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 <lttng/lttng.h>
42 #include <lttng/snapshot.h>
43 #include <lttng/rotation.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 LTTNG_HIDDEN
const char * const config_element_monitor_timer_interval
= "monitor_timer_interval";
96 LTTNG_HIDDEN
const char * const config_element_blocking_timeout
= "blocking_timeout";
97 const char * const config_element_output
= "output";
98 const char * const config_element_output_type
= "output_type";
99 const char * const config_element_tracefile_size
= "tracefile_size";
100 const char * const config_element_tracefile_count
= "tracefile_count";
101 const char * const config_element_live_timer_interval
= "live_timer_interval";
102 LTTNG_HIDDEN
const char * const config_element_discarded_events
= "discarded_events";
103 LTTNG_HIDDEN
const char * const config_element_lost_packets
= "lost_packets";
104 const char * const config_element_type
= "type";
105 const char * const config_element_buffer_type
= "buffer_type";
106 const char * const config_element_session
= "session";
107 const char * const config_element_sessions
= "sessions";
108 LTTNG_HIDDEN
const char * const config_element_context_perf
= "perf";
109 LTTNG_HIDDEN
const char * const config_element_context_app
= "app";
110 LTTNG_HIDDEN
const char * const config_element_context_app_provider_name
= "provider_name";
111 LTTNG_HIDDEN
const char * const config_element_context_app_ctx_name
= "ctx_name";
112 const char * const config_element_config
= "config";
113 const char * const config_element_started
= "started";
114 const char * const config_element_snapshot_mode
= "snapshot_mode";
115 const char * const config_element_loglevel
= "loglevel";
116 const char * const config_element_loglevel_type
= "loglevel_type";
117 const char * const config_element_filter
= "filter";
118 LTTNG_HIDDEN
const char * const config_element_filter_expression
= "filter_expression";
119 const char * const config_element_snapshot_outputs
= "snapshot_outputs";
120 const char * const config_element_consumer_output
= "consumer_output";
121 const char * const config_element_destination
= "destination";
122 const char * const config_element_path
= "path";
123 const char * const config_element_net_output
= "net_output";
124 const char * const config_element_control_uri
= "control_uri";
125 const char * const config_element_data_uri
= "data_uri";
126 const char * const config_element_max_size
= "max_size";
127 const char * const config_element_pid
= "pid";
128 const char * const config_element_pids
= "pids";
129 const char * const config_element_shared_memory_path
= "shared_memory_path";
130 const char * const config_element_pid_tracker
= "pid_tracker";
131 const char * const config_element_trackers
= "trackers";
132 const char * const config_element_targets
= "targets";
133 const char * const config_element_target_pid
= "pid_target";
135 LTTNG_HIDDEN
const char * const config_element_rotation_timer_interval
= "rotation_schedule_timer_period";
136 LTTNG_HIDDEN
const char * const config_element_rotation_size
= "rotation_schedule_size";
137 LTTNG_HIDDEN
const char * const config_element_rotation_schedule
= "rotation_schedule";
139 const char * const config_domain_type_kernel
= "KERNEL";
140 const char * const config_domain_type_ust
= "UST";
141 const char * const config_domain_type_jul
= "JUL";
142 const char * const config_domain_type_log4j
= "LOG4J";
143 const char * const config_domain_type_python
= "PYTHON";
145 const char * const config_buffer_type_per_pid
= "PER_PID";
146 const char * const config_buffer_type_per_uid
= "PER_UID";
147 const char * const config_buffer_type_global
= "GLOBAL";
149 const char * const config_overwrite_mode_discard
= "DISCARD";
150 const char * const config_overwrite_mode_overwrite
= "OVERWRITE";
152 const char * const config_output_type_splice
= "SPLICE";
153 const char * const config_output_type_mmap
= "MMAP";
155 const char * const config_loglevel_type_all
= "ALL";
156 const char * const config_loglevel_type_range
= "RANGE";
157 const char * const config_loglevel_type_single
= "SINGLE";
159 const char * const config_event_type_all
= "ALL";
160 const char * const config_event_type_tracepoint
= "TRACEPOINT";
161 const char * const config_event_type_probe
= "PROBE";
162 const char * const config_event_type_function
= "FUNCTION";
163 const char * const config_event_type_function_entry
= "FUNCTION_ENTRY";
164 const char * const config_event_type_noop
= "NOOP";
165 const char * const config_event_type_syscall
= "SYSCALL";
166 const char * const config_event_type_kprobe
= "KPROBE";
167 const char * const config_event_type_kretprobe
= "KRETPROBE";
169 const char * const config_event_context_pid
= "PID";
170 const char * const config_event_context_procname
= "PROCNAME";
171 const char * const config_event_context_prio
= "PRIO";
172 const char * const config_event_context_nice
= "NICE";
173 const char * const config_event_context_vpid
= "VPID";
174 const char * const config_event_context_tid
= "TID";
175 const char * const config_event_context_vtid
= "VTID";
176 const char * const config_event_context_ppid
= "PPID";
177 const char * const config_event_context_vppid
= "VPPID";
178 const char * const config_event_context_pthread_id
= "PTHREAD_ID";
179 const char * const config_event_context_hostname
= "HOSTNAME";
180 const char * const config_event_context_ip
= "IP";
181 const char * const config_event_context_perf_thread_counter
= "PERF_THREAD_COUNTER";
182 LTTNG_HIDDEN
const char * const config_event_context_app
= "APP";
183 LTTNG_HIDDEN
const char * const config_event_context_interruptible
= "INTERRUPTIBLE";
184 LTTNG_HIDDEN
const char * const config_event_context_preemptible
= "PREEMPTIBLE";
185 LTTNG_HIDDEN
const char * const config_event_context_need_reschedule
= "NEED_RESCHEDULE";
186 LTTNG_HIDDEN
const char * const config_event_context_migratable
= "MIGRATABLE";
188 /* Deprecated symbols */
189 const char * const config_element_perf
;
191 enum process_event_node_phase
{
196 struct consumer_output
{
203 static int config_entry_handler_filter(struct handler_filter_args
*args
,
204 const char *section
, const char *name
, const char *value
)
207 struct config_entry entry
= { section
, name
, value
};
211 if (!section
|| !name
|| !value
) {
217 if (strcmp(args
->section
, section
)) {
222 ret
= args
->handler(&entry
, args
->user_data
);
228 int config_get_section_entries(const char *override_path
, const char *section
,
229 config_entry_handler_cb handler
, void *user_data
)
233 FILE *config_file
= NULL
;
234 struct handler_filter_args filter
= { section
, handler
, user_data
};
236 /* First, try system-wide conf. file. */
237 path
= DEFAULT_DAEMON_SYSTEM_CONFIGPATH
;
239 config_file
= fopen(path
, "r");
241 DBG("Loading daemon conf file at %s", path
);
243 * Return value is not very important here since error or not, we
244 * continue and try the next possible conf. file.
246 (void) ini_parse_file(config_file
,
247 (ini_entry_handler
) config_entry_handler_filter
,
252 /* Second is the user local configuration. */
253 path
= utils_get_home_dir();
255 char fullpath
[PATH_MAX
];
257 ret
= snprintf(fullpath
, sizeof(fullpath
),
258 DEFAULT_DAEMON_HOME_CONFIGPATH
, path
);
260 PERROR("snprintf user conf. path");
264 config_file
= fopen(fullpath
, "r");
266 DBG("Loading daemon user conf file at %s", path
);
268 * Return value is not very important here since error or not, we
269 * continue and try the next possible conf. file.
271 (void) ini_parse_file(config_file
,
272 (ini_entry_handler
) config_entry_handler_filter
,
278 /* Final path is the one that the user might have provided. */
280 config_file
= fopen(override_path
, "r");
282 DBG("Loading daemon command line conf file at %s", override_path
);
283 (void) ini_parse_file(config_file
,
284 (ini_entry_handler
) config_entry_handler_filter
,
288 ERR("Failed to open daemon configuration file at %s",
295 /* Everything went well. */
303 int config_parse_value(const char *value
)
306 char *endptr
, *lower_str
;
316 v
= strtoul(value
, &endptr
, 10);
317 if (endptr
!= value
) {
322 lower_str
= zmalloc(len
+ 1);
329 for (i
= 0; i
< len
; i
++) {
330 lower_str
[i
] = tolower(value
[i
]);
333 if (!strcmp(lower_str
, config_str_yes
) ||
334 !strcmp(lower_str
, config_str_true
) ||
335 !strcmp(lower_str
, config_str_on
)) {
337 } else if (!strcmp(lower_str
, config_str_no
) ||
338 !strcmp(lower_str
, config_str_false
) ||
339 !strcmp(lower_str
, config_str_off
)) {
351 * Returns a xmlChar string which must be released using xmlFree().
353 static xmlChar
*encode_string(const char *in_str
)
355 xmlChar
*out_str
= NULL
;
356 xmlCharEncodingHandlerPtr handler
;
357 int out_len
, ret
, in_len
;
361 handler
= xmlFindCharEncodingHandler(config_xml_encoding
);
363 ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!");
367 in_len
= strlen(in_str
);
369 * Add 1 byte for the NULL terminted character. The factor 4 here is
370 * used because UTF-8 characters can take up to 4 bytes.
