+++ /dev/null
-/*
- * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#include "lttng/tracker.h"
-#define _LGPL_SOURCE
-#include <ctype.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <inttypes.h>
-#include <dirent.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <stdbool.h>
-
-#include <common/defaults.h>
-#include <common/error.h>
-#include <common/macros.h>
-#include <common/utils.h>
-#include <common/dynamic-buffer.h>
-#include <common/compat/getenv.h>
-#include <lttng/lttng-error.h>
-#include <libxml/parser.h>
-#include <libxml/valid.h>
-#include <libxml/xmlschemas.h>
-#include <libxml/tree.h>
-#include <lttng/lttng.h>
-#include <lttng/snapshot.h>
-#include <lttng/rotation.h>
-#include <lttng/userspace-probe.h>
-
-#include "session-config.h"
-#include "config-internal.h"
-
-#define CONFIG_USERSPACE_PROBE_LOOKUP_METHOD_NAME_MAX_LEN 7
-
-struct handler_filter_args {
- const char* section;
- config_entry_handler_cb handler;
- void *user_data;
-};
-
-struct session_config_validation_ctx {
- xmlSchemaParserCtxtPtr parser_ctx;
- xmlSchemaPtr schema;
- xmlSchemaValidCtxtPtr schema_validation_ctx;
-};
-
-const char * const config_element_all = "all";
-LTTNG_EXPORT const char * const config_str_yes = "yes";
-LTTNG_EXPORT const char * const config_str_true = "true";
-LTTNG_EXPORT const char * const config_str_on = "on";
-LTTNG_EXPORT const char * const config_str_no = "no";
-LTTNG_EXPORT const char * const config_str_false = "false";
-LTTNG_EXPORT const char * const config_str_off = "off";
-LTTNG_EXPORT const char * const config_xml_encoding = "UTF-8";
-LTTNG_EXPORT const size_t config_xml_encoding_bytes_per_char = 2; /* Size of the encoding's largest character */
-LTTNG_EXPORT const char * const config_xml_indent_string = "\t";
-LTTNG_EXPORT const char * const config_xml_true = "true";
-LTTNG_EXPORT const char * const config_xml_false = "false";
-
-const char * const config_element_channel = "channel";
-const char * const config_element_channels = "channels";
-const char * const config_element_domain = "domain";
-const char * const config_element_domains = "domains";
-const char * const config_element_event = "event";
-const char * const config_element_events = "events";
-const char * const config_element_context = "context";
-const char * const config_element_contexts = "contexts";
-const char * const config_element_attributes = "attributes";
-const char * const config_element_exclusion = "exclusion";
-const char * const config_element_exclusions = "exclusions";
-const char * const config_element_function_attributes = "function_attributes";
-const char * const config_element_probe_attributes = "probe_attributes";
-const char * const config_element_symbol_name = "symbol_name";
-const char * const config_element_address = "address";
-const char * const config_element_offset = "offset";
-
-const char * const config_element_userspace_probe_lookup = "lookup_method";
-const char * const config_element_userspace_probe_lookup_function_default = "DEFAULT";
-const char * const config_element_userspace_probe_lookup_function_elf = "ELF";
-const char * const config_element_userspace_probe_lookup_tracepoint_sdt = "SDT";
-const char * const config_element_userspace_probe_location_binary_path = "binary_path";
-const char * const config_element_userspace_probe_function_attributes = "userspace_probe_function_attributes";
-const char * const config_element_userspace_probe_function_location_function_name = "function_name";
-const char * const config_element_userspace_probe_tracepoint_attributes = "userspace_probe_tracepoint_attributes";
-const char * const config_element_userspace_probe_tracepoint_location_provider_name = "provider_name";
-const char * const config_element_userspace_probe_tracepoint_location_probe_name = "probe_name";
-
-const char * const config_element_name = "name";
-const char * const config_element_enabled = "enabled";
-const char * const config_element_overwrite_mode = "overwrite_mode";
-const char * const config_element_subbuf_size = "subbuffer_size";
-const char * const config_element_num_subbuf = "subbuffer_count";
-const char * const config_element_switch_timer_interval = "switch_timer_interval";
-const char * const config_element_read_timer_interval = "read_timer_interval";
-const char * const config_element_monitor_timer_interval = "monitor_timer_interval";
-const char * const config_element_blocking_timeout = "blocking_timeout";
-const char * const config_element_output = "output";
-const char * const config_element_output_type = "output_type";
-const char * const config_element_tracefile_size = "tracefile_size";
-const char * const config_element_tracefile_count = "tracefile_count";
-const char * const config_element_live_timer_interval = "live_timer_interval";
-const char * const config_element_discarded_events = "discarded_events";
-const char * const config_element_lost_packets = "lost_packets";
-const char * const config_element_type = "type";
-const char * const config_element_buffer_type = "buffer_type";
-const char * const config_element_session = "session";
-const char * const config_element_sessions = "sessions";
-const char * const config_element_context_perf = "perf";
-const char * const config_element_context_app = "app";
-const char * const config_element_context_app_provider_name = "provider_name";
-const char * const config_element_context_app_ctx_name = "ctx_name";
-const char * const config_element_config = "config";
-const char * const config_element_started = "started";
-const char * const config_element_snapshot_mode = "snapshot_mode";
-const char * const config_element_loglevel = "loglevel";
-const char * const config_element_loglevel_type = "loglevel_type";
-const char * const config_element_filter = "filter";
-const char * const config_element_filter_expression = "filter_expression";
-const char * const config_element_snapshot_outputs = "snapshot_outputs";
-const char * const config_element_consumer_output = "consumer_output";
-const char * const config_element_destination = "destination";
-const char * const config_element_path = "path";
-const char * const config_element_net_output = "net_output";
-const char * const config_element_control_uri = "control_uri";
-const char * const config_element_data_uri = "data_uri";
-const char * const config_element_max_size = "max_size";
-const char * const config_element_pid = "pid";
-const char * const config_element_pids = "pids";
-const char * const config_element_shared_memory_path = "shared_memory_path";
-
-const char * const config_element_process_attr_id = "id";
-const char * const config_element_process_attr_tracker_pid = "pid_process_attr_tracker";
-const char * const config_element_process_attr_tracker_vpid = "vpid_process_attr_tracker";
-const char * const config_element_process_attr_tracker_uid = "uid_process_attr_tracker";
-const char * const config_element_process_attr_tracker_vuid = "vuid_process_attr_tracker";
-const char * const config_element_process_attr_tracker_gid = "gid_process_attr_tracker";
-const char * const config_element_process_attr_tracker_vgid = "vgid_process_attr_tracker";
-const char * const config_element_process_attr_trackers = "process_attr_trackers";
-const char * const config_element_process_attr_values = "process_attr_values";
-const char * const config_element_process_attr_value_type = "process_attr_value_type";
-const char * const config_element_process_attr_pid_value = "pid";
-const char * const config_element_process_attr_vpid_value = "vpid";
-const char * const config_element_process_attr_uid_value = "uid";
-const char * const config_element_process_attr_vuid_value = "vuid";
-const char * const config_element_process_attr_gid_value = "gid";
-const char * const config_element_process_attr_vgid_value = "vgid";
-const char * const config_element_process_attr_tracker_type = "process_attr_tracker_type";
-
-/* Used for support of legacy tracker serialization (< 2.12). */
-const char * const config_element_trackers_legacy = "trackers";
-const char * const config_element_pid_tracker_legacy = "pid_tracker";
-const char * const config_element_tracker_targets_legacy = "targets";
-const char * const config_element_tracker_pid_target_legacy = "pid_target";
-const char * const config_element_tracker_pid_legacy = "pid";
-
-const char * const config_element_rotation_schedules = "rotation_schedules";
-const char * const config_element_rotation_schedule_periodic = "periodic";
-const char * const config_element_rotation_schedule_periodic_time_us = "time_us";
-const char * const config_element_rotation_schedule_size_threshold = "size_threshold";
-const char * const config_element_rotation_schedule_size_threshold_bytes = "bytes";
-
-const char * const config_domain_type_kernel = "KERNEL";
-const char * const config_domain_type_ust = "UST";
-const char * const config_domain_type_jul = "JUL";
-const char * const config_domain_type_log4j = "LOG4J";
-const char * const config_domain_type_python = "PYTHON";
-
-const char * const config_buffer_type_per_pid = "PER_PID";
-const char * const config_buffer_type_per_uid = "PER_UID";
-const char * const config_buffer_type_global = "GLOBAL";
-
-const char * const config_overwrite_mode_discard = "DISCARD";
-const char * const config_overwrite_mode_overwrite = "OVERWRITE";
-
-const char * const config_output_type_splice = "SPLICE";
-const char * const config_output_type_mmap = "MMAP";
-
-const char * const config_loglevel_type_all = "ALL";
-const char * const config_loglevel_type_range = "RANGE";
-const char * const config_loglevel_type_single = "SINGLE";
-
-const char * const config_event_type_all = "ALL";
-const char * const config_event_type_tracepoint = "TRACEPOINT";
-const char * const config_event_type_probe = "PROBE";
-const char * const config_event_type_userspace_probe = "USERSPACE_PROBE";
-const char * const config_event_type_function = "FUNCTION";
-const char * const config_event_type_function_entry = "FUNCTION_ENTRY";
-const char * const config_event_type_noop = "NOOP";
-const char * const config_event_type_syscall = "SYSCALL";
-const char * const config_event_type_kprobe = "KPROBE";
-const char * const config_event_type_kretprobe = "KRETPROBE";
-
-const char * const config_event_context_pid = "PID";
-const char * const config_event_context_procname = "PROCNAME";
-const char * const config_event_context_prio = "PRIO";
-const char * const config_event_context_nice = "NICE";
-const char * const config_event_context_vpid = "VPID";
-const char * const config_event_context_tid = "TID";
-const char * const config_event_context_vtid = "VTID";
-const char * const config_event_context_ppid = "PPID";
-const char * const config_event_context_vppid = "VPPID";
-const char * const config_event_context_pthread_id = "PTHREAD_ID";
-const char * const config_event_context_hostname = "HOSTNAME";
-const char * const config_event_context_ip = "IP";
-const char * const config_event_context_perf_thread_counter = "PERF_THREAD_COUNTER";
-const char * const config_event_context_app = "APP";
-const char * const config_event_context_interruptible = "INTERRUPTIBLE";
-const char * const config_event_context_preemptible = "PREEMPTIBLE";
-const char * const config_event_context_need_reschedule = "NEED_RESCHEDULE";
-const char * const config_event_context_migratable = "MIGRATABLE";
-const char * const config_event_context_callstack_user= "CALLSTACK_USER";
-const char * const config_event_context_callstack_kernel = "CALLSTACK_KERNEL";
-const char * const config_event_context_cgroup_ns = "CGROUP_NS";
-const char * const config_event_context_ipc_ns = "IPC_NS";
-const char * const config_event_context_mnt_ns = "MNT_NS";
-const char * const config_event_context_net_ns = "NET_NS";
-const char * const config_event_context_pid_ns = "PID_NS";
-const char * const config_event_context_time_ns = "TIME_NS";
-const char * const config_event_context_user_ns = "USER_NS";
-const char * const config_event_context_uts_ns = "UTS_NS";
-const char * const config_event_context_uid = "UID";
-const char * const config_event_context_euid = "EUID";
-const char * const config_event_context_suid = "SUID";
-const char * const config_event_context_gid = "GID";
-const char * const config_event_context_egid = "EGID";
-const char * const config_event_context_sgid = "SGID";
-const char * const config_event_context_vuid = "VUID";
-const char * const config_event_context_veuid = "VEUID";
-const char * const config_event_context_vsuid = "VSUID";
-const char * const config_event_context_vgid = "VGID";
-const char * const config_event_context_vegid = "VEGID";
-const char * const config_event_context_vsgid = "VSGID";
-
-/* Deprecated symbols */
-LTTNG_EXPORT const char * const config_element_perf;
-
-enum process_event_node_phase {
- CREATION = 0,
- ENABLE = 1,
-};
-
-struct consumer_output {
- int enabled;
- char *path;
- char *control_uri;
- char *data_uri;
-};
-
-static int config_entry_handler_filter(struct handler_filter_args *args,
- const char *section, const char *name, const char *value)
-{
- int ret = 0;
- struct config_entry entry = { section, name, value };
-
- LTTNG_ASSERT(args);
-
- if (!section || !name || !value) {
- ret = -EIO;
- goto end;
- }
-
- if (args->section) {
- if (strcmp(args->section, section)) {
- goto end;
- }
- }
-
- ret = args->handler(&entry, args->user_data);
-end:
- return ret;
-}
-
-int config_get_section_entries(const char *override_path, const char *section,
- config_entry_handler_cb handler, void *user_data)
-{
- int ret = 0;
- const char *path;
- FILE *config_file = NULL;
- struct handler_filter_args filter = { section, handler, user_data };
-
- /* First, try system-wide conf. file. */
- path = DEFAULT_DAEMON_SYSTEM_CONFIGPATH;
-
- config_file = fopen(path, "r");
- if (config_file) {
- DBG("Loading daemon conf file at %s", path);
- /*
- * Return value is not very important here since error or not, we
- * continue and try the next possible conf. file.
