session_name
)) {
2495 /* This is not the session we are looking for */
2496 ret
= -LTTNG_ERR_NO_SESSION
;
2500 /* Init domains to create the session handles */
2501 for (node
= xmlFirstElementChild(domains_node
); node
;
2502 node
= xmlNextElementSibling(node
)) {
2503 struct lttng_domain
*domain
;
2505 domain
= zmalloc(sizeof(*domain
));
2507 ret
= -LTTNG_ERR_NOMEM
;
2511 ret
= init_domain(node
, domain
);
2513 goto domain_init_error
;
2516 switch (domain
->type
) {
2517 case LTTNG_DOMAIN_KERNEL
:
2518 if (kernel_domain
) {
2519 /* Same domain seen twice, invalid! */
2520 goto domain_init_error
;
2522 kernel_domain
= domain
;
2524 case LTTNG_DOMAIN_UST
:
2526 /* Same domain seen twice, invalid! */
2527 goto domain_init_error
;
2529 ust_domain
= domain
;
2531 case LTTNG_DOMAIN_JUL
:
2533 /* Same domain seen twice, invalid! */
2534 goto domain_init_error
;
2536 jul_domain
= domain
;
2538 case LTTNG_DOMAIN_LOG4J
:
2540 /* Same domain seen twice, invalid! */
2541 goto domain_init_error
;
2543 log4j_domain
= domain
;
2545 case LTTNG_DOMAIN_PYTHON
:
2546 if (python_domain
) {
2547 /* Same domain seen twice, invalid! */
2548 goto domain_init_error
;
2550 python_domain
= domain
;
2553 WARN("Invalid domain type");
2554 goto domain_init_error
;
2559 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2564 /* Destroy session if it exists */
2565 ret
= lttng_destroy_session((const char *) name
);
2566 if (ret
&& ret
!= -LTTNG_ERR_SESS_NOT_FOUND
) {
2567 ERR("Failed to destroy existing session.");
2572 /* Create session type depending on output type */
2573 if (snapshot_mode
&& snapshot_mode
!= -1) {
2574 ret
= create_snapshot_session((const char *) name
, output_node
);
2575 } else if (live_timer_interval
&&
2576 live_timer_interval
!= UINT64_MAX
) {
2577 ret
= create_session((const char *) name
, kernel_domain
,
2578 ust_domain
, jul_domain
, log4j_domain
,
2579 output_node
, live_timer_interval
);
2581 /* regular session */
2582 ret
= create_session((const char *) name
, kernel_domain
,
2583 ust_domain
, jul_domain
, log4j_domain
,
2584 output_node
, UINT64_MAX
);
2591 ret
= lttng_set_session_shm_path((const char *) name
,
2592 (const char *) shm_path
);
2598 for (node
= xmlFirstElementChild(domains_node
); node
;
2599 node
= xmlNextElementSibling(node
)) {
2600 ret
= process_domain_node(node
, (const char *) name
);
2607 ret
= lttng_start_tracing((const char *) name
);
2615 ERR("Failed to load session %s: %s", (const char *) name
,
2616 lttng_strerror(ret
));
2617 lttng_destroy_session((const char *) name
);
2621 free(kernel_domain
);
2625 free(python_domain
);
2632 * Return 1 if the given path is readable by the current UID or 0 if not.
2633 * Return -1 if the path is EPERM.
2635 static int validate_file_read_creds(const char *path
)
2641 /* Can we read the file. */
2642 ret
= access(path
, R_OK
);
2646 if (errno
== EACCES
) {
2657 int load_session_from_file(const char *path
, const char *session_name
,
2658 struct session_config_validation_ctx
*validation_ctx
, int override
)
2660 int ret
, session_found
= !session_name
;
2661 xmlDocPtr doc
= NULL
;
2662 xmlNodePtr sessions_node
;
2663 xmlNodePtr session_node
;
2666 assert(validation_ctx
);
2668 ret
= validate_file_read_creds(path
);
2671 ret
= -LTTNG_ERR_EPERM
;
2673 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2678 doc
= xmlParseFile(path
);
2680 ret
= -LTTNG_ERR_LOAD_IO_FAIL
;
2684 ret
= xmlSchemaValidateDoc(validation_ctx
->schema_validation_ctx
, doc
);
2686 ERR("Session configuration file validation failed");
2687 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2691 sessions_node
= xmlDocGetRootElement(doc
);
2692 if (!sessions_node
) {
2696 for (session_node
= xmlFirstElementChild(sessions_node
);
2697 session_node
; session_node
=
2698 xmlNextElementSibling(session_node
)) {
2699 ret
= process_session_node(session_node
,
2700 session_name
, override
);
2701 if (session_name
&& ret
== 0) {
2702 /* Target session found and loaded */
2710 ret
= session_found
? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT
;
2715 /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */
2717 struct dirent
*alloc_dirent(const char *path
)
2721 struct dirent
*entry
;
2723 name_max
= pathconf(path
, _PC_NAME_MAX
);
2724 if (name_max
== -1) {
2725 name_max
= PATH_MAX
;
2727 len
= offsetof(struct dirent
, d_name
) + name_max
+ 1;
2728 entry
= zmalloc(len
);