372 out_len
= (in_len
* 4) + 1;
373 out_str
= xmlMalloc(out_len
);
378 ret
= handler
->input(out_str
, &out_len
, (const xmlChar
*) in_str
, &in_len
);
385 /* out_len is now the size of out_str */
386 out_str
[out_len
] = '\0';
392 struct config_writer
*config_writer_create(int fd_output
, int indent
)
395 struct config_writer
*writer
;
396 xmlOutputBufferPtr buffer
;
398 writer
= zmalloc(sizeof(struct config_writer
));
400 PERROR("zmalloc config_writer_create");
404 buffer
= xmlOutputBufferCreateFd(fd_output
, NULL
);
409 writer
->writer
= xmlNewTextWriter(buffer
);
410 ret
= xmlTextWriterStartDocument(writer
->writer
, NULL
,
411 config_xml_encoding
, NULL
);
416 ret
= xmlTextWriterSetIndentString(writer
->writer
,
417 BAD_CAST config_xml_indent_string
);
422 ret
= xmlTextWriterSetIndent(writer
->writer
, indent
);
430 config_writer_destroy(writer
);
435 int config_writer_destroy(struct config_writer
*writer
)
444 if (xmlTextWriterEndDocument(writer
->writer
) < 0) {
445 WARN("Could not close XML document");
449 if (writer
->writer
) {
450 xmlFreeTextWriter(writer
->writer
);
459 int config_writer_open_element(struct config_writer
*writer
,
460 const char *element_name
)
463 xmlChar
*encoded_element_name
;
465 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
470 encoded_element_name
= encode_string(element_name
);
471 if (!encoded_element_name
) {
476 ret
= xmlTextWriterStartElement(writer
->writer
, encoded_element_name
);
477 xmlFree(encoded_element_name
);
479 return ret
>= 0 ? 0 : ret
;
483 int config_writer_write_attribute(struct config_writer
*writer
,
484 const char *name
, const char *value
)
487 xmlChar
*encoded_name
= NULL
;
488 xmlChar
*encoded_value
= NULL
;
490 if (!writer
|| !writer
->writer
|| !name
|| !name
[0]) {
495 encoded_name
= encode_string(name
);
501 encoded_value
= encode_string(value
);
502 if (!encoded_value
) {
507 ret
= xmlTextWriterWriteAttribute(writer
->writer
, encoded_name
,
510 xmlFree(encoded_name
);
511 xmlFree(encoded_value
);
512 return ret
>= 0 ? 0 : ret
;
516 int config_writer_close_element(struct config_writer
*writer
)
520 if (!writer
|| !writer
->writer
) {
525 ret
= xmlTextWriterEndElement(writer
->writer
);
527 return ret
>= 0 ? 0 : ret
;
531 int config_writer_write_element_unsigned_int(struct config_writer
*writer
,
532 const char *element_name
, uint64_t value
)
535 xmlChar
*encoded_element_name
;
537 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
542 encoded_element_name
= encode_string(element_name
);
543 if (!encoded_element_name
) {
548 ret
= xmlTextWriterWriteFormatElement(writer
->writer
,
549 encoded_element_name
, "%" PRIu64
, value
);
550 xmlFree(encoded_element_name
);
552 return ret
>= 0 ? 0 : ret
;
556 int config_writer_write_element_signed_int(struct config_writer
*writer
,
557 const char *element_name
, int64_t value
)
560 xmlChar
*encoded_element_name
;
562 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
567 encoded_element_name
= encode_string(element_name
);
568 if (!encoded_element_name
) {
573 ret
= xmlTextWriterWriteFormatElement(writer
->writer
,
574 encoded_element_name
, "%" PRIi64
, value
);
575 xmlFree(encoded_element_name
);
577 return ret
>= 0 ? 0 : ret
;
581 int config_writer_write_element_bool(struct config_writer
*writer
,
582 const char *element_name
, int value
)
584 return config_writer_write_element_string(writer
, element_name
,
585 value
? config_xml_true
: config_xml_false
);
589 int config_writer_write_element_string(struct config_writer
*writer
,
590 const char *element_name
, const char *value
)
593 xmlChar
*encoded_element_name
= NULL
;
594 xmlChar
*encoded_value
= NULL
;
596 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0] ||
602 encoded_element_name
= encode_string(element_name
);
603 if (!encoded_element_name
) {
608 encoded_value
= encode_string(value
);
609 if (!encoded_value
) {
614 ret
= xmlTextWriterWriteElement(writer
->writer
, encoded_element_name
,
617 xmlFree(encoded_element_name
);
618 xmlFree(encoded_value
);
619 return ret
>= 0 ? 0 : ret
;
623 void xml_error_handler(void *ctx
, const char *format
, ...)
629 va_start(args
, format
);
630 ret
= vasprintf(&errMsg
, format
, args
);
633 ERR("String allocation failed in xml error handler");
637 fprintf(stderr
, "XML Error: %s", errMsg
);
642 void fini_session_config_validation_ctx(
643 struct session_config_validation_ctx
*ctx
)
645 if (ctx
->parser_ctx
) {
646 xmlSchemaFreeParserCtxt(ctx
->parser_ctx
);
650 xmlSchemaFree(ctx
->schema
);
653 if (ctx
->schema_validation_ctx
) {
654 xmlSchemaFreeValidCtxt(ctx
->schema_validation_ctx
);
657 memset(ctx
, 0, sizeof(struct session_config_validation_ctx
));
661 char *get_session_config_xsd_path()
664 const char *base_path
= lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV
);
665 size_t base_path_len
;
669 base_path
= DEFAULT_SESSION_CONFIG_XSD_PATH
;
672 base_path_len
= strlen(base_path
);
673 max_path_len
= base_path_len
+
674 sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME
) + 1;
675 xsd_path
= zmalloc(max_path_len
);
680 strcpy(xsd_path
, base_path
);
681 if (xsd_path
[base_path_len
- 1] != '/') {
682 xsd_path
[base_path_len
++] = '/';
685 strcpy(xsd_path
+ base_path_len
, DEFAULT_SESSION_CONFIG_XSD_FILENAME
);
691 int init_session_config_validation_ctx(
692 struct session_config_validation_ctx
*ctx
)
695 char *xsd_path
= get_session_config_xsd_path();
698 ret
= -LTTNG_ERR_NOMEM
;
702 ctx
->parser_ctx
= xmlSchemaNewParserCtxt(xsd_path
);
703 if (!ctx
->parser_ctx
) {
704 ERR("XSD parser context creation failed");
705 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
708 xmlSchemaSetParserErrors(ctx
->parser_ctx
, xml_error_handler
,
709 xml_error_handler
, NULL
);
711 ctx
->schema
= xmlSchemaParse(ctx
->parser_ctx
);
713 ERR("XSD parsing failed");
714 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
718 ctx
->schema_validation_ctx
= xmlSchemaNewValidCtxt(ctx
->schema
);
719 if (!ctx
->schema_validation_ctx
) {
720 ERR("XSD validation context creation failed");
721 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
725 xmlSchemaSetValidErrors(ctx
->schema_validation_ctx
, xml_error_handler
,
726 xml_error_handler
, NULL
);
731 fini_session_config_validation_ctx(ctx
);
739 int parse_uint(xmlChar
*str
, uint64_t *val
)
749 *val
= strtoull((const char *) str
, &endptr
, 10);
750 if (!endptr
|| *endptr
) {
761 int parse_int(xmlChar
*str
, int64_t *val
)
771 *val
= strtoll((const char *) str
, &endptr
, 10);
772 if (!endptr
|| *endptr
) {
783 int parse_bool(xmlChar
*str
, int *val
)
792 if (!strcmp((const char *) str
, config_xml_true
)) {
794 } else if (!strcmp((const char *) str
, config_xml_false
)) {
797 WARN("Invalid boolean value encoutered (%s).",
806 int get_domain_type(xmlChar
*domain
)
814 if (!strcmp((char *) domain
, config_domain_type_kernel
)) {
815 ret
= LTTNG_DOMAIN_KERNEL
;
816 } else if (!strcmp((char *) domain
, config_domain_type_ust
)) {
817 ret
= LTTNG_DOMAIN_UST
;
818 } else if (!strcmp((char *) domain
, config_domain_type_jul
)) {
819 ret
= LTTNG_DOMAIN_JUL
;
820 } else if (!strcmp((char *) domain
, config_domain_type_log4j
)) {
821 ret
= LTTNG_DOMAIN_LOG4J
;
822 } else if (!strcmp((char *) domain
, config_domain_type_python
)) {
823 ret
= LTTNG_DOMAIN_PYTHON
;
834 int get_buffer_type(xmlChar
*buffer_type
)
842 if (!strcmp((char *) buffer_type
, config_buffer_type_global
)) {
843 ret
= LTTNG_BUFFER_GLOBAL
;
844 } else if (!strcmp((char *) buffer_type
, config_buffer_type_per_uid
)) {
845 ret
= LTTNG_BUFFER_PER_UID
;
846 } else if (!strcmp((char *) buffer_type
, config_buffer_type_per_pid
)) {
847 ret
= LTTNG_BUFFER_PER_PID
;
858 int get_overwrite_mode(xmlChar
*overwrite_mode
)
862 if (!overwrite_mode
) {
866 if (!strcmp((char *) overwrite_mode
, config_overwrite_mode_overwrite
)) {
868 } else if (!strcmp((char *) overwrite_mode
,
869 config_overwrite_mode_discard
)) {
881 int get_output_type(xmlChar
*output_type
)
889 if (!strcmp((char *) output_type
, config_output_type_mmap
)) {
890 ret
= LTTNG_EVENT_MMAP
;
891 } else if (!strcmp((char *) output_type
, config_output_type_splice
)) {
892 ret
= LTTNG_EVENT_SPLICE
;
903 int get_event_type(xmlChar
*event_type
)
911 if (!strcmp((char *) event_type
, config_event_type_all
)) {
912 ret
= LTTNG_EVENT_ALL
;
913 } else if (!strcmp((char *) event_type
, config_event_type_tracepoint
)) {
914 ret
= LTTNG_EVENT_TRACEPOINT
;
915 } else if (!strcmp((char *) event_type
, config_event_type_probe
)) {
916 ret
= LTTNG_EVENT_PROBE
;
917 } else if (!strcmp((char *) event_type
, config_event_type_function
)) {
918 ret
= LTTNG_EVENT_FUNCTION
;
919 } else if (!strcmp((char *) event_type
,
920 config_event_type_function_entry
)) {
921 ret
= LTTNG_EVENT_FUNCTION_ENTRY
;
922 } else if (!strcmp((char *) event_type
, config_event_type_noop
)) {
923 ret
= LTTNG_EVENT_NOOP
;
924 } else if (!strcmp((char *) event_type
, config_event_type_syscall
)) {
925 ret
= LTTNG_EVENT_SYSCALL
;
936 int get_loglevel_type(xmlChar
*loglevel_type
)
940 if (!loglevel_type
) {
944 if (!strcmp((char *) loglevel_type
, config_loglevel_type_all
)) {
945 ret
= LTTNG_EVENT_LOGLEVEL_ALL
;
946 } else if (!strcmp((char *) loglevel_type
,
947 config_loglevel_type_range
)) {
948 ret
= LTTNG_EVENT_LOGLEVEL_RANGE
;
949 } else if (!strcmp((char *) loglevel_type
,
950 config_loglevel_type_single
)) {
951 ret
= LTTNG_EVENT_LOGLEVEL_SINGLE
;
962 * Return the context type or -1 on error.
