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>
31 #include <common/defaults.h>
32 #include <common/error.h>
33 #include <common/macros.h>
34 #include <common/utils.h>
35 #include <common/compat/getenv.h>
36 #include <lttng/lttng-error.h>
37 #include <libxml/parser.h>
38 #include <libxml/valid.h>
39 #include <libxml/xmlschemas.h>
40 #include <libxml/tree.h>
41 #include <libxml/xpath.h>
42 #include <lttng/lttng.h>
43 #include <lttng/snapshot.h>
45 #include "session-config.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 LTTNG_HIDDEN
const char * const config_element_discarded_events
= "discarded_events";
101 LTTNG_HIDDEN
const char * const config_element_lost_packets
= "lost_packets";
102 const char * const config_element_type
= "type";
103 const char * const config_element_buffer_type
= "buffer_type";
104 const char * const config_element_session
= "session";
105 const char * const config_element_sessions
= "sessions";
106 LTTNG_HIDDEN
const char * const config_element_context_perf
= "perf";
107 LTTNG_HIDDEN
const char * const config_element_context_app
= "app";
108 LTTNG_HIDDEN
const char * const config_element_context_app_provider_name
= "provider_name";
109 LTTNG_HIDDEN
const char * const config_element_context_app_ctx_name
= "ctx_name";
110 const char * const config_element_config
= "config";
111 const char * const config_element_started
= "started";
112 const char * const config_element_snapshot_mode
= "snapshot_mode";
113 const char * const config_element_loglevel
= "loglevel";
114 const char * const config_element_loglevel_type
= "loglevel_type";
115 const char * const config_element_filter
= "filter";
116 LTTNG_HIDDEN
const char * const config_element_filter_expression
= "filter_expression";
117 const char * const config_element_snapshot_outputs
= "snapshot_outputs";
118 const char * const config_element_consumer_output
= "consumer_output";
119 const char * const config_element_destination
= "destination";
120 const char * const config_element_path
= "path";
121 const char * const config_element_net_output
= "net_output";
122 const char * const config_element_control_uri
= "control_uri";
123 const char * const config_element_data_uri
= "data_uri";
124 const char * const config_element_max_size
= "max_size";
125 const char * const config_element_pid
= "pid";
126 const char * const config_element_pids
= "pids";
127 const char * const config_element_shared_memory_path
= "shared_memory_path";
128 const char * const config_element_pid_tracker
= "pid_tracker";
129 const char * const config_element_trackers
= "trackers";
130 const char * const config_element_targets
= "targets";
131 const char * const config_element_target_pid
= "pid_target";
132 const char * const config_element_omit_name
= "omit_name";
133 const char * const config_element_omit_output
= "omit_output";
135 const char * const config_domain_type_kernel
= "KERNEL";
136 const char * const config_domain_type_ust
= "UST";
137 const char * const config_domain_type_jul
= "JUL";
138 const char * const config_domain_type_log4j
= "LOG4J";
139 const char * const config_domain_type_python
= "PYTHON";
141 const char * const config_buffer_type_per_pid
= "PER_PID";
142 const char * const config_buffer_type_per_uid
= "PER_UID";
143 const char * const config_buffer_type_global
= "GLOBAL";
145 const char * const config_overwrite_mode_discard
= "DISCARD";
146 const char * const config_overwrite_mode_overwrite
= "OVERWRITE";
148 const char * const config_output_type_splice
= "SPLICE";
149 const char * const config_output_type_mmap
= "MMAP";
151 const char * const config_loglevel_type_all
= "ALL";
152 const char * const config_loglevel_type_range
= "RANGE";
153 const char * const config_loglevel_type_single
= "SINGLE";
155 const char * const config_event_type_all
= "ALL";
156 const char * const config_event_type_tracepoint
= "TRACEPOINT";
157 const char * const config_event_type_probe
= "PROBE";
158 const char * const config_event_type_function
= "FUNCTION";
159 const char * const config_event_type_function_entry
= "FUNCTION_ENTRY";
160 const char * const config_event_type_noop
= "NOOP";
161 const char * const config_event_type_syscall
= "SYSCALL";
162 const char * const config_event_type_kprobe
= "KPROBE";
163 const char * const config_event_type_kretprobe
= "KRETPROBE";
165 const char * const config_event_context_pid
= "PID";
166 const char * const config_event_context_procname
= "PROCNAME";
167 const char * const config_event_context_prio
= "PRIO";
168 const char * const config_event_context_nice
= "NICE";
169 const char * const config_event_context_vpid
= "VPID";
170 const char * const config_event_context_tid
= "TID";
171 const char * const config_event_context_vtid
= "VTID";
172 const char * const config_event_context_ppid
= "PPID";
173 const char * const config_event_context_vppid
= "VPPID";
174 const char * const config_event_context_pthread_id
= "PTHREAD_ID";
175 const char * const config_event_context_hostname
= "HOSTNAME";
176 const char * const config_event_context_ip
= "IP";
177 const char * const config_event_context_perf_thread_counter
= "PERF_THREAD_COUNTER";
178 LTTNG_HIDDEN
const char * const config_event_context_app
= "APP";
179 LTTNG_HIDDEN
const char * const config_event_context_interruptible
= "INTERRUPTIBLE";
180 LTTNG_HIDDEN
const char * const config_event_context_preemptible
= "PREEMPTIBLE";
181 LTTNG_HIDDEN
const char * const config_event_context_need_reschedule
= "NEED_RESCHEDULE";
182 LTTNG_HIDDEN
const char * const config_event_context_migratable
= "MIGRATABLE";
184 /* Deprecated symbols */
185 const char * const config_element_perf
;
187 enum process_event_node_phase
{
192 struct consumer_output
{
199 static int config_entry_handler_filter(struct handler_filter_args
*args
,
200 const char *section
, const char *name
, const char *value
)
203 struct config_entry entry
= { section
, name
, value
};
207 if (!section
|| !name
|| !value
) {
213 if (strcmp(args
->section
, section
)) {
218 ret
= args
->handler(&entry
, args
->user_data
);
224 int config_get_section_entries(const char *override_path
, const char *section
,
225 config_entry_handler_cb handler
, void *user_data
)
229 FILE *config_file
= NULL
;
230 struct handler_filter_args filter
= { section
, handler
, user_data
};
232 /* First, try system-wide conf. file. */
233 path
= DEFAULT_DAEMON_SYSTEM_CONFIGPATH
;
235 config_file
= fopen(path
, "r");
237 DBG("Loading daemon conf file at %s", path
);
239 * Return value is not very important here since error or not, we
240 * continue and try the next possible conf. file.
242 (void) ini_parse_file(config_file
,
243 (ini_entry_handler
) config_entry_handler_filter
,
248 /* Second is the user local configuration. */
249 path
= utils_get_home_dir();
251 char fullpath
[PATH_MAX
];
253 ret
= snprintf(fullpath
, sizeof(fullpath
),
254 DEFAULT_DAEMON_HOME_CONFIGPATH
, path
);
256 PERROR("snprintf user conf. path");
260 config_file
= fopen(fullpath
, "r");
262 DBG("Loading daemon user conf file at %s", path
);
264 * Return value is not very important here since error or not, we
265 * continue and try the next possible conf. file.
267 (void) ini_parse_file(config_file
,
268 (ini_entry_handler
) config_entry_handler_filter
,
274 /* Final path is the one that the user might have provided. */
276 config_file
= fopen(override_path
, "r");
278 DBG("Loading daemon command line conf file at %s", override_path
);
279 (void) ini_parse_file(config_file
,
280 (ini_entry_handler
) config_entry_handler_filter
,
284 ERR("Failed to open daemon configuration file at %s",
291 /* Everything went well. */
299 int config_parse_value(const char *value
)
302 char *endptr
, *lower_str
;
312 v
= strtoul(value
, &endptr
, 10);
313 if (endptr
!= value
) {
318 lower_str
= zmalloc(len
+ 1);
325 for (i
= 0; i
< len
; i
++) {
326 lower_str
[i
] = tolower(value
[i
]);
329 if (!strcmp(lower_str
, config_str_yes
) ||
330 !strcmp(lower_str
, config_str_true
) ||
331 !strcmp(lower_str
, config_str_on
)) {
333 } else if (!strcmp(lower_str
, config_str_no
) ||
334 !strcmp(lower_str
, config_str_false
) ||
335 !strcmp(lower_str
, config_str_off
)) {
347 * Returns a xmlChar string which must be released using xmlFree().
349 static xmlChar
*encode_string(const char *in_str
)
351 xmlChar
*out_str
= NULL
;
352 xmlCharEncodingHandlerPtr handler
;
353 int out_len
, ret
, in_len
;
357 handler
= xmlFindCharEncodingHandler(config_xml_encoding
);
359 ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!");
363 in_len
= strlen(in_str
);
365 * Add 1 byte for the NULL terminted character. The factor 4 here is
366 * used because UTF-8 characters can take up to 4 bytes.