- */
- (void) ini_parse_file(config_file,
- (ini_entry_handler) config_entry_handler_filter,
- (void *) &filter);
- fclose(config_file);
- }
-
- /* Second is the user local configuration. */
- path = utils_get_home_dir();
- if (path) {
- char fullpath[PATH_MAX];
-
- ret = snprintf(fullpath, sizeof(fullpath),
- DEFAULT_DAEMON_HOME_CONFIGPATH, path);
- if (ret < 0) {
- PERROR("snprintf user conf. path");
- goto error;
- }
-
- config_file = fopen(fullpath, "r");
- if (config_file) {
- DBG("Loading daemon user conf file at %s", path);
- /*
- * Return value is not very important here since error or not, we
- * continue and try the next possible conf. file.
- */
- (void) ini_parse_file(config_file,
- (ini_entry_handler) config_entry_handler_filter,
- (void *) &filter);
- fclose(config_file);
- }
- }
-
- /* Final path is the one that the user might have provided. */
- if (override_path) {
- config_file = fopen(override_path, "r");
- if (config_file) {
- DBG("Loading daemon command line conf file at %s", override_path);
- (void) ini_parse_file(config_file,
- (ini_entry_handler) config_entry_handler_filter,
- (void *) &filter);
- fclose(config_file);
- } else {
- ERR("Failed to open daemon configuration file at %s",
- override_path);
- ret = -ENOENT;
- goto error;
- }
- }
-
- /* Everything went well. */
- ret = 0;
-
-error:
- return ret;
-}
-
-int config_parse_value(const char *value)
-{
- int i, ret = 0;
- char *endptr, *lower_str;
- size_t len;
- unsigned long v;
-
- len = strlen(value);
- if (!len) {
- ret = -1;
- goto end;
- }
-
- v = strtoul(value, &endptr, 10);
- if (endptr != value) {
- ret = v;
- goto end;
- }
-
- lower_str = zmalloc(len + 1);
- if (!lower_str) {
- PERROR("zmalloc");
- ret = -errno;
- goto end;
- }
-
- for (i = 0; i < len; i++) {
- lower_str[i] = tolower(value[i]);
- }
-
- if (!strcmp(lower_str, config_str_yes) ||
- !strcmp(lower_str, config_str_true) ||
- !strcmp(lower_str, config_str_on)) {
- ret = 1;
- } else if (!strcmp(lower_str, config_str_no) ||
- !strcmp(lower_str, config_str_false) ||
- !strcmp(lower_str, config_str_off)) {
- ret = 0;
- } else {
- ret = -1;
- }
-
- free(lower_str);
-end:
- return ret;
-}
-
-/*
- * Returns a xmlChar string which must be released using xmlFree().
- */
-static xmlChar *encode_string(const char *in_str)
-{
- xmlChar *out_str = NULL;
- xmlCharEncodingHandlerPtr handler;
- int out_len, ret, in_len;
-
- LTTNG_ASSERT(in_str);
-
- handler = xmlFindCharEncodingHandler(config_xml_encoding);
- if (!handler) {
- ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!");
- goto end;
- }
-
- in_len = strlen(in_str);
- /*
- * Add 1 byte for the NULL terminted character. The factor 4 here is
- * used because UTF-8 characters can take up to 4 bytes.
- */
- out_len = (in_len * 4) + 1;
- out_str = xmlMalloc(out_len);
- if (!out_str) {
- goto end;
- }
-
- ret = handler->input(out_str, &out_len, (const xmlChar *) in_str, &in_len);
- if (ret < 0) {
- xmlFree(out_str);
- out_str = NULL;
- goto end;
- }
-
- /* out_len is now the size of out_str */
- out_str[out_len] = '\0';
-end:
- return out_str;
-}
-
-struct config_writer *config_writer_create(int fd_output, int indent)
-{
- int ret;
- struct config_writer *writer;
- xmlOutputBufferPtr buffer;
-
- writer = zmalloc(sizeof(struct config_writer));
- if (!writer) {
- PERROR("zmalloc config_writer_create");
- goto end;
- }
-
- buffer = xmlOutputBufferCreateFd(fd_output, NULL);
- if (!buffer) {
- goto error_destroy;
- }
-
- writer->writer = xmlNewTextWriter(buffer);
- ret = xmlTextWriterStartDocument(writer->writer, NULL,
- config_xml_encoding, NULL);
- if (ret < 0) {
- goto error_destroy;
- }
-
- ret = xmlTextWriterSetIndentString(writer->writer,
- BAD_CAST config_xml_indent_string);
- if (ret) {
- goto error_destroy;
- }
-
- ret = xmlTextWriterSetIndent(writer->writer, indent);
- if (ret) {
- goto error_destroy;
- }
-
-end:
- return writer;
-error_destroy:
- config_writer_destroy(writer);
- return NULL;
-}
-
-int config_writer_destroy(struct config_writer *writer)
-{
- int ret = 0;
-
- if (!writer) {
- ret = -EINVAL;
- goto end;
- }
-
- if (xmlTextWriterEndDocument(writer->writer) < 0) {
- WARN("Could not close XML document");
- ret = -EIO;
- }
-
- if (writer->writer) {
- xmlFreeTextWriter(writer->writer);
- }
-
- free(writer);
-end:
- return ret;
-}
-
-int config_writer_open_element(struct config_writer *writer,
- const char *element_name)
-{
- int ret;
- xmlChar *encoded_element_name;
-
- if (!writer || !writer->writer || !element_name || !element_name[0]) {
- ret = -1;
- goto end;
- }
-
- encoded_element_name = encode_string(element_name);
- if (!encoded_element_name) {
- ret = -1;
- goto end;
- }
-
- ret = xmlTextWriterStartElement(writer->writer, encoded_element_name);
- xmlFree(encoded_element_name);
-end:
- return ret >= 0 ? 0 : ret;
-}
-
-int config_writer_write_attribute(struct config_writer *writer,
- const char *name, const char *value)
-{
- int ret;
- xmlChar *encoded_name = NULL;
- xmlChar *encoded_value = NULL;
-
- if (!writer || !writer->writer || !name || !name[0]) {
- ret = -1;
- goto end;
- }
-
- encoded_name = encode_string(name);
- if (!encoded_name) {
- ret = -1;
- goto end;
- }
-
- encoded_value = encode_string(value);
- if (!encoded_value) {
- ret = -1;
- goto end;
- }
-
- ret = xmlTextWriterWriteAttribute(writer->writer, encoded_name,
- encoded_value);
-end:
- xmlFree(encoded_name);
- xmlFree(encoded_value);
- return ret >= 0 ? 0 : ret;
-}
-
-int config_writer_close_element(struct config_writer *writer)
-{
- int ret;
-
- if (!writer || !writer->writer) {
- ret = -1;
- goto end;
- }
-
- ret = xmlTextWriterEndElement(writer->writer);
-end:
- return ret >= 0 ? 0 : ret;
-}
-
-int config_writer_write_element_unsigned_int(struct config_writer *writer,
- const char *element_name, uint64_t value)
-{
- int ret;
- xmlChar *encoded_element_name;
-
- if (!writer || !writer->writer || !element_name || !element_name[0]) {
- ret = -1;
- goto end;
- }
-
- encoded_element_name = encode_string(element_name);
- if (!encoded_element_name) {
- ret = -1;
- goto end;
- }
-
- ret = xmlTextWriterWriteFormatElement(writer->writer,
- encoded_element_name, "%" PRIu64, value);
- xmlFree(encoded_element_name);
-end:
- return ret >= 0 ? 0 : ret;
-}
-
-int config_writer_write_element_signed_int(struct config_writer *writer,
- const char *element_name, int64_t value)
-{
- int ret;
- xmlChar *encoded_element_name;
-
- if (!writer || !writer->writer || !element_name || !element_name[0]) {
- ret = -1;
- goto end;
- }
-
- encoded_element_name = encode_string(element_name);
- if (!encoded_element_name) {
- ret = -1;
- goto end;
- }
-
- ret = xmlTextWriterWriteFormatElement(writer->writer,
- encoded_element_name, "%" PRIi64, value);
- xmlFree(encoded_element_name);
-end:
- return ret >= 0 ? 0 : ret;
-}
-
-int config_writer_write_element_bool(struct config_writer *writer,
- const char *element_name, int value)
-{
- return config_writer_write_element_string(writer, element_name,
- value ? config_xml_true : config_xml_false);
-}
-
-int config_writer_write_element_double(struct config_writer *writer,
- const char *element_name,
- double value)
-{
- int ret;
- xmlChar *encoded_element_name;
-
- if (!writer || !writer->writer || !element_name || !element_name[0]) {
- ret = -1;
- goto end;
- }
-
- encoded_element_name = encode_string(element_name);
- if (!encoded_element_name) {
- ret = -1;
- goto end;
- }
-
- ret = xmlTextWriterWriteFormatElement(
- writer->writer, encoded_element_name, "%f", value);
- xmlFree(encoded_element_name);
-end:
- return ret >= 0 ? 0 : ret;
-}
-
-int config_writer_write_element_string(struct config_writer *writer,
- const char *element_name, const char *value)
-{
- int ret;
- xmlChar *encoded_element_name = NULL;
- xmlChar *encoded_value = NULL;
-
- if (!writer || !writer->writer || !element_name || !element_name[0] ||
- !value) {
- ret = -1;
- goto end;
- }
-
- encoded_element_name = encode_string(element_name);
- if (!encoded_element_name) {
- ret = -1;
- goto end;
- }
-
- encoded_value = encode_string(value);
- if (!encoded_value) {
- ret = -1;
- goto end;
- }
-
- ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name,
- encoded_value);
-end:
- xmlFree(encoded_element_name);
- xmlFree(encoded_value);
- return ret >= 0 ? 0 : ret;
-}
-
-static
-void xml_error_handler(void *ctx, const char *format, ...)