965 int get_context_type(xmlChar
*context_type
)
973 if (!strcmp((char *) context_type
, config_event_context_pid
)) {
974 ret
= LTTNG_EVENT_CONTEXT_PID
;
975 } else if (!strcmp((char *) context_type
,
976 config_event_context_procname
)) {
977 ret
= LTTNG_EVENT_CONTEXT_PROCNAME
;
978 } else if (!strcmp((char *) context_type
,
979 config_event_context_prio
)) {
980 ret
= LTTNG_EVENT_CONTEXT_PRIO
;
981 } else if (!strcmp((char *) context_type
,
982 config_event_context_nice
)) {
983 ret
= LTTNG_EVENT_CONTEXT_NICE
;
984 } else if (!strcmp((char *) context_type
,
985 config_event_context_vpid
)) {
986 ret
= LTTNG_EVENT_CONTEXT_VPID
;
987 } else if (!strcmp((char *) context_type
,
988 config_event_context_tid
)) {
989 ret
= LTTNG_EVENT_CONTEXT_TID
;
990 } else if (!strcmp((char *) context_type
,
991 config_event_context_vtid
)) {
992 ret
= LTTNG_EVENT_CONTEXT_VTID
;
993 } else if (!strcmp((char *) context_type
,
994 config_event_context_ppid
)) {
995 ret
= LTTNG_EVENT_CONTEXT_PPID
;
996 } else if (!strcmp((char *) context_type
,
997 config_event_context_vppid
)) {
998 ret
= LTTNG_EVENT_CONTEXT_VPPID
;
999 } else if (!strcmp((char *) context_type
,
1000 config_event_context_pthread_id
)) {
1001 ret
= LTTNG_EVENT_CONTEXT_PTHREAD_ID
;
1002 } else if (!strcmp((char *) context_type
,
1003 config_event_context_hostname
)) {
1004 ret
= LTTNG_EVENT_CONTEXT_HOSTNAME
;
1005 } else if (!strcmp((char *) context_type
,
1006 config_event_context_ip
)) {
1007 ret
= LTTNG_EVENT_CONTEXT_IP
;
1008 } else if (!strcmp((char *) context_type
,
1009 config_event_context_interruptible
)) {
1010 ret
= LTTNG_EVENT_CONTEXT_INTERRUPTIBLE
;
1011 } else if (!strcmp((char *) context_type
,
1012 config_event_context_preemptible
)) {
1013 ret
= LTTNG_EVENT_CONTEXT_PREEMPTIBLE
;
1014 } else if (!strcmp((char *) context_type
,
1015 config_event_context_need_reschedule
)) {
1016 ret
= LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE
;
1017 } else if (!strcmp((char *) context_type
,
1018 config_event_context_migratable
)) {
1019 ret
= LTTNG_EVENT_CONTEXT_MIGRATABLE
;
1030 int init_domain(xmlNodePtr domain_node
, struct lttng_domain
*domain
)
1035 for (node
= xmlFirstElementChild(domain_node
); node
;
1036 node
= xmlNextElementSibling(node
)) {
1037 if (!strcmp((const char *) node
->name
, config_element_type
)) {
1039 xmlChar
*node_content
= xmlNodeGetContent(node
);
1040 if (!node_content
) {
1041 ret
= -LTTNG_ERR_NOMEM
;
1045 ret
= get_domain_type(node_content
);
1048 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1053 } else if (!strcmp((const char *) node
->name
,
1054 config_element_buffer_type
)) {
1056 xmlChar
*node_content
= xmlNodeGetContent(node
);
1057 if (!node_content
) {
1058 ret
= -LTTNG_ERR_NOMEM
;
1062 ret
= get_buffer_type(node_content
);
1065 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1069 domain
->buf_type
= ret
;
1078 int get_net_output_uris(xmlNodePtr net_output_node
, char **control_uri
,
1083 for (node
= xmlFirstElementChild(net_output_node
); node
;
1084 node
= xmlNextElementSibling(node
)) {
1085 if (!strcmp((const char *) node
->name
, config_element_control_uri
)) {
1087 *control_uri
= (char *) xmlNodeGetContent(node
);
1088 if (!*control_uri
) {
1093 *data_uri
= (char *) xmlNodeGetContent(node
);
1100 return *control_uri
|| *data_uri
? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1104 int process_consumer_output(xmlNodePtr consumer_output_node
,
1105 struct consumer_output
*output
)
1112 for (node
= xmlFirstElementChild(consumer_output_node
); node
;
1113 node
= xmlNextElementSibling(node
)) {
1114 if (!strcmp((const char *) node
->name
, config_element_enabled
)) {
1115 xmlChar
*enabled_str
= xmlNodeGetContent(node
);
1119 ret
= -LTTNG_ERR_NOMEM
;
1123 ret
= parse_bool(enabled_str
, &output
->enabled
);
1129 xmlNodePtr output_type_node
;
1132 output_type_node
= xmlFirstElementChild(node
);
1133 if (!output_type_node
) {
1134 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1138 if (!strcmp((const char *) output_type_node
->name
,
1139 config_element_path
)) {
1141 output
->path
= (char *) xmlNodeGetContent(output_type_node
);
1142 if (!output
->path
) {
1143 ret
= -LTTNG_ERR_NOMEM
;
1148 ret
= get_net_output_uris(output_type_node
,
1149 &output
->control_uri
, &output
->data_uri
);
1161 free(output
->control_uri
);
1162 free(output
->data_uri
);
1163 memset(output
, 0, sizeof(struct consumer_output
));
1169 int create_session_net_output(const char *name
, const char *control_uri
,
1170 const char *data_uri
)
1173 struct lttng_handle
*handle
;
1174 const char *uri
= NULL
;
1178 handle
= lttng_create_handle(name
, NULL
);
1180 ret
= -LTTNG_ERR_NOMEM
;
1184 if (!control_uri
|| !data_uri
) {
1185 uri
= control_uri
? control_uri
: data_uri
;
1190 ret
= lttng_set_consumer_url(handle
, control_uri
, data_uri
);
1191 lttng_destroy_handle(handle
);
1197 int create_snapshot_session(const char *session_name
, xmlNodePtr output_node
,
1198 const struct config_load_session_override_attr
*overrides
)
1201 xmlNodePtr node
= NULL
;
1202 xmlNodePtr snapshot_output_list_node
;
1203 xmlNodePtr snapshot_output_node
;
1205 assert(session_name
);
1207 ret
= lttng_create_session_snapshot(session_name
, NULL
);
1216 snapshot_output_list_node
= xmlFirstElementChild(output_node
);
1218 /* Parse and create snapshot outputs */
1220 for (snapshot_output_node
=
1221 xmlFirstElementChild(snapshot_output_list_node
);
1222 snapshot_output_node
; snapshot_output_node
=
1223 xmlNextElementSibling(snapshot_output_node
)) {
1225 uint64_t max_size
= UINT64_MAX
;
1226 struct consumer_output output
= { 0 };
1227 struct lttng_snapshot_output
*snapshot_output
= NULL
;
1228 const char *control_uri
= NULL
;
1229 const char *data_uri
= NULL
;
1230 const char *path
= NULL
;
1232 for (node
= xmlFirstElementChild(snapshot_output_node
); node
;
1233 node
= xmlNextElementSibling(node
)) {
1234 if (!strcmp((const char *) node
->name
,
1235 config_element_name
)) {
1237 name
= (char *) xmlNodeGetContent(node
);
1239 ret
= -LTTNG_ERR_NOMEM
;
1240 goto error_snapshot_output
;
1242 } else if (!strcmp((const char *) node
->name
,
1243 config_element_max_size
)) {
1244 xmlChar
*content
= xmlNodeGetContent(node
);
1248 ret
= -LTTNG_ERR_NOMEM
;
1249 goto error_snapshot_output
;
1251 ret
= parse_uint(content
, &max_size
);
1254 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1255 goto error_snapshot_output
;
1258 /* consumer_output */
1259 ret
= process_consumer_output(node
, &output
);
1261 goto error_snapshot_output
;
1266 control_uri
= output
.control_uri
;
1267 data_uri
= output
.data_uri
;
1271 if (overrides
->path_url
) {
1272 path
= overrides
->path_url
;
1273 /* Control/data_uri are null */
1277 if (overrides
->ctrl_url
) {
1278 control_uri
= overrides
->ctrl_url
;
1282 if (overrides
->data_url
) {
1283 data_uri
= overrides
->data_url
;
1290 snapshot_output
= lttng_snapshot_output_create();
1291 if (!snapshot_output
) {
1292 ret
= -LTTNG_ERR_NOMEM
;
1293 goto error_snapshot_output
;
1296 ret
= lttng_snapshot_output_set_name(name
, snapshot_output
);
1298 goto error_snapshot_output
;
1301 ret
= lttng_snapshot_output_set_size(max_size
, snapshot_output
);
1303 goto error_snapshot_output
;
1307 ret
= lttng_snapshot_output_set_ctrl_url(path
,
1310 goto error_snapshot_output
;
1314 ret
= lttng_snapshot_output_set_ctrl_url(control_uri
,
1317 goto error_snapshot_output
;
1322 ret
= lttng_snapshot_output_set_data_url(data_uri
,
1325 goto error_snapshot_output
;
1330 ret
= lttng_snapshot_add_output(session_name
, snapshot_output
);
1331 error_snapshot_output
:
1334 free(output
.control_uri
);
1335 free(output
.data_uri
);
1336 lttng_snapshot_output_destroy(snapshot_output
);
1346 int create_session(const char *name
,
1347 xmlNodePtr output_node
,
1348 uint64_t live_timer_interval
,
1349 const struct config_load_session_override_attr
*overrides
)
1352 struct consumer_output output
= { 0 };
1353 xmlNodePtr consumer_output_node
;
1354 const char *control_uri
= NULL
;
1355 const char *data_uri
= NULL
;
1356 const char *path
= NULL
;
