#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 <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"
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_event_context_hostname = "HOSTNAME";
const char * const config_event_context_ip = "IP";
+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)
{
}
ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name,
- encoded_value);
+ 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);
+ if (ret == -1) {
+ ERR("String allocation failed in xml error handler");
+ return;
+ }
+ va_end(args);
+
+ 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
+int init_session_config_validation_ctx(
+ struct session_config_validation_ctx *ctx)
+{
+ int ret;
+
+ ctx->parser_ctx = xmlSchemaNewParserCtxt(DEFAULT_SESSION_CONFIG_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);
+ }
+
+ 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 {
+ 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,
+ xmlNodePtr output_node,
+ uint64_t live_timer_interval)
+{
+ int ret;
+ struct consumer_output output = { 0 };
+ xmlNodePtr consumer_output_node;
+
+ assert(name);
+ assert(kernel_domain);
+ assert(ust_domain);
+ assert(jul_domain);
+
+ 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 };
+
+ /* network destination */
+ if (live_timer_interval && live_timer_interval != UINT64_MAX) {
+ const char *url = output.control_uri ?
+ output.control_uri : output.data_uri;
+
+ /* URL has to be provided, even if we'll overwrite it after. */
+ ret = lttng_create_session_live(name, url, live_timer_interval);
+ } else {
+ ret = lttng_create_session(name, NULL);
+ }
+ if (ret) {
+ goto end;
+ }
+
+ for (i = 0; i < (sizeof(domains) / sizeof(*domain)); 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));
+
+ 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);
+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 = LTTNG_EVENT_CONTEXT_PERF_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_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 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;
+ }
+ }
+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;
+ char *name = 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;
+
+ 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 end;
+ }
+
+ name = (char *) 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 end;
+ }
+
+ ret = parse_bool(node_content, &started);
+ free(node_content);
+ if (ret) {
+ ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
+ goto end;
+ }
+ } else if (!output_node && !strcmp((const char *) node->name,
+ config_element_output)) {
+ /* output */
+ output_node = node;
+ } 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 end;
+ }
+
+ ret = parse_bool(snapshot_mode_content, &snapshot_mode);
+ free(snapshot_mode_content);
+ if (ret) {
+ ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
+ goto end;
+ }
+ } else {
+ /* live_timer_interval */
+ xmlChar *timer_interval_content =
+ xmlNodeGetContent(attributes_child);
+ if (!timer_interval_content) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ ret = parse_uint(timer_interval_content, &live_timer_interval);
+ free(timer_interval_content);
+ if (ret) {
+ ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
+ goto end;
+ }
+ }
+ }
+ }
+
+ if (!name) {
+ /* Mandatory attribute, as defined in the session XSD */
+ ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
+ goto end;
+ }
+
+ if (session_name && strcmp(name, session_name)) {
+ /* This is not the session we are looking for */
+ ret = -LTTNG_ERR_LOAD_SESSION_NOT_FOUND;
+ goto end;
+ }
+
+ /* 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 end;
+ }
+
+ ret = init_domain(node, domain);
+ if (ret) {
+ goto domain_init_error;
+ }
+
+ switch (domain->type) {
+ case LTTNG_DOMAIN_KERNEL:
+ kernel_domain = domain;
+ break;
+ case LTTNG_DOMAIN_UST:
+ ust_domain = domain;
+ break;
+ case LTTNG_DOMAIN_JUL:
+ jul_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 end;
+ }
+
+ if (override) {
+ /* Destroy session if it exists */
+ ret = lttng_destroy_session(name);
+ if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) {
+ ERR("Failed to destroy existing session.");
+ goto end;
+ }
+ }
+
+ /* Create session type depending on output type */
+ if (snapshot_mode && snapshot_mode != -1) {
+ ret = create_snapshot_session(name, output_node);
+ } else if (live_timer_interval &&
+ live_timer_interval != UINT64_MAX) {
+ ret = create_session(name, kernel_domain, ust_domain, jul_domain,
+ output_node, live_timer_interval);
+ } else {
+ /* regular session */
+ ret = create_session(name, kernel_domain, ust_domain, jul_domain,
+ output_node, UINT64_MAX);
+ }
+
+ if (ret) {
+ goto end;
+ }
+
+ for (node = xmlFirstElementChild(domains_node); node;
+ node = xmlNextElementSibling(node)) {
+ ret = process_domain_node(node, name);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ if (started) {
+ ret = lttng_start_tracing(name);
+ if (ret) {
+ goto end;
+ }
+ }
+end:
+ free(kernel_domain);
+ free(ust_domain);
+ free(jul_domain);
+ free(name);
+ return ret;
+}
+
+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;
+ struct stat sb;
+
+ assert(path);
+ assert(validation_ctx);
+
+ ret = stat(path, &sb);
+ if (ret) {
+ 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_NOT_FOUND;
+ }
+ return ret;
+}
+
+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;
+ struct stat sb;
+ DIR *directory = NULL;
+
+ assert(path);
+ assert(validation_ctx);
+
+ ret = stat(path, &sb);
+ if (ret) {
+ ret = -LTTNG_ERR_LOAD_SESSION_NOENT;
+ goto end;
+ }
+ if (S_ISDIR(sb.st_mode)) {
+ 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 = zmalloc(sizeof(*entry));
+ if (!entry) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ directory = opendir(path);
+ if (!directory) {
+ ret = -LTTNG_ERR_LOAD_IO_FAIL;
+ free(entry);
+ 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++] = '/';
+ }
+
+ /* 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_NOT_FOUND;
+ }
+
+ return ret;
+}
+
+LTTNG_HIDDEN
+int config_load_session(const char *path, const char *session_name,
+ int override)
+{
+ int ret;
+ struct session_config_validation_ctx validation_ctx = { 0 };
+
+ ret = init_session_config_validation_ctx(&validation_ctx);
+ if (ret) {
+ goto end;
+ }
+
+ if (!path) {
+ /* Try home path */
+ char *home_path = utils_get_home_dir();
+ if (home_path) {
+ char *path;
+
+ ret = asprintf(&path, DEFAULT_SESSION_HOME_CONFIGPATH,
+ home_path);
+ if (ret < 0) {
+ goto end;
+ }
+
+ ret = load_session_from_path(path, NULL,
+ &validation_ctx, 0);
+ if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) {
+ free(path);
+ goto end;
+ }
+
+ free(path);
+ }
+
+ /* Try system session configuration path */
+ ret = load_session_from_path(DEFAULT_SESSION_SYSTEM_CONFIGPATH, NULL,
+ &validation_ctx, 0);
+ if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) {
+ goto end;
+ }
+ } 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);
+ return ret;
+}
projects / lttng-tools.git / commitdiff