-{
- char *errMsg;
- va_list args;
- int ret;
-
- va_start(args, format);
- ret = vasprintf(&errMsg, format, args);
- va_end(args);
- if (ret == -1) {
- ERR("String allocation failed in xml error handler");
- return;
- }
-
- fprintf(stderr, "XML Error: %s", errMsg);
- free(errMsg);
-}
-
-static
-void fini_session_config_validation_ctx(
- struct session_config_validation_ctx *ctx)
-{
- if (ctx->parser_ctx) {
- xmlSchemaFreeParserCtxt(ctx->parser_ctx);
- }
-
- if (ctx->schema) {
- xmlSchemaFree(ctx->schema);
- }
-
- if (ctx->schema_validation_ctx) {
- xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx);
- }
-
- memset(ctx, 0, sizeof(struct session_config_validation_ctx));
-}
-
-static
-char *get_session_config_xsd_path(void)
-{
- char *xsd_path;
- const char *base_path = lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV);
- size_t base_path_len;
- size_t max_path_len;
-
- if (!base_path) {
- base_path = DEFAULT_SESSION_CONFIG_XSD_PATH;
- }
-
- base_path_len = strlen(base_path);
- max_path_len = base_path_len +
- sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1;
- xsd_path = zmalloc(max_path_len);
- if (!xsd_path) {
- goto end;
- }
-
- strcpy(xsd_path, base_path);
- if (xsd_path[base_path_len - 1] != '/') {
- xsd_path[base_path_len++] = '/';
- }
-
- strcpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME);
-end:
- return xsd_path;
-}
-
-static
-int init_session_config_validation_ctx(
- struct session_config_validation_ctx *ctx)
-{
- int ret;
- char *xsd_path = get_session_config_xsd_path();
-
- if (!xsd_path) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path);
- if (!ctx->parser_ctx) {
- ERR("XSD parser context creation failed");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler,
- xml_error_handler, NULL);
-
- ctx->schema = xmlSchemaParse(ctx->parser_ctx);
- if (!ctx->schema) {
- ERR("XSD parsing failed");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema);
- if (!ctx->schema_validation_ctx) {
- ERR("XSD validation context creation failed");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- xmlSchemaSetValidErrors(ctx->schema_validation_ctx, xml_error_handler,
- xml_error_handler, NULL);
- ret = 0;
-
-end:
- if (ret) {
- fini_session_config_validation_ctx(ctx);
- }
-
- free(xsd_path);
- return ret;
-}
-
-static
-int parse_uint(xmlChar *str, uint64_t *val)
-{
- int ret;
- char *endptr;
-
- if (!str || !val) {
- ret = -1;
- goto end;
- }
-
- *val = strtoull((const char *) str, &endptr, 10);
- if (!endptr || *endptr) {
- ret = -1;
- } else {
- ret = 0;
- }
-
-end:
- return ret;
-}
-
-static
-int parse_int(xmlChar *str, int64_t *val)
-{
- int ret;
- char *endptr;
-
- if (!str || !val) {
- ret = -1;
- goto end;
- }
-
- *val = strtoll((const char *) str, &endptr, 10);
- if (!endptr || *endptr) {
- ret = -1;
- } else {
- ret = 0;
- }
-
-end:
- return ret;
-}
-
-static
-int parse_bool(xmlChar *str, int *val)
-{
- int ret = 0;
-
- if (!str || !val) {
- ret = -1;
- goto end;
- }
-
- if (!strcmp((const char *) str, config_xml_true) ||
- !strcmp((const char *) str, "1")) {
- *val = 1;
- } else if (!strcmp((const char *) str, config_xml_false) ||
- !strcmp((const char *) str, "0")) {
- *val = 0;
- } else {
- WARN("Invalid boolean value encountered (%s).",
- (const char *) str);
- ret = -1;
- }
-end:
- return ret;
-}
-
-static
-int get_domain_type(xmlChar *domain)
-{
- int ret;
-
- if (!domain) {
- goto error;
- }
-
- if (!strcmp((char *) domain, config_domain_type_kernel)) {
- ret = LTTNG_DOMAIN_KERNEL;
- } else if (!strcmp((char *) domain, config_domain_type_ust)) {
- ret = LTTNG_DOMAIN_UST;
- } else if (!strcmp((char *) domain, config_domain_type_jul)) {
- ret = LTTNG_DOMAIN_JUL;
- } else if (!strcmp((char *) domain, config_domain_type_log4j)) {
- ret = LTTNG_DOMAIN_LOG4J;
- } else if (!strcmp((char *) domain, config_domain_type_python)) {
- ret = LTTNG_DOMAIN_PYTHON;
- } else {
- goto error;
- }
-
- return ret;
-error:
- return -1;
-}
-
-static
-int get_buffer_type(xmlChar *buffer_type)
-{
- int ret;
-
- if (!buffer_type) {
- goto error;
- }
-
- if (!strcmp((char *) buffer_type, config_buffer_type_global)) {
- ret = LTTNG_BUFFER_GLOBAL;
- } else if (!strcmp((char *) buffer_type, config_buffer_type_per_uid)) {
- ret = LTTNG_BUFFER_PER_UID;
- } else if (!strcmp((char *) buffer_type, config_buffer_type_per_pid)) {
- ret = LTTNG_BUFFER_PER_PID;
- } else {
- goto error;
- }
-
- return ret;
-error:
- return -1;
-}
-
-static
-int get_overwrite_mode(xmlChar *overwrite_mode)
-{
- int ret;
-
- if (!overwrite_mode) {
- goto error;
- }
-
- if (!strcmp((char *) overwrite_mode, config_overwrite_mode_overwrite)) {
- ret = 1;
- } else if (!strcmp((char *) overwrite_mode,
- config_overwrite_mode_discard)) {
- ret = 0;
- } else {
- goto error;
- }
-
- return ret;
-error:
- return -1;
-}
-
-static
-int get_output_type(xmlChar *output_type)
-{
- int ret;
-
- if (!output_type) {
- goto error;
- }
-
- if (!strcmp((char *) output_type, config_output_type_mmap)) {
- ret = LTTNG_EVENT_MMAP;
- } else if (!strcmp((char *) output_type, config_output_type_splice)) {
- ret = LTTNG_EVENT_SPLICE;
- } else {
- goto error;
- }
-
- return ret;
-error:
- return -1;
-}
-
-static
-int get_event_type(xmlChar *event_type)
-{
- int ret;
-
- if (!event_type) {
- goto error;
- }
-
- if (!strcmp((char *) event_type, config_event_type_all)) {
- ret = LTTNG_EVENT_ALL;
- } else if (!strcmp((char *) event_type, config_event_type_tracepoint)) {
- ret = LTTNG_EVENT_TRACEPOINT;
- } else if (!strcmp((char *) event_type, config_event_type_probe)) {
- ret = LTTNG_EVENT_PROBE;
- } else if (!strcmp((char *) event_type,
- config_event_type_userspace_probe)) {
- ret = LTTNG_EVENT_USERSPACE_PROBE;
- } else if (!strcmp((char *) event_type, config_event_type_function)) {
- ret = LTTNG_EVENT_FUNCTION;
- } else if (!strcmp((char *) event_type,
- config_event_type_function_entry)) {
- ret = LTTNG_EVENT_FUNCTION_ENTRY;
- } else if (!strcmp((char *) event_type, config_event_type_noop)) {
- ret = LTTNG_EVENT_NOOP;
- } else if (!strcmp((char *) event_type, config_event_type_syscall)) {
- ret = LTTNG_EVENT_SYSCALL;
- } else {
- goto error;
- }
-
- return ret;
-error:
- return -1;
-}
-
-static
-int get_loglevel_type(xmlChar *loglevel_type)
-{
- int ret;
-
- if (!loglevel_type) {
- goto error;
- }
-
- if (!strcmp((char *) loglevel_type, config_loglevel_type_all)) {
- ret = LTTNG_EVENT_LOGLEVEL_ALL;
- } else if (!strcmp((char *) loglevel_type,
- config_loglevel_type_range)) {
- ret = LTTNG_EVENT_LOGLEVEL_RANGE;
- } else if (!strcmp((char *) loglevel_type,
- config_loglevel_type_single)) {
- ret = LTTNG_EVENT_LOGLEVEL_SINGLE;
- } else {
- goto error;
- }
-
- return ret;
-error:
- return -1;
-}
-
-/*
- * Return the context type or -1 on error.
- */
-static
-int get_context_type(xmlChar *context_type)
-{
- int ret;
-
- if (!context_type) {
- goto error;
- }
-
- if (!strcmp((char *) context_type, config_event_context_pid)) {
- ret = LTTNG_EVENT_CONTEXT_PID;
- } else if (!strcmp((char *) context_type,
- config_event_context_procname)) {
- ret = LTTNG_EVENT_CONTEXT_PROCNAME;
- } else if (!strcmp((char *) context_type,
- config_event_context_prio)) {
- ret = LTTNG_EVENT_CONTEXT_PRIO;
- } else if (!strcmp((char *) context_type,
- config_event_context_nice)) {
- ret = LTTNG_EVENT_CONTEXT_NICE;
- } else if (!strcmp((char *) context_type,
- config_event_context_vpid)) {
- ret = LTTNG_EVENT_CONTEXT_VPID;
- } else if (!strcmp((char *) context_type,
- config_event_context_tid)) {
- ret = LTTNG_EVENT_CONTEXT_TID;
- } else if (!strcmp((char *) context_type,
- config_event_context_vtid)) {
- ret = LTTNG_EVENT_CONTEXT_VTID;
- } else if (!strcmp((char *) context_type,
- config_event_context_ppid)) {
- ret = LTTNG_EVENT_CONTEXT_PPID;
- } else if (!strcmp((char *) context_type,
- config_event_context_vppid)) {
- ret = LTTNG_EVENT_CONTEXT_VPPID;
- } else if (!strcmp((char *) context_type,
- config_event_context_pthread_id)) {
- ret = LTTNG_EVENT_CONTEXT_PTHREAD_ID;
- } else if (!strcmp((char *) context_type,
- config_event_context_hostname)) {
- ret = LTTNG_EVENT_CONTEXT_HOSTNAME;
- } else if (!strcmp((char *) context_type,
- config_event_context_ip)) {
- ret = LTTNG_EVENT_CONTEXT_IP;
- } else if (!strcmp((char *) context_type,
- config_event_context_interruptible)) {
- ret = LTTNG_EVENT_CONTEXT_INTERRUPTIBLE;
- } else if (!strcmp((char *) context_type,
- config_event_context_preemptible)) {
- ret = LTTNG_EVENT_CONTEXT_PREEMPTIBLE;
- } else if (!strcmp((char *) context_type,
- config_event_context_need_reschedule)) {
- ret = LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE;
- } else if (!strcmp((char *) context_type,
- config_event_context_migratable)) {
- ret = LTTNG_EVENT_CONTEXT_MIGRATABLE;
- } else if (!strcmp((char *) context_type,
- config_event_context_callstack_user)) {
- ret = LTTNG_EVENT_CONTEXT_CALLSTACK_USER;
- } else if (!strcmp((char *) context_type,
- config_event_context_callstack_kernel)) {
- ret = LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL;
- } else if (!strcmp((char *) context_type,
- config_event_context_cgroup_ns)) {
- ret = LTTNG_EVENT_CONTEXT_CGROUP_NS;
- } else if (!strcmp((char *) context_type,
- config_event_context_ipc_ns)) {
- ret = LTTNG_EVENT_CONTEXT_IPC_NS;
- } else if (!strcmp((char *) context_type,
- config_event_context_mnt_ns)) {
- ret = LTTNG_EVENT_CONTEXT_MNT_NS;
- } else if (!strcmp((char *) context_type,
- config_event_context_net_ns)) {
- ret = LTTNG_EVENT_CONTEXT_NET_NS;
- } else if (!strcmp((char *) context_type,
- config_event_context_pid_ns)) {
- ret = LTTNG_EVENT_CONTEXT_PID_NS;
- } else if (!strcmp((char *) context_type,
- config_event_context_time_ns)) {
- ret = LTTNG_EVENT_CONTEXT_TIME_NS;
- } else if (!strcmp((char *) context_type,
- config_event_context_user_ns)) {
- ret = LTTNG_EVENT_CONTEXT_USER_NS;
- } else if (!strcmp((char *) context_type,
- config_event_context_uts_ns)) {
- ret = LTTNG_EVENT_CONTEXT_UTS_NS;
- } else if (!strcmp((char *) context_type,
- config_event_context_uid)) {
- ret = LTTNG_EVENT_CONTEXT_UID;
- } else if (!strcmp((char *) context_type,
- config_event_context_euid)) {
- ret = LTTNG_EVENT_CONTEXT_EUID;
- } else if (!strcmp((char *) context_type,
- config_event_context_suid)) {
- ret = LTTNG_EVENT_CONTEXT_SUID;
- } else if (!strcmp((char *) context_type,
- config_event_context_gid)) {
- ret = LTTNG_EVENT_CONTEXT_GID;
- } else if (!strcmp((char *) context_type,
- config_event_context_egid)) {
- ret = LTTNG_EVENT_CONTEXT_EGID;
- } else if (!strcmp((char *) context_type,
- config_event_context_sgid)) {
- ret = LTTNG_EVENT_CONTEXT_SGID;
- } else if (!strcmp((char *) context_type,
- config_event_context_vuid)) {
- ret = LTTNG_EVENT_CONTEXT_VUID;
- } else if (!strcmp((char *) context_type,
- config_event_context_veuid)) {
- ret = LTTNG_EVENT_CONTEXT_VEUID;
- } else if (!strcmp((char *) context_type,
- config_event_context_vsuid)) {
- ret = LTTNG_EVENT_CONTEXT_VSUID;
- } else if (!strcmp((char *) context_type,
- config_event_context_vgid)) {
- ret = LTTNG_EVENT_CONTEXT_VGID;
- } else if (!strcmp((char *) context_type,
- config_event_context_vegid)) {
- ret = LTTNG_EVENT_CONTEXT_VEGID;
- } else if (!strcmp((char *) context_type,
- config_event_context_vsgid)) {
- ret = LTTNG_EVENT_CONTEXT_VSGID;
- } else {
- goto error;
- }
-
- return ret;
-error:
- return -1;
-}
-
-static
-int init_domain(xmlNodePtr domain_node, struct lttng_domain *domain)
-{
- int ret;
- xmlNodePtr node;
-
- for (node = xmlFirstElementChild(domain_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name, config_element_type)) {
- /* domain type */
- xmlChar *node_content = xmlNodeGetContent(node);
- if (!node_content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = get_domain_type(node_content);
- free(node_content);
- if (ret < 0) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- domain->type = ret;
- } else if (!strcmp((const char *) node->name,
- config_element_buffer_type)) {
- /* buffer type */
- xmlChar *node_content = xmlNodeGetContent(node);
- if (!node_content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = get_buffer_type(node_content);
- free(node_content);
- if (ret < 0) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- domain->buf_type = ret;
- }
- }
- ret = 0;
-end:
- return ret;
-}
-
-static
-int get_net_output_uris(xmlNodePtr net_output_node, char **control_uri,
- char **data_uri)
-{
- xmlNodePtr node;
-
- for (node = xmlFirstElementChild(net_output_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name, config_element_control_uri)) {
- /* control_uri */
- *control_uri = (char *) xmlNodeGetContent(node);
- if (!*control_uri) {
- break;
- }
- } else {
- /* data_uri */
- *data_uri = (char *) xmlNodeGetContent(node);
- if (!*data_uri) {
- break;
- }
- }
- }
-
- return *control_uri || *data_uri ? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG;
-}
-
-static
-int process_consumer_output(xmlNodePtr consumer_output_node,
- struct consumer_output *output)
-{
- int ret;
- xmlNodePtr node;
-
- LTTNG_ASSERT(output);
-
- for (node = xmlFirstElementChild(consumer_output_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name, config_element_enabled)) {
- xmlChar *enabled_str = xmlNodeGetContent(node);
-
- /* enabled */
- if (!enabled_str) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_bool(enabled_str, &output->enabled);
- free(enabled_str);
- if (ret) {
- goto end;
- }
- } else {
- xmlNodePtr output_type_node;
-
- /* destination */
- output_type_node = xmlFirstElementChild(node);
- if (!output_type_node) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- if (!strcmp((const char *) output_type_node->name,
- config_element_path)) {
- /* path */
- output->path = (char *) xmlNodeGetContent(output_type_node);
- if (!output->path) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
- } else {
- /* net_output */
- ret = get_net_output_uris(output_type_node,
- &output->control_uri, &output->data_uri);
- if (ret) {
- goto end;
- }
- }
- }
- }
- ret = 0;
-
-end:
- if (ret) {
- free(output->path);
- free(output->control_uri);
- free(output->data_uri);
- memset(output, 0, sizeof(struct consumer_output));
- }
- return ret;
-}
-
-static
-int create_session_net_output(const char *name, const char *control_uri,
- const char *data_uri)
-{
- int ret;
- struct lttng_handle *handle;
- const char *uri = NULL;
-
- LTTNG_ASSERT(name);
-
- handle = lttng_create_handle(name, NULL);
- if (!handle) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- if (!control_uri || !data_uri) {
- uri = control_uri ? control_uri : data_uri;
- control_uri = uri;
- data_uri = uri;
- }
-
- ret = lttng_set_consumer_url(handle, control_uri, data_uri);
- lttng_destroy_handle(handle);
-end:
- return ret;
-}
-
-static
-int create_snapshot_session(const char *session_name, xmlNodePtr output_node,
- const struct config_load_session_override_attr *overrides)
-{
- int ret;
- xmlNodePtr node = NULL;
- xmlNodePtr snapshot_output_list_node;
- xmlNodePtr snapshot_output_node;
-
- LTTNG_ASSERT(session_name);
-
- ret = lttng_create_session_snapshot(session_name, NULL);
- if (ret) {
- goto end;
- }
-
- if (!output_node) {
- goto end;
- }
-
- snapshot_output_list_node = xmlFirstElementChild(output_node);
-
- /* Parse and create snapshot outputs */
-
- for (snapshot_output_node =
- xmlFirstElementChild(snapshot_output_list_node);
- snapshot_output_node; snapshot_output_node =
- xmlNextElementSibling(snapshot_output_node)) {
- char *name = NULL;