368 out_len
= (in_len
* 4) + 1;
369 out_str
= xmlMalloc(out_len
);
374 ret
= handler
->input(out_str
, &out_len
, (const xmlChar
*) in_str
, &in_len
);
381 /* out_len is now the size of out_str */
382 out_str
[out_len
] = '\0';
388 struct config_writer
*config_writer_create(int fd_output
, int indent
)
391 struct config_writer
*writer
;
392 xmlOutputBufferPtr buffer
;
394 writer
= zmalloc(sizeof(struct config_writer
));
396 PERROR("zmalloc config_writer_create");
400 buffer
= xmlOutputBufferCreateFd(fd_output
, NULL
);
405 writer
->writer
= xmlNewTextWriter(buffer
);
406 ret
= xmlTextWriterStartDocument(writer
->writer
, NULL
,
407 config_xml_encoding
, NULL
);
412 ret
= xmlTextWriterSetIndentString(writer
->writer
,
413 BAD_CAST config_xml_indent_string
);
418 ret
= xmlTextWriterSetIndent(writer
->writer
, indent
);
426 config_writer_destroy(writer
);
431 int config_writer_destroy(struct config_writer
*writer
)
440 if (xmlTextWriterEndDocument(writer
->writer
) < 0) {
441 WARN("Could not close XML document");
445 if (writer
->writer
) {
446 xmlFreeTextWriter(writer
->writer
);
455 int config_writer_open_element(struct config_writer
*writer
,
456 const char *element_name
)
459 xmlChar
*encoded_element_name
;
461 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
466 encoded_element_name
= encode_string(element_name
);
467 if (!encoded_element_name
) {
472 ret
= xmlTextWriterStartElement(writer
->writer
, encoded_element_name
);
473 xmlFree(encoded_element_name
);
475 return ret
>= 0 ? 0 : ret
;
479 int config_writer_write_attribute(struct config_writer
*writer
,
480 const char *name
, const char *value
)
483 xmlChar
*encoded_name
= NULL
;
484 xmlChar
*encoded_value
= NULL
;
486 if (!writer
|| !writer
->writer
|| !name
|| !name
[0]) {
491 encoded_name
= encode_string(name
);
497 encoded_value
= encode_string(value
);
498 if (!encoded_value
) {
503 ret
= xmlTextWriterWriteAttribute(writer
->writer
, encoded_name
,
506 xmlFree(encoded_name
);
507 xmlFree(encoded_value
);
508 return ret
>= 0 ? 0 : ret
;
512 int config_writer_close_element(struct config_writer
*writer
)
516 if (!writer
|| !writer
->writer
) {
521 ret
= xmlTextWriterEndElement(writer
->writer
);
523 return ret
>= 0 ? 0 : ret
;
527 int config_writer_write_element_unsigned_int(struct config_writer
*writer
,
528 const char *element_name
, uint64_t value
)
531 xmlChar
*encoded_element_name
;
533 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
538 encoded_element_name
= encode_string(element_name
);
539 if (!encoded_element_name
) {
544 ret
= xmlTextWriterWriteFormatElement(writer
->writer
,
545 encoded_element_name
, "%" PRIu64
, value
);
546 xmlFree(encoded_element_name
);
548 return ret
>= 0 ? 0 : ret
;
552 int config_writer_write_element_signed_int(struct config_writer
*writer
,
553 const char *element_name
, int64_t value
)
556 xmlChar
*encoded_element_name
;
558 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
563 encoded_element_name
= encode_string(element_name
);
564 if (!encoded_element_name
) {
569 ret
= xmlTextWriterWriteFormatElement(writer
->writer
,
570 encoded_element_name
, "%" PRIi64
, value
);
571 xmlFree(encoded_element_name
);
573 return ret
>= 0 ? 0 : ret
;
577 int config_writer_write_element_bool(struct config_writer
*writer
,
578 const char *element_name
, int value
)
580 return config_writer_write_element_string(writer
, element_name
,
581 value
? config_xml_true
: config_xml_false
);
585 int config_writer_write_element_string(struct config_writer
*writer
,
586 const char *element_name
, const char *value
)
589 xmlChar
*encoded_element_name
= NULL
;
590 xmlChar
*encoded_value
= NULL
;
592 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0] ||
598 encoded_element_name
= encode_string(element_name
);
599 if (!encoded_element_name
) {
604 encoded_value
= encode_string(value
);
605 if (!encoded_value
) {
610 ret
= xmlTextWriterWriteElement(writer
->writer
, encoded_element_name
,
613 xmlFree(encoded_element_name
);
614 xmlFree(encoded_value
);
615 return ret
>= 0 ? 0 : ret
;
619 void xml_error_handler(void *ctx
, const char *format
, ...)
625 va_start(args
, format
);
626 ret
= vasprintf(&errMsg
, format
, args
);
629 ERR("String allocation failed in xml error handler");
633 fprintf(stderr
, "XML Error: %s", errMsg
);
638 void fini_session_config_validation_ctx(
639 struct session_config_validation_ctx
*ctx
)
641 if (ctx
->parser_ctx
) {
642 xmlSchemaFreeParserCtxt(ctx
->parser_ctx
);
646 xmlSchemaFree(ctx
->schema
);
649 if (ctx
->schema_validation_ctx
) {
650 xmlSchemaFreeValidCtxt(ctx
->schema_validation_ctx
);
653 memset(ctx
, 0, sizeof(struct session_config_validation_ctx
));
657 char *get_session_config_xsd_path()
660 const char *base_path
= lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV
);
661 size_t base_path_len
;
665 base_path
= DEFAULT_SESSION_CONFIG_XSD_PATH
;
668 base_path_len
= strlen(base_path
);
669 max_path_len
= base_path_len
+
670 sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME
) + 1;
671 xsd_path
= zmalloc(max_path_len
);
676 strncpy(xsd_path
, base_path
, max_path_len
);
677 if (xsd_path
[base_path_len
- 1] != '/') {
678 xsd_path
[base_path_len
++] = '/';
681 strncpy(xsd_path
+ base_path_len
, DEFAULT_SESSION_CONFIG_XSD_FILENAME
,
682 max_path_len
- base_path_len
);
688 int init_session_config_validation_ctx(
689 struct session_config_validation_ctx
*ctx
)
692 char *xsd_path
= get_session_config_xsd_path();
695 ret
= -LTTNG_ERR_NOMEM
;
699 ctx
->parser_ctx
= xmlSchemaNewParserCtxt(xsd_path
);
700 if (!ctx
->parser_ctx
) {
701 ERR("XSD parser context creation failed");
702 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
705 xmlSchemaSetParserErrors(ctx
->parser_ctx
, xml_error_handler
,
706 xml_error_handler
, NULL
);
708 ctx
->schema
= xmlSchemaParse(ctx
->parser_ctx
);
710 ERR("XSD parsing failed");
711 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
715 ctx
->schema_validation_ctx
= xmlSchemaNewValidCtxt(ctx
->schema
);
716 if (!ctx
->schema_validation_ctx
) {
717 ERR("XSD validation context creation failed");
718 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
722 xmlSchemaSetValidErrors(ctx
->schema_validation_ctx
, xml_error_handler
,
723 xml_error_handler
, NULL
);
728 fini_session_config_validation_ctx(ctx
);
736 int parse_uint(xmlChar
*str
, uint64_t *val
)
746 *val
= strtoull((const char *) str
, &endptr
, 10);
747 if (!endptr
|| *endptr
) {
758 int parse_int(xmlChar
*str
, int64_t *val
)
768 *val
= strtoll((const char *) str
, &endptr
, 10);
769 if (!endptr
|| *endptr
) {
780 int parse_bool(xmlChar
*str
, int *val
)
789 if (!strcmp((const char *) str
, config_xml_true
)) {
791 } else if (!strcmp((const char *) str
, config_xml_false
)) {
794 WARN("Invalid boolean value encoutered (%s).",
803 int get_domain_type(xmlChar
*domain
)
811 if (!strcmp((char *) domain
, config_domain_type_kernel
)) {
812 ret
= LTTNG_DOMAIN_KERNEL
;
813 } else if (!strcmp((char *) domain
, config_domain_type_ust
)) {
814 ret
= LTTNG_DOMAIN_UST
;
815 } else if (!strcmp((char *) domain
, config_domain_type_jul
)) {
816 ret
= LTTNG_DOMAIN_JUL
;
817 } else if (!strcmp((char *) domain
, config_domain_type_log4j
)) {
818 ret
= LTTNG_DOMAIN_LOG4J
;
819 } else if (!strcmp((char *) domain
, config_domain_type_python
)) {
820 ret
= LTTNG_DOMAIN_PYTHON
;
831 int get_buffer_type(xmlChar
*buffer_type
)
839 if (!strcmp((char *) buffer_type
, config_buffer_type_global
)) {
840 ret
= LTTNG_BUFFER_GLOBAL
;
841 } else if (!strcmp((char *) buffer_type
, config_buffer_type_per_uid
)) {
842 ret
= LTTNG_BUFFER_PER_UID
;
843 } else if (!strcmp((char *) buffer_type
, config_buffer_type_per_pid
)) {
844 ret
= LTTNG_BUFFER_PER_PID
;
855 int get_overwrite_mode(xmlChar
*overwrite_mode
)
859 if (!overwrite_mode
) {
863 if (!strcmp((char *) overwrite_mode
, config_overwrite_mode_overwrite
)) {
865 } else if (!strcmp((char *) overwrite_mode
,
866 config_overwrite_mode_discard
)) {
878 int get_output_type(xmlChar
*output_type
)
886 if (!strcmp((char *) output_type
, config_output_type_mmap
)) {
887 ret
= LTTNG_EVENT_MMAP
;
888 } else if (!strcmp((char *) output_type
, config_output_type_splice
)) {
889 ret
= LTTNG_EVENT_SPLICE
;
900 int get_event_type(xmlChar
*event_type
)
908 if (!strcmp((char *) event_type
, config_event_type_all
)) {
909 ret
= LTTNG_EVENT_ALL
;
910 } else if (!strcmp((char *) event_type
, config_event_type_tracepoint
)) {
911 ret
= LTTNG_EVENT_TRACEPOINT
;
912 } else if (!strcmp((char *) event_type
, config_event_type_probe
)) {
913 ret
= LTTNG_EVENT_PROBE
;
914 } else if (!strcmp((char *) event_type
, config_event_type_function
)) {
915 ret
= LTTNG_EVENT_FUNCTION
;
916 } else if (!strcmp((char *) event_type
,
917 config_event_type_function_entry
)) {
918 ret
= LTTNG_EVENT_FUNCTION_ENTRY
;
919 } else if (!strcmp((char *) event_type
, config_event_type_noop
)) {
920 ret
= LTTNG_EVENT_NOOP
;
921 } else if (!strcmp((char *) event_type
, config_event_type_syscall
)) {
922 ret
= LTTNG_EVENT_SYSCALL
;
933 int get_loglevel_type(xmlChar
*loglevel_type
)
937 if (!loglevel_type
) {
941 if (!strcmp((char *) loglevel_type
, config_loglevel_type_all
)) {
942 ret
= LTTNG_EVENT_LOGLEVEL_ALL
;
943 } else if (!strcmp((char *) loglevel_type
,
944 config_loglevel_type_range
)) {
945 ret
= LTTNG_EVENT_LOGLEVEL_RANGE
;
946 } else if (!strcmp((char *) loglevel_type
,
947 config_loglevel_type_single
)) {
948 ret
= LTTNG_EVENT_LOGLEVEL_SINGLE
;
959 * Return the context type or -1 on error.