1361 consumer_output_node
= xmlFirstElementChild(output_node
);
1362 if (!consumer_output_node
) {
1363 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1367 if (strcmp((const char *) consumer_output_node
->name
,
1368 config_element_consumer_output
)) {
1369 WARN("Invalid output type, expected %s node",
1370 config_element_consumer_output
);
1371 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1375 ret
= process_consumer_output(consumer_output_node
, &output
);
1381 control_uri
= output
.control_uri
;
1382 data_uri
= output
.data_uri
;
1385 /* Check for override and apply them */
1387 if (overrides
->path_url
) {
1388 path
= overrides
->path_url
;
1389 /* control/data_uri are null */;
1393 if (overrides
->ctrl_url
) {
1394 control_uri
= overrides
->ctrl_url
;
1398 if (overrides
->data_url
) {
1399 data_uri
= overrides
->data_url
;
1407 if (live_timer_interval
!= UINT64_MAX
&& !control_uri
&& !data_uri
) {
1408 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1412 if (control_uri
|| data_uri
) {
1413 /* network destination */
1414 if (live_timer_interval
&& live_timer_interval
!= UINT64_MAX
) {
1416 * URLs are provided for sure since the test above make sure that
1417 * with a live timer the data and control URIs are provided. So,
1418 * NULL is passed here and will be set right after.
1420 ret
= lttng_create_session_live(name
, NULL
, live_timer_interval
);
1422 ret
= lttng_create_session(name
, NULL
);
1428 ret
= create_session_net_output(name
, control_uri
, data_uri
);
1434 /* either local output or no output */
1435 ret
= lttng_create_session(name
, path
);
1442 free(output
.control_uri
);
1443 free(output
.data_uri
);
1447 int process_probe_attribute_node(xmlNodePtr probe_attribute_node
,
1448 struct lttng_event_probe_attr
*attr
)
1452 assert(probe_attribute_node
);
1455 if (!strcmp((const char *) probe_attribute_node
->name
,
1456 config_element_address
)) {
1461 content
= xmlNodeGetContent(probe_attribute_node
);
1463 ret
= -LTTNG_ERR_NOMEM
;
1467 ret
= parse_uint(content
, &addr
);
1470 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1475 } else if (!strcmp((const char *) probe_attribute_node
->name
,
1476 config_element_offset
)) {
1478 uint64_t offset
= 0;
1481 content
= xmlNodeGetContent(probe_attribute_node
);
1483 ret
= -LTTNG_ERR_NOMEM
;
1487 ret
= parse_uint(content
, &offset
);
1490 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1494 attr
->offset
= offset
;
1495 } else if (!strcmp((const char *) probe_attribute_node
->name
,
1496 config_element_symbol_name
)) {
1500 content
= xmlNodeGetContent(probe_attribute_node
);
1502 ret
= -LTTNG_ERR_NOMEM
;
1506 ret
= lttng_strncpy(attr
->symbol_name
,
1507 (const char *) content
,
1508 LTTNG_SYMBOL_NAME_LEN
);
1510 ERR("symbol name \"%s\"'s length (%zu) exceeds the maximal permitted length (%d) in session configuration",
1511 (const char *) content
,
1512 strlen((const char *) content
),
1513 LTTNG_SYMBOL_NAME_LEN
);
1514 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1526 int process_event_node(xmlNodePtr event_node
, struct lttng_handle
*handle
,
1527 const char *channel_name
, const enum process_event_node_phase phase
)
1531 struct lttng_event event
;
1532 char **exclusions
= NULL
;
1533 unsigned long exclusion_count
= 0;
1534 char *filter_expression
= NULL
;
1538 assert(channel_name
);
1540 memset(&event
, 0, sizeof(event
));
1542 /* Initialize default log level which varies by domain */
1543 switch (handle
->domain
.type
)
1545 case LTTNG_DOMAIN_JUL
:
1546 event
.loglevel
= LTTNG_LOGLEVEL_JUL_ALL
;
1548 case LTTNG_DOMAIN_LOG4J
:
1549 event
.loglevel
= LTTNG_LOGLEVEL_LOG4J_ALL
;
1551 case LTTNG_DOMAIN_PYTHON
:
1552 event
.loglevel
= LTTNG_LOGLEVEL_PYTHON_DEBUG
;
1554 case LTTNG_DOMAIN_UST
:
1555 case LTTNG_DOMAIN_KERNEL
:
1556 event
.loglevel
= LTTNG_LOGLEVEL_DEBUG
;
1562 for (node
= xmlFirstElementChild(event_node
); node
;
1563 node
= xmlNextElementSibling(node
)) {
1564 if (!strcmp((const char *) node
->name
, config_element_name
)) {
1568 content
= xmlNodeGetContent(node
);
1570 ret
= -LTTNG_ERR_NOMEM
;
1574 ret
= lttng_strncpy(event
.name
,
1575 (const char *) content
,
1576 LTTNG_SYMBOL_NAME_LEN
);
1578 WARN("Event \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration",
1579 (const char *) content
,
1580 strlen((const char *) content
),
1581 LTTNG_SYMBOL_NAME_LEN
);
1582 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1587 } else if (!strcmp((const char *) node
->name
,
1588 config_element_enabled
)) {
1589 xmlChar
*content
= xmlNodeGetContent(node
);
1593 ret
= -LTTNG_ERR_NOMEM
;
1597 ret
= parse_bool(content
, &event
.enabled
);
1600 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1603 } else if (!strcmp((const char *) node
->name
,
1604 config_element_type
)) {
1605 xmlChar
*content
= xmlNodeGetContent(node
);
1609 ret
= -LTTNG_ERR_NOMEM
;
1613 ret
= get_event_type(content
);
1616 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1621 } else if (!strcmp((const char *) node
->name
,
1622 config_element_loglevel_type
)) {
1623 xmlChar
*content
= xmlNodeGetContent(node
);
1627 ret
= -LTTNG_ERR_NOMEM
;
1631 ret
= get_loglevel_type(content
);
1634 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1638 event
.loglevel_type
= ret
;
1639 } else if (!strcmp((const char *) node
->name
,
1640 config_element_loglevel
)) {
1642 int64_t loglevel
= 0;
1645 content
= xmlNodeGetContent(node
);
1647 ret
= -LTTNG_ERR_NOMEM
;
1651 ret
= parse_int(content
, &loglevel
);
1654 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1658 if (loglevel
> INT_MAX
|| loglevel
< INT_MIN
) {
1659 WARN("loglevel out of range.");
1660 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1664 event
.loglevel
= loglevel
;
1665 } else if (!strcmp((const char *) node
->name
,
1666 config_element_filter
)) {
1668 xmlNodeGetContent(node
);
1672 ret
= -LTTNG_ERR_NOMEM
;
1676 free(filter_expression
);
1677 filter_expression
= strdup((char *) content
);
1679 if (!filter_expression
) {
1680 ret
= -LTTNG_ERR_NOMEM
;
1683 } else if (!strcmp((const char *) node
->name
,
1684 config_element_exclusions
)) {
1685 xmlNodePtr exclusion_node
;
1686 int exclusion_index
= 0;
1691 * Exclusions has already been initialized,
1694 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1698 exclusion_count
= xmlChildElementCount(node
);
1699 if (!exclusion_count
) {
1703 exclusions
= zmalloc(exclusion_count
* sizeof(char *));
1705 exclusion_count
= 0;
1706 ret
= -LTTNG_ERR_NOMEM
;
1710 for (exclusion_node
= xmlFirstElementChild(node
); exclusion_node
;
1711 exclusion_node
= xmlNextElementSibling(exclusion_node
)) {
1713 xmlNodeGetContent(exclusion_node
);
1716 ret
= -LTTNG_ERR_NOMEM
;
1720 exclusions
[exclusion_index
] = strdup((const char *) content
);
1722 if (!exclusions
[exclusion_index
]) {
1723 ret
= -LTTNG_ERR_NOMEM
;
1729 event
.exclusion
= 1;
1730 } else if (!strcmp((const char *) node
->name
,
1731 config_element_attributes
)) {
1732 xmlNodePtr attribute_node
= xmlFirstElementChild(node
);
1735 if (!attribute_node
) {
1736 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1740 if (!strcmp((const char *) node
->name
,
1741 config_element_probe_attributes
)) {
1742 xmlNodePtr probe_attribute_node
;
1744 /* probe_attributes */
1745 for (probe_attribute_node
=
1746 xmlFirstElementChild(attribute_node
); probe_attribute_node
;
1747 probe_attribute_node
= xmlNextElementSibling(
1748 probe_attribute_node
)) {
1750 ret
= process_probe_attribute_node(probe_attribute_node
,
1759 xmlNodePtr symbol_node
= xmlFirstElementChild(attribute_node
);
1761 /* function_attributes */
1762 content
= xmlNodeGetContent(symbol_node
);
1764 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1768 sym_len
= strlen((char *) content
);
1769 if (sym_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1770 WARN("Function name too long.");
1771 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1776 ret
= lttng_strncpy(
1777 event
.attr
.ftrace
.symbol_name
,
1778 (char *) content
, sym_len
);
1780 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1789 if ((event