- uint64_t max_size = UINT64_MAX;
- struct consumer_output output = { 0 };
- struct lttng_snapshot_output *snapshot_output = NULL;
- const char *control_uri = NULL;
- const char *data_uri = NULL;
- const char *path = NULL;
-
- for (node = xmlFirstElementChild(snapshot_output_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name,
- config_element_name)) {
- /* name */
- name = (char *) xmlNodeGetContent(node);
- if (!name) {
- ret = -LTTNG_ERR_NOMEM;
- goto error_snapshot_output;
- }
- } else if (!strcmp((const char *) node->name,
- config_element_max_size)) {
- xmlChar *content = xmlNodeGetContent(node);
-
- /* max_size */
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto error_snapshot_output;
- }
- ret = parse_uint(content, &max_size);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto error_snapshot_output;
- }
- } else {
- /* consumer_output */
- ret = process_consumer_output(node, &output);
- if (ret) {
- goto error_snapshot_output;
- }
- }
- }
-
- control_uri = output.control_uri;
- data_uri = output.data_uri;
- path = output.path;
-
- if (overrides) {
- if (overrides->path_url) {
- path = overrides->path_url;
- /* Control/data_uri are null */
- control_uri = NULL;
- data_uri = NULL;
- } else {
- if (overrides->ctrl_url) {
- control_uri = overrides->ctrl_url;
- /* path is null */
- path = NULL;
- }
- if (overrides->data_url) {
- data_uri = overrides->data_url;
- /* path is null */
- path = NULL;
- }
- }
- }
-
- snapshot_output = lttng_snapshot_output_create();
- if (!snapshot_output) {
- ret = -LTTNG_ERR_NOMEM;
- goto error_snapshot_output;
- }
-
- ret = lttng_snapshot_output_set_name(name, snapshot_output);
- if (ret) {
- goto error_snapshot_output;
- }
-
- ret = lttng_snapshot_output_set_size(max_size, snapshot_output);
- if (ret) {
- goto error_snapshot_output;
- }
-
- if (path) {
- ret = lttng_snapshot_output_set_ctrl_url(path,
- snapshot_output);
- if (ret) {
- goto error_snapshot_output;
- }
- } else {
- if (control_uri) {
- ret = lttng_snapshot_output_set_ctrl_url(control_uri,
- snapshot_output);
- if (ret) {
- goto error_snapshot_output;
- }
- }
-
- if (data_uri) {
- ret = lttng_snapshot_output_set_data_url(data_uri,
- snapshot_output);
- if (ret) {
- goto error_snapshot_output;
- }
- }
- }
-
- ret = lttng_snapshot_add_output(session_name, snapshot_output);
-error_snapshot_output:
- free(name);
- free(output.path);
- free(output.control_uri);
- free(output.data_uri);
- lttng_snapshot_output_destroy(snapshot_output);
- if (ret) {
- goto end;
- }
- }
-end:
- return ret;
-}
-
-static
-int create_session(const char *name,
- xmlNodePtr output_node,
- uint64_t live_timer_interval,
- const struct config_load_session_override_attr *overrides)
-{
- int ret;
- struct consumer_output output = { 0 };
- xmlNodePtr consumer_output_node;
- const char *control_uri = NULL;
- const char *data_uri = NULL;
- const char *path = NULL;
-
- LTTNG_ASSERT(name);
-
- if (output_node) {
- consumer_output_node = xmlFirstElementChild(output_node);
- if (!consumer_output_node) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- if (strcmp((const char *) consumer_output_node->name,
- config_element_consumer_output)) {
- WARN("Invalid output type, expected %s node",
- config_element_consumer_output);
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- ret = process_consumer_output(consumer_output_node, &output);
- if (ret) {
- goto end;
- }
- }
-
- control_uri = output.control_uri;
- data_uri = output.data_uri;
- path = output.path;
-
- /* Check for override and apply them */
- if (overrides) {
- if (overrides->path_url) {
- path = overrides->path_url;
- /* control/data_uri are null */;
- control_uri = NULL;
- data_uri = NULL;
- } else {
- if (overrides->ctrl_url) {
- control_uri = overrides->ctrl_url;
- /* path is null */
- path = NULL;
- }
- if (overrides->data_url) {
- data_uri = overrides->data_url;
- /* path is null */
- path = NULL;
- }
- }
- }
-
-
- if (live_timer_interval != UINT64_MAX && !control_uri && !data_uri) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- if (control_uri || data_uri) {
- /* network destination */
- if (live_timer_interval && live_timer_interval != UINT64_MAX) {
- /*
- * URLs are provided for sure since the test above make sure that
- * with a live timer the data and control URIs are provided. So,
- * NULL is passed here and will be set right after.
- */
- ret = lttng_create_session_live(name, NULL, live_timer_interval);
- } else {
- ret = lttng_create_session(name, NULL);
- }
- if (ret) {
- goto end;
- }
-
- ret = create_session_net_output(name, control_uri, data_uri);
- if (ret) {
- goto end;
- }
-
- } else {
- /* either local output or no output */
- ret = lttng_create_session(name, path);
- if (ret) {
- goto end;
- }
- }
-end:
- free(output.path);
- free(output.control_uri);
- free(output.data_uri);
- return ret;
-}
-
-static
-struct lttng_userspace_probe_location *
-process_userspace_probe_function_attribute_node(
- xmlNodePtr attribute_node)
-{
- xmlNodePtr function_attribute_node;
- char *function_name = NULL, *binary_path = NULL;
- struct lttng_userspace_probe_location *location = NULL;
- struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL;
-
- /*
- * Process userspace probe location function attributes. The order of
- * the fields are not guaranteed so we need to iterate over all fields
- * and check at the end if everything we need for this location type is
- * there.
- */
- for (function_attribute_node =
- xmlFirstElementChild(attribute_node);
- function_attribute_node;
- function_attribute_node = xmlNextElementSibling(
- function_attribute_node)) {
- /* Handle function name, binary path and lookup method. */
- if (!strcmp((const char *) function_attribute_node->name,
- config_element_userspace_probe_function_location_function_name)) {
- function_name = (char *) xmlNodeGetContent(function_attribute_node);
- if (!function_name) {
- goto error;
- }
- } else if (!strcmp((const char *) function_attribute_node->name,
- config_element_userspace_probe_location_binary_path)) {
- binary_path = (char *) xmlNodeGetContent(function_attribute_node);
- if (!binary_path) {
- goto error;
- }
- } else if (!strcmp((const char *) function_attribute_node->name,
- config_element_userspace_probe_lookup)) {
- char *lookup_method_name;
-
- lookup_method_name = (char *) xmlNodeGetContent(
- function_attribute_node);
- if (!lookup_method_name) {
- goto error;
- }
-
- /*
- * function_default lookup method defaults to
- * function_elf lookup method at the moment.
- */
- if (!strcmp(lookup_method_name, config_element_userspace_probe_lookup_function_elf)
- || !strcmp(lookup_method_name, config_element_userspace_probe_lookup_function_default)) {
- lookup_method = lttng_userspace_probe_location_lookup_method_function_elf_create();
- if (!lookup_method) {
- PERROR("Error creating function default/ELF lookup method");
- }
- } else {
- WARN("Unknown function lookup method");
- }
-
- free(lookup_method_name);
- if (!lookup_method) {
- goto error;
- }
- } else {
- goto error;
- }
-
- /* Check if all the necessary fields were found. */
- if (binary_path && function_name && lookup_method) {
- /* Ownership of lookup_method is transferred. */
- location =
- lttng_userspace_probe_location_function_create(
- binary_path, function_name,
- lookup_method);
- lookup_method = NULL;
- goto error;
- }
- }
-error:
- lttng_userspace_probe_location_lookup_method_destroy(lookup_method);
- free(binary_path);
- free(function_name);
- return location;
-}
-
-static
-struct lttng_userspace_probe_location *
-process_userspace_probe_tracepoint_attribute_node(
- xmlNodePtr attribute_node)
-{
- xmlNodePtr tracepoint_attribute_node;
- char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL;
- struct lttng_userspace_probe_location *location = NULL;
- struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL;
-
- /*
- * Process userspace probe location tracepoint attributes. The order of
- * the fields are not guaranteed so we need to iterate over all fields
- * and check at the end if everything we need for this location type is
- * there.
- */
- for (tracepoint_attribute_node =
- xmlFirstElementChild(attribute_node); tracepoint_attribute_node;
- tracepoint_attribute_node = xmlNextElementSibling(
- tracepoint_attribute_node)) {
- if (!strcmp((const char *) tracepoint_attribute_node->name,
- config_element_userspace_probe_tracepoint_location_probe_name)) {
- probe_name = (char *) xmlNodeGetContent(tracepoint_attribute_node);
- if (!probe_name) {
- goto error;
- }
- } else if (!strcmp((const char *) tracepoint_attribute_node->name,
- config_element_userspace_probe_tracepoint_location_provider_name)) {
- provider_name = (char *) xmlNodeGetContent(tracepoint_attribute_node);
- if (!provider_name) {
- goto error;
- }
- } else if (!strcmp((const char *) tracepoint_attribute_node->name,
- config_element_userspace_probe_location_binary_path)) {
- binary_path = (char *) xmlNodeGetContent(tracepoint_attribute_node);
- if (!binary_path) {
- goto error;
- }
- } else if (!strcmp((const char *) tracepoint_attribute_node->name,
- config_element_userspace_probe_lookup)) {
- char *lookup_method_name;
-
- lookup_method_name = (char *) xmlNodeGetContent(
- tracepoint_attribute_node);
- if (!lookup_method_name) {
- goto error;
- }
-
- if (!strcmp(lookup_method_name,
- config_element_userspace_probe_lookup_tracepoint_sdt)) {
- lookup_method =
- lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create();
- if (!lookup_method) {
- PERROR("Error creating tracepoint SDT lookup method");
- }
- } else {
- WARN("Unknown tracepoint lookup method");
- }
-
- free(lookup_method_name);
- if (!lookup_method) {
- goto error;
- }
- } else {
- WARN("Unknown tracepoint attribute");
- goto error;
- }
-
- /* Check if all the necessary fields were found. */
- if (binary_path && provider_name && probe_name && lookup_method) {
- /* Ownership of lookup_method is transferred. */
- location =
- lttng_userspace_probe_location_tracepoint_create(
- binary_path, provider_name,
- probe_name, lookup_method);
- lookup_method = NULL;
- goto error;
- }
- }
-error:
- lttng_userspace_probe_location_lookup_method_destroy(lookup_method);
- free(binary_path);
- free(provider_name);
- free(probe_name);
- return location;
-}
-
-static
-int process_probe_attribute_node(xmlNodePtr probe_attribute_node,
- struct lttng_event_probe_attr *attr)
-{
- int ret;
-
- LTTNG_ASSERT(probe_attribute_node);
- LTTNG_ASSERT(attr);
-
- if (!strcmp((const char *) probe_attribute_node->name,
- config_element_address)) {
- xmlChar *content;
- uint64_t addr = 0;
-
- /* addr */
- content = xmlNodeGetContent(probe_attribute_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &addr);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- attr->addr = addr;
- } else if (!strcmp((const char *) probe_attribute_node->name,
- config_element_offset)) {
- xmlChar *content;
- uint64_t offset = 0;
-
- /* offset */
- content = xmlNodeGetContent(probe_attribute_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &offset);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- attr->offset = offset;
- } else if (!strcmp((const char *) probe_attribute_node->name,
- config_element_symbol_name)) {
- xmlChar *content;
-
- /* symbol_name */
- content = xmlNodeGetContent(probe_attribute_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = lttng_strncpy(attr->symbol_name,
- (const char *) content,
- LTTNG_SYMBOL_NAME_LEN);
- if (ret == -1) {
- ERR("symbol name \"%s\"'s length (%zu) exceeds the maximal permitted length (%d) in session configuration",
- (const char *) content,
- strlen((const char *) content),
- LTTNG_SYMBOL_NAME_LEN);
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- free(content);
- goto end;
- }
- free(content);
- }
- ret = 0;
-end:
- return ret;
-}
-
-static
-int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle,
- const char *channel_name, const enum process_event_node_phase phase)
-{
- int ret = 0, i;
- xmlNodePtr node;
- struct lttng_event *event;
- char **exclusions = NULL;
- unsigned long exclusion_count = 0;
- char *filter_expression = NULL;
-
- LTTNG_ASSERT(event_node);
- LTTNG_ASSERT(handle);
- LTTNG_ASSERT(channel_name);
-
- event = lttng_event_create();
- if (!event) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- /* Initialize default log level which varies by domain */
- switch (handle->domain.type)
- {
- case LTTNG_DOMAIN_JUL:
- event->loglevel = LTTNG_LOGLEVEL_JUL_ALL;
- break;
- case LTTNG_DOMAIN_LOG4J:
- event->loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
- break;
- case LTTNG_DOMAIN_PYTHON:
- event->loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
- break;
- case LTTNG_DOMAIN_UST:
- case LTTNG_DOMAIN_KERNEL:
- event->loglevel = LTTNG_LOGLEVEL_DEBUG;
- break;
- default:
- abort();
- }
-
- for (node = xmlFirstElementChild(event_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name, config_element_name)) {
- xmlChar *content;
-
- /* name */
- content = xmlNodeGetContent(node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = lttng_strncpy(event->name,
- (const char *) content,
- LTTNG_SYMBOL_NAME_LEN);
- if (ret == -1) {
- WARN("Event \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration",
- (const char *) content,
- strlen((const char *) content),
- LTTNG_SYMBOL_NAME_LEN);
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- free(content);
- goto end;
- }
- free(content);
- } else if (!strcmp((const char *) node->name,
- config_element_enabled)) {
- xmlChar *content = xmlNodeGetContent(node);
-
- /* enabled */
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_bool(content, &event->enabled);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- } else if (!strcmp((const char *) node->name,
- config_element_type)) {
- xmlChar *content = xmlNodeGetContent(node);
-
- /* type */
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = get_event_type(content);
- free(content);
- if (ret < 0) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- event->type = ret;
- } else if (!strcmp((const char *) node->name,
- config_element_loglevel_type)) {
- xmlChar *content = xmlNodeGetContent(node);
-
- /* loglevel_type */
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = get_loglevel_type(content);
- free(content);
- if (ret < 0) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- event->loglevel_type = ret;
- } else if (!strcmp((const char *) node->name,
- config_element_loglevel)) {
- xmlChar *content;
- int64_t loglevel = 0;
-
- /* loglevel */
- content = xmlNodeGetContent(node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_int(content, &loglevel);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- if (loglevel > INT_MAX || loglevel < INT_MIN) {
- WARN("loglevel out of range.");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- event->loglevel = loglevel;
- } else if (!strcmp((const char *) node->name,
- config_element_filter)) {
- xmlChar *content =
- xmlNodeGetContent(node);
-
- /* filter */
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- free(filter_expression);
- filter_expression = strdup((char *) content);
- free(content);
- if (!filter_expression) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
- } else if (!strcmp((const char *) node->name,
- config_element_exclusions)) {
- xmlNodePtr exclusion_node;
- int exclusion_index = 0;
-
- /* exclusions */
- if (exclusions) {
- /*
- * Exclusions has already been initialized,
- * invalid file.
