[babeltrace.git] / src / plugins / ctf / fs-sink / fs-sink-trace.c

/*
 * Copyright 2019 Philippe Proulx <pproulx@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#define BT_COMP_LOG_SELF_COMP (trace->fs_sink->self_comp)
#define BT_LOG_OUTPUT_LEVEL (trace->log_level)
#define BT_LOG_TAG "PLUGIN/SINK.CTF.FS/TRACE"
#include "plugins/comp-logging.h"

#include <babeltrace2/babeltrace.h>
#include <stdio.h>
#include <stdbool.h>
#include <glib.h>
#include "common/assert.h"
#include "ctfser/ctfser.h"

#include "translate-trace-ir-to-ctf-ir.h"
#include "translate-ctf-ir-to-tsdl.h"
#include "fs-sink.h"
#include "fs-sink-trace.h"
#include "fs-sink-stream.h"

/*
 * Sanitizes `path` so as to:
 *
 * * Replace `.` subdirectories with `_`.
 * * Replace `..` subdirectories with `__`.
 * * Remove trailing slashes.
 */
static
GString *sanitize_trace_path(const char *path)
{
	GString *san_path = g_string_new(NULL);
	const char *ch = path;
	bool dir_start = true;

	BT_ASSERT(san_path);
	BT_ASSERT(path);

	while (*ch != '\0') {
		switch (*ch) {
		case '/':
			/* Start of directory */
			dir_start = true;
			g_string_append_c(san_path, *ch);
			ch++;
			continue;
		case '.':
			if (dir_start) {
				switch (ch[1]) {
				case '\0':
				case '/':
					/* `.` -> `_` */
					g_string_append_c(san_path, '_');
					ch++;
					continue;
				case '.':
					switch (ch[2]) {
					case '\0':
					case '/':
						/* `..` -> `__` */
						g_string_append(san_path, "__");
						ch += 2;
						continue;
					default:
						break;
					}
				default:
					break;
				}
			}
		default:
			break;
		}

		/* Not a special character */
		g_string_append_c(san_path, *ch);
		ch++;
		dir_start = false;
	}

	/* Remove trailing slashes */
	while (san_path->len > 0 &&
			san_path->str[san_path->len - 1] == '/') {
		/* Remove trailing slash */
		g_string_set_size(san_path, san_path->len - 1);
	}

	if (san_path->len == 0) {
		/* Looks like there's nothing left: just use `trace` */
		g_string_assign(san_path, "trace");
	}

	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(const char *path)
{
	GString *unique_path;
	unsigned int suffix = 0;

	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 struct fs_sink_trace *trace,
		const char *datetime)
{
	GTimeVal tv;
	int ret = -1;

	/*
	 * We are using g_time_val_from_iso8601, as the safer/more modern
	 * alternative, g_date_time_new_from_iso8601, is only available in
	 * glib >= 2.56, and this is sufficient for our use case of validating
	 * the format.
	 */
	if (!g_time_val_from_iso8601(datetime, &tv)) {
		BT_COMP_LOGI("Couldn't parse datetime as ISO 8601: date=\"%s\"", datetime);
		goto end;
	}

	ret = 0;

end:
	return ret;
}

static
int append_lttng_trace_path_ust_uid(const struct fs_sink_trace *trace,
		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_signed_integer(v)) {
		BT_COMP_LOGI_STR("Couldn't get environment value: name=\"tracer_buffering_id\"");
		goto error;
	}

	g_string_append_printf(path, G_DIR_SEPARATOR_S "%" PRId64,
		bt_value_signed_integer_get(v));

