+++ /dev/null
-/*
- * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License, version 2 only, as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#define _LGPL_SOURCE
-#include <assert.h>
-#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 <common/defaults.h>
-#include <common/error.h>
-#include <common/macros.h>
-#include <common/utils.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 "config.h"
-#include "config-internal.h"
-
-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_str_yes = "yes";
-const char * const config_str_true = "true";
-const char * const config_str_on = "on";
-const char * const config_str_no = "no";
-const char * const config_str_false = "false";
-const char * const config_str_off = "off";
-const char * const config_xml_encoding = "UTF-8";
-const size_t config_xml_encoding_bytes_per_char = 2; /* Size of the encoding's largest character */
-const char * const config_xml_indent_string = "\t";
-const char * const config_xml_true = "true";
-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_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_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_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_perf = "perf";
-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_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_pid_tracker = "pid_tracker";
-const char * const config_element_trackers = "trackers";
-const char * const config_element_targets = "targets";
-const char * const config_element_target_pid = "pid_target";
-
-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_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";
-
-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 };
-
- 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;
-}
-
-LTTNG_HIDDEN
-int config_get_section_entries(const char *override_path, const char *section,
- config_entry_handler_cb handler, void *user_data)
-{
- int ret = 0;
- 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;
-}
-
-LTTNG_HIDDEN
-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;
-
- 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;
-}
-
-LTTNG_HIDDEN
-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;
-}
-
-LTTNG_HIDDEN
-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;
-}
-
-LTTNG_HIDDEN
-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;
-}
-
-LTTNG_HIDDEN
-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;
-}
-
-LTTNG_HIDDEN
-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;
-}
-
-LTTNG_HIDDEN
-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;
-}
-
-LTTNG_HIDDEN
-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);
-}
-
-LTTNG_HIDDEN
-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()
-{
- 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;
- }
-
- strncpy(xsd_path, base_path, max_path_len);
- if (xsd_path[base_path_len - 1] != '/') {
- xsd_path[base_path_len++] = '/';
- }
-
- strncpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME,
- max_path_len - base_path_len);
-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)) {
- *val = 1;
- } else if (!strcmp((const char *) str, config_xml_false)) {
- *val = 0;
- } else {
- WARN("Invalid boolean value encoutered (%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_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 {
- 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;
-
- 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, struct lttng_domain *domain,
- const char *control_uri, const char *data_uri)
-{
- int ret;
- struct lttng_handle *handle;
- const char *uri = NULL;
-
- assert(name);
- assert(domain);
-
- handle = lttng_create_handle(name, domain);
- 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)
-{
- int ret;
- xmlNodePtr node = NULL;
- xmlNodePtr snapshot_output_list_node;
- xmlNodePtr snapshot_output_node;
-
- 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;
-
- 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;
- }
- }
- }
-
- 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 (output.path) {
- ret = lttng_snapshot_output_set_ctrl_url(output.path,
- snapshot_output);
- if (ret) {
- goto error_snapshot_output;
- }
- } else {
- if (output.control_uri) {
- ret = lttng_snapshot_output_set_ctrl_url(output.control_uri,
- snapshot_output);
- if (ret) {
- goto error_snapshot_output;
- }
- }
-
- if (output.data_uri) {
- ret = lttng_snapshot_output_set_data_url(output.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,
- struct lttng_domain *kernel_domain,
- struct lttng_domain *ust_domain,
- struct lttng_domain *jul_domain,
- struct lttng_domain *log4j_domain,
- xmlNodePtr output_node,
- uint64_t live_timer_interval)
-{
- int ret;