962 int get_context_type(xmlChar
*context_type
)
970 if (!strcmp((char *) context_type
, config_event_context_pid
)) {
971 ret
= LTTNG_EVENT_CONTEXT_PID
;
972 } else if (!strcmp((char *) context_type
,
973 config_event_context_procname
)) {
974 ret
= LTTNG_EVENT_CONTEXT_PROCNAME
;
975 } else if (!strcmp((char *) context_type
,
976 config_event_context_prio
)) {
977 ret
= LTTNG_EVENT_CONTEXT_PRIO
;
978 } else if (!strcmp((char *) context_type
,
979 config_event_context_nice
)) {
980 ret
= LTTNG_EVENT_CONTEXT_NICE
;
981 } else if (!strcmp((char *) context_type
,
982 config_event_context_vpid
)) {
983 ret
= LTTNG_EVENT_CONTEXT_VPID
;
984 } else if (!strcmp((char *) context_type
,
985 config_event_context_tid
)) {
986 ret
= LTTNG_EVENT_CONTEXT_TID
;
987 } else if (!strcmp((char *) context_type
,
988 config_event_context_vtid
)) {
989 ret
= LTTNG_EVENT_CONTEXT_VTID
;
990 } else if (!strcmp((char *) context_type
,
991 config_event_context_ppid
)) {
992 ret
= LTTNG_EVENT_CONTEXT_PPID
;
993 } else if (!strcmp((char *) context_type
,
994 config_event_context_vppid
)) {
995 ret
= LTTNG_EVENT_CONTEXT_VPPID
;
996 } else if (!strcmp((char *) context_type
,
997 config_event_context_pthread_id
)) {
998 ret
= LTTNG_EVENT_CONTEXT_PTHREAD_ID
;
999 } else if (!strcmp((char *) context_type
,
1000 config_event_context_hostname
)) {
1001 ret
= LTTNG_EVENT_CONTEXT_HOSTNAME
;
1002 } else if (!strcmp((char *) context_type
,
1003 config_event_context_ip
)) {
1004 ret
= LTTNG_EVENT_CONTEXT_IP
;
1005 } else if (!strcmp((char *) context_type
,
1006 config_event_context_interruptible
)) {
1007 ret
= LTTNG_EVENT_CONTEXT_INTERRUPTIBLE
;
1008 } else if (!strcmp((char *) context_type
,
1009 config_event_context_preemptible
)) {
1010 ret
= LTTNG_EVENT_CONTEXT_PREEMPTIBLE
;
1011 } else if (!strcmp((char *) context_type
,
1012 config_event_context_need_reschedule
)) {
1013 ret
= LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE
;
1014 } else if (!strcmp((char *) context_type
,
1015 config_event_context_migratable
)) {
1016 ret
= LTTNG_EVENT_CONTEXT_MIGRATABLE
;
1027 int init_domain(xmlNodePtr domain_node
, struct lttng_domain
*domain
)
1032 for (node
= xmlFirstElementChild(domain_node
); node
;
1033 node
= xmlNextElementSibling(node
)) {
1034 if (!strcmp((const char *) node
->name
, config_element_type
)) {
1036 xmlChar
*node_content
= xmlNodeGetContent(node
);
1037 if (!node_content
) {
1038 ret
= -LTTNG_ERR_NOMEM
;
1042 ret
= get_domain_type(node_content
);
1045 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1050 } else if (!strcmp((const char *) node
->name
,
1051 config_element_buffer_type
)) {
1053 xmlChar
*node_content
= xmlNodeGetContent(node
);
1054 if (!node_content
) {
1055 ret
= -LTTNG_ERR_NOMEM
;
1059 ret
= get_buffer_type(node_content
);
1062 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1066 domain
->buf_type
= ret
;
1075 int get_net_output_uris(xmlNodePtr net_output_node
, char **control_uri
,
1080 for (node
= xmlFirstElementChild(net_output_node
); node
;
1081 node
= xmlNextElementSibling(node
)) {
1082 if (!strcmp((const char *) node
->name
, config_element_control_uri
)) {
1084 *control_uri
= (char *) xmlNodeGetContent(node
);
1085 if (!*control_uri
) {
1090 *data_uri
= (char *) xmlNodeGetContent(node
);
1097 return *control_uri
|| *data_uri
? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1101 int process_consumer_output(xmlNodePtr consumer_output_node
,
1102 struct consumer_output
*output
)
1109 for (node
= xmlFirstElementChild(consumer_output_node
); node
;
1110 node
= xmlNextElementSibling(node
)) {
1111 if (!strcmp((const char *) node
->name
, config_element_enabled
)) {
1112 xmlChar
*enabled_str
= xmlNodeGetContent(node
);
1116 ret
= -LTTNG_ERR_NOMEM
;
1120 ret
= parse_bool(enabled_str
, &output
->enabled
);
1126 xmlNodePtr output_type_node
;
1129 output_type_node
= xmlFirstElementChild(node
);
1130 if (!output_type_node
) {
1131 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1135 if (!strcmp((const char *) output_type_node
->name
,
1136 config_element_path
)) {
1138 output
->path
= (char *) xmlNodeGetContent(output_type_node
);
1139 if (!output
->path
) {
1140 ret
= -LTTNG_ERR_NOMEM
;
1145 ret
= get_net_output_uris(output_type_node
,
1146 &output
->control_uri
, &output
->data_uri
);
1158 free(output
->control_uri
);
1159 free(output
->data_uri
);
1160 memset(output
, 0, sizeof(struct consumer_output
));
1166 int create_session_net_output(const char *name
, const char *control_uri
,
1167 const char *data_uri
)
1170 struct lttng_handle
*handle
;
1171 const char *uri
= NULL
;
1175 handle
= lttng_create_handle(name
, NULL
);
1177 ret
= -LTTNG_ERR_NOMEM
;
1181 if (!control_uri
|| !data_uri
) {
1182 uri
= control_uri
? control_uri
: data_uri
;
1187 ret
= lttng_set_consumer_url(handle
, control_uri
, data_uri
);
1188 lttng_destroy_handle(handle
);
1194 int create_snapshot_session(const char *session_name
, xmlNodePtr output_node
)
1197 xmlNodePtr node
= NULL
;
1198 xmlNodePtr snapshot_output_list_node
;
1199 xmlNodePtr snapshot_output_node
;
1201 assert(session_name
);
1203 ret
= lttng_create_session_snapshot(session_name
, NULL
);
1212 snapshot_output_list_node
= xmlFirstElementChild(output_node
);
1214 /* Parse and create snapshot outputs */
1216 for (snapshot_output_node
=
1217 xmlFirstElementChild(snapshot_output_list_node
);
1218 snapshot_output_node
; snapshot_output_node
=
1219 xmlNextElementSibling(snapshot_output_node
)) {
1221 uint64_t max_size
= UINT64_MAX
;
1222 struct consumer_output output
= { 0 };
1223 struct lttng_snapshot_output
*snapshot_output
= NULL
;
1225 for (node
= xmlFirstElementChild(snapshot_output_node
); node
;
1226 node
= xmlNextElementSibling(node
)) {
1227 if (!strcmp((const char *) node
->name
,
1228 config_element_name
)) {
1230 name
= (char *) xmlNodeGetContent(node
);
1232 ret
= -LTTNG_ERR_NOMEM
;
1233 goto error_snapshot_output
;
1235 } else if (!strcmp((const char *) node
->name
,
1236 config_element_max_size
)) {
1237 xmlChar
*content
= xmlNodeGetContent(node
);
1241 ret
= -LTTNG_ERR_NOMEM
;
1242 goto error_snapshot_output
;
1244 ret
= parse_uint(content
, &max_size
);
1247 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1248 goto error_snapshot_output
;
1251 /* consumer_output */
1252 ret
= process_consumer_output(node
, &output
);
1254 goto error_snapshot_output
;
1259 snapshot_output
= lttng_snapshot_output_create();
1260 if (!snapshot_output
) {
1261 ret
= -LTTNG_ERR_NOMEM
;
1262 goto error_snapshot_output
;
1265 ret
= lttng_snapshot_output_set_name(name
, snapshot_output
);
1267 goto error_snapshot_output
;
1270 ret
= lttng_snapshot_output_set_size(max_size
, snapshot_output
);
1272 goto error_snapshot_output
;
1276 ret
= lttng_snapshot_output_set_ctrl_url(output
.path
,
1279 goto error_snapshot_output
;
1282 if (output
.control_uri
) {
1283 ret
= lttng_snapshot_output_set_ctrl_url(output
.control_uri
,
1286 goto error_snapshot_output
;
1290 if (output
.data_uri
) {
1291 ret
= lttng_snapshot_output_set_data_url(output
.data_uri
,
1294 goto error_snapshot_output
;
1299 ret
= lttng_snapshot_add_output(session_name
, snapshot_output
);
1300 error_snapshot_output
:
1303 free(output
.control_uri
);
1304 free(output
.data_uri
);
1305 lttng_snapshot_output_destroy(snapshot_output
);
1315 int create_session(const char *name
,
1316 struct lttng_domain
*kernel_domain
,
1317 struct lttng_domain
*ust_domain
,
1318 struct lttng_domain
*jul_domain
,
1319 struct lttng_domain
*log4j_domain
,
1320 xmlNodePtr output_node
,
1321 uint64_t live_timer_interval
)
1324 struct consumer_output output
= { 0 };
1325 xmlNodePtr consumer_output_node
;
1330 consumer_output_node
= xmlFirstElementChild(output_node
);
1331 if (!consumer_output_node
) {
1332 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1336 if (strcmp((const char *) consumer_output_node
->name
,
1337 config_element_consumer_output
)) {
1338 WARN("Invalid output type, expected %s node",
1339 config_element_consumer_output
);
1340 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1344 ret
= process_consumer_output(consumer_output_node
, &output
);
1350 if (live_timer_interval
!= UINT64_MAX
&&
1351 !output
.control_uri
&& !output
.data_uri
) {
1352 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1356 if (output
.control_uri
|| output
.data_uri
) {
1357 /* network destination */
1358 if (live_timer_interval
&& live_timer_interval
!= UINT64_MAX
) {
1360 * URLs are provided for sure since the test above make sure that
1361 * with a live timer the data and control URIs are provided. So,
1362 * NULL is passed here and will be set right after.