.enabled
&& phase
== ENABLE
) || phase
== CREATION
) {
1790 ret
= lttng_enable_event_with_exclusions(handle
, &event
, channel_name
,
1791 filter_expression
, exclusion_count
, exclusions
);
1793 WARN("Enabling event (name:%s) on load failed.", event
.name
);
1794 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1800 for (i
= 0; i
< exclusion_count
; i
++) {
1801 free(exclusions
[i
]);
1805 free(filter_expression
);
1810 int process_events_node(xmlNodePtr events_node
, struct lttng_handle
*handle
,
1811 const char *channel_name
)
1814 struct lttng_event event
;
1817 assert(events_node
);
1819 assert(channel_name
);
1821 for (node
= xmlFirstElementChild(events_node
); node
;
1822 node
= xmlNextElementSibling(node
)) {
1823 ret
= process_event_node(node
, handle
, channel_name
, CREATION
);
1830 * Disable all events to enable only the necessary events.
1831 * Limitations regarding lttng_disable_events and tuple descriptor
1832 * force this approach.
1834 memset(&event
, 0, sizeof(event
));
1835 event
.loglevel
= -1;
1836 event
.type
= LTTNG_EVENT_ALL
;
1837 ret
= lttng_disable_event_ext(handle
, &event
, channel_name
, NULL
);
1842 for (node
= xmlFirstElementChild(events_node
); node
;
1843 node
= xmlNextElementSibling(node
)) {
1844 ret
= process_event_node(node
, handle
, channel_name
, ENABLE
);
1855 int process_channel_attr_node(xmlNodePtr attr_node
,
1856 struct lttng_channel
*channel
, xmlNodePtr
*contexts_node
,
1857 xmlNodePtr
*events_node
)
1863 assert(contexts_node
);
1864 assert(events_node
);
1866 if (!strcmp((const char *) attr_node
->name
, config_element_name
)) {
1870 content
= xmlNodeGetContent(attr_node
);
1872 ret
= -LTTNG_ERR_NOMEM
;
1876 ret
= lttng_strncpy(channel
->name
,
1877 (const char *) content
,
1878 LTTNG_SYMBOL_NAME_LEN
);
1880 WARN("Channel \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration",
1881 (const char *) content
,
1882 strlen((const char *) content
),
1883 LTTNG_SYMBOL_NAME_LEN
);
1884 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1889 } else if (!strcmp((const char *) attr_node
->name
,
1890 config_element_enabled
)) {
1895 content
= xmlNodeGetContent(attr_node
);
1897 ret
= -LTTNG_ERR_NOMEM
;
1901 ret
= parse_bool(content
, &enabled
);
1904 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1908 channel
->enabled
= enabled
;
1909 } else if (!strcmp((const char *) attr_node
->name
,
1910 config_element_overwrite_mode
)) {
1913 /* overwrite_mode */
1914 content
= xmlNodeGetContent(attr_node
);
1916 ret
= -LTTNG_ERR_NOMEM
;
1920 ret
= get_overwrite_mode(content
);
1923 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1927 channel
->attr
.overwrite
= ret
;
1928 } else if (!strcmp((const char *) attr_node
->name
,
1929 config_element_subbuf_size
)) {
1932 /* subbuffer_size */
1933 content
= xmlNodeGetContent(attr_node
);
1935 ret
= -LTTNG_ERR_NOMEM
;
1939 ret
= parse_uint(content
, &channel
->attr
.subbuf_size
);
1942 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1945 } else if (!strcmp((const char *) attr_node
->name
,
1946 config_element_num_subbuf
)) {
1949 /* subbuffer_count */
1950 content
= xmlNodeGetContent(attr_node
);
1952 ret
= -LTTNG_ERR_NOMEM
;
1956 ret
= parse_uint(content
, &channel
->attr
.num_subbuf
);
1959 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1962 } else if (!strcmp((const char *) attr_node
->name
,
1963 config_element_switch_timer_interval
)) {
1965 uint64_t switch_timer_interval
= 0;
1967 /* switch_timer_interval */
1968 content
= xmlNodeGetContent(attr_node
);
1970 ret
= -LTTNG_ERR_NOMEM
;
1974 ret
= parse_uint(content
, &switch_timer_interval
);
1977 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1981 if (switch_timer_interval
> UINT_MAX
) {
1982 WARN("switch_timer_interval out of range.");
1983 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1987 channel
->attr
.switch_timer_interval
=
1988 switch_timer_interval
;
1989 } else if (!strcmp((const char *) attr_node
->name
,
1990 config_element_read_timer_interval
)) {
1992 uint64_t read_timer_interval
= 0;
1994 /* read_timer_interval */
1995 content
= xmlNodeGetContent(attr_node
);
1997 ret
= -LTTNG_ERR_NOMEM
;
2001 ret
= parse_uint(content
, &read_timer_interval
);
2004 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2008 if (read_timer_interval
> UINT_MAX
) {
2009 WARN("read_timer_interval out of range.");
2010 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2014 channel
->attr
.read_timer_interval
=
2015 read_timer_interval
;
2016 } else if (!strcmp((const char *) attr_node
->name
,
2017 config_element_output_type
)) {
2021 content
= xmlNodeGetContent(attr_node
);
2023 ret
= -LTTNG_ERR_NOMEM
;
2027 ret
= get_output_type(content
);
2030 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2034 channel
->attr
.output
= ret
;
2035 } else if (!strcmp((const char *) attr_node
->name
,
2036 config_element_tracefile_size
)) {
2039 /* tracefile_size */
2040 content
= xmlNodeGetContent(attr_node
);
2042 ret
= -LTTNG_ERR_NOMEM
;
2046 ret
= parse_uint(content
, &channel
->attr
.tracefile_size
);
2049 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2052 } else if (!strcmp((const char *) attr_node
->name
,
2053 config_element_tracefile_count
)) {
2056 /* tracefile_count */
2057 content
= xmlNodeGetContent(attr_node
);
2059 ret
= -LTTNG_ERR_NOMEM
;
2063 ret
= parse_uint(content
, &channel
->attr
.tracefile_count
);
2066 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2069 } else if (!strcmp((const char *) attr_node
->name
,
2070 config_element_live_timer_interval
)) {
2072 uint64_t live_timer_interval
= 0;
2074 /* live_timer_interval */
2075 content
= xmlNodeGetContent(attr_node
);
2077 ret
= -LTTNG_ERR_NOMEM
;
2081 ret
= parse_uint(content
, &live_timer_interval
);
2084 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2088 if (live_timer_interval
> UINT_MAX
) {
2089 WARN("live_timer_interval out of range.");
2090 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2094 channel
->attr
.live_timer_interval
=
2095 live_timer_interval
;
2096 } else if (!strcmp((const char *) attr_node
->name
,
2097 config_element_monitor_timer_interval
)) {
2099 uint64_t monitor_timer_interval
= 0;
2101 /* monitor_timer_interval */
2102 content
= xmlNodeGetContent(attr_node
);
2104 ret
= -LTTNG_ERR_NOMEM
;
2108 ret
= parse_uint(content
, &monitor_timer_interval
);
2111 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2115 ret
= lttng_channel_set_monitor_timer_interval(channel
,
2116 monitor_timer_interval
);
2118 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2121 } else if (!strcmp((const char *) attr_node
->name
,
2122 config_element_blocking_timeout
)) {
2124 int64_t blocking_timeout
= 0;
2126 /* blocking_timeout */
2127 content
= xmlNodeGetContent(attr_node
);
2129 ret
= -LTTNG_ERR_NOMEM
;
2133 ret
= parse_int(content
, &blocking_timeout
);
2136 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2140 ret
= lttng_channel_set_blocking_timeout(channel
,
2143 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2146 } else if (!strcmp((const char *) attr_node
->name
,
2147 config_element_events
)) {
2149 *events_node
= attr_node
;
2152 *contexts_node
= attr_node
;
2160 int process_context_node(xmlNodePtr context_node
,
2161 struct lttng_handle
*handle
, const char *channel_name
)
2164 struct lttng_event_context context
;
2165 xmlNodePtr context_child_node
= xmlFirstElementChild(context_node
);
2168 assert(channel_name
);
2170 if (!context_child_node
) {
2171 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2175 memset(&context
, 0, sizeof(context
));
2177 if (!strcmp((const char *) context_child_node
->name
,
2178 config_element_type
)) {
2180 xmlChar
*content
= xmlNodeGetContent(context_child_node
);
2183 ret
= -LTTNG_ERR_NOMEM
;
2187 ret
= get_context_type(content
);
2190 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2195 } else if (!strcmp((const char *) context_child_node
->name
,
2196 config_element_context_perf
)) {
2198 xmlNodePtr perf_attr_node
;
2200 context
.ctx
= handle
->domain
.type
== LTTNG_DOMAIN_KERNEL
?