- struct consumer_output output = { 0 };
- xmlNodePtr consumer_output_node;
-
- 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;
- }
- }
-
- if (live_timer_interval != UINT64_MAX &&
- !output.control_uri && !output.data_uri) {
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- if (output.control_uri || output.data_uri) {
- int i;
- struct lttng_domain *domain;
- struct lttng_domain *domains[] =
- { kernel_domain, ust_domain, jul_domain, log4j_domain };
-
- /* 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;
- }
-
- for (i = 0; i < (sizeof(domains) / sizeof(domains[0])); i++) {
- domain = domains[i];
- if (!domain) {
- continue;
- }
-
- ret = create_session_net_output(name, domain, output.control_uri,
- output.data_uri);
- if (ret) {
- goto end;
- }
- }
- } else {
- /* either local output or no output */
- ret = lttng_create_session(name, output.path);
- if (ret) {
- goto end;
- }
- }
-end:
- free(output.path);
- free(output.control_uri);
- free(output.data_uri);
- return ret;
-}
-static
-int process_probe_attribute_node(xmlNodePtr probe_attribute_node,
- struct lttng_event_probe_attr *attr)
-{
- int ret;
-
- assert(probe_attribute_node);
- 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;
- size_t name_len;
-
- /* symbol_name */
- content = xmlNodeGetContent(probe_attribute_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- name_len = strlen((char *) content);
- if (name_len >= LTTNG_SYMBOL_NAME_LEN) {
- WARN("symbol_name too long.");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- free(content);
- goto end;
- }
-
- strncpy(attr->symbol_name, (const char *) content, name_len);
- free(content);
- }
- ret = 0;
-end:
- return ret;
-}
-
-static
-int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle,
- const char *channel_name)
-{
- int ret, i;
- xmlNodePtr node;
- struct lttng_event event;
- char **exclusions = NULL;
- unsigned long exclusion_count = 0;
- char *filter_expression = NULL;
-
- assert(event_node);
- assert(handle);
- assert(channel_name);
-
- memset(&event, 0, sizeof(event));
-
- /* 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:
- assert(0);
- }
-
- for (node = xmlFirstElementChild(event_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name, config_element_name)) {
- xmlChar *content;
- size_t name_len;
-
- /* name */
- content = xmlNodeGetContent(node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- name_len = strlen((char *) content);
- if (name_len >= LTTNG_SYMBOL_NAME_LEN) {
- WARN("Channel name too long.");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- free(content);
- goto end;
- }
-
- strncpy(event.name, (const char *) content, name_len);
- 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;
- }
-
- 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 *) 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 {
- 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;
- }
-
- strncpy(event.attr.ftrace.symbol_name, (char *) content,
- sym_len);
- free(content);
- }
- }
- }
-
- ret = lttng_enable_event_with_exclusions(handle, &event, channel_name,
- filter_expression, exclusion_count, exclusions);
- if (ret) {
- goto end;
- }
-
- if (!event.enabled) {
- /*
- * Note that we should use lttng_disable_event_ext() (2.6+) to
- * eliminate the risk of clashing on events of the same
- * name (with different event types and loglevels).
- *
- * Unfortunately, lttng_disable_event_ext() only performs a
- * match on the name and event type and errors out if any other
- * event attribute is not set to its default value.
- *
- * This will disable all events that match this name.
- */
- ret = lttng_disable_event(handle, event.name, channel_name);
- }
-end:
- for (i = 0; i < exclusion_count; i++) {
- free(exclusions[i]);
- }
-
- 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;
- xmlNodePtr node;
-
- assert(events_node);
- assert(handle);
- assert(channel_name);
-
- for (node = xmlFirstElementChild(events_node); node;
- node = xmlNextElementSibling(node)) {
- ret = process_event_node(node, handle, channel_name);
- 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;
-
- assert(attr_node);
- assert(channel);
- assert(contexts_node);
- assert(events_node);
-
- if (!strcmp((const char *) attr_node->name, config_element_name)) {
- xmlChar *content;
- size_t name_len;
-
- /* name */
- content = xmlNodeGetContent(attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- name_len = strlen((char *) content);
- if (name_len >= LTTNG_SYMBOL_NAME_LEN) {
- WARN("Channel name too long.");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- free(content);
- goto end;
- }
-
- strncpy(channel->name, (const char *) content, name_len);