	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "isa_length");
	if (!v || !bt_value_is_signed_integer(v)) {
		BT_COMP_LOGI_STR("Couldn't get environment value: name=\"isa_length\"");
		goto error;
	}

	g_string_append_printf(path, G_DIR_SEPARATOR_S "%" PRIu64 "-bit",
		bt_value_signed_integer_get(v));

	ret = 0;
	goto end;

error:
	ret = -1;

end:
	return ret;
}

static
int append_lttng_trace_path_ust_pid(const struct fs_sink_trace *trace,
		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_COMP_LOGI_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_signed_integer(v)) {
		BT_COMP_LOGI_STR("Couldn't get environment value: name=\"vpid\"");
		goto error;
	}

	g_string_append_printf(path, "-%" PRId64, bt_value_signed_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_COMP_LOGI_STR("Couldn't get environment value: name=\"vpid_datetime\"");
		goto error;
	}

	datetime = bt_value_string_get(v);

	if (lttng_validate_datetime(trace, 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_COMP_LOGI_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_COMP_LOGI("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_signed_integer(v)) {
		BT_COMP_LOGI_STR("Couldn't get environment value: name=\"tracer_major\"");
		goto error;
	}

	tracer_major = bt_value_signed_integer_get(v);

	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "tracer_minor");
	if (!v || !bt_value_is_signed_integer(v)) {
		BT_COMP_LOGI_STR("Couldn't get environment value: name=\"tracer_minor\"");
		goto error;
	}

	tracer_minor = bt_value_signed_integer_get(v);

	if (!(tracer_major >= 3 || (tracer_major == 2 && tracer_minor >= 11))) {
		BT_COMP_LOGI("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_COMP_LOGI_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_COMP_LOGI_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_COMP_LOGI_STR("Couldn't get environment value: name=\"trace_creation_datetime\"");
		goto error;
	}

	datetime = bt_value_string_get(v);

	if (lttng_validate_datetime(trace, 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_COMP_LOGI_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_COMP_LOGI_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(trace, path, tc)) {
				goto error;
			}
		} else if (g_str_equal(tracer_buffering_scheme, "pid")){
			if (append_lttng_trace_path_ust_pid(trace, path, tc)) {
				goto error;
			}
		} else {
			/* Unknown buffering scheme. */
			BT_COMP_LOGI("Unknown buffering scheme: tracer_buffering_scheme=\"%s\"", tracer_buffering_scheme);
			goto error;
		}
	} else if (!g_str_equal(domain, "kernel")) {
		/* Unknown domain. */
		BT_COMP_LOGI("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)
{
	GString *tsdl = NULL;
	FILE *fh = NULL;
	size_t len;

	if (!trace) {
		goto end;
	}

	if (trace->ir_trace_destruction_listener_id != UINT64_C(-1)) {
		/*
		 * Remove the destruction listener, otherwise it could
		 * be called in the future, and its private data is this
		 * CTF FS sink trace object which won't exist anymore.
		 */
		(void) bt_trace_remove_destruction_listener(trace->ir_trace,
			trace->ir_trace_destruction_listener_id);
		trace->ir_trace_destruction_listener_id = UINT64_C(-1);
	}

	if (trace->streams) {
		g_hash_table_destroy(trace->streams);
		trace->streams = NULL;
	}

	tsdl = g_string_new(NULL);
	BT_ASSERT(tsdl);
	translate_trace_class_ctf_ir_to_tsdl(trace->tc, tsdl);

	BT_ASSERT(trace->metadata_path);
	fh = fopen(trace->metadata_path->str, "wb");
	if (!fh) {
		BT_COMP_LOGF_ERRNO("In trace destruction listener: "
			"cannot open metadata file for writing: ",
			": path=\"%s\"", trace->metadata_path->str);
		abort();
	}

	len = fwrite(tsdl->str, sizeof(*tsdl->str), tsdl->len, fh);
	if (len != tsdl->len) {
		BT_COMP_LOGF_ERRNO("In trace destruction listener: "
			"cannot write metadata file: ",
			": path=\"%s\"", trace->metadata_path->str);
		abort();
	}

	if (!trace->fs_sink->quiet) {
		printf("Created CTF trace `%s`.\n", trace->path->str);
	}

	if (trace->path) {
		g_string_free(trace->path, TRUE);
		trace->path = NULL;
	}

	g_string_free(trace->metadata_path, TRUE);
	trace->metadata_path = NULL;

	fs_sink_ctf_trace_class_destroy(trace->tc);
	trace->tc = NULL;
	g_free(trace);

end:
	if (fh) {
		int ret = fclose(fh);

		if (ret != 0) {
			BT_COMP_LOGW_ERRNO("In trace destruction listener: "
				"cannot close metadata file: ",
				": path=\"%s\"", trace->metadata_path->str);
		}
	}

	if (tsdl) {
		g_string_free(tsdl, TRUE);
	}

	return;
}

static
void ir_trace_destruction_listener(const bt_trace *ir_trace, void *data)
{
	struct fs_sink_trace *trace = data;