2201 LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER
:
2202 LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER
;
2203 for (perf_attr_node
= xmlFirstElementChild(context_child_node
);
2204 perf_attr_node
; perf_attr_node
=
2205 xmlNextElementSibling(perf_attr_node
)) {
2206 if (!strcmp((const char *) perf_attr_node
->name
,
2207 config_element_type
)) {
2212 content
= xmlNodeGetContent(perf_attr_node
);
2214 ret
= -LTTNG_ERR_NOMEM
;
2218 ret
= parse_uint(content
, &type
);
2221 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2225 if (type
> UINT32_MAX
) {
2226 WARN("perf context type out of range.");
2227 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2231 context
.u
.perf_counter
.type
= type
;
2232 } else if (!strcmp((const char *) perf_attr_node
->name
,
2233 config_element_config
)) {
2235 uint64_t config
= 0;
2238 content
= xmlNodeGetContent(perf_attr_node
);
2240 ret
= -LTTNG_ERR_NOMEM
;
2244 ret
= parse_uint(content
, &config
);
2247 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2251 context
.u
.perf_counter
.config
= config
;
2252 } else if (!strcmp((const char *) perf_attr_node
->name
,
2253 config_element_name
)) {
2257 content
= xmlNodeGetContent(perf_attr_node
);
2259 ret
= -LTTNG_ERR_NOMEM
;
2263 ret
= lttng_strncpy(context
.u
.perf_counter
.name
,
2264 (const char *) content
,
2265 LTTNG_SYMBOL_NAME_LEN
);
2267 WARN("Perf counter \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration",
2268 (const char *) content
,
2269 strlen((const char *) content
),
2270 LTTNG_SYMBOL_NAME_LEN
);
2271 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2278 } else if (!strcmp((const char *) context_child_node
->name
,
2279 config_element_context_app
)) {
2280 /* application context */
2281 xmlNodePtr app_ctx_node
;
2283 context
.ctx
= LTTNG_EVENT_CONTEXT_APP_CONTEXT
;
2284 for (app_ctx_node
= xmlFirstElementChild(context_child_node
);
2285 app_ctx_node
; app_ctx_node
=
2286 xmlNextElementSibling(app_ctx_node
)) {
2288 char **target
= strcmp(
2289 (const char *) app_ctx_node
->name
,
2290 config_element_context_app_provider_name
) == 0 ?
2291 &context
.u
.app_ctx
.provider_name
:
2292 &context
.u
.app_ctx
.ctx_name
;
2294 content
= xmlNodeGetContent(app_ctx_node
);
2296 ret
= -LTTNG_ERR_NOMEM
;
2300 *target
= (char *) content
;
2303 /* Unrecognized context type */
2304 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2308 ret
= lttng_add_context(handle
, &context
, NULL
, channel_name
);
2309 if (context
.ctx
== LTTNG_EVENT_CONTEXT_APP_CONTEXT
) {
2310 free(context
.u
.app_ctx
.provider_name
);
2311 free(context
.u
.app_ctx
.ctx_name
);
2318 int process_contexts_node(xmlNodePtr contexts_node
,
2319 struct lttng_handle
*handle
, const char *channel_name
)
2322 xmlNodePtr context_node
;
2324 for (context_node
= xmlFirstElementChild(contexts_node
); context_node
;
2325 context_node
= xmlNextElementSibling(context_node
)) {
2326 ret
= process_context_node(context_node
, handle
, channel_name
);
2336 int process_pid_tracker_node(xmlNodePtr pid_tracker_node
,
2337 struct lttng_handle
*handle
)
2340 xmlNodePtr targets_node
= NULL
;
2344 assert(pid_tracker_node
);
2345 /* get the targets node */
2346 for (node
= xmlFirstElementChild(pid_tracker_node
); node
;
2347 node
= xmlNextElementSibling(node
)) {
2348 if (!strcmp((const char *) node
->name
,
2349 config_element_targets
)) {
2350 targets_node
= node
;
2355 if (!targets_node
) {
2356 ret
= LTTNG_ERR_INVALID
;
2360 /* Go through all pid_target node */
2361 child
= xmlChildElementCount(targets_node
);
2363 /* The session is explicitly set to target nothing. */
2364 ret
= lttng_untrack_pid(handle
, -1);
2369 for (node
= xmlFirstElementChild(targets_node
); node
;
2370 node
= xmlNextElementSibling(node
)) {
2371 xmlNodePtr pid_target_node
= node
;
2373 /* get pid node and track it */
2374 for (node
= xmlFirstElementChild(pid_target_node
); node
;
2375 node
= xmlNextElementSibling(node
)) {
2376 if (!strcmp((const char *) node
->name
,
2377 config_element_pid
)) {
2379 xmlChar
*content
= NULL
;
2381 content
= xmlNodeGetContent(node
);
2383 ret
= LTTNG_ERR_LOAD_INVALID_CONFIG
;
2387 ret
= parse_int(content
, &pid
);
2390 ret
= LTTNG_ERR_LOAD_INVALID_CONFIG
;
2394 ret
= lttng_track_pid(handle
, (int) pid
);
2400 node
= pid_target_node
;
2408 int process_domain_node(xmlNodePtr domain_node
, const char *session_name
)
2411 struct lttng_domain domain
= { 0 };
2412 struct lttng_handle
*handle
= NULL
;
2413 struct lttng_channel
*channel
= NULL
;
2414 xmlNodePtr channels_node
= NULL
;
2415 xmlNodePtr trackers_node
= NULL
;
2416 xmlNodePtr pid_tracker_node
= NULL
;
2419 assert(session_name
);
2421 ret
= init_domain(domain_node
, &domain
);
2426 handle
= lttng_create_handle(session_name
, &domain
);
2428 ret
= -LTTNG_ERR_NOMEM
;
2432 /* get the channels node */
2433 for (node
= xmlFirstElementChild(domain_node
); node
;
2434 node
= xmlNextElementSibling(node
)) {
2435 if (!strcmp((const char *) node
->name
,
2436 config_element_channels
)) {
2437 channels_node
= node
;
2442 if (!channels_node
) {
2446 /* create all channels */
2447 for (node
= xmlFirstElementChild(channels_node
); node
;
2448 node
= xmlNextElementSibling(node
)) {
2449 const enum lttng_domain_type original_domain
= domain
.type
;
2450 xmlNodePtr contexts_node
= NULL
;
2451 xmlNodePtr events_node
= NULL
;
2452 xmlNodePtr channel_attr_node
;
2455 * Channels of the "agent" types cannot be created directly.
2456 * They are meant to be created implicitly through the
2457 * activation of events in their domain. However, a user
2458 * can override the default channel configuration attributes
2459 * by creating the underlying UST channel _before_ enabling
2460 * an agent domain event.