- 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_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);
-
- assert(handle);
- 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 {
- xmlNodePtr perf_attr_node;
-
- /* perf */
- 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;
- size_t name_len;
-
- /* name */
- content = xmlNodeGetContent(perf_attr_node);
- if (!content) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- name_len = strlen((char *) content);
- if (name_len >= LTTNG_SYMBOL_NAME_LEN) {
- WARN("perf context name too long.");
- ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
- free(content);
- goto end;
- }
-
- strncpy(context.u.perf_counter.name, (const char *) content,
- name_len);
- free(content);
- }
- }
- }
-
- ret = lttng_add_context(handle, &context, NULL, channel_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 process_pid_tracker_node(xmlNodePtr pid_tracker_node,
- struct lttng_handle *handle)
-{
- int ret = 0, child;
- xmlNodePtr targets_node = NULL;
- xmlNodePtr node;
-
- assert(handle);
- assert(pid_tracker_node);
- /* get the targets node */
- for (node = xmlFirstElementChild(pid_tracker_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name,
- config_element_targets)) {
- targets_node = node;
- break;
- }
- }
-
- if (!targets_node) {
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- /* Go through all pid_target node */
- child = xmlChildElementCount(targets_node);
- if (child == 0) {
- /* The session is explicitly set to target nothing. */
- ret = lttng_untrack_pid(handle, -1);
- if (ret) {
- goto end;
- }
- }
- for (node = xmlFirstElementChild(targets_node); node;
- node = xmlNextElementSibling(node)) {
- xmlNodePtr pid_target_node = node;
-
- /* get pid node and track it */
- for (node = xmlFirstElementChild(pid_target_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name,
- config_element_pid)) {
- int64_t pid;
- xmlChar *content = NULL;
-
- content = xmlNodeGetContent(node);
- if (!content) {
- ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- ret = parse_int(content, &pid);
- free(content);
- if (ret) {
- ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
- goto end;
- }
-
- ret = lttng_track_pid(handle, (int) pid);
- if (ret) {
- goto end;
- }
- }
- }
- node = pid_target_node;
- }
-
-end:
- 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;
- xmlNodePtr channels_node = NULL;
- xmlNodePtr trackers_node = NULL;
- xmlNodePtr pid_tracker_node = NULL;
- xmlNodePtr node;
-
- 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)) {
- struct lttng_channel channel;
- xmlNodePtr contexts_node = NULL;
- xmlNodePtr events_node = NULL;
- xmlNodePtr channel_attr_node;
-
- memset(&channel, 0, sizeof(channel));
- lttng_channel_set_default_attr(&domain, &channel.attr);
-
- 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;
- }
-
- 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;
- }
- }
-
- /* get the trackers node */
- for (node = xmlFirstElementChild(domain_node); node;
- node = xmlNextElementSibling(node)) {
- if (!strcmp((const char *) node->name,
- config_element_trackers)) {
- 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_pid_tracker)) {
- pid_tracker_node = node;
- ret = process_pid_tracker_node(pid_tracker_node, handle);
- if (ret) {
- goto end;
- }
- }
- }
-
- if (!pid_tracker_node) {
- lttng_track_pid(handle, -1);
- }
-
-end:
- lttng_destroy_handle(handle);
- return ret;
-}
-
-static
-int process_session_node(xmlNodePtr session_node, const char *session_name,
- int override)
-{
- int ret, started = -1, snapshot_mode = -1;
- uint64_t live_timer_interval = UINT64_MAX;
- xmlChar *name = NULL;
- xmlChar *shm_path = NULL;
- xmlNodePtr domains_node = NULL;
- xmlNodePtr output_node = NULL;
- xmlNodePtr node;
- 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 or live_timer_interval */
- xmlNodePtr attributes_child =
- xmlFirstElementChild(node);
-
- 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 {
- /* 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;
- }
- }
- }
- }
-
- 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;
- }
-
- if (override) {
- /* 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);
- } else if (live_timer_interval &&
- live_timer_interval != UINT64_MAX) {
- ret = create_session((const char *) name, kernel_domain,
- ust_domain, jul_domain, log4j_domain,
- output_node, live_timer_interval);
- } else {
- /* regular session */
- ret = create_session((const char *) name, kernel_domain,
- ust_domain, jul_domain, log4j_domain,
- output_node, UINT64_MAX);
- }
- 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 (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;
-
- 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 override)
-{
