return san_path;
}
+/*
+ * Find a path based on `path` that doesn't exist yet. First, try `path`
+ * itself, then try with incrementing suffixes.
+ */
+
static
-GString *make_unique_trace_path(struct fs_sink_comp *fs_sink,
- const char *output_dir_path, const char *base)
+GString *make_unique_trace_path(const char *path)
{
- GString *path = g_string_new(output_dir_path);
- GString *san_base = NULL;
+ GString *unique_path;
unsigned int suffix = 0;
- if (fs_sink->assume_single_trace) {
- /* Use output directory directly */
+ unique_path = g_string_new(path);
+
+ while (g_file_test(unique_path->str, G_FILE_TEST_EXISTS)) {
+ g_string_printf(unique_path, "%s-%u", path, suffix);
+ suffix++;
+ }
+
+ return unique_path;
+}
+
+/*
+ * Validate that the input string `datetime` is an ISO8601-compliant string (the
+ * format used by LTTng in the metadata).
+ */
+
+static
+int lttng_validate_datetime(const char *datetime)
+{
+ GTimeZone *default_tz;
+ GDateTime *gdatetime = NULL;
+ int ret = -1;
+
+ default_tz = g_time_zone_new_utc();
+ if (!default_tz) {
+ BT_LOGD("Failed to allocate timezone");
goto end;
}
- san_base = sanitize_trace_path(base);
- g_string_append_printf(path, "/%s", san_base->str);
+ gdatetime = g_date_time_new_from_iso8601(datetime, default_tz);
+ if (!gdatetime) {
+ BT_LOGD("Couldn't parse datetime as iso8601: date=\"%s\"", datetime);
+ goto end;
+ }
- while (g_file_test(path->str, G_FILE_TEST_IS_DIR)) {
- g_string_assign(path, output_dir_path);
- g_string_append_printf(path, "/%s%u", san_base->str, suffix);
- suffix++;
+ ret = 0;
+
+end:
+ if (default_tz) {
+ g_time_zone_unref(default_tz);
+ default_tz = NULL;
+ }
+
+ if (gdatetime) {
+ g_date_time_unref(gdatetime);
+ gdatetime = NULL;
}
+ return ret;
+}
+
+static
+int append_lttng_trace_path_ust_uid(GString *path, const bt_trace_class *tc)
+{
+ const bt_value *v;
+ int ret;
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "tracer_buffering_id");
+ if (!v || !bt_value_is_integer(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"tracer_buffering_id\"");
+ goto error;
+ }
+
+ g_string_append_printf(path, G_DIR_SEPARATOR_S "%" PRId64, bt_value_integer_get(v));
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "isa_length");
+ if (!v || !bt_value_is_integer(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"isa_length\"");
+ goto error;
+ }
+
+ g_string_append_printf(path, G_DIR_SEPARATOR_S "%" PRIu64 "-bit", bt_value_integer_get(v));
+
+ ret = 0;
+ goto end;
+
+error:
+ ret = -1;
+
end:
- if (san_base) {
- g_string_free(san_base, TRUE);
+ return ret;
+}
+
+static
+int append_lttng_trace_path_ust_pid(GString *path, const bt_trace_class *tc)
+{
+ const bt_value *v;
+ const char *datetime;
+ int ret;
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "procname");
+ if (!v || !bt_value_is_string(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"procname\"");
+ goto error;
+ }
+
+ g_string_append_printf(path, G_DIR_SEPARATOR_S "%s", bt_value_string_get(v));
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "vpid");
+ if (!v || !bt_value_is_integer(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"vpid\"");
+ goto error;
+ }
+
+ g_string_append_printf(path, "-%" PRId64, bt_value_integer_get(v));
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "vpid_datetime");
+ if (!v || !bt_value_is_string(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"vpid_datetime\"");
+ goto error;
+ }
+
+ datetime = bt_value_string_get(v);
+
+ if (lttng_validate_datetime(datetime)) {
+ goto error;
+ }
+
+ g_string_append_printf(path, "-%s", datetime);
+
+ ret = 0;
+ goto end;
+
+error:
+ ret = -1;
+
+end:
+ return ret;
+}
+
+/*
+ * Try to build a trace path based on environment values put in the trace
+ * environment by the LTTng tracer, starting with version 2.11.