1364 ret
= lttng_create_session_live(name
, NULL
, live_timer_interval
);
1366 ret
= lttng_create_session(name
, NULL
);
1372 ret
= create_session_net_output(name
, 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
, const enum process_event_node_phase phase
)
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 free(filter_expression
);
1618 filter_expression
= strdup((char *) content
);
1620 if (!filter_expression
) {
1621 ret
= -LTTNG_ERR_NOMEM
;
1624 } else if (!strcmp((const char *) node
->name
,
1625 config_element_exclusions
)) {
1626 xmlNodePtr exclusion_node
;
1627 int exclusion_index
= 0;
1632 * Exclusions has already been initialized,
1635 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1639 exclusion_count
= xmlChildElementCount(node
);
1640 if (!exclusion_count
) {
1644 exclusions
= zmalloc(exclusion_count
* sizeof(char *));
1646 exclusion_count
= 0;
1647 ret
= -LTTNG_ERR_NOMEM
;
1651 for (exclusion_node
= xmlFirstElementChild(node
); exclusion_node
;
1652 exclusion_node
= xmlNextElementSibling(exclusion_node
)) {
1654 xmlNodeGetContent(exclusion_node
);
1657 ret
= -LTTNG_ERR_NOMEM
;
1661 exclusions
[exclusion_index
] = strdup((const char *) content
);
1663 if (!exclusions
[exclusion_index
]) {
1664 ret
= -LTTNG_ERR_NOMEM
;
1670 event
.exclusion
= 1;
1671 } else if (!strcmp((const char *) node
->name
,
1672 config_element_attributes
)) {
1673 xmlNodePtr attribute_node
= xmlFirstElementChild(node
);
1676 if (!attribute_node
) {
1677 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1681 if (!strcmp((const char *) node
->name
,
1682 config_element_probe_attributes
)) {
1683 xmlNodePtr probe_attribute_node
;
1685 /* probe_attributes */
1686 for (probe_attribute_node
=
1687 xmlFirstElementChild(attribute_node
); probe_attribute_node
;
1688 probe_attribute_node
= xmlNextElementSibling(
1689 probe_attribute_node
)) {
1691 ret
= process_probe_attribute_node(probe_attribute_node
,
1700 xmlNodePtr symbol_node
= xmlFirstElementChild(attribute_node
);
1702 /* function_attributes */
1703 content
= xmlNodeGetContent(symbol_node
);
1705 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1709 sym_len
= strlen((char *) content
);
1710 if (sym_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1711 WARN("Function name too long.");
1712 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1717 strncpy(event
.attr
.ftrace
.symbol_name
, (char *) content
,
1724 if ((event
.enabled
&& phase
== ENABLE
) || phase
== CREATION
) {
1725 ret
= lttng_enable_event_with_exclusions(handle
, &event
, channel_name
,
1726 filter_expression
, exclusion_count
, exclusions
);
1728 WARN("Enabling event (name:%s) on load failed.", event
.name
);
1729 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1734 for (i
= 0; i
< exclusion_count
; i
++) {
1735 free(exclusions
[i
]);
1739 free(filter_expression
);
1744 int process_events_node(xmlNodePtr events_node
, struct lttng_handle
*handle
,
1745 const char *channel_name
)
1748 struct lttng_event event
;
1751 assert(events_node
);
1753 assert(channel_name
);
1755 for (node
= xmlFirstElementChild(events_node
); node
;
1756 node
= xmlNextElementSibling(node
)) {
1757 ret
= process_event_node(node
, handle
, channel_name
, CREATION
);
1764 * Disable all events to enable only the necessary events.
1765 * Limitations regarding lttng_disable_events and tuple descriptor
1766 * force this approach.
1768 memset(&event
, 0, sizeof(event
));
1769 event
.loglevel
= -1;
1770 event
.type
= LTTNG_EVENT_ALL
;
1771 ret
= lttng_disable_event_ext(handle
, &event
, channel_name
, NULL
);
1776 for (node
= xmlFirstElementChild(events_node
); node
;
1777 node
= xmlNextElementSibling(node
)) {
1778 ret
= process_event_node(node
, handle
, channel_name
, ENABLE
);
1789 int process_channel_attr_node(xmlNodePtr attr_node
,
1790 struct lttng_channel
*channel
, xmlNodePtr
*contexts_node
,
1791 xmlNodePtr
*events_node
)
1797 assert(contexts_node
);
1798 assert(events_node
);
1800 if (!strcmp((const char *) attr_node
->name
, config_element_name
)) {
1805 content
= xmlNodeGetContent(attr_node
);
1807 ret
= -LTTNG_ERR_NOMEM
;
1811 name_len
= strlen((char *) content
);
1812 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1813 WARN("Channel name too long.");
1814 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1819 strncpy(channel
->name
, (const char *) content
, name_len
);
1821 } else if (!strcmp((const char *) attr_node
->name
,
1822 config_element_enabled
)) {
1827 content
= xmlNodeGetContent(attr_node
);
1829 ret
= -LTTNG_ERR_NOMEM
;
1833 ret
= parse_bool(content
, &enabled
);
1836 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1840 channel
->enabled
= enabled
;
1841 } else if (!strcmp((const char *) attr_node
->name
,
1842 config_element_overwrite_mode
)) {
1845 /* overwrite_mode */
1846 content
= xmlNodeGetContent(attr_node
);
1848 ret
= -LTTNG_ERR_NOMEM
;
1852 ret
= get_overwrite_mode(content
);
1855 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1859 channel
->attr
.overwrite
= ret
;
1860 } else if (!strcmp((const char *) attr_node
->name
,
1861 config_element_subbuf_size
)) {
1864 /* subbuffer_size */
1865 content
= xmlNodeGetContent(attr_node
);
1867 ret
= -LTTNG_ERR_NOMEM
;
1871 ret
= parse_uint(content
, &channel
->attr
.subbuf_size
);
1874 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1877 } else if (!strcmp((const char *) attr_node
->name
,
1878 config_element_num_subbuf
)) {
1881 /* subbuffer_count */
1882 content
= xmlNodeGetContent(attr_node
);
1884 ret
= -LTTNG_ERR_NOMEM
;
1888 ret
= parse_uint(content
, &channel
->attr
.num_subbuf
);
1891 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1894 } else if (!strcmp((const char *) attr_node
->name
,
1895 config_element_switch_timer_interval
)) {
1897 uint64_t switch_timer_interval
= 0;
1899 /* switch_timer_interval */
1900 content
= xmlNodeGetContent(attr_node
);
1902 ret
= -LTTNG_ERR_NOMEM
;
1906 ret
= parse_uint(content
, &switch_timer_interval
);
1909 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1913 if (switch_timer_interval
> UINT_MAX
) {
1914 WARN("switch_timer_interval out of range.");
1915 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1919 channel
->attr
.switch_timer_interval
=
1920 switch_timer_interval
;
1921 } else if (!strcmp((const char *) attr_node
->name
,
1922 config_element_read_timer_interval
)) {
1924 uint64_t read_timer_interval
= 0;
1926 /* read_timer_interval */
1927 content
= xmlNodeGetContent(attr_node
);
1929 ret
= -LTTNG_ERR_NOMEM
;
1933 ret
= parse_uint(content
, &read_timer_interval
);
1936 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1940 if (read_timer_interval
> UINT_MAX
) {
1941 WARN("read_timer_interval out of range.");
1942 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1946 channel
->attr
.read_timer_interval
=
1947 read_timer_interval
;
1948 } else if (!strcmp((const char *) attr_node
->name
,
1949 config_element_output_type
)) {
1953 content
= xmlNodeGetContent(attr_node
);
1955 ret
= -LTTNG_ERR_NOMEM
;
1959 ret
= get_output_type(content
);
1962 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1966 channel
->attr
.output
= ret
;
1967 } else if (!strcmp((const char *) attr_node
->name
,
1968 config_element_tracefile_size
)) {
1971 /* tracefile_size */
1972 content
= xmlNodeGetContent(attr_node
);
1974 ret
= -LTTNG_ERR_NOMEM
;
1978 ret
= parse_uint(content
, &channel
->attr
.tracefile_size
);
1981 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1984 } else if (!strcmp((const char *) attr_node
->name
,
1985 config_element_tracefile_count
)) {
1988 /* tracefile_count */
1989 content
= xmlNodeGetContent(attr_node
);
1991 ret
= -LTTNG_ERR_NOMEM
;
1995 ret
= parse_uint(content
, &channel
->attr
.tracefile_count
);
1998 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2001 } else if (!strcmp((const char *) attr_node
->name
,
2002 config_element_live_timer_interval
)) {
2004 uint64_t live_timer_interval
= 0;
2006 /* live_timer_interval */
2007 content
= xmlNodeGetContent(attr_node
);
2009 ret
= -LTTNG_ERR_NOMEM
;
2013 ret
= parse_uint(content
, &live_timer_interval
);
2016 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2020 if (live_timer_interval
> UINT_MAX
) {
2021 WARN("live_timer_interval out of range.");
2022 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2026 channel
->attr
.live_timer_interval
=
2027 live_timer_interval
;
2028 } else if (!strcmp((const char *) attr_node
->name
,
2029 config_element_events
)) {
2031 *events_node
= attr_node
;
2034 *contexts_node
= attr_node
;
2042 int process_context_node(xmlNodePtr context_node
,
2043 struct lttng_handle
*handle
, const char *channel_name
)
2046 struct lttng_event_context context
;
2047 xmlNodePtr context_child_node
= xmlFirstElementChild(context_node
);
2050 assert(channel_name
);
2052 if (!context_child_node
) {
2053 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2057 memset(&context
, 0, sizeof(context
));
2059 if (!strcmp((const char *) context_child_node
->name
,
2060 config_element_type
)) {
2062 xmlChar
*content
= xmlNodeGetContent(context_child_node
);
2065 ret
= -LTTNG_ERR_NOMEM
;
2069 ret
= get_context_type(content
);
2072 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2077 } else if (!strcmp((const char *) context_child_node
->name
,
2078 config_element_context_perf
)) {
2080 xmlNodePtr perf_attr_node
;
2082 context
.ctx
= handle
->domain
.type
== LTTNG_DOMAIN_KERNEL
?