- */
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- exclusion_count = xmlChildElementCount(node);
- if (!exclusion_count) {
- continue;
- }
-
- exclusions = zmalloc(exclusion_count * sizeof(char *));
- if (!exclusions) {
- exclusion_count = 0;
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- for (exclusion_node = xmlFirstElementChild(node); exclusion_node;
- exclusion_node = xmlNextElementSibling(exclusion_node)) {
- xmlChar *content =
- xmlNodeGetContent(exclusion_node);
-
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- exclusions[exclusion_index] = strdup((const char *) content);
- free(content);
- if (!exclusions[exclusion_index]) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
- exclusion_index++;
- }
-
- event->exclusion = 1;
- } else if (!strcmp((const char *) node->name,
- config_element_attributes)) {
- xmlNodePtr attribute_node = xmlFirstElementChild(node);
-
- /* attributes */
- if (!attribute_node) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- if (!strcmp((const char *) attribute_node->name,
- config_element_probe_attributes)) {
- xmlNodePtr probe_attribute_node;
-
- /* probe_attributes */
- for (probe_attribute_node =
- xmlFirstElementChild(attribute_node); probe_attribute_node;
- probe_attribute_node = xmlNextElementSibling(
- probe_attribute_node)) {
-
- ret = process_probe_attribute_node(probe_attribute_node,
- &event->attr.probe);
- if (ret) {
- goto end;
- }
- }
- } else if (!strcmp((const char *) attribute_node->name,
- config_element_function_attributes)) {
- size_t sym_len;
- xmlChar *content;
- xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node);
-
- /* function_attributes */
- content = xmlNodeGetContent(symbol_node);
- if (!content) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- sym_len = strlen((char *) content);
- if (sym_len >= LTTNG_SYMBOL_NAME_LEN) {
- WARN("Function name too long.");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- free(content);
- goto end;
- }
-
- ret = lttng_strncpy(
- event->attr.ftrace.symbol_name,
- (char *) content, sym_len);
- if (ret == -1) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- free(content);
- goto end;
- }
- free(content);
- } else if (!strcmp((const char *) attribute_node->name,
- config_element_userspace_probe_tracepoint_attributes)) {
- struct lttng_userspace_probe_location *location;
-
- location = process_userspace_probe_tracepoint_attribute_node(attribute_node);
- if (!location) {
- WARN("Error processing userspace probe tracepoint attribute");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- ret = lttng_event_set_userspace_probe_location(
- event, location);
- if (ret) {
- WARN("Error setting userspace probe location field");
- lttng_userspace_probe_location_destroy(
- location);
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- } else if (!strcmp((const char *) attribute_node->name,
- config_element_userspace_probe_function_attributes)) {
- struct lttng_userspace_probe_location *location;
-
- location =
- process_userspace_probe_function_attribute_node(
- attribute_node);
- if (!location) {
- WARN("Error processing userspace probe function attribute");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- ret = lttng_event_set_userspace_probe_location(
- event, location);
- if (ret) {
- WARN("Error setting userspace probe location field");
- lttng_userspace_probe_location_destroy(
- location);
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- } else {
- /* Unknown event attribute. */
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- }
- }
-
- if ((event->enabled && phase == ENABLE) || phase == CREATION) {
- ret = lttng_enable_event_with_exclusions(handle, event, channel_name,
- filter_expression, exclusion_count, exclusions);
- if (ret < 0) {
- WARN("Enabling event (name:%s) on load failed.", event->name);
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- }
- ret = 0;
-end:
- for (i = 0; i < exclusion_count; i++) {
- free(exclusions[i]);
- }
-
- lttng_event_destroy(event);
- free(exclusions);
- free(filter_expression);
- return ret;
-}
-
-static
-int process_events_node(xmlNodePtr events_node, struct lttng_handle *handle,
- const char *channel_name)
-{
- int ret = 0;
- struct lttng_event event;
- xmlNodePtr node;
-
- LTTNG_ASSERT(events_node);
- LTTNG_ASSERT(handle);
- LTTNG_ASSERT(channel_name);
-
- for (node = xmlFirstElementChild(events_node); node;
- node = xmlNextElementSibling(node)) {
- ret = process_event_node(node, handle, channel_name, CREATION);
- if (ret) {
- goto end;
- }
- }
-
- /*
- * Disable all events to enable only the necessary events.
- * Limitations regarding lttng_disable_events and tuple descriptor
- * force this approach.
- */
- memset(&event, 0, sizeof(event));
- event.loglevel = -1;
- event.type = LTTNG_EVENT_ALL;
- ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
- if (ret) {
- goto end;
- }
-
- for (node = xmlFirstElementChild(events_node); node;
- node = xmlNextElementSibling(node)) {
- ret = process_event_node(node, handle, channel_name, ENABLE);
- if (ret) {
- goto end;
- }
- }
-
-end:
- return ret;
-}
-
-static
-int process_channel_attr_node(xmlNodePtr attr_node,
- struct lttng_channel *channel, xmlNodePtr *contexts_node,
- xmlNodePtr *events_node)
-{
- int ret;
-
- LTTNG_ASSERT(attr_node);
- LTTNG_ASSERT(channel);
- LTTNG_ASSERT(contexts_node);
- LTTNG_ASSERT(events_node);
-
- if (!strcmp((const char *) attr_node->name, config_element_name)) {
- xmlChar *content;
-
- /* name */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = lttng_strncpy(channel->name,
- (const char *) content,
- LTTNG_SYMBOL_NAME_LEN);
- if (ret == -1) {
- WARN("Channel \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration",
- (const char *) content,
- strlen((const char *) content),
- LTTNG_SYMBOL_NAME_LEN);
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- free(content);
- goto end;
- }
- free(content);
- } else if (!strcmp((const char *) attr_node->name,
- config_element_enabled)) {
- xmlChar *content;
- int enabled;
-
- /* enabled */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_bool(content, &enabled);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- channel->enabled = enabled;
- } else if (!strcmp((const char *) attr_node->name,
- config_element_overwrite_mode)) {
- xmlChar *content;
-
- /* overwrite_mode */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = get_overwrite_mode(content);
- free(content);
- if (ret < 0) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- channel->attr.overwrite = ret;
- } else if (!strcmp((const char *) attr_node->name,
- config_element_subbuf_size)) {
- xmlChar *content;
-
- /* subbuffer_size */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &channel->attr.subbuf_size);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- } else if (!strcmp((const char *) attr_node->name,
- config_element_num_subbuf)) {
- xmlChar *content;
-
- /* subbuffer_count */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &channel->attr.num_subbuf);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- } else if (!strcmp((const char *) attr_node->name,
- config_element_switch_timer_interval)) {
- xmlChar *content;
- uint64_t switch_timer_interval = 0;
-
- /* switch_timer_interval */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &switch_timer_interval);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- if (switch_timer_interval > UINT_MAX) {
- WARN("switch_timer_interval out of range.");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- channel->attr.switch_timer_interval =
- switch_timer_interval;
- } else if (!strcmp((const char *) attr_node->name,
- config_element_read_timer_interval)) {
- xmlChar *content;
- uint64_t read_timer_interval = 0;
-
- /* read_timer_interval */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &read_timer_interval);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- if (read_timer_interval > UINT_MAX) {
- WARN("read_timer_interval out of range.");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- channel->attr.read_timer_interval =
- read_timer_interval;
- } else if (!strcmp((const char *) attr_node->name,
- config_element_output_type)) {
- xmlChar *content;
-
- /* output_type */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = get_output_type(content);
- free(content);
- if (ret < 0) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- channel->attr.output = ret;
- } else if (!strcmp((const char *) attr_node->name,
- config_element_tracefile_size)) {
- xmlChar *content;
-
- /* tracefile_size */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &channel->attr.tracefile_size);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- } else if (!strcmp((const char *) attr_node->name,
- config_element_tracefile_count)) {
- xmlChar *content;
-
- /* tracefile_count */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &channel->attr.tracefile_count);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- } else if (!strcmp((const char *) attr_node->name,
- config_element_live_timer_interval)) {
- xmlChar *content;
- uint64_t live_timer_interval = 0;
-
- /* live_timer_interval */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &live_timer_interval);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- if (live_timer_interval > UINT_MAX) {
- WARN("live_timer_interval out of range.");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- channel->attr.live_timer_interval =
- live_timer_interval;
- } else if (!strcmp((const char *) attr_node->name,
- config_element_monitor_timer_interval)) {
- xmlChar *content;
- uint64_t monitor_timer_interval = 0;
-
- /* monitor_timer_interval */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &monitor_timer_interval);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- ret = lttng_channel_set_monitor_timer_interval(channel,
- monitor_timer_interval);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- } else if (!strcmp((const char *) attr_node->name,
- config_element_blocking_timeout)) {
- xmlChar *content;
- int64_t blocking_timeout = 0;
-
- /* blocking_timeout */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_int(content, &blocking_timeout);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- ret = lttng_channel_set_blocking_timeout(channel,
- blocking_timeout);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- } else if (!strcmp((const char *) attr_node->name,
- config_element_events)) {
- /* events */
- *events_node = attr_node;
- } else {
- /* contexts */
- *contexts_node = attr_node;
- }
- ret = 0;
-end:
- return ret;
-}
-
-static
-int process_context_node(xmlNodePtr context_node,
- struct lttng_handle *handle, const char *channel_name)
-{
- int ret;
- struct lttng_event_context context;
- xmlNodePtr context_child_node = xmlFirstElementChild(context_node);
-
- LTTNG_ASSERT(handle);
- LTTNG_ASSERT(channel_name);
-
- if (!context_child_node) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- memset(&context, 0, sizeof(context));
-
- if (!strcmp((const char *) context_child_node->name,
- config_element_type)) {
- /* type */
- xmlChar *content = xmlNodeGetContent(context_child_node);
-
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = get_context_type(content);
- free(content);
- if (ret < 0) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- context.ctx = ret;
- } else if (!strcmp((const char *) context_child_node->name,
- config_element_context_perf)) {
- /* perf */
- xmlNodePtr perf_attr_node;
-
- context.ctx = handle->domain.type == LTTNG_DOMAIN_KERNEL ?
- LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER :
- LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER;
- for (perf_attr_node = xmlFirstElementChild(context_child_node);
- perf_attr_node; perf_attr_node =
- xmlNextElementSibling(perf_attr_node)) {
- if (!strcmp((const char *) perf_attr_node->name,
- config_element_type)) {
- xmlChar *content;
- uint64_t type = 0;
-
- /* type */
- content = xmlNodeGetContent(perf_attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &type);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- if (type > UINT32_MAX) {
- WARN("perf context type out of range.");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- context.u.perf_counter.type = type;
- } else if (!strcmp((const char *) perf_attr_node->name,
- config_element_config)) {
- xmlChar *content;
- uint64_t config = 0;
-
- /* config */
- content = xmlNodeGetContent(perf_attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = parse_uint(content, &config);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- context.u.perf_counter.config = config;
- } else if (!strcmp((const char *) perf_attr_node->name,
- config_element_name)) {
- xmlChar *content;
-
- /* name */
- content = xmlNodeGetContent(perf_attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = lttng_strncpy(context.u.perf_counter.name,
- (const char *) content,
- LTTNG_SYMBOL_NAME_LEN);
- if (ret == -1) {
- WARN("Perf counter \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration",
- (const char *) content,
- strlen((const char *) content),
- LTTNG_SYMBOL_NAME_LEN);
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- free(content);
- goto end;
- }
- free(content);
- }
- }
- } else if (!strcmp((const char *) context_child_node->name,
- config_element_context_app)) {
- /* application context */
- xmlNodePtr app_ctx_node;
-
- context.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT;
- for (app_ctx_node = xmlFirstElementChild(context_child_node);
- app_ctx_node; app_ctx_node =
- xmlNextElementSibling(app_ctx_node)) {
- xmlChar *content;
- char **target = strcmp(
- (const char *) app_ctx_node->name,
- config_element_context_app_provider_name) == 0 ?
- &context.u.app_ctx.provider_name :
- &context.u.app_ctx.ctx_name;
-
- content = xmlNodeGetContent(app_ctx_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- *target = (char *) content;
- }
- } else {
- /* Unrecognized context type */
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- ret = lttng_add_context(handle, &context, NULL, channel_name);
- if (context.ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
- free(context.u.app_ctx.provider_name);
- free(context.u.app_ctx.ctx_name);
- }
-end:
- return ret;
-}
-
-static
-int process_contexts_node(xmlNodePtr contexts_node,
- struct lttng_handle *handle, const char *channel_name)
-{
- int ret = 0;
- xmlNodePtr context_node;
-
- for (context_node = xmlFirstElementChild(contexts_node); context_node;
- context_node = xmlNextElementSibling(context_node)) {
- ret = process_context_node(context_node, handle, channel_name);
- if (ret) {
- goto end;
- }
- }
-end:
- return ret;
-}
-
-static int get_tracker_elements(enum lttng_process_attr process_attr,
- const char **element_id_tracker,
- const char **element_value_type,
- const char **element_value,
- const char **element_value_alias,
- const char **element_name)
-{
- int ret = 0;
-
- switch (process_attr) {
- case LTTNG_PROCESS_ATTR_PROCESS_ID:
- *element_id_tracker = config_element_process_attr_tracker_pid;
- *element_value_type = config_element_process_attr_pid_value;
- *element_value = config_element_process_attr_id;
- *element_value_alias = config_element_process_attr_id;
- *element_name = NULL;
- break;
- case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
- *element_id_tracker = config_element_process_attr_tracker_vpid;
- *element_value_type = config_element_process_attr_vpid_value;
- *element_value = config_element_process_attr_id;
- *element_value_alias = NULL;
- *element_name = NULL;
- break;
- case LTTNG_PROCESS_ATTR_USER_ID:
- *element_id_tracker = config_element_process_attr_tracker_uid;
- *element_value_type = config_element_process_attr_uid_value;
- *element_value = config_element_process_attr_id;
- *element_value_alias = NULL;
- *element_name = config_element_name;
- break;
- case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
- *element_id_tracker = config_element_process_attr_tracker_vuid;
- *element_value_type = config_element_process_attr_vuid_value;
- *element_value = config_element_process_attr_id;
- *element_value_alias = NULL;
- *element_name = config_element_name;
- break;
- case LTTNG_PROCESS_ATTR_GROUP_ID:
- *element_id_tracker = config_element_process_attr_tracker_gid;
- *element_value_type = config_element_process_attr_gid_value;
- *element_value = config_element_process_attr_id;
- *element_value_alias = NULL;
- *element_name = config_element_name;
- break;
- case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
- *element_id_tracker = config_element_process_attr_tracker_vgid;
- *element_value_type = config_element_process_attr_vgid_value;
- *element_value = config_element_process_attr_id;
- *element_value_alias = NULL;
- *element_name = config_element_name;
- break;
- default:
- ret = LTTNG_ERR_INVALID;
- }
- return ret;
-}
-
-static int process_legacy_pid_tracker_node(
- xmlNodePtr trackers_node, struct lttng_handle *handle)
-{
- int ret = 0, child_count;
- xmlNodePtr targets_node = NULL;
- xmlNodePtr node;
- const char *element_id_tracker;
- const char *element_target_id;
- const char *element_id;
- const char *element_id_alias;
- const char *element_name;
- enum lttng_error_code tracker_handle_ret_code;
- struct lttng_process_attr_tracker_handle *tracker_handle = NULL;
- enum lttng_process_attr_tracker_handle_status status;
- const enum lttng_process_attr process_attr =
- handle->domain.type == LTTNG_DOMAIN_UST ?
- LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID :
- LTTNG_PROCESS_ATTR_PROCESS_ID;
-
- LTTNG_ASSERT(handle);
-
- tracker_handle_ret_code = lttng_session_get_tracker_handle(
- handle->session_name, handle->domain.type,
- process_attr,
- &tracker_handle);
- if (tracker_handle_ret_code != LTTNG_OK) {
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- ret = get_tracker_elements(process_attr, &element_id_tracker,
- &element_target_id, &element_id, &element_id_alias,
- &element_name);
- if (ret) {
- goto end;
- }
-
- /* Get the targets node */
- for (node = xmlFirstElementChild(trackers_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name,
- config_element_tracker_targets_legacy)) {
- targets_node = node;
- break;
- }
- }
-
- if (!targets_node) {
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- /* Go through all id target node */
- child_count = xmlChildElementCount(targets_node);
- status = lttng_process_attr_tracker_handle_set_tracking_policy(
- tracker_handle,
- child_count == 0 ? LTTNG_TRACKING_POLICY_EXCLUDE_ALL :
- LTTNG_TRACKING_POLICY_INCLUDE_SET);
- if (status != LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK) {
- ret = LTTNG_ERR_UNK;
- goto end;
- }
-
- /* Add all tracked values. */
- for (node = xmlFirstElementChild(targets_node); node;
- node = xmlNextElementSibling(node)) {
- xmlNodePtr pid_target_node = node;
-
- /* get pid_target node and track it */
- for (node = xmlFirstElementChild(pid_target_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name,
- config_element_tracker_pid_legacy)) {
- int64_t id;
- xmlChar *content = xmlNodeGetContent(node);
-
- if (!content) {
- ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- ret = parse_int(content, &id);
- free(content);
- if (ret) {
- ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- switch (process_attr) {
- case LTTNG_PROCESS_ATTR_PROCESS_ID:
- status = lttng_process_attr_process_id_tracker_handle_add_pid(
- tracker_handle,
- (pid_t) id);
- break;
- case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
- status = lttng_process_attr_virtual_process_id_tracker_handle_add_pid(
- tracker_handle,
- (pid_t) id);
- break;
- default:
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
- }
- switch (status) {
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK:
- continue;
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_INVALID:
- ret = LTTNG_ERR_INVALID;
- break;
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_EXISTS:
- ret = LTTNG_ERR_PROCESS_ATTR_EXISTS;
- break;
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_MISSING:
- ret = LTTNG_ERR_PROCESS_ATTR_MISSING;
- break;
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_ERROR:
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_COMMUNICATION_ERROR:
- default:
- ret = LTTNG_ERR_UNK;
- goto end;
- }
- }
- node = pid_target_node;
- }
-
-end:
- lttng_process_attr_tracker_handle_destroy(tracker_handle);
- return ret;
- }
-
-static int process_id_tracker_node(xmlNodePtr id_tracker_node,
- struct lttng_handle *handle,
- enum lttng_process_attr process_attr)
-{
- int ret = 0, child_count;
- xmlNodePtr values_node = NULL;
- xmlNodePtr node;
- const char *element_id_tracker;
- const char *element_target_id;
- const char *element_id;
- const char *element_id_alias;
- const char *element_name;
- enum lttng_error_code tracker_handle_ret_code;
- struct lttng_process_attr_tracker_handle *tracker_handle = NULL;
- enum lttng_process_attr_tracker_handle_status status;
-
- LTTNG_ASSERT(handle);
- LTTNG_ASSERT(id_tracker_node);
-
- tracker_handle_ret_code = lttng_session_get_tracker_handle(
- handle->session_name, handle->domain.type, process_attr,
- &tracker_handle);
- if (tracker_handle_ret_code != LTTNG_OK) {
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- ret = get_tracker_elements(process_attr, &element_id_tracker,
- &element_target_id, &element_id, &element_id_alias,
- &element_name);
- if (ret) {
- goto end;
- }
-
- /* get the values node */
- for (node = xmlFirstElementChild(id_tracker_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name,
- config_element_process_attr_values)) {
- values_node = node;
- break;
- }
- }
-
- if (!values_node) {
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- /* Go through all id target node */
- child_count = xmlChildElementCount(values_node);
- status = lttng_process_attr_tracker_handle_set_tracking_policy(
- tracker_handle,
- child_count == 0 ? LTTNG_TRACKING_POLICY_EXCLUDE_ALL :
- LTTNG_TRACKING_POLICY_INCLUDE_SET);
- if (status != LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK) {
- ret = LTTNG_ERR_UNK;
- goto end;
- }
-
- /* Add all tracked values. */
- for (node = xmlFirstElementChild(values_node); node;
- node = xmlNextElementSibling(node)) {
- xmlNodePtr id_target_node = node;
-
- /* get id node and track it */
- for (node = xmlFirstElementChild(id_target_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name, element_id) ||
- (element_id_alias &&
- !strcmp((const char *) node->name,
- element_id_alias))) {
- int64_t id;
- xmlChar *content = xmlNodeGetContent(node);
-
- if (!content) {
- ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- ret = parse_int(content, &id);
- free(content);
- if (ret) {
- ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- switch (process_attr) {
- case LTTNG_PROCESS_ATTR_PROCESS_ID:
- status = lttng_process_attr_process_id_tracker_handle_add_pid(
- tracker_handle,
- (pid_t) id);
- break;
- case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
- status = lttng_process_attr_virtual_process_id_tracker_handle_add_pid(
- tracker_handle,
- (pid_t) id);
- break;
- case LTTNG_PROCESS_ATTR_USER_ID:
- status = lttng_process_attr_user_id_tracker_handle_add_uid(
- tracker_handle,
- (uid_t) id);
- break;
- case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
- status = lttng_process_attr_virtual_user_id_tracker_handle_add_uid(
- tracker_handle,
- (uid_t) id);
- break;
- case LTTNG_PROCESS_ATTR_GROUP_ID:
- status = lttng_process_attr_group_id_tracker_handle_add_gid(
- tracker_handle,
- (gid_t) id);
- break;
- case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
- status = lttng_process_attr_virtual_group_id_tracker_handle_add_gid(
- tracker_handle,
- (gid_t) id);
- break;
- default:
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
- } else if (element_name &&
- !strcmp((const char *) node->name,
- element_name)) {
- xmlChar *content = xmlNodeGetContent(node);
-
- if (!content) {
- ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- switch (process_attr) {
- case LTTNG_PROCESS_ATTR_USER_ID:
- status = lttng_process_attr_user_id_tracker_handle_add_user_name(
- tracker_handle,
- (const char *) content);
- break;
- case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
- status = lttng_process_attr_virtual_user_id_tracker_handle_add_user_name(
- tracker_handle,
- (const char *) content);
- break;
- case LTTNG_PROCESS_ATTR_GROUP_ID:
- status = lttng_process_attr_group_id_tracker_handle_add_group_name(
- tracker_handle,
- (const char *) content);
- break;
- case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
- status = lttng_process_attr_virtual_group_id_tracker_handle_add_group_name(
- tracker_handle,
- (const char *) content);
- break;
- default:
- free(content);
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
- free(content);
- }
- switch (status) {
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK:
- continue;
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_INVALID:
- ret = LTTNG_ERR_INVALID;
- break;
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_EXISTS:
- ret = LTTNG_ERR_PROCESS_ATTR_EXISTS;
- break;
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_MISSING:
- ret = LTTNG_ERR_PROCESS_ATTR_MISSING;
- break;
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_ERROR:
- case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_COMMUNICATION_ERROR:
- default:
- ret = LTTNG_ERR_UNK;
- goto end;
- }
- }
- node = id_target_node;
- }
-
-end:
- lttng_process_attr_tracker_handle_destroy(tracker_handle);
- return ret;
-}
-
-static
-int process_domain_node(xmlNodePtr domain_node, const char *session_name)
-{
- int ret;
- struct lttng_domain domain = { 0 };
- struct lttng_handle *handle = NULL;
- struct lttng_channel *channel = NULL;
- xmlNodePtr channels_node = NULL;
- xmlNodePtr trackers_node = NULL;
- xmlNodePtr pid_tracker_node = NULL;
- xmlNodePtr vpid_tracker_node = NULL;
- xmlNodePtr uid_tracker_node = NULL;
- xmlNodePtr vuid_tracker_node = NULL;
- xmlNodePtr gid_tracker_node = NULL;
- xmlNodePtr vgid_tracker_node = NULL;
- xmlNodePtr node;
-
- LTTNG_ASSERT(session_name);
-
- ret = init_domain(domain_node, &domain);
- if (ret) {
- goto end;
- }
-
- handle = lttng_create_handle(session_name, &domain);
- if (!handle) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- /* get the channels node */
- for (node = xmlFirstElementChild(domain_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name,
- config_element_channels)) {
- channels_node = node;
- break;
- }
- }
-
- if (!channels_node) {
- goto end;
- }
-
- /* create all channels */
- for (node = xmlFirstElementChild(channels_node); node;
- node = xmlNextElementSibling(node)) {
- const enum lttng_domain_type original_domain = domain.type;
- xmlNodePtr contexts_node = NULL;
- xmlNodePtr events_node = NULL;
- xmlNodePtr channel_attr_node;
-
- /*
- * Channels of the "agent" types cannot be created directly.