2733 int load_session_from_path(const char *path
, const char *session_name
,
2734 struct session_config_validation_ctx
*validation_ctx
, int override
)
2736 int ret
, session_found
= !session_name
;
2737 DIR *directory
= NULL
;
2740 assert(validation_ctx
);
2742 directory
= opendir(path
);
2746 /* Try the file loading. */
2749 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2752 ret
= -LTTNG_ERR_LOAD_IO_FAIL
;
2757 struct dirent
*entry
;
2758 struct dirent
*result
;
2759 char *file_path
= NULL
;
2760 size_t path_len
= strlen(path
);
2762 if (path_len
>= PATH_MAX
) {
2763 ret
= -LTTNG_ERR_INVALID
;
2767 entry
= alloc_dirent(path
);
2769 ret
= -LTTNG_ERR_NOMEM
;
2773 file_path
= zmalloc(PATH_MAX
);
2775 ret
= -LTTNG_ERR_NOMEM
;
2780 strncpy(file_path
, path
, path_len
);
2781 if (file_path
[path_len
- 1] != '/') {
2782 file_path
[path_len
++] = '/';
2786 /* Search for *.lttng files */
2787 while (!readdir_r(directory
, entry
, &result
) && result
) {
2788 size_t file_name_len
= strlen(result
->d_name
);
2790 if (file_name_len
<=
2791 sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
)) {
2795 if (path_len
+ file_name_len
>= PATH_MAX
) {
2799 if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
,
2800 result
->d_name
+ file_name_len
- sizeof(
2801 DEFAULT_SESSION_CONFIG_FILE_EXTENSION
) + 1)) {
2805 strncpy(file_path
+ path_len
, result
->d_name
, file_name_len
);
2806 file_path
[path_len
+ file_name_len
] = '\0';
2808 ret
= load_session_from_file(file_path
, session_name
,
2809 validation_ctx
, override
);
2810 if (session_name
&& !ret
) {
2819 ret
= load_session_from_file(path
, session_name
,
2820 validation_ctx
, override
);
2830 if (closedir(directory
)) {
2835 if (!session_found
) {
2836 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2843 * Validate that the given path's credentials and the current process have the
2844 * same UID. If so, return 1 else return 0 if it does NOT match.
2846 static int validate_path_creds(const char *path
)
2848 int ret
, uid
= getuid();
2857 ret
= stat(path
, &buf
);
2859 if (errno
!= ENOENT
) {
2862 ret
= -LTTNG_ERR_INVALID
;
2866 if (buf
.st_uid
!= uid
) {
2877 int config_load_session(const char *path
, const char *session_name
,
2878 int override
, unsigned int autoload
)
2881 const char *path_ptr
= NULL
;
2882 struct session_config_validation_ctx validation_ctx
= { 0 };
2884 ret
= init_session_config_validation_ctx(&validation_ctx
);
2891 const char *sys_path
;
2894 home_path
= utils_get_home_dir();
2896 char path
[PATH_MAX
];
2899 * Try user session configuration path. Ignore error here so we can
2900 * continue loading the system wide sessions.
2903 ret
= snprintf(path
, sizeof(path
),
2904 DEFAULT_SESSION_HOME_CONFIGPATH
"/"
2905 DEFAULT_SESSION_CONFIG_AUTOLOAD
, home_path
);
2907 PERROR("snprintf session autoload home config path");
2912 * Credentials are only validated for the autoload in order to
2913 * avoid any user session daemon to try to load kernel sessions
2914 * automatically and failing all the times.
2916 ret
= validate_path_creds(path
);
2921 ret
= snprintf(path
, sizeof(path
),
2922 DEFAULT_SESSION_HOME_CONFIGPATH
, home_path
);
2924 PERROR("snprintf session home config path");
2930 ret
= load_session_from_path(path_ptr
, session_name
,
2931 &validation_ctx
, override
);
2932 if (ret
&& ret
!= -LTTNG_ERR_LOAD_SESSION_NOENT
) {
2936 * Continue even if the session was found since we have to try
2937 * the system wide sessions.
2942 /* Reset path pointer for the system wide dir. */
2945 /* Try system wide configuration directory. */
2947 sys_path
= DEFAULT_SESSION_SYSTEM_CONFIGPATH
"/"
2948 DEFAULT_SESSION_CONFIG_AUTOLOAD
;
2949 ret
= validate_path_creds(sys_path
);
2951 path_ptr
= sys_path
;
2954 sys_path
= DEFAULT_SESSION_SYSTEM_CONFIGPATH
;
2955 path_ptr
= sys_path
;
2959 ret
= load_session_from_path(path_ptr
, session_name
,
2960 &validation_ctx
, override
);
2963 ret
= access(path
, F_OK
);
2968 ret
= -LTTNG_ERR_INVALID
;
2969 WARN("Session configuration path does not exist.");
2972 ret
= -LTTNG_ERR_EPERM
;
2975 ret
= -LTTNG_ERR_UNK
;
2981 ret
= load_session_from_path(path
, session_name
,
2982 &validation_ctx
, override
);
2985 fini_session_config_validation_ctx(&validation_ctx
);
2986 if (ret
== -LTTNG_ERR_LOAD_SESSION_NOENT
&& !session_name
&& !path
) {
2988 * Don't report an error if no sessions are found when called
2989 * without a session_name or a search path.