2462 * Hence, the channel's type is substituted before the creation
2463 * and restored by the time the events are created.
2465 switch (domain
.type
) {
2466 case LTTNG_DOMAIN_JUL
:
2467 case LTTNG_DOMAIN_LOG4J
:
2468 case LTTNG_DOMAIN_PYTHON
:
2469 domain
.type
= LTTNG_DOMAIN_UST
;
2474 channel
= lttng_channel_create(&domain
);
2480 for (channel_attr_node
= xmlFirstElementChild(node
);
2481 channel_attr_node
; channel_attr_node
=
2482 xmlNextElementSibling(channel_attr_node
)) {
2483 ret
= process_channel_attr_node(channel_attr_node
,
2484 channel
, &contexts_node
, &events_node
);
2490 ret
= lttng_enable_channel(handle
, channel
);
2495 /* Restore the original channel domain. */
2496 domain
.type
= original_domain
;
2498 ret
= process_events_node(events_node
, handle
, channel
->name
);
2503 ret
= process_contexts_node(contexts_node
, handle
,
2509 lttng_channel_destroy(channel
);
2513 /* get the trackers node */
2514 for (node
= xmlFirstElementChild(domain_node
); node
;
2515 node
= xmlNextElementSibling(node
)) {
2516 if (!strcmp((const char *) node
->name
,
2517 config_element_trackers
)) {
2518 trackers_node
= node
;
2523 if (!trackers_node
) {
2527 for (node
= xmlFirstElementChild(trackers_node
); node
;
2528 node
= xmlNextElementSibling(node
)) {
2529 if (!strcmp((const char *)node
->name
,config_element_pid_tracker
)) {
2530 pid_tracker_node
= node
;
2531 ret
= process_pid_tracker_node(pid_tracker_node
, handle
);
2538 if (!pid_tracker_node
) {
2539 lttng_track_pid(handle
, -1);
2543 lttng_channel_destroy(channel
);
2544 lttng_destroy_handle(handle
);
2549 int process_session_node(xmlNodePtr session_node
, const char *session_name
,
2551 const struct config_load_session_override_attr
*overrides
)
2553 int ret
, started
= -1, snapshot_mode
= -1;
2554 uint64_t live_timer_interval
= UINT64_MAX
,
2555 rotation_timer_interval
= 0,
2557 xmlChar
*name
= NULL
;
2558 xmlChar
*shm_path
= NULL
;
2559 xmlNodePtr domains_node
= NULL
;
2560 xmlNodePtr output_node
= NULL
;
2562 xmlNodePtr attributes_child
;
2563 struct lttng_domain
*kernel_domain
= NULL
;
2564 struct lttng_domain
*ust_domain
= NULL
;
2565 struct lttng_domain
*jul_domain
= NULL
;
2566 struct lttng_domain
*log4j_domain
= NULL
;
2567 struct lttng_domain
*python_domain
= NULL
;
2569 for (node
= xmlFirstElementChild(session_node
); node
;
2570 node
= xmlNextElementSibling(node
)) {
2571 if (!name
&& !strcmp((const char *) node
->name
,
2572 config_element_name
)) {
2574 xmlChar
*node_content
= xmlNodeGetContent(node
);
2575 if (!node_content
) {
2576 ret
= -LTTNG_ERR_NOMEM
;
2580 name
= node_content
;
2581 } else if (!domains_node
&& !strcmp((const char *) node
->name
,
2582 config_element_domains
)) {
2584 domains_node
= node
;
2585 } else if (started
== -1 && !strcmp((const char *) node
->name
,
2586 config_element_started
)) {
2588 xmlChar
*node_content
= xmlNodeGetContent(node
);
2589 if (!node_content
) {
2590 ret
= -LTTNG_ERR_NOMEM
;
2594 ret
= parse_bool(node_content
, &started
);
2597 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2600 } else if (!output_node
&& !strcmp((const char *) node
->name
,
2601 config_element_output
)) {
2604 } else if (!shm_path
&& !strcmp((const char *) node
->name
,
2605 config_element_shared_memory_path
)) {
2606 /* shared memory path */
2607 xmlChar
*node_content
= xmlNodeGetContent(node
);
2608 if (!node_content
) {
2609 ret
= -LTTNG_ERR_NOMEM
;
2613 shm_path
= node_content
;
2616 * attributes, snapshot_mode, live_timer_interval, rotation_size,
2617 * rotation_timer_interval.
2619 for (attributes_child
= xmlFirstElementChild(node
); attributes_child
;
2620 attributes_child
= xmlNextElementSibling(attributes_child
)) {
2621 if (!strcmp((const char *) attributes_child
->name
,
2622 config_element_snapshot_mode
)) {
2624 xmlChar
*snapshot_mode_content
=
2625 xmlNodeGetContent(attributes_child
);
2626 if (!snapshot_mode_content
) {
2627 ret
= -LTTNG_ERR_NOMEM
;
2631 ret
= parse_bool(snapshot_mode_content
, &snapshot_mode
);
2632 free(snapshot_mode_content
);
2634 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2637 } else if (!strcmp((const char *) attributes_child
->name
,
2638 config_element_live_timer_interval
)) {
2639 /* live_timer_interval */
2640 xmlChar
*timer_interval_content
=
2641 xmlNodeGetContent(attributes_child
);
2642 if (!timer_interval_content
) {
2643 ret
= -LTTNG_ERR_NOMEM
;
2647 ret
= parse_uint(timer_interval_content
, &live_timer_interval
);
2648 free(timer_interval_content
);
2650 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2654 if (!strcmp((const char *) attributes_child
->name
,
2655 config_element_rotation_timer_interval
)) {
2656 /* rotation_timer_interval */
2657 xmlChar
*timer_interval_content
=
2658 xmlNodeGetContent(attributes_child
);
2659 if (!timer_interval_content
) {
2660 ret
= -LTTNG_ERR_NOMEM
;
2664 ret
= parse_uint(timer_interval_content
, &rotation_timer_interval
);
2665 free(timer_interval_content
);
2667 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2671 if (!strcmp((const char *) attributes_child
->name
,
2672 config_element_rotation_size
)) {
2674 xmlChar
*rotation_size_content
=
2675 xmlNodeGetContent(attributes_child
);
2676 if (!rotation_size_content
) {
2677 ret
= -LTTNG_ERR_NOMEM
;
2681 ret
= parse_uint(rotation_size_content
, &rotation_size
);
2682 free(rotation_size_content
);
2684 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2693 /* Mandatory attribute, as defined in the session XSD */
2694 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2698 if (session_name
&& strcmp((char *) name
, session_name
)) {
2699 /* This is not the session we are looking for */
2700 ret
= -LTTNG_ERR_NO_SESSION
;
2704 /* Init domains to create the session handles */
2705 for (node
= xmlFirstElementChild(domains_node
); node
;
2706 node
= xmlNextElementSibling(node
)) {
2707 struct lttng_domain
*domain
;
2709 domain
= zmalloc(sizeof(*domain
));
2711 ret
= -LTTNG_ERR_NOMEM
;
2715 ret
= init_domain(node
, domain
);
2717 goto domain_init_error
;
2720 switch (domain
->type
) {
2721 case LTTNG_DOMAIN_KERNEL
:
2722 if (kernel_domain
) {
2723 /* Same domain seen twice, invalid! */
2724 goto domain_init_error
;
2726 kernel_domain
= domain
;
2728 case LTTNG_DOMAIN_UST
:
2730 /* Same domain seen twice, invalid! */
2731 goto domain_init_error
;
2733 ust_domain
= domain
;
2735 case LTTNG_DOMAIN_JUL
:
2737 /* Same domain seen twice, invalid! */
2738 goto domain_init_error
;
2740 jul_domain
= domain
;
2742 case LTTNG_DOMAIN_LOG4J
:
2744 /* Same domain seen twice, invalid! */
2745 goto domain_init_error
;
2747 log4j_domain
= domain
;
2749 case LTTNG_DOMAIN_PYTHON
:
2750 if (python_domain
) {
2751 /* Same domain seen twice, invalid! */
2752 goto domain_init_error
;
2754 python_domain
= domain
;
2757 WARN("Invalid domain type");
2758 goto domain_init_error
;
2763 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2767 /* Apply overrides */
2769 if (overrides
->session_name
) {
2770 xmlChar
*name_override
= xmlStrdup(BAD_CAST(overrides
->session_name
));
2771 if (!name_override
) {
2772 ret
= -LTTNG_ERR_NOMEM
;
2776 /* Overrides the session name to the provided name */
2778 name
= name_override
;
2783 /* Destroy session if it exists */
2784 ret
= lttng_destroy_session((const char *) name
);
2785 if (ret
&& ret
!= -LTTNG_ERR_SESS_NOT_FOUND
) {
2786 ERR("Failed to destroy existing session.");
2791 /* Create session type depending on output type */
2792 if (snapshot_mode
&& snapshot_mode
!= -1) {
2793 ret
= create_snapshot_session((const char *) name
, output_node
,
2795 } else if (live_timer_interval
&&
2796 live_timer_interval
!= UINT64_MAX
) {
2797 ret
= create_session((const char *) name
,
2798 output_node
, live_timer_interval
, overrides
);
2800 /* regular session */
2801 ret
= create_session((const char *) name
,
2802 output_node
, UINT64_MAX
, overrides
);
2809 ret
= lttng_set_session_shm_path((const char *) name
,
2810 (const char *) shm_path
);
2816 for (node
= xmlFirstElementChild(domains_node
); node
;
2817 node
= xmlNextElementSibling(node
)) {
2818 ret
= process_domain_node(node
, (const char *) name
);
2824 if (rotation_timer_interval
|| rotation_size
) {
2825 struct lttng_rotation_schedule_attr
*rotation_attr
= lttng_rotation_schedule_attr_create();
2827 if (!rotation_attr
) {
2830 ret
= lttng_rotation_schedule_attr_set_session_name(rotation_attr
, (const char *) name
);
2832 lttng_rotation_schedule_attr_destroy(rotation_attr
);
2835 lttng_rotation_schedule_attr_set_timer_period(rotation_attr
,
2836 rotation_timer_interval
);
2837 lttng_rotation_schedule_attr_set_size(rotation_attr
, rotation_size
);
2838 ret
= lttng_rotation_set_schedule(rotation_attr
);
2839 lttng_rotation_schedule_attr_destroy(rotation_attr
);
2846 ret
= lttng_start_tracing((const char *) name
);
2854 ERR("Failed to load session %s: %s", (const char *) name
,
2855 lttng_strerror(ret
));
2856 lttng_destroy_session((const char *) name
);
2860 free(kernel_domain
);
2864 free(python_domain
);
2871 * Return 1 if the given path is readable by the current UID or 0 if not.