- * They are meant to be created implicitly through the
- * activation of events in their domain. However, a user
- * can override the default channel configuration attributes
- * by creating the underlying UST channel _before_ enabling
- * an agent domain event.
- *
- * Hence, the channel's type is substituted before the creation
- * and restored by the time the events are created.
- */
- switch (domain.type) {
- case LTTNG_DOMAIN_JUL:
- case LTTNG_DOMAIN_LOG4J:
- case LTTNG_DOMAIN_PYTHON:
- domain.type = LTTNG_DOMAIN_UST;
- default:
- break;
- }
-
- channel = lttng_channel_create(&domain);
- if (!channel) {
- ret = -1;
- goto end;
- }
-
- for (channel_attr_node = xmlFirstElementChild(node);
- channel_attr_node; channel_attr_node =
- xmlNextElementSibling(channel_attr_node)) {
- ret = process_channel_attr_node(channel_attr_node,
- channel, &contexts_node, &events_node);
- if (ret) {
- goto end;
- }
- }
-
- ret = lttng_enable_channel(handle, channel);
- if (ret < 0) {
- goto end;
- }
-
- /* Restore the original channel domain. */
- domain.type = original_domain;
-
- ret = process_events_node(events_node, handle, channel->name);
- if (ret) {
- goto end;
- }
-
- ret = process_contexts_node(contexts_node, handle,
- channel->name);
- if (ret) {
- goto end;
- }
-
- lttng_channel_destroy(channel);
- }
- channel = NULL;
-
- /* get the trackers node */
- for (node = xmlFirstElementChild(domain_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name,
- config_element_process_attr_trackers) ||
- !strcmp((const char *) node->name,
- config_element_trackers_legacy)) {
- if (trackers_node) {
- ERR("Only one instance of `%s` or `%s` is allowed in a session configuration",
- config_element_process_attr_trackers,
- config_element_trackers_legacy);
- ret = -1;
- goto end;
- }
- trackers_node = node;
- break;
- }
- }
-
- if (!trackers_node) {
- goto end;
- }
-
- for (node = xmlFirstElementChild(trackers_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name,
- config_element_process_attr_tracker_pid)) {
- pid_tracker_node = node;
- ret = process_id_tracker_node(pid_tracker_node, handle,
- LTTNG_PROCESS_ATTR_PROCESS_ID);
- if (ret) {
- goto end;
- }
- }
- if (!strcmp((const char *) node->name,
- config_element_process_attr_tracker_vpid)) {
- vpid_tracker_node = node;
- ret = process_id_tracker_node(vpid_tracker_node, handle,
- LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID);
- if (ret) {
- goto end;
- }
- }
- if (!strcmp((const char *) node->name,
- config_element_process_attr_tracker_uid)) {
- uid_tracker_node = node;
- ret = process_id_tracker_node(uid_tracker_node, handle,
- LTTNG_PROCESS_ATTR_USER_ID);
- if (ret) {
- goto end;
- }
- }
- if (!strcmp((const char *) node->name,
- config_element_process_attr_tracker_vuid)) {
- vuid_tracker_node = node;
- ret = process_id_tracker_node(vuid_tracker_node, handle,
- LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID);
- if (ret) {
- goto end;
- }
- }
- if (!strcmp((const char *) node->name,
- config_element_process_attr_tracker_gid)) {
- gid_tracker_node = node;
- ret = process_id_tracker_node(gid_tracker_node, handle,
- LTTNG_PROCESS_ATTR_GROUP_ID);
- if (ret) {
- goto end;
- }
- }
- if (!strcmp((const char *) node->name,
- config_element_process_attr_tracker_vgid)) {
- vgid_tracker_node = node;
- ret = process_id_tracker_node(vgid_tracker_node, handle,
- LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID);
- if (ret) {
- goto end;
- }
- }
- if (!strcmp((const char *) node->name,
- config_element_pid_tracker_legacy)) {
- ret = process_legacy_pid_tracker_node(node, handle);
- if (ret) {
- goto end;
- }
- }
- }
-
-end:
- lttng_channel_destroy(channel);
- lttng_destroy_handle(handle);
- return ret;
-}
-
-static
-int add_periodic_rotation(const char *name, uint64_t time_us)
-{
- int ret;
- enum lttng_rotation_status status;
- struct lttng_rotation_schedule *periodic =
- lttng_rotation_schedule_periodic_create();
-
- if (!periodic) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
-
- status = lttng_rotation_schedule_periodic_set_period(periodic,
- time_us);
- if (status != LTTNG_ROTATION_STATUS_OK) {
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
-
- status = lttng_session_add_rotation_schedule(name, periodic);
- switch (status) {
- case LTTNG_ROTATION_STATUS_OK:
- ret = 0;
- break;
- case LTTNG_ROTATION_STATUS_SCHEDULE_ALREADY_SET:
- case LTTNG_ROTATION_STATUS_INVALID:
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- break;
- default:
- ret = -LTTNG_ERR_UNK;
- break;
- }
-error:
- lttng_rotation_schedule_destroy(periodic);
- return ret;
-}
-
-static
-int add_size_rotation(const char *name, uint64_t size_bytes)
-{
- int ret;
- enum lttng_rotation_status status;
- struct lttng_rotation_schedule *size =
- lttng_rotation_schedule_size_threshold_create();
-
- if (!size) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
-
- status = lttng_rotation_schedule_size_threshold_set_threshold(size,
- size_bytes);
- if (status != LTTNG_ROTATION_STATUS_OK) {
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
-
- status = lttng_session_add_rotation_schedule(name, size);
- switch (status) {
- case LTTNG_ROTATION_STATUS_OK:
- ret = 0;
- break;
- case LTTNG_ROTATION_STATUS_SCHEDULE_ALREADY_SET:
- case LTTNG_ROTATION_STATUS_INVALID:
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- break;
- default:
- ret = -LTTNG_ERR_UNK;
- break;
- }
-error:
- lttng_rotation_schedule_destroy(size);
- return ret;
-}
-
-static
-int process_session_rotation_schedules_node(
- xmlNodePtr schedules_node,
- uint64_t *rotation_timer_interval,
- uint64_t *rotation_size)
-{
- int ret = 0;
- xmlNodePtr child;
-
- for (child = xmlFirstElementChild(schedules_node);
- child;
- child = xmlNextElementSibling(child)) {
- if (!strcmp((const char *) child->name,
- config_element_rotation_schedule_periodic)) {
- xmlChar *content;
- xmlNodePtr time_us_node;
-
- /* periodic rotation schedule */
- time_us_node = xmlFirstElementChild(child);
- if (!time_us_node ||
- strcmp((const char *) time_us_node->name,
- config_element_rotation_schedule_periodic_time_us)) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- /* time_us child */
- content = xmlNodeGetContent(time_us_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
- ret = parse_uint(content, rotation_timer_interval);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- } else if (!strcmp((const char *) child->name,
- config_element_rotation_schedule_size_threshold)) {
- xmlChar *content;
- xmlNodePtr bytes_node;
-
- /* size_threshold rotation schedule */
- bytes_node = xmlFirstElementChild(child);
- if (!bytes_node ||
- strcmp((const char *) bytes_node->name,
- config_element_rotation_schedule_size_threshold_bytes)) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- /* bytes child */
- content = xmlNodeGetContent(bytes_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
- ret = parse_uint(content, rotation_size);
- free(content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
- }
- }
-
-end:
- return ret;
-}
-
-static
-int process_session_node(xmlNodePtr session_node, const char *session_name,
- int overwrite,
- const struct config_load_session_override_attr *overrides)
-{
- int ret, started = -1, snapshot_mode = -1;
- uint64_t live_timer_interval = UINT64_MAX,
- rotation_timer_interval = 0,
- rotation_size = 0;
- xmlChar *name = NULL;
- xmlChar *shm_path = NULL;
- xmlNodePtr domains_node = NULL;
- xmlNodePtr output_node = NULL;
- xmlNodePtr node;
- xmlNodePtr attributes_child;
- struct lttng_domain *kernel_domain = NULL;
- struct lttng_domain *ust_domain = NULL;
- struct lttng_domain *jul_domain = NULL;
- struct lttng_domain *log4j_domain = NULL;
- struct lttng_domain *python_domain = NULL;
-
- for (node = xmlFirstElementChild(session_node); node;
- node = xmlNextElementSibling(node)) {
- if (!name && !strcmp((const char *) node->name,
- config_element_name)) {
- /* name */
- xmlChar *node_content = xmlNodeGetContent(node);
- if (!node_content) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
-
- name = node_content;
- } else if (!domains_node && !strcmp((const char *) node->name,
- config_element_domains)) {
- /* domains */
- domains_node = node;
- } else if (started == -1 && !strcmp((const char *) node->name,
- config_element_started)) {
- /* started */
- xmlChar *node_content = xmlNodeGetContent(node);
- if (!node_content) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
-
- ret = parse_bool(node_content, &started);
- free(node_content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto error;
- }
- } else if (!output_node && !strcmp((const char *) node->name,
- config_element_output)) {
- /* output */
- output_node = node;
- } else if (!shm_path && !strcmp((const char *) node->name,
- config_element_shared_memory_path)) {
- /* shared memory path */
- xmlChar *node_content = xmlNodeGetContent(node);
- if (!node_content) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
-
- shm_path = node_content;
- } else {
- /*
- * attributes, snapshot_mode, live_timer_interval, rotation_size,
- * rotation_timer_interval.
- */
- for (attributes_child = xmlFirstElementChild(node); attributes_child;
- attributes_child = xmlNextElementSibling(attributes_child)) {
- if (!strcmp((const char *) attributes_child->name,
- config_element_snapshot_mode)) {
- /* snapshot_mode */
- xmlChar *snapshot_mode_content =
- xmlNodeGetContent(attributes_child);
- if (!snapshot_mode_content) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
-
- ret = parse_bool(snapshot_mode_content, &snapshot_mode);
- free(snapshot_mode_content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto error;
- }
- } else if (!strcmp((const char *) attributes_child->name,
- config_element_live_timer_interval)) {
- /* live_timer_interval */
- xmlChar *timer_interval_content =
- xmlNodeGetContent(attributes_child);
- if (!timer_interval_content) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
-
- ret = parse_uint(timer_interval_content, &live_timer_interval);
- free(timer_interval_content);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto error;
- }
- } else if (!strcmp((const char *) attributes_child->name,
- config_element_rotation_schedules)) {
- ret = process_session_rotation_schedules_node(
- attributes_child,
- &rotation_timer_interval,
- &rotation_size);
- if (ret) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto error;
- }
-
- }
- }
- }
- }
-
- if (!name) {
- /* Mandatory attribute, as defined in the session XSD */
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto error;
- }
-
- if (session_name && strcmp((char *) name, session_name)) {
- /* This is not the session we are looking for */
- ret = -LTTNG_ERR_NO_SESSION;
- goto error;
- }
-
- /* Init domains to create the session handles */
- for (node = xmlFirstElementChild(domains_node); node;
- node = xmlNextElementSibling(node)) {
- struct lttng_domain *domain;
-
- domain = zmalloc(sizeof(*domain));
- if (!domain) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
-
- ret = init_domain(node, domain);
- if (ret) {
- goto domain_init_error;
- }
-
- switch (domain->type) {
- case LTTNG_DOMAIN_KERNEL:
- if (kernel_domain) {
- /* Same domain seen twice, invalid! */
- goto domain_init_error;
- }
- kernel_domain = domain;
- break;
- case LTTNG_DOMAIN_UST:
- if (ust_domain) {
- /* Same domain seen twice, invalid! */
- goto domain_init_error;
- }
- ust_domain = domain;
- break;
- case LTTNG_DOMAIN_JUL:
- if (jul_domain) {
- /* Same domain seen twice, invalid! */
- goto domain_init_error;
- }
- jul_domain = domain;
- break;
- case LTTNG_DOMAIN_LOG4J:
- if (log4j_domain) {
- /* Same domain seen twice, invalid! */
- goto domain_init_error;
- }
- log4j_domain = domain;
- break;
- case LTTNG_DOMAIN_PYTHON:
- if (python_domain) {
- /* Same domain seen twice, invalid! */
- goto domain_init_error;
- }
- python_domain = domain;
- break;
- default:
- WARN("Invalid domain type");
- goto domain_init_error;
- }
- continue;
-domain_init_error:
- free(domain);
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto error;
- }
-
- /* Apply overrides */
- if (overrides) {
- if (overrides->session_name) {
- xmlChar *name_override = xmlStrdup(BAD_CAST(overrides->session_name));
- if (!name_override) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
-
- /* Overrides the session name to the provided name */
- xmlFree(name);
- name = name_override;
- }
- }
-
- if (overwrite) {
- /* Destroy session if it exists */
- ret = lttng_destroy_session((const char *) name);
- if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) {
- ERR("Failed to destroy existing session.");
- goto error;
- }
- }
-
- /* Create session type depending on output type */
- if (snapshot_mode && snapshot_mode != -1) {
- ret = create_snapshot_session((const char *) name, output_node,
- overrides);
- } else if (live_timer_interval &&
- live_timer_interval != UINT64_MAX) {
- ret = create_session((const char *) name,
- output_node, live_timer_interval, overrides);
- } else {
- /* regular session */
- ret = create_session((const char *) name,
- output_node, UINT64_MAX, overrides);
- }
- if (ret) {
- goto error;
- }
-
- if (shm_path) {
- ret = lttng_set_session_shm_path((const char *) name,
- (const char *) shm_path);
- if (ret) {
- goto error;
- }
- }
-
- for (node = xmlFirstElementChild(domains_node); node;
- node = xmlNextElementSibling(node)) {
- ret = process_domain_node(node, (const char *) name);
- if (ret) {
- goto end;
- }
- }
-
- if (rotation_timer_interval) {
- ret = add_periodic_rotation((const char *) name,
- rotation_timer_interval);
- if (ret < 0) {
- goto error;
- }
- }
- if (rotation_size) {
- ret = add_size_rotation((const char *) name,
- rotation_size);
- if (ret < 0) {
- goto error;
- }
- }
-
- if (started) {
- ret = lttng_start_tracing((const char *) name);
- if (ret) {
- goto end;
- }
- }
-
-end:
- if (ret < 0) {
- ERR("Failed to load session %s: %s", (const char *) name,
- lttng_strerror(ret));
- lttng_destroy_session((const char *) name);
- }
-
-error:
- free(kernel_domain);
- free(ust_domain);
- free(jul_domain);
- free(log4j_domain);
- free(python_domain);
- xmlFree(name);
- xmlFree(shm_path);
- return ret;
-}
-
-/*
- * Return 1 if the given path is readable by the current UID or 0 if not.