	/*
	 * Prevent bt_trace_remove_destruction_listener() from being
	 * called in fs_sink_trace_destroy(), which is called by
	 * g_hash_table_remove() below.
	 */
	trace->ir_trace_destruction_listener_id = UINT64_C(-1);
	g_hash_table_remove(trace->fs_sink->traces, ir_trace);
}

BT_HIDDEN
struct fs_sink_trace *fs_sink_trace_create(struct fs_sink_comp *fs_sink,
		const bt_trace *ir_trace)
{
	int ret;
	struct fs_sink_trace *trace = g_new0(struct fs_sink_trace, 1);
	bt_trace_add_listener_status trace_status;

	if (!trace) {
		goto end;
	}

	trace->log_level = fs_sink->log_level;
	trace->fs_sink = fs_sink;
	trace->ir_trace = ir_trace;
	trace->ir_trace_destruction_listener_id = UINT64_C(-1);
	trace->tc = translate_trace_class_trace_ir_to_ctf_ir(
		fs_sink, bt_trace_borrow_class_const(ir_trace));
	if (!trace->tc) {
		goto error;
	}

	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) {
		BT_COMP_LOGE_ERRNO("Cannot create directories for trace directory",
			": path=\"%s\"", trace->path->str);
		goto error;
	}

	trace->metadata_path = g_string_new(trace->path->str);
	BT_ASSERT(trace->metadata_path);
	g_string_append(trace->metadata_path, "/metadata");
	trace->streams = g_hash_table_new_full(g_direct_hash, g_direct_equal,
		NULL, (GDestroyNotify) fs_sink_stream_destroy);
	BT_ASSERT(trace->streams);
	trace_status = bt_trace_add_destruction_listener(ir_trace,
		ir_trace_destruction_listener, trace,
		&trace->ir_trace_destruction_listener_id);
	if (trace_status) {
		goto error;
	}

	g_hash_table_insert(fs_sink->traces, (gpointer) ir_trace, trace);
	goto end;

error:
	fs_sink_trace_destroy(trace);
	trace = NULL;