2872 * Return -1 if the path is EPERM.
2874 static int validate_file_read_creds(const char *path
)
2880 /* Can we read the file. */
2881 ret
= access(path
, R_OK
);
2885 if (errno
== EACCES
) {
2896 int load_session_from_file(const char *path
, const char *session_name
,
2897 struct session_config_validation_ctx
*validation_ctx
, int overwrite
,
2898 const struct config_load_session_override_attr
*overrides
)
2900 int ret
, session_found
= !session_name
;
2901 xmlDocPtr doc
= NULL
;
2902 xmlNodePtr sessions_node
;
2903 xmlNodePtr session_node
;
2906 assert(validation_ctx
);
2908 ret
= validate_file_read_creds(path
);
2911 ret
= -LTTNG_ERR_EPERM
;
2913 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2918 doc
= xmlParseFile(path
);
2920 ret
= -LTTNG_ERR_LOAD_IO_FAIL
;
2924 ret
= xmlSchemaValidateDoc(validation_ctx
->schema_validation_ctx
, doc
);
2926 ERR("Session configuration file validation failed");
2927 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2931 sessions_node
= xmlDocGetRootElement(doc
);
2932 if (!sessions_node
) {
2936 for (session_node
= xmlFirstElementChild(sessions_node
);
2937 session_node
; session_node
=
2938 xmlNextElementSibling(session_node
)) {
2939 ret
= process_session_node(session_node
,
2940 session_name
, overwrite
, overrides
);
2941 if (session_name
&& ret
== 0) {
2942 /* Target session found and loaded */
2950 ret
= session_found
? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT
;
2955 /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */
2957 struct dirent
*alloc_dirent(const char *path
)
2961 struct dirent
*entry
;
2963 name_max
= pathconf(path
, _PC_NAME_MAX
);
2964 if (name_max
== -1) {
2965 name_max
= PATH_MAX
;
2967 len
= offsetof(struct dirent
, d_name
) + name_max
+ 1;
2968 entry
= zmalloc(len
);
2973 int load_session_from_path(const char *path
, const char *session_name
,
2974 struct session_config_validation_ctx
*validation_ctx
, int overwrite
,
2975 const struct config_load_session_override_attr
*overrides
)
2977 int ret
, session_found
= !session_name
;
2978 DIR *directory
= NULL
;
2981 assert(validation_ctx
);
2983 directory
= opendir(path
);
2987 /* Try the file loading. */
2990 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2993 ret
= -LTTNG_ERR_LOAD_IO_FAIL
;
2998 struct dirent
*entry
;
2999 struct dirent
*result
;
3000 char *file_path
= NULL
;
3001 size_t path_len
= strlen(path
);
3003 if (path_len
>= PATH_MAX
) {
3004 ret
= -LTTNG_ERR_INVALID
;
3008 entry
= alloc_dirent(path
);
3010 ret
= -LTTNG_ERR_NOMEM
;
3014 file_path
= zmalloc(PATH_MAX
);
3016 ret
= -LTTNG_ERR_NOMEM
;
3021 strncpy(file_path
, path
, path_len
);
3022 if (file_path
[path_len
- 1] != '/') {
3023 file_path
[path_len
++] = '/';
3027 /* Search for *.lttng files */
3028 while (!readdir_r(directory
, entry
, &result
) && result
) {
3029 size_t file_name_len
= strlen(result
->d_name
);
3031 if (file_name_len
<=
3032 sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
)) {
3036 if (path_len
+ file_name_len
>= PATH_MAX
) {
3040 if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
,
3041 result
->d_name
+ file_name_len
- sizeof(
3042 DEFAULT_SESSION_CONFIG_FILE_EXTENSION
) + 1)) {
3046 strncpy(file_path
+ path_len
, result
->d_name
, file_name_len
);
3047 file_path
[path_len
+ file_name_len
] = '\0';
3049 ret
= load_session_from_file(file_path
, session_name
,
3050 validation_ctx
, overwrite
, overrides
);
3051 if (session_name
&& !ret
) {
3060 ret
= load_session_from_file(path
, session_name
,
3061 validation_ctx
, overwrite
, overrides
);
3071 if (closedir(directory
)) {
3076 if (session_found
&& !ret
) {
3084 * Validate that the given path's credentials and the current process have the
3085 * same UID. If so, return 1 else return 0 if it does NOT match.
3087 static int validate_path_creds(const char *path
)
3089 int ret
, uid
= getuid();
3098 ret
= stat(path
, &buf
);
3100 if (errno
!= ENOENT
) {
3106 if (buf
.st_uid
!= uid
) {
3117 int config_load_session(const char *path
, const char *session_name
,
3118 int overwrite
, unsigned int autoload
,
3119 const struct config_load_session_override_attr
*overrides
)
3122 bool session_loaded
= false;
3123 const char *path_ptr
= NULL
;
3124 struct session_config_validation_ctx validation_ctx
= { 0 };
3126 ret
= init_session_config_validation_ctx(&validation_ctx
);
3133 const char *sys_path
;
3136 home_path
= utils_get_home_dir();
3138 char path
[PATH_MAX
];
3141 * Try user session configuration path. Ignore error here so we can
3142 * continue loading the system wide sessions.
3145 ret
= snprintf(path
, sizeof(path
),
3146 DEFAULT_SESSION_HOME_CONFIGPATH
"/"
3147 DEFAULT_SESSION_CONFIG_AUTOLOAD
, home_path
);
3149 PERROR("snprintf session autoload home config path");
3154 * Credentials are only validated for the autoload in order to
3155 * avoid any user session daemon to try to load kernel sessions
3156 * automatically and failing all the times.
3158 ret
= validate_path_creds(path
);
3163 ret
= snprintf(path
, sizeof(path
),
3164 DEFAULT_SESSION_HOME_CONFIGPATH
, home_path
);
3166 PERROR("snprintf session home config path");
3172 ret
= load_session_from_path(path_ptr
, session_name
,
3173 &validation_ctx
, overwrite
, overrides
);
3174 if (ret
&& ret
!= -LTTNG_ERR_LOAD_SESSION_NOENT
) {
3178 * Continue even if the session was found since we have to try
3179 * the system wide sessions.
3181 session_loaded
= true;
3185 /* Reset path pointer for the system wide dir. */
3188 /* Try system wide configuration directory. */
3190 sys_path
= DEFAULT_SESSION_SYSTEM_CONFIGPATH
"/"
3191 DEFAULT_SESSION_CONFIG_AUTOLOAD
;
3192 ret
= validate_path_creds(sys_path
);
3194 path_ptr
= sys_path
;
3197 sys_path
= DEFAULT_SESSION_SYSTEM_CONFIGPATH
;
3198 path_ptr
= sys_path
;
3202 ret
= load_session_from_path(path_ptr
, session_name
,
3203 &validation_ctx
, overwrite
, overrides
);
3205 session_loaded
= true;
3209 ret
= access(path
, F_OK
);
3214 ret
= -LTTNG_ERR_INVALID
;
3215 WARN("Session configuration path does not exist.");
3218 ret
= -LTTNG_ERR_EPERM
;
3221 ret
= -LTTNG_ERR_UNK
;
3227 ret
= load_session_from_path(path
, session_name
,
3228 &validation_ctx
, overwrite
, overrides
);
3231 fini_session_config_validation_ctx(&validation_ctx
);
3232 if (ret
== -LTTNG_ERR_LOAD_SESSION_NOENT
&& !session_name
&& !path
) {
3234 * Don't report an error if no sessions are found when called
3235 * without a session_name or a search path.
3240 if (session_loaded
&& ret
== -LTTNG_ERR_LOAD_SESSION_NOENT
) {
3241 /* A matching session was found in one of the search paths. */
3248 void __attribute__((destructor
)) session_config_exit(void)