- * Return -1 if the path is EPERM.
- */
-static int validate_file_read_creds(const char *path)
-{
- int ret;
-
- LTTNG_ASSERT(path);
-
- /* Can we read the file. */
- ret = access(path, R_OK);
- if (!ret) {
- goto valid;
- }
- if (errno == EACCES) {
- return -1;
- } else {
- /* Invalid. */
- return 0;
- }
-valid:
- return 1;
-}
-
-static
-int load_session_from_file(const char *path, const char *session_name,
- struct session_config_validation_ctx *validation_ctx, int overwrite,
- const struct config_load_session_override_attr *overrides)
-{
- int ret, session_found = !session_name;
- xmlDocPtr doc = NULL;
- xmlNodePtr sessions_node;
- xmlNodePtr session_node;
-
- LTTNG_ASSERT(path);
- LTTNG_ASSERT(validation_ctx);
-
- ret = validate_file_read_creds(path);
- if (ret != 1) {
- if (ret == -1) {
- ret = -LTTNG_ERR_EPERM;
- } else {
- ret = -LTTNG_ERR_LOAD_SESSION_NOENT;
- }
- goto end;
- }
-
- doc = xmlParseFile(path);
- if (!doc) {
- ret = -LTTNG_ERR_LOAD_IO_FAIL;
- goto end;
- }
-
- ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, doc);
- if (ret) {
- ERR("Session configuration file validation failed");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- sessions_node = xmlDocGetRootElement(doc);
- if (!sessions_node) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- for (session_node = xmlFirstElementChild(sessions_node);
- session_node; session_node =
- xmlNextElementSibling(session_node)) {
- ret = process_session_node(session_node,
- session_name, overwrite, overrides);
- if (!session_name && ret) {
- /* Loading error occurred. */
- goto end;
- } else if (session_name) {
- if (ret == 0) {
- /* Target session found and loaded */
- session_found = 1;
- break;
- } else if (ret == -LTTNG_ERR_NO_SESSION) {
- /*
- * Ignore this error, we are looking for a
- * specific session.
- */
- ret = 0;
- } else {
- /* Loading error occurred. */
- goto end;
- }
- }
- }
-end:
- xmlFreeDoc(doc);
- if (!ret) {
- ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT;
- }
- return ret;
-}
-
-static
-int load_session_from_path(const char *path, const char *session_name,
- struct session_config_validation_ctx *validation_ctx, int overwrite,
- const struct config_load_session_override_attr *overrides)
-{
- int ret, session_found = !session_name;
- DIR *directory = NULL;
- struct lttng_dynamic_buffer file_path;
- size_t path_len;
-
- LTTNG_ASSERT(path);
- LTTNG_ASSERT(validation_ctx);
- path_len = strlen(path);
- lttng_dynamic_buffer_init(&file_path);
- if (path_len >= LTTNG_PATH_MAX) {
- ERR("Session configuration load path \"%s\" length (%zu) exceeds the maximal length allowed (%d)",
- path, path_len, LTTNG_PATH_MAX);
- ret = -LTTNG_ERR_INVALID;
- goto end;
- }
-
- directory = opendir(path);
- if (!directory) {
- switch (errno) {
- case ENOTDIR:
- /* Try the file loading. */
- break;
- case ENOENT:
- ret = -LTTNG_ERR_LOAD_SESSION_NOENT;
- goto end;
- default:
- ret = -LTTNG_ERR_LOAD_IO_FAIL;
- goto end;
- }
- }
- if (directory) {
- size_t file_path_root_len;
-
- ret = lttng_dynamic_buffer_set_capacity(&file_path,
- LTTNG_PATH_MAX);
- if (ret) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = lttng_dynamic_buffer_append(&file_path, path, path_len);
- if (ret) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- if (file_path.data[file_path.size - 1] != '/') {
- ret = lttng_dynamic_buffer_append(&file_path, "/", 1);
- if (ret) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
- }
- file_path_root_len = file_path.size;
-
- /* Search for *.lttng files */
- for (;;) {
- size_t file_name_len;
- struct dirent *result;
-
- /*
- * When the end of the directory stream is reached, NULL
- * is returned and errno is kept unchanged. When an
- * error occurs, NULL is returned and errno is set
- * accordingly. To distinguish between the two, set
- * errno to zero before calling readdir().
- *
- * On success, readdir() returns a pointer to a dirent
- * structure. This structure may be statically
- * allocated, do not attempt to free(3) it.
- */
- errno = 0;
- result = readdir(directory);
-
- /* Reached end of dir stream or error out. */
- if (!result) {
- if (errno) {
- PERROR("Failed to enumerate the contents of path \"%s\" while loading session, readdir returned", path);
- ret = -LTTNG_ERR_LOAD_IO_FAIL;
- goto end;
- }
- break;
- }
-
- file_name_len = strlen(result->d_name);
-
- if (file_name_len <=
- sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) {
- continue;
- }
-
- if (file_path.size + file_name_len >= LTTNG_PATH_MAX) {
- WARN("Ignoring file \"%s\" since the path's length (%zu) would exceed the maximal permitted size (%d)",
- result->d_name,
- /* +1 to account for NULL terminator. */
- file_path.size + file_name_len + 1,
- LTTNG_PATH_MAX);
- continue;
- }
-
- /* Does the file end with .lttng? */
- if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION,
- result->d_name + file_name_len - sizeof(
- DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1)) {
- continue;
- }
-
- ret = lttng_dynamic_buffer_append(&file_path, result->d_name,
- file_name_len + 1);
- if (ret) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = load_session_from_file(file_path.data, session_name,
- validation_ctx, overwrite, overrides);
- if (session_name &&
- (!ret || ret != -LTTNG_ERR_LOAD_SESSION_NOENT)) {
- session_found = 1;
- break;
- }
- if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) {
- goto end;
- }
- /*
- * Reset the buffer's size to the location of the
- * path's trailing '/'.
- */
- ret = lttng_dynamic_buffer_set_size(&file_path,
- file_path_root_len);
- if (ret) {
- ret = -LTTNG_ERR_UNK;
- goto end;
- }
- }
- } else {
- ret = load_session_from_file(path, session_name,
- validation_ctx, overwrite, overrides);
- if (ret) {
- goto end;
- }
- session_found = 1;
- }
-
- ret = 0;
-end:
- if (directory) {
- if (closedir(directory)) {
- PERROR("closedir");
- }
- }
- if (!ret && !session_found) {
- ret = -LTTNG_ERR_LOAD_SESSION_NOENT;
- }
- lttng_dynamic_buffer_reset(&file_path);
- return ret;
-}
-
-/*
- * Validate that the given path's credentials and the current process have the
- * same UID. If so, return 1 else return 0 if it does NOT match.
- */
-static int validate_path_creds(const char *path)
-{
- int ret, uid = getuid();
- struct stat buf;
-
- LTTNG_ASSERT(path);
-
- if (uid == 0) {
- goto valid;
- }
-
- ret = stat(path, &buf);
- if (ret < 0) {
- if (errno != ENOENT) {
- PERROR("stat");
- }
- goto valid;
- }
-
- if (buf.st_uid != uid) {
- goto invalid;
- }
-
-valid:
- return 1;
-invalid:
- return 0;
-}
-
-int config_load_session(const char *path, const char *session_name,
- int overwrite, unsigned int autoload,
- const struct config_load_session_override_attr *overrides)
-{
- int ret;
- bool session_loaded = false;
- const char *path_ptr = NULL;
- struct session_config_validation_ctx validation_ctx = { 0 };
-
- ret = init_session_config_validation_ctx(&validation_ctx);
- if (ret) {
- goto end;
- }
-
- if (!path) {
- const char *home_path;
- const char *sys_path;
-
- /* Try home path */
- home_path = utils_get_home_dir();
- if (home_path) {
- char path_buf[PATH_MAX];
-
- /*
- * Try user session configuration path. Ignore error here so we can
- * continue loading the system wide sessions.
- */
- if (autoload) {
- ret = snprintf(path_buf, sizeof(path_buf),
- DEFAULT_SESSION_HOME_CONFIGPATH
- "/" DEFAULT_SESSION_CONFIG_AUTOLOAD,
- home_path);
- if (ret < 0) {
- PERROR("snprintf session autoload home config path");
- ret = -LTTNG_ERR_INVALID;
- goto end;
- }
-
- /*
- * Credentials are only validated for the autoload in order to
- * avoid any user session daemon to try to load kernel sessions
- * automatically and failing all the times.
- */
- ret = validate_path_creds(path_buf);
- if (ret) {
- path_ptr = path_buf;
- }
- } else {
- ret = snprintf(path_buf, sizeof(path_buf),
- DEFAULT_SESSION_HOME_CONFIGPATH,
- home_path);
- if (ret < 0) {
- PERROR("snprintf session home config path");
- ret = -LTTNG_ERR_INVALID;
- goto end;
- }
- path_ptr = path_buf;
- }
- if (path_ptr) {
- ret = load_session_from_path(path_ptr, session_name,
- &validation_ctx, overwrite, overrides);
- if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) {
- goto end;
- }
- /*
- * Continue even if the session was found since we have to try
- * the system wide sessions.
- */
- session_loaded = true;
- }
- }
-
- /* Reset path pointer for the system wide dir. */
- path_ptr = NULL;
-
- /* Try system wide configuration directory. */
- if (autoload) {
- sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH "/"
- DEFAULT_SESSION_CONFIG_AUTOLOAD;
- ret = validate_path_creds(sys_path);
- if (ret) {
- path_ptr = sys_path;
- }
- } else {
- sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH;
- path_ptr = sys_path;
- }
-
- if (path_ptr) {
- ret = load_session_from_path(path_ptr, session_name,
- &validation_ctx, overwrite, overrides);
- if (!ret) {
- session_loaded = true;
- }
- } else {
- ret = 0;
- }
- } else {
- ret = access(path, F_OK);
- if (ret < 0) {
- PERROR("access");
- switch (errno) {
- case ENOENT:
- ret = -LTTNG_ERR_INVALID;
- WARN("Session configuration path does not exist.");
- break;
- case EACCES:
- ret = -LTTNG_ERR_EPERM;
- break;
- default:
- ret = -LTTNG_ERR_UNK;
- break;
- }
- goto end;
- }
-
- ret = load_session_from_path(path, session_name,
- &validation_ctx, overwrite, overrides);
- }
-end:
- fini_session_config_validation_ctx(&validation_ctx);
- if (ret == -LTTNG_ERR_LOAD_SESSION_NOENT && !session_name && !path) {
- /*
- * Don't report an error if no sessions are found when called
- * without a session_name or a search path.
- */
- ret = 0;
- }
-
- if (session_loaded && ret == -LTTNG_ERR_LOAD_SESSION_NOENT) {
- /* A matching session was found in one of the search paths. */
- ret = 0;
- }
- return ret;
-}
-
-static
-void __attribute__((destructor)) session_config_exit(void)
-{
- xmlCleanupParser();
-}
projects / lttng-tools.git / blobdiff