2083 LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER
:
2084 LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER
;
2085 for (perf_attr_node
= xmlFirstElementChild(context_child_node
);
2086 perf_attr_node
; perf_attr_node
=
2087 xmlNextElementSibling(perf_attr_node
)) {
2088 if (!strcmp((const char *) perf_attr_node
->name
,
2089 config_element_type
)) {
2094 content
= xmlNodeGetContent(perf_attr_node
);
2096 ret
= -LTTNG_ERR_NOMEM
;
2100 ret
= parse_uint(content
, &type
);
2103 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2107 if (type
> UINT32_MAX
) {
2108 WARN("perf context type out of range.");
2109 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2113 context
.u
.perf_counter
.type
= type
;
2114 } else if (!strcmp((const char *) perf_attr_node
->name
,
2115 config_element_config
)) {
2117 uint64_t config
= 0;
2120 content
= xmlNodeGetContent(perf_attr_node
);
2122 ret
= -LTTNG_ERR_NOMEM
;
2126 ret
= parse_uint(content
, &config
);
2129 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2133 context
.u
.perf_counter
.config
= config
;
2134 } else if (!strcmp((const char *) perf_attr_node
->name
,
2135 config_element_name
)) {
2140 content
= xmlNodeGetContent(perf_attr_node
);
2142 ret
= -LTTNG_ERR_NOMEM
;
2146 name_len
= strlen((char *) content
);
2147 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
2148 WARN("perf context name too long.");
2149 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2154 strncpy(context
.u
.perf_counter
.name
, (const char *) content
,
2159 } else if (!strcmp((const char *) context_child_node
->name
,
2160 config_element_context_app
)) {
2161 /* application context */
2162 xmlNodePtr app_ctx_node
;
2164 context
.ctx
= LTTNG_EVENT_CONTEXT_APP_CONTEXT
;
2165 for (app_ctx_node
= xmlFirstElementChild(context_child_node
);
2166 app_ctx_node
; app_ctx_node
=
2167 xmlNextElementSibling(app_ctx_node
)) {
2169 char **target
= strcmp(
2170 (const char *) app_ctx_node
->name
,
2171 config_element_context_app_provider_name
) == 0 ?
2172 &context
.u
.app_ctx
.provider_name
:
2173 &context
.u
.app_ctx
.ctx_name
;
2175 content
= xmlNodeGetContent(app_ctx_node
);
2177 ret
= -LTTNG_ERR_NOMEM
;
2181 *target
= (char *) content
;
2184 /* Unrecognized context type */
2185 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2189 ret
= lttng_add_context(handle
, &context
, NULL
, channel_name
);
2190 if (context
.ctx
== LTTNG_EVENT_CONTEXT_APP_CONTEXT
) {
2191 free(context
.u
.app_ctx
.provider_name
);
2192 free(context
.u
.app_ctx
.ctx_name
);
2199 int process_contexts_node(xmlNodePtr contexts_node
,
2200 struct lttng_handle
*handle
, const char *channel_name
)
2203 xmlNodePtr context_node
;
2205 for (context_node
= xmlFirstElementChild(contexts_node
); context_node
;
2206 context_node
= xmlNextElementSibling(context_node
)) {
2207 ret
= process_context_node(context_node
, handle
, channel_name
);
2217 int process_pid_tracker_node(xmlNodePtr pid_tracker_node
,
2218 struct lttng_handle
*handle
)
2221 xmlNodePtr targets_node
= NULL
;
2225 assert(pid_tracker_node
);
2226 /* get the targets node */
2227 for (node
= xmlFirstElementChild(pid_tracker_node
); node
;
2228 node
= xmlNextElementSibling(node
)) {
2229 if (!strcmp((const char *) node
->name
,
2230 config_element_targets
)) {
2231 targets_node
= node
;
2236 if (!targets_node
) {
2237 ret
= LTTNG_ERR_INVALID
;
2241 /* Go through all pid_target node */
2242 child
= xmlChildElementCount(targets_node
);
2244 /* The session is explicitly set to target nothing. */
2245 ret
= lttng_untrack_pid(handle
, -1);
2250 for (node
= xmlFirstElementChild(targets_node
); node
;
2251 node
= xmlNextElementSibling(node
)) {
2252 xmlNodePtr pid_target_node
= node
;
2254 /* get pid node and track it */
2255 for (node
= xmlFirstElementChild(pid_target_node
); node
;
2256 node
= xmlNextElementSibling(node
)) {
2257 if (!strcmp((const char *) node
->name
,
2258 config_element_pid
)) {
2260 xmlChar
*content
= NULL
;
2262 content
= xmlNodeGetContent(node
);
2264 ret
= LTTNG_ERR_LOAD_INVALID_CONFIG
;
2268 ret
= parse_int(content
, &pid
);
2271 ret
= LTTNG_ERR_LOAD_INVALID_CONFIG
;
2275 ret
= lttng_track_pid(handle
, (int) pid
);
2281 node
= pid_target_node
;
2290 int process_domain_node(xmlNodePtr domain_node
, const char *session_name
)
2293 struct lttng_domain domain
= { 0 };
2294 struct lttng_handle
*handle
= NULL
;
2295 xmlNodePtr channels_node
= NULL
;
2296 xmlNodePtr trackers_node
= NULL
;
2297 xmlNodePtr pid_tracker_node
= NULL
;
2300 assert(session_name
);
2302 ret
= init_domain(domain_node
, &domain
);
2307 handle
= lttng_create_handle(session_name
, &domain
);
2309 ret
= -LTTNG_ERR_NOMEM
;
2313 /* get the channels node */
2314 for (node
= xmlFirstElementChild(domain_node
); node
;
2315 node
= xmlNextElementSibling(node
)) {
2316 if (!strcmp((const char *) node
->name
,
2317 config_element_channels
)) {
2318 channels_node
= node
;
2323 if (!channels_node
) {
2327 /* create all channels */
2328 for (node
= xmlFirstElementChild(channels_node
); node
;
2329 node
= xmlNextElementSibling(node
)) {
2330 struct lttng_channel channel
;
2331 xmlNodePtr contexts_node
= NULL
;
2332 xmlNodePtr events_node
= NULL
;
2333 xmlNodePtr channel_attr_node
;
2335 memset(&channel
, 0, sizeof(channel
));
2336 lttng_channel_set_default_attr(&domain
, &channel
.attr
);
2338 for (channel_attr_node
= xmlFirstElementChild(node
);
2339 channel_attr_node
; channel_attr_node
=
2340 xmlNextElementSibling(channel_attr_node
)) {
2341 ret
= process_channel_attr_node(channel_attr_node
,
2342 &channel
, &contexts_node
, &events_node
);
2348 ret
= lttng_enable_channel(handle
, &channel
);
2353 ret
= process_events_node(events_node
, handle
, channel
.name
);
2358 ret
= process_contexts_node(contexts_node
, handle
,
2365 /* get the trackers node */
2366 for (node
= xmlFirstElementChild(domain_node
); node
;
2367 node
= xmlNextElementSibling(node
)) {
2368 if (!strcmp((const char *) node
->name
,
2369 config_element_trackers
)) {
2370 trackers_node
= node
;
2375 if (!trackers_node
) {
2379 for (node
= xmlFirstElementChild(trackers_node
); node
;
2380 node
= xmlNextElementSibling(node
)) {
2381 if (!strcmp((const char *)node
->name
,config_element_pid_tracker
)) {
2382 pid_tracker_node
= node
;
2383 ret
= process_pid_tracker_node(pid_tracker_node
, handle
);
2390 if (!pid_tracker_node
) {
2391 lttng_track_pid(handle
, -1);
2395 lttng_destroy_handle(handle
);
2400 int process_session_node(xmlNodePtr session_node
, const char *session_name
,
2403 int ret
, started
= -1, snapshot_mode
= -1;
2404 uint64_t live_timer_interval
= UINT64_MAX
;
2405 xmlChar
*name
= NULL
;
2406 xmlChar
*shm_path
= NULL
;
2407 xmlNodePtr domains_node
= NULL
;
2408 xmlNodePtr output_node
= NULL
;
2410 struct lttng_domain
*kernel_domain
= NULL
;
2411 struct lttng_domain
*ust_domain
= NULL
;
2412 struct lttng_domain
*jul_domain
= NULL
;
2413 struct lttng_domain
*log4j_domain
= NULL
;
2414 struct lttng_domain
*python_domain
= NULL
;
2416 for (node
= xmlFirstElementChild(session_node
); node
;
2417 node
= xmlNextElementSibling(node
)) {
2418 if (!name
&& !strcmp((const char *) node
->name
,
2419 config_element_name
)) {
2421 xmlChar
*node_content
= xmlNodeGetContent(node
);
2422 if (!node_content
) {
2423 ret
= -LTTNG_ERR_NOMEM
;
2427 name
= node_content
;
2428 } else if (!domains_node
&& !strcmp((const char *) node
->name
,
2429 config_element_domains
)) {
2431 domains_node
= node
;
2432 } else if (started
== -1 && !strcmp((const char *) node
->name
,
2433 config_element_started
)) {
2435 xmlChar
*node_content
= xmlNodeGetContent(node
);
2436 if (!node_content
) {
2437 ret
= -LTTNG_ERR_NOMEM
;
2441 ret
= parse_bool(node_content
, &started
);
2444 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2447 } else if (!output_node
&& !strcmp((const char *) node
->name
,
2448 config_element_output
)) {
2451 } else if (!shm_path
&& !strcmp((const char *) node
->name
,
2452 config_element_shared_memory_path
)) {
2453 /* shared memory path */
2454 xmlChar
*node_content
= xmlNodeGetContent(node
);
2455 if (!node_content
) {
2456 ret
= -LTTNG_ERR_NOMEM
;
2460 shm_path
= node_content
;
2462 /* attributes, snapshot_mode or live_timer_interval */
2463 xmlNodePtr attributes_child