end:
	return trace;
}
Commit	Line	Data
15fe47e0 PP	1	/*
	2	* Copyright 2019 Philippe Proulx <pproulx@efficios.com>
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a copy
	5	* of this software and associated documentation files (the "Software"), to deal
	6	* in the Software without restriction, including without limitation the rights
	7	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	8	* copies of the Software, and to permit persons to whom the Software is
	9	* furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	17	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	18	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	19	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	20	* SOFTWARE.
	21	*/
	22
aa1a7452	23	#define BT_COMP_LOG_SELF_COMP (trace->fs_sink->self_comp)
ffa3b2b3	24	#define BT_LOG_OUTPUT_LEVEL (trace->log_level)
350ad6c1	25	#define BT_LOG_TAG "PLUGIN/SINK.CTF.FS/TRACE"
aa1a7452	26	#include "plugins/comp-logging.h"
15fe47e0	27
3fadfbc0	28	#include <babeltrace2/babeltrace.h>
15fe47e0 PP	29	#include <stdio.h>
	30	#include <stdbool.h>
	31	#include <glib.h>
578e048b MJ	32	#include "common/assert.h"
578e048b MJ	33	#include "ctfser/ctfser.h"
15fe47e0 PP	34
	35	#include "translate-trace-ir-to-ctf-ir.h"
	36	#include "translate-ctf-ir-to-tsdl.h"
	37	#include "fs-sink.h"
	38	#include "fs-sink-trace.h"
	39	#include "fs-sink-stream.h"
	40
	41	/*
	42	* Sanitizes `path` so as to:
	43	*
	44	* * Replace `.` subdirectories with `_`.
	45	* * Replace `..` subdirectories with `__`.
	46	* * Remove trailing slashes.
	47	*/
	48	static
	49	GString sanitize_trace_path(const char path)
	50	{
	51	GString *san_path = g_string_new(NULL);
	52	const char *ch = path;
	53	bool dir_start = true;
	54
	55	BT_ASSERT(san_path);
	56	BT_ASSERT(path);
	57
	58	while (*ch != '\0') {
	59	switch (*ch) {
	60	case '/':
	61	/* Start of directory */
	62	dir_start = true;
	63	g_string_append_c(san_path, *ch);
	64	ch++;
	65	continue;
	66	case '.':
	67	if (dir_start) {
	68	switch (ch[1]) {
	69	case '\0':
	70	case '/':
	71	/* `.` -> `_` */
	72	g_string_append_c(san_path, '_');
	73	ch++;
	74	continue;
	75	case '.':
	76	switch (ch[2]) {
	77	case '\0':
	78	case '/':
	79	/* `..` -> `__` */
	80	g_string_append(san_path, "__");
	81	ch += 2;
	82	continue;
	83	default:
	84	break;
	85	}
	86	default:
	87	break;
	88	}
	89	}
	90	default:
	91	break;
	92	}
	93
	94	/* Not a special character */
	95	g_string_append_c(san_path, *ch);
	96	ch++;
	97	dir_start = false;
98	}
99
100	/* Remove trailing slashes */
101	while (san_path->len > 0 &&
102	san_path->str[san_path->len - 1] == '/') {
103	/* Remove trailing slash */
104	g_string_set_size(san_path, san_path->len - 1);
105	}
106
107	if (san_path->len == 0) {
108	/* Looks like there's nothing left: just use `trace` */
109	g_string_assign(san_path, "trace");
110	}
111
112	return san_path;
113	}
114
be38c486 SM	115	/*
	116	* Find a path based on `path` that doesn't exist yet. First, try `path`
	117	* itself, then try with incrementing suffixes.
	118	*/
	119
15fe47e0	120	static
be38c486	121	GString make_unique_trace_path(const char path)
15fe47e0	122	{
be38c486	123	GString *unique_path;
15fe47e0 PP	124	unsigned int suffix = 0;
15fe47e0 PP	125
be38c486 SM	126	unique_path = g_string_new(path);
	127
	128	while (g_file_test(unique_path->str, G_FILE_TEST_EXISTS)) {
	129	g_string_printf(unique_path, "%s-%u", path, suffix);
	130	suffix++;
	131	}
	132
	133	return unique_path;
	134	}
	135
	136	/*
	137	* Validate that the input string `datetime` is an ISO8601-compliant string (the
	138	* format used by LTTng in the metadata).
	139	*/
	140
	141	static
ffa3b2b3 PP	142	int lttng_validate_datetime(const struct fs_sink_trace *trace,
ffa3b2b3 PP	143	const char *datetime)
be38c486	144	{
5ec1bd5c	145	GTimeVal tv;
be38c486 SM	146	int ret = -1;
be38c486 SM	147
5ec1bd5c SM	148	/*
	149	* We are using g_time_val_from_iso8601, as the safer/more modern
	150	* alternative, g_date_time_new_from_iso8601, is only available in