- int ret, session_found = !session_name;
- xmlDocPtr doc = NULL;
- xmlNodePtr sessions_node;
- xmlNodePtr session_node;
-
- assert(path);
- 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) {
- goto end;
- }
-
- for (session_node = xmlFirstElementChild(sessions_node);
- session_node; session_node =
- xmlNextElementSibling(session_node)) {
- ret = process_session_node(session_node,
- session_name, override);
- if (session_name && ret == 0) {
- /* Target session found and loaded */
- session_found = 1;
- break;
- }
- }
-end:
- xmlFreeDoc(doc);
- if (!ret) {
- ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT;
- }
- return ret;
-}
-
-/* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */
-static
-struct dirent *alloc_dirent(const char *path)
-{
- size_t len;
- long name_max;
- struct dirent *entry;
-
- name_max = pathconf(path, _PC_NAME_MAX);
- if (name_max == -1) {
- name_max = PATH_MAX;
- }
- len = offsetof(struct dirent, d_name) + name_max + 1;
- entry = zmalloc(len);
- return entry;
-}
-
-static
-int load_session_from_path(const char *path, const char *session_name,
- struct session_config_validation_ctx *validation_ctx, int override)
-{
- int ret, session_found = !session_name;
- DIR *directory = NULL;
-
- assert(path);
- assert(validation_ctx);
-
- 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) {
- struct dirent *entry;
- struct dirent *result;
- char *file_path = NULL;
- size_t path_len = strlen(path);
-
- if (path_len >= PATH_MAX) {
- ret = -LTTNG_ERR_INVALID;
- goto end;
- }
-
- entry = alloc_dirent(path);
- if (!entry) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- file_path = zmalloc(PATH_MAX);
- if (!file_path) {
- ret = -LTTNG_ERR_NOMEM;
- free(entry);
- goto end;
- }
-
- strncpy(file_path, path, path_len);
- if (file_path[path_len - 1] != '/') {
- file_path[path_len++] = '/';
- }
-
- ret = 0;
- /* Search for *.lttng files */
- while (!readdir_r(directory, entry, &result) && result) {
- size_t file_name_len = strlen(result->d_name);
-
- if (file_name_len <=
- sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) {
- continue;
- }
-
- if (path_len + file_name_len >= PATH_MAX) {
- continue;
- }
-
- if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION,
- result->d_name + file_name_len - sizeof(
- DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1)) {
- continue;
- }
-
- strncpy(file_path + path_len, result->d_name, file_name_len);
- file_path[path_len + file_name_len] = '\0';
-
- ret = load_session_from_file(file_path, session_name,
- validation_ctx, override);
- if (session_name && !ret) {
- session_found = 1;
- break;
- }
- }
-
- free(entry);
- free(file_path);
- } else {
- ret = load_session_from_file(path, session_name,
- validation_ctx, override);
- if (ret) {
- goto end;
- } else {
- session_found = 1;
- }
- }
-
-end:
- if (directory) {
- if (closedir(directory)) {
- PERROR("closedir");
- }
- }
-
- if (!session_found) {
- ret = -LTTNG_ERR_LOAD_SESSION_NOENT;
- }
-
- 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;
-
- assert(path);
-
- if (uid == 0) {
- goto valid;
- }
-
- ret = stat(path, &buf);
- if (ret < 0) {
- if (errno != ENOENT) {
- PERROR("stat");
- }
- ret = -LTTNG_ERR_INVALID;
- goto valid;
- }
-
- if (buf.st_uid != uid) {
- goto invalid;
- }
-
-valid:
- return 1;
-invalid:
- return 0;
-}
-
-LTTNG_HIDDEN
-int config_load_session(const char *path, const char *session_name,
- int override, unsigned int autoload)
-{
- int ret;
- 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) {
- char *home_path;
- const char *sys_path;
-
- /* Try home path */
- home_path = utils_get_home_dir();
- if (home_path) {
- char path[PATH_MAX];
-
- /*
- * Try user session configuration path. Ignore error here so we can
- * continue loading the system wide sessions.
- */
- if (autoload) {
- ret = snprintf(path, sizeof(path),
- DEFAULT_SESSION_HOME_CONFIGPATH "/"
- DEFAULT_SESSION_CONFIG_AUTOLOAD, home_path);
- if (ret < 0) {
- PERROR("snprintf session autoload home config path");
- 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);
- if (ret) {
- path_ptr = path;
- }
- } else {
- ret = snprintf(path, sizeof(path),
- DEFAULT_SESSION_HOME_CONFIGPATH, home_path);
- if (ret < 0) {
- PERROR("snprintf session home config path");
- goto end;
- }
- path_ptr = path;
- }
- if (path_ptr) {
- ret = load_session_from_path(path_ptr, session_name,
- &validation_ctx, override);
- 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.
- */
- }
- }
-
- /* 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, override);
- }
- } 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, override);
- }
-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;
- }
- return ret;
-}
projects / lttng-tools.git / blobdiff