=
2464 xmlFirstElementChild(node
);
2466 if (!strcmp((const char *) attributes_child
->name
,
2467 config_element_snapshot_mode
)) {
2469 xmlChar
*snapshot_mode_content
=
2470 xmlNodeGetContent(attributes_child
);
2471 if (!snapshot_mode_content
) {
2472 ret
= -LTTNG_ERR_NOMEM
;
2476 ret
= parse_bool(snapshot_mode_content
, &snapshot_mode
);
2477 free(snapshot_mode_content
);
2479 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2483 /* live_timer_interval */
2484 xmlChar
*timer_interval_content
=
2485 xmlNodeGetContent(attributes_child
);
2486 if (!timer_interval_content
) {
2487 ret
= -LTTNG_ERR_NOMEM
;
2491 ret
= parse_uint(timer_interval_content
, &live_timer_interval
);
2492 free(timer_interval_content
);
2494 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2502 /* Mandatory attribute, as defined in the session XSD */
2503 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2507 if (session_name
&& strcmp((char *) name
, session_name
)) {
2508 /* This is not the session we are looking for */
2509 ret
= -LTTNG_ERR_NO_SESSION
;
2513 /* Init domains to create the session handles */
2514 for (node
= xmlFirstElementChild(domains_node
); node
;
2515 node
= xmlNextElementSibling(node
)) {
2516 struct lttng_domain
*domain
;
2518 domain
= zmalloc(sizeof(*domain
));
2520 ret
= -LTTNG_ERR_NOMEM
;
2524 ret
= init_domain(node
, domain
);
2526 goto domain_init_error
;
2529 switch (domain
->type
) {
2530 case LTTNG_DOMAIN_KERNEL
:
2531 if (kernel_domain
) {
2532 /* Same domain seen twice, invalid! */
2533 goto domain_init_error
;
2535 kernel_domain
= domain
;
2537 case LTTNG_DOMAIN_UST
:
2539 /* Same domain seen twice, invalid! */
2540 goto domain_init_error
;
2542 ust_domain
= domain
;
2544 case LTTNG_DOMAIN_JUL
:
2546 /* Same domain seen twice, invalid! */
2547 goto domain_init_error
;
2549 jul_domain
= domain
;
2551 case LTTNG_DOMAIN_LOG4J
:
2553 /* Same domain seen twice, invalid! */
2554 goto domain_init_error
;
2556 log4j_domain
= domain
;
2558 case LTTNG_DOMAIN_PYTHON
:
2559 if (python_domain
) {
2560 /* Same domain seen twice, invalid! */
2561 goto domain_init_error
;
2563 python_domain
= domain
;
2566 WARN("Invalid domain type");
2567 goto domain_init_error
;
2572 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2577 /* Destroy session if it exists */
2578 ret
= lttng_destroy_session((const char *) name
);
2579 if (ret
&& ret
!= -LTTNG_ERR_SESS_NOT_FOUND
) {
2580 ERR("Failed to destroy existing session.");
2585 /* Create session type depending on output type */
2586 if (snapshot_mode
&& snapshot_mode
!= -1) {
2587 ret
= create_snapshot_session((const char *) name
, output_node
);
2588 } else if (live_timer_interval
&&
2589 live_timer_interval
!= UINT64_MAX
) {
2590 ret
= create_session((const char *) name
, kernel_domain
,
2591 ust_domain
, jul_domain
, log4j_domain
,
2592 output_node
, live_timer_interval
);
2594 /* regular session */
2595 ret
= create_session((const char *) name
, kernel_domain
,
2596 ust_domain
, jul_domain
, log4j_domain
,
2597 output_node
, UINT64_MAX
);
2604 ret
= lttng_set_session_shm_path((const char *) name
,
2605 (const char *) shm_path
);
2611 for (node
= xmlFirstElementChild(domains_node
); node
;
2612 node
= xmlNextElementSibling(node
)) {
2613 ret
= process_domain_node(node
, (const char *) name
);
2620 ret
= lttng_start_tracing((const char *) name
);
2628 ERR("Failed to load session %s: %s", (const char *) name
,
2629 lttng_strerror(ret
));
2630 lttng_destroy_session((const char *) name
);
2634 free(kernel_domain
);
2638 free(python_domain
);
2645 * Return 1 if the given path is readable by the current UID or 0 if not.
2646 * Return -1 if the path is EPERM.
2648 static int validate_file_read_creds(const char *path
)
2654 /* Can we read the file. */
2655 ret
= access(path
, R_OK
);
2659 if (errno
== EACCES
) {
2670 int load_session_from_file(const char *path
, const char *session_name
,
2671 struct session_config_validation_ctx
*validation_ctx
, int override
)
2673 int ret
, session_found
= !session_name
;
2674 xmlDocPtr doc
= NULL
;
2675 xmlNodePtr sessions_node
;
2676 xmlNodePtr session_node
;
2679 assert(validation_ctx
);
2681 ret
= validate_file_read_creds(path
);
2684 ret
= -LTTNG_ERR_EPERM
;
2686 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2691 doc
= xmlParseFile(path
);
2693 ret
= -LTTNG_ERR_LOAD_IO_FAIL
;
2697 ret
= xmlSchemaValidateDoc(validation_ctx
->schema_validation_ctx
, doc
);
2699 ERR("Session configuration file validation failed");
2700 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2704 sessions_node
= xmlDocGetRootElement(doc
);
2705 if (!sessions_node
) {
2709 for (session_node
= xmlFirstElementChild(sessions_node
);
2710 session_node
; session_node
=
2711 xmlNextElementSibling(session_node
)) {
2712 ret
= process_session_node(session_node
,
2713 session_name
, override
);
2714 if (session_name
&& ret
== 0) {
2715 /* Target session found and loaded */
2723 ret
= session_found
? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT
;
2729 int load_session_from_document(struct config_document
*document
, const char *session_name
,
2730 struct session_config_validation_ctx
*validation_ctx
, int override
)
2732 int ret
, session_found
= !session_name
;
2733 xmlNodePtr sessions_node
;
2734 xmlNodePtr session_node
;
2736 assert(validation_ctx
);
2738 ret
= xmlSchemaValidateDoc(validation_ctx
->schema_validation_ctx
, document
->document
);
2740 ERR("Session configuration file validation failed");
2741 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2745 sessions_node
= xmlDocGetRootElement(document
->document
);
2746 if (!sessions_node
) {
2750 for (session_node
= xmlFirstElementChild(sessions_node
);
2751 session_node
; session_node
=
2752 xmlNextElementSibling(session_node
)) {
2753 ret
= process_session_node(session_node
,
2754 session_name
, override
);
2755 if (session_name
&& ret
== 0) {
2756 /* Target session found and loaded */
2763 ret
= session_found
? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT
;
2768 /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */
2770 struct dirent
*alloc_dirent(const char *path
)
2774 struct dirent
*entry
;
2776 name_max
= pathconf(path
, _PC_NAME_MAX
);
2777 if (name_max
== -1) {
2778 name_max
= PATH_MAX
;
2780 len
= offsetof(struct dirent
, d_name
) + name_max
+ 1;
2781 entry
= zmalloc(len
);
2786 int load_session_from_path(const char *path
, const char *session_name
,
2787 struct session_config_validation_ctx
*validation_ctx
, int override
)
2789 int ret
, session_found
= !session_name
;
2790 DIR *directory
= NULL
;
2793 assert(validation_ctx
);
2795 directory
= opendir(path
);
2799 /* Try the file loading. */
2802 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2805 ret
= -LTTNG_ERR_LOAD_IO_FAIL
;
2810 struct dirent
*entry
;
2811 struct dirent
*result
;
2812 char *file_path
= NULL
;
2813 size_t path_len
= strlen(path
);
2815 if (path_len
>= PATH_MAX
) {
2816 ret
= -LTTNG_ERR_INVALID
;
2820 entry
= alloc_dirent(path
);
2822 ret
= -LTTNG_ERR_NOMEM
;
2826 file_path
= zmalloc(PATH_MAX
);
2828 ret
= -LTTNG_ERR_NOMEM
;
2833 strncpy(file_path
, path
, path_len
);
2834 if (file_path
[path_len
- 1] != '/') {
2835 file_path
[path_len
++] = '/';
2839 /* Search for *.lttng files */
2840 while (!readdir_r(directory
, entry
, &result
) && result
) {
2841 size_t file_name_len
= strlen(result
->d_name
);
2843 if (file_name_len
<=
2844 sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
)) {
2848 if (path_len
+ file_name_len
>= PATH_MAX
) {
2852 if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
,
2853 result
->d_name
+ file_name_len
- sizeof(
2854 DEFAULT_SESSION_CONFIG_FILE_EXTENSION
) + 1)) {
2858 strncpy(file_path
+ path_len
, result
->d_name
, file_name_len
);
2859 file_path
[path_len
+ file_name_len
] = '\0';
2861 ret
= load_session_from_file(file_path
, session_name
,
2862 validation_ctx
, override
);
2863 if (session_name
&& !ret
) {
2872 ret
= load_session_from_file(path
, session_name
,
2873 validation_ctx
, override
);
2883 if (closedir(directory
)) {
2888 if (session_found
) {
2896 * Validate that the given path's credentials and the current process have the
2897 * same UID. If so, return 1 else return 0 if it does NOT match.