+ */
+static
+GString *make_lttng_trace_path_rel(const struct fs_sink_trace *trace)
+{
+ const bt_trace_class *tc;
+ const bt_value *v;
+ const char *tracer_name, *domain, *datetime;
+ int64_t tracer_major, tracer_minor;
+ GString *path;
+
+ path = g_string_new(NULL);
+ if (!path) {
+ goto error;
+ }
+
+ tc = bt_trace_borrow_class_const(trace->ir_trace);
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "tracer_name");
+ if (!v || !bt_value_is_string(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"tracer_name\"");
+ goto error;
+ }
+
+ tracer_name = bt_value_string_get(v);
+
+ if (!g_str_equal(tracer_name, "lttng-ust")
+ && !g_str_equal(tracer_name, "lttng-modules")) {
+ BT_LOGD("Unrecognized tracer name: name=\"%s\"", tracer_name);
+ goto error;
}
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "tracer_major");
+ if (!v || !bt_value_is_integer(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"tracer_major\"");
+ goto error;
+ }
+
+ tracer_major = bt_value_integer_get(v);
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "tracer_minor");
+ if (!v || !bt_value_is_integer(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"tracer_minor\"");
+ goto error;
+ }
+
+ tracer_minor = bt_value_integer_get(v);
+
+ if (!(tracer_major >= 3 || (tracer_major == 2 && tracer_minor >= 11))) {
+ BT_LOGD("Unsupported LTTng version for automatic trace path: major=%" PRId64 ", minor=%" PRId64,
+ tracer_major, tracer_minor);
+ goto error;
+ }
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "hostname");
+ if (!v || !bt_value_is_string(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"tracer_hostname\"");
+ goto error;
+ }
+
+ g_string_assign(path, bt_value_string_get(v));
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "trace_name");
+ if (!v || !bt_value_is_string(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"trace_name\"");
+ goto error;
+ }
+
+ g_string_append_printf(path, G_DIR_SEPARATOR_S "%s", bt_value_string_get(v));
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "trace_creation_datetime");
+ if (!v || !bt_value_is_string(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"trace_creation_datetime\"");
+ goto error;
+ }
+
+ datetime = bt_value_string_get(v);
+
+ if (lttng_validate_datetime(datetime)) {
+ goto error;
+ }
+
+ g_string_append_printf(path, "-%s", datetime);
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "domain");
+ if (!v || !bt_value_is_string(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"domain\"");
+ goto error;
+ }
+
+ domain = bt_value_string_get(v);
+ g_string_append_printf(path, G_DIR_SEPARATOR_S "%s", domain);
+
+ if (g_str_equal(domain, "ust")) {
+ const char *tracer_buffering_scheme;
+
+ v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "tracer_buffering_scheme");
+ if (!v || !bt_value_is_string(v)) {
+ BT_LOGD_STR("Couldn't get environment value: name=\"tracer_buffering_scheme\"");
+ goto error;
+ }
+
+ tracer_buffering_scheme = bt_value_string_get(v);
+ g_string_append_printf(path, G_DIR_SEPARATOR_S "%s", tracer_buffering_scheme);
+
+ if (g_str_equal(tracer_buffering_scheme, "uid")) {
+ if (append_lttng_trace_path_ust_uid(path, tc)) {
+ goto error;
+ }
+ } else if (g_str_equal(tracer_buffering_scheme, "pid")){
+ if (append_lttng_trace_path_ust_pid(path, tc)) {
+ goto error;
+ }
+ } else {
+ /* Unknown buffering scheme. */
+ BT_LOGD("Unknown buffering scheme: tracer_buffering_scheme=\"%s\"", tracer_buffering_scheme);
+ goto error;
+ }
+ } else if (!g_str_equal(domain, "kernel")) {
+ /* Unknown domain. */
+ BT_LOGD("Unknown domain: domain=\"%s\"", domain);
+ goto error;
+ }
+
+ goto end;
+
+error:
+ if (path) {
+ g_string_free(path, TRUE);
+ path = NULL;
+ }
+
+end:
+ return path;
+}
+
+/* Build the relative output path for `trace`. */
+
+static
+GString *make_trace_path_rel(const struct fs_sink_trace *trace)
+{
+ GString *path = NULL;
+
+ if (trace->fs_sink->assume_single_trace) {
+ /* Use output directory directly */
+ path = g_string_new("");
+ goto end;
+ }
+
+ /* First, try to build a path using environment fields written by LTTng. */
+ path = make_lttng_trace_path_rel(trace);
+ if (path) {
+ goto end;
+ }
+
+ /* Otherwise, use the trace name, if available. */
+ const char *trace_name = bt_trace_get_name(trace->ir_trace);
+ if (trace_name) {
+ path = g_string_new(trace_name);
+ goto end;
+ }
+
+ /* Otherwise, use "trace". */
+ path = g_string_new("trace");
+
+end:
return path;
}
+/*
+ * Compute the trace output path for `trace`, rooted at `output_base_directory`.
+ */
+
+static
+GString *make_trace_path(const struct fs_sink_trace *trace, const char *output_base_directory)
+{
+ GString *rel_path = NULL;
+ GString *rel_path_san = NULL;
+ GString *full_path = NULL;
+ GString *unique_full_path = NULL;
+
+ rel_path = make_trace_path_rel(trace);
+ if (!rel_path) {
+ goto end;
+ }
+
+ rel_path_san = sanitize_trace_path(rel_path->str);
+ if (!rel_path_san) {
+ goto end;
+ }
+
+ full_path = g_string_new(NULL);
+ if (!full_path) {
+ goto end;
+ }
+
+ g_string_printf(full_path, "%s" G_DIR_SEPARATOR_S "%s",
+ output_base_directory, rel_path_san->str);
+
+ unique_full_path = make_unique_trace_path(full_path->str);
+
+end:
+ if (rel_path) {
+ g_string_free(rel_path, TRUE);
+ }
+
+ if (rel_path_san) {
+ g_string_free(rel_path_san, TRUE);
+ }
+
+ if (full_path) {
+ g_string_free(full_path, TRUE);
+ }
+
+ return unique_full_path;
+}
+
BT_HIDDEN
void fs_sink_trace_destroy(struct fs_sink_trace *trace)
{
{
int ret;
struct fs_sink_trace *trace = g_new0(struct fs_sink_trace, 1);
- const char *trace_name = bt_trace_get_name(ir_trace);
bt_trace_status trace_status;
if (!trace) {
goto end;
}
- if (!trace_name) {
- trace_name = "trace";
- }
-
trace->fs_sink = fs_sink;
trace->ir_trace = ir_trace;
trace->ir_trace_destruction_listener_id = UINT64_C(-1);
goto error;
}
- trace->path = make_unique_trace_path(fs_sink,
- fs_sink->output_dir_path->str, trace_name);
+ trace->path = make_trace_path(trace, fs_sink->output_dir_path->str);
BT_ASSERT(trace->path);
ret = g_mkdir_with_parents(trace->path->str, 0755);
if (ret) {
projects / babeltrace.git / commitdiff