2899 static int validate_path_creds(const char *path
)
2901 int ret
, uid
= getuid();
2910 ret
= stat(path
, &buf
);
2912 if (errno
!= ENOENT
) {
2915 ret
= -LTTNG_ERR_INVALID
;
2919 if (buf
.st_uid
!= uid
) {
2930 int config_load_session(const char *path
, const char *session_name
,
2931 int override
, unsigned int autoload
)
2934 bool session_loaded
= false;
2935 const char *path_ptr
= NULL
;
2936 struct session_config_validation_ctx validation_ctx
= { 0 };
2938 ret
= init_session_config_validation_ctx(&validation_ctx
);
2945 const char *sys_path
;
2948 home_path
= utils_get_home_dir();
2950 char path
[PATH_MAX
];
2953 * Try user session configuration path. Ignore error here so we can
2954 * continue loading the system wide sessions.
2957 ret
= snprintf(path
, sizeof(path
),
2958 DEFAULT_SESSION_HOME_CONFIGPATH
"/"
2959 DEFAULT_SESSION_CONFIG_AUTOLOAD
, home_path
);
2961 PERROR("snprintf session autoload home config path");
2966 * Credentials are only validated for the autoload in order to
2967 * avoid any user session daemon to try to load kernel sessions
2968 * automatically and failing all the times.
2970 ret
= validate_path_creds(path
);
2975 ret
= snprintf(path
, sizeof(path
),
2976 DEFAULT_SESSION_HOME_CONFIGPATH
, home_path
);
2978 PERROR("snprintf session home config path");
2984 ret
= load_session_from_path(path_ptr
, session_name
,
2985 &validation_ctx
, override
);
2986 if (ret
&& ret
!= -LTTNG_ERR_LOAD_SESSION_NOENT
) {
2990 * Continue even if the session was found since we have to try
2991 * the system wide sessions.
2993 session_loaded
= true;
2997 /* Reset path pointer for the system wide dir. */
3000 /* Try system wide configuration directory. */
3002 sys_path
= DEFAULT_SESSION_SYSTEM_CONFIGPATH
"/"
3003 DEFAULT_SESSION_CONFIG_AUTOLOAD
;
3004 ret
= validate_path_creds(sys_path
);
3006 path_ptr
= sys_path
;
3009 sys_path
= DEFAULT_SESSION_SYSTEM_CONFIGPATH
;
3010 path_ptr
= sys_path
;
3014 ret
= load_session_from_path(path_ptr
, session_name
,
3015 &validation_ctx
, override
);
3017 session_loaded
= true;
3021 ret
= access(path
, F_OK
);
3026 ret
= -LTTNG_ERR_INVALID
;
3027 WARN("Session configuration path does not exist.");
3030 ret
= -LTTNG_ERR_EPERM
;
3033 ret
= -LTTNG_ERR_UNK
;
3039 ret
= load_session_from_path(path
, session_name
,
3040 &validation_ctx
, override
);
3043 fini_session_config_validation_ctx(&validation_ctx
);
3044 if (ret
== -LTTNG_ERR_LOAD_SESSION_NOENT
&& !session_name
&& !path
) {
3046 * Don't report an error if no sessions are found when called
3047 * without a session_name or a search path.
3052 if (session_loaded
&& ret
== -LTTNG_ERR_LOAD_SESSION_NOENT
) {
3053 /* A matching session was found in one of the search paths. */
3060 void __attribute__((destructor
)) session_config_exit(void)
3066 struct config_document
*config_document_get(const char *path
)
3069 struct config_document
*document
= NULL
;
3070 struct session_config_validation_ctx validation_ctx
= { 0 };
3074 ret
= access(path
, F_OK
);
3079 ERR("Configuration document path does not exist.");
3082 ERR("Configuration document permission denied.");
3085 ERR("Configuration document unknown error.");
3091 ret
= init_session_config_validation_ctx(&validation_ctx
);
3096 ret
= validate_file_read_creds(path
);
3099 ERR("Configuration document permission denied.");
3101 ERR("Configuration document does not exist.");
3106 document
= zmalloc(sizeof(struct config_document
));
3112 document
->document
= xmlParseFile(path
);
3113 if (!document
->document
) {
3114 ERR("Configuration document parsing failed.");
3118 ret
= xmlSchemaValidateDoc(validation_ctx
.schema_validation_ctx
,
3119 document
->document
);
3121 ERR("Session configuration file validation failed");
3128 xmlFreeDoc(document
->document
);
3134 void config_document_free(struct config_document
*document
)
3137 xmlFreeDoc(document
->document
);
3138 document
->document
= NULL
;
3143 int config_document_replace_element_value(struct config_document
*document
,
3144 const char *xpath
, const char *value
)
3147 int xpath_result_size
;
3149 xmlXPathContextPtr xpath_context
= NULL
;
3150 xmlXPathObjectPtr xpath_object
= NULL
;
3151 xmlNodeSetPtr xpath_result_set
= NULL
;
3152 xmlChar
*internal_xpath
= NULL
;
3153 xmlChar
*internal_value
= NULL
;
3159 internal_xpath
= encode_string(xpath
);
3160 if (!internal_xpath
) {
3161 ret
= -LTTNG_ERR_NOMEM
;
3162 ERR("Unable to encode xpath string");
3166 internal_value
= encode_string(value
);
3167 if (!internal_value
) {
3168 ret
= -LTTNG_ERR_NOMEM
;
3169 ERR("Unable to encode xpath replace value string");
3173 /* Initialize xpath context */
3174 xpath_context
= xmlXPathNewContext(document
->document
);
3175 if (!xpath_context
) {
3176 ret
= -LTTNG_ERR_NOMEM
;
3177 ERR("Unable to create xpath context");
3181 /* Evaluate de xpath expression */
3182 xpath_object
= xmlXPathEvalExpression(internal_xpath
, xpath_context
);
3183 if (!xpath_object
) {
3184 ret
= -LTTNG_ERR_CONFIG_INVALID_QUERY
;
3188 /* TODO: from here could be extracted and previopus could be a step in
3189 * subsequent operation, modify/substitute/delete node.
3191 xpath_result_set
= xpath_object
->nodesetval
;
3192 if (!xpath_result_set
) {
3193 ret
= -LTTNG_ERR_CONFIG_EMPTY_SET
;
3197 xpath_result_size
= xpath_result_set
->nodeNr
;
3200 * Reverse traversal since last element could be nested under parent
3201 * element present in the result set.
3203 for (int i
= xpath_result_size
- 1; i
>=0; i
--) {
3204 assert(xpath_result_set
->nodeTab
[i
]);
3205 xmlNodeSetContent(xpath_result_set
->nodeTab
[i
], internal_value
);
3208 * Libxml2 quirk regarding the freing and namesplace node see
3209 * libxml2 example and documentation for more details.
3211 if (xpath_result_set
->nodeTab
[i
]->type
!= XML_NAMESPACE_DECL
) {
3212 xpath_result_set
->nodeTab
[i
] = NULL
;
3217 xmlXPathFreeContext(xpath_context
);
3218 xmlXPathFreeObject(xpath_object
);
3219 xmlFree(internal_xpath
);
3220 xmlFree(internal_value
);
3225 int config_load_configuration_sessions(struct config_document
*document
,
3226 const char *session_name
, int override
)
3229 struct session_config_validation_ctx validation_ctx
= { 0 };
3231 ret
= init_session_config_validation_ctx(&validation_ctx
);
3235 ret
= load_session_from_document(document
, session_name
,
3236 &validation_ctx
, override
);
3242 int config_document_replace_element(struct config_document
*document
,
3243 const char *xpath
, const struct config_element
*element
)
3246 int xpath_result_size
;
3248 xmlXPathContextPtr xpath_context
= NULL
;
3249 xmlXPathObjectPtr xpath_object
= NULL
;
3250 xmlNodeSetPtr xpath_result_set
= NULL
;
3251 xmlChar
*internal_xpath
= NULL
;
3252 xmlNodePtr old_node
= NULL
;
3253 xmlNodePtr copy
= NULL
;
3258 assert(element
->element
);
3260 internal_xpath
= encode_string(xpath
);
3261 if (!internal_xpath
) {
3262 ret
= -LTTNG_ERR_NOMEM
;
3263 ERR("Unable to encode xpath string");
3267 /* Initialize xpath context */
3268 xpath_context
= xmlXPathNewContext(document
->document
);
3269 if (!xpath_context
) {
3270 ret
= -LTTNG_ERR_NOMEM
;
3271 ERR("Unable to create xpath context");
3275 /* Evaluate the xpath expression */
3276 xpath_object
= xmlXPathEvalExpression(internal_xpath
, xpath_context
);
3277 if (!xpath_object
) {
3278 ret
= -LTTNG_ERR_CONFIG_INVALID_QUERY
;
3282 xpath_result_set
= xpath_object
->nodesetval
;
3283 if (!xpath_result_set
) {
3284 ret
= -LTTNG_ERR_CONFIG_EMPTY_SET
;
3288 xpath_result_size
= xpath_result_set
->nodeNr
;
3290 if (xpath_result_size
> 1) {
3291 ret
= -LTTNG_ERR_CONFIG_INVALID_COUNT
;
3295 if (xpath_result_size
== 0) {
3296 ret
= -LTTNG_ERR_CONFIG_REPLACEMENT
;
3300 assert(xpath_result_set
->nodeTab
[0]);
3302 /* Do a copy of the element to ease caller memory management */
3303 copy
= xmlCopyNode(element
->element
, 1);
3305 ret
= -LTTNG_ERR_NOMEM
;
3306 ERR("Copy failed for node replacement");
3311 old_node
= xmlReplaceNode(xpath_result_set
->nodeTab
[0], copy
);
3313 ret
= -LTTNG_ERR_CONFIG_REPLACEMENT
;
3319 xmlXPathFreeContext(xpath_context
);
3320 xmlXPathFreeObject(xpath_object
);
3321 xmlFree(internal_xpath
);
3326 char *config_document_get_element_value(struct config_document
*document
,
3330 int xpath_result_size
;
3331 int value_result_size
;
3333 xmlXPathContextPtr xpath_context
= NULL
;
3334 xmlXPathObjectPtr xpath_object
= NULL
;
3335 xmlNodeSetPtr xpath_result_set
= NULL
;
3336 xmlChar
*internal_xpath
= NULL
;
3337 xmlChar
*internal_value
= NULL
;
3342 internal_xpath
= encode_string(xpath
);
3343 if (!internal_xpath
) {
3345 ERR("Unable to encode xpath string");
3349 /* Initialize xpath context */
3350 xpath_context
= xmlXPathNewContext(document
->document
);
3351 if (!xpath_context
) {
3353 ERR("Unable to create xpath context");
3357 /* Evaluate the xpath expression */
3358 xpath_object
= xmlXPathEvalExpression(internal_xpath
, xpath_context
);
3359 if (!xpath_object
) {
3361 ERR("Unable to evaluate xpath query (invalid query format)");
3365 xpath_result_set
= xpath_object
->nodesetval
;
3366 if (!xpath_result_set
) {
3371 xpath_result_size
= xpath_result_set
->nodeNr
;
3373 if (xpath_result_size
> 1) {
3374 ERR("To many result while fetching config element value");
3379 if (xpath_result_size
== 0) {
3385 * Reverse traversal since last element could be nested under parent
3386 * element present in the result set.
3388 assert(xpath_result_set
->nodeTab
[0]);
3389 internal_value
= xmlNodeGetContent(xpath_result_set
->nodeTab
[0]);
3390 if (!internal_value
) {
3395 value_result_size
= xmlStrlen(internal_value
);
3396 value
= calloc(value_result_size
+ 1, sizeof(char));
3397 strncpy(value
, (char *) internal_value
, value_result_size
);
3400 xmlXPathFreeContext(xpath_context
);
3401 xmlXPathFreeObject(xpath_object
);
3402 xmlFree(internal_xpath
);
3403 xmlFree(internal_value
);
3408 int config_document_element_exist(struct config_document
*document
,
3412 int xpath_result_size
;
3414 xmlXPathContextPtr xpath_context
= NULL
;
3415 xmlXPathObjectPtr xpath_object
= NULL
;
3416 xmlNodeSetPtr xpath_result_set
= NULL
;
3417 xmlChar
*internal_xpath
= NULL
;
3420 assert(document
->document
);
3423 internal_xpath
= encode_string(xpath
);
3424 if (!internal_xpath
) {
3425 ERR("Unable to encode xpath string");
3429 /* Initialize xpath context */
3430 xpath_context
= xmlXPathNewContext(document
->document
);
3431 if (!xpath_context
) {
3432 ERR("Unable to create xpath context");
3436 /* Evaluate the xpath expression */
3437 xpath_object
= xmlXPathEvalExpression(internal_xpath
, xpath_context
);
3438 if (!xpath_object
) {
3439 ERR("Unable to evaluate xpath query (invalid query format)");
3443 xpath_result_set
= xpath_object
->nodesetval
;
3444 if (!xpath_result_set
) {
3448 xpath_result_size
= xpath_result_set
->nodeNr
;
3450 if (xpath_result_size
> 0) {
3454 xmlXPathFreeContext(xpath_context
);
3455 xmlXPathFreeObject(xpath_object
);
3456 xmlFree(internal_xpath
);
3462 struct config_element
*config_element_create(const char *name
,
3465 struct config_element
*element
;
3469 xmlChar
*internal_name
= NULL
;
3470 xmlChar
*internal_value
= NULL
;
3472 internal_name
= encode_string(name
);
3473 if (!internal_name
) {
3474 ERR("Unable to encode config element name string");
3481 internal_value
= encode_string(value
);
3482 if (!internal_value
) {
3483 ERR("Unable to encode config_element value string");
3489 element
= zmalloc(sizeof(struct config_element
));
3494 element
->element
= xmlNewNode(NULL
, internal_name
);
3495 if (!element
->element
) {
3500 if (internal_value
) {
3501 xmlNodeAddContent(element
->element
, internal_value
);
3504 xmlFree(internal_name
);
3505 xmlFree(internal_value
);
3510 int config_element_add_child(struct config_element
*parent
,
3511 const struct config_element
*child
)
3515 assert(parent
->element
);
3516 assert(child
->element
);
3519 xmlNodePtr node
= NULL
;
3520 xmlNodePtr copy
= NULL
;
3522 /* Do a copy to ease the memory management for caller */
3523 copy
= xmlCopyNode(child
->element
, 1);
3525 ret
= -LTTNG_ERR_NOMEM
;
3528 node
= xmlAddChild(parent
->element
, copy
);
3531 ret
= -LTTNG_ERR_CONFIG_ADD_CHILD
;
3540 int config_document_insert_element(struct config_document
*document
,
3541 const char *xpath
, const struct config_element
*element
)
3544 int xpath_result_size
;
3546 xmlXPathContextPtr xpath_context
= NULL
;
3547 xmlXPathObjectPtr xpath_object
= NULL
;
3548 xmlNodeSetPtr xpath_result_set
= NULL
;
3549 xmlChar
*internal_xpath
= NULL
;
3550 xmlNodePtr child_node
= NULL
;
3551 xmlNodePtr local_copy
= NULL
;
3556 assert(element
->element
);
3558 internal_xpath
= encode_string(xpath
);
3559 if (!internal_xpath
) {
3560 ret
= -LTTNG_ERR_NOMEM
;
3564 /* Initialize xpath context */
3565 xpath_context
= xmlXPathNewContext(document
->document
);
3566 if (!xpath_context
) {
3567 ret
= -LTTNG_ERR_NOMEM
;
3571 /* Evaluate the xpath expression */
3572 xpath_object
= xmlXPathEvalExpression(internal_xpath
, xpath_context
);
3573 if (!xpath_object
) {
3574 ret
= -LTTNG_ERR_CONFIG_INVALID_QUERY
;
3578 xpath_result_set
= xpath_object
->nodesetval
;
3579 if (!xpath_result_set
) {
3580 ret
= -LTTNG_ERR_CONFIG_EMPTY_SET
;
3584 xpath_result_size
= xpath_result_set
->nodeNr
;
3586 if (xpath_result_size
> 1) {
3587 ret
= -LTTNG_ERR_CONFIG_INVALID_COUNT
;
3591 if (xpath_result_size
== 0) {
3592 ret
= -LTTNG_ERR_CONFIG_INVALID_COUNT
;
3596 assert(xpath_result_set
->nodeTab
[0]);
3597 /* Do a copy to simply memory management */
3598 local_copy
= xmlCopyNode(element
->element
, 1);
3600 ret
= -LTTNG_ERR_NOMEM
;
3601 ERR("Duplication of node to be insert failed");
3605 child_node
= xmlAddChild(xpath_result_set
->nodeTab
[0], local_copy
);
3607 ret
= -LTTNG_ERR_CONFIG_ADD_CHILD
;
3608 xmlFreeNode(local_copy
);
3612 xmlXPathFreeContext(xpath_context
);
3613 xmlXPathFreeObject(xpath_object
);
3614 xmlFree(internal_xpath
);
3619 void config_element_free(struct config_element
*element
) {
3620 if (element
->element
) {
3621 xmlFree(element
->element
);