	151	* glib >= 2.56, and this is sufficient for our use case of validating
	152	* the format.
	153	*/
	154	if (!g_time_val_from_iso8601(datetime, &tv)) {
aa1a7452	155	BT_COMP_LOGI("Couldn't parse datetime as ISO 8601: date=\"%s\"", datetime);
be38c486 SM	156	goto end;
be38c486 SM	157	}
15fe47e0	158
be38c486 SM	159	ret = 0;
	160
	161	end:
be38c486 SM	162	return ret;
	163	}
	164
	165	static
ffa3b2b3 PP	166	int append_lttng_trace_path_ust_uid(const struct fs_sink_trace *trace,
ffa3b2b3 PP	167	GString path, const bt_trace_class tc)
be38c486 SM	168	{
	169	const bt_value *v;
	170	int ret;
	171
	172	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "tracer_buffering_id");
fdd3a2da	173	if (!v \|\| !bt_value_is_signed_integer(v)) {
aa1a7452	174	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"tracer_buffering_id\"");
be38c486 SM	175	goto error;
	176	}
	177
fdd3a2da PP	178	g_string_append_printf(path, G_DIR_SEPARATOR_S "%" PRId64,
fdd3a2da PP	179	bt_value_signed_integer_get(v));
be38c486 SM	180
be38c486 SM	181	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "isa_length");
fdd3a2da	182	if (!v \|\| !bt_value_is_signed_integer(v)) {
aa1a7452	183	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"isa_length\"");
be38c486 SM	184	goto error;
	185	}
	186
fdd3a2da PP	187	g_string_append_printf(path, G_DIR_SEPARATOR_S "%" PRIu64 "-bit",
fdd3a2da PP	188	bt_value_signed_integer_get(v));
be38c486 SM	189
	190	ret = 0;
	191	goto end;
	192
	193	error:
	194	ret = -1;
	195
15fe47e0	196	end:
be38c486 SM	197	return ret;
	198	}
	199
	200	static
ffa3b2b3 PP	201	int append_lttng_trace_path_ust_pid(const struct fs_sink_trace *trace,
ffa3b2b3 PP	202	GString path, const bt_trace_class tc)
be38c486 SM	203	{
	204	const bt_value *v;
	205	const char *datetime;
	206	int ret;
	207
	208	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "procname");
	209	if (!v \|\| !bt_value_is_string(v)) {
aa1a7452	210	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"procname\"");
be38c486 SM	211	goto error;
	212	}
	213
	214	g_string_append_printf(path, G_DIR_SEPARATOR_S "%s", bt_value_string_get(v));
	215
	216	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "vpid");
fdd3a2da	217	if (!v \|\| !bt_value_is_signed_integer(v)) {
aa1a7452	218	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"vpid\"");
be38c486 SM	219	goto error;
	220	}
	221
fdd3a2da	222	g_string_append_printf(path, "-%" PRId64, bt_value_signed_integer_get(v));
be38c486 SM	223
	224	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "vpid_datetime");
	225	if (!v \|\| !bt_value_is_string(v)) {
aa1a7452	226	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"vpid_datetime\"");
be38c486 SM	227	goto error;
	228	}
	229
	230	datetime = bt_value_string_get(v);
	231
ffa3b2b3	232	if (lttng_validate_datetime(trace, datetime)) {
be38c486 SM	233	goto error;
	234	}
	235
	236	g_string_append_printf(path, "-%s", datetime);
	237
	238	ret = 0;
	239	goto end;
	240
	241	error:
	242	ret = -1;
	243
	244	end:
	245	return ret;
	246	}
	247
	248	/*
	249	* Try to build a trace path based on environment values put in the trace
	250	* environment by the LTTng tracer, starting with version 2.11.
	251	*/
	252	static
	253	GString make_lttng_trace_path_rel(const struct fs_sink_trace trace)
	254	{
	255	const bt_trace_class *tc;
	256	const bt_value *v;
	257	const char tracer_name, domain, *datetime;
	258	int64_t tracer_major, tracer_minor;
	259	GString *path;
	260
	261	path = g_string_new(NULL);
	262	if (!path) {
	263	goto error;
	264	}
	265
	266	tc = bt_trace_borrow_class_const(trace->ir_trace);
	267
	268	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "tracer_name");
	269	if (!v \|\| !bt_value_is_string(v)) {
aa1a7452	270	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"tracer_name\"");
be38c486 SM	271	goto error;
	272	}
	273
	274	tracer_name = bt_value_string_get(v);
	275
	276	if (!g_str_equal(tracer_name, "lttng-ust")
	277	&& !g_str_equal(tracer_name, "lttng-modules")) {
aa1a7452	278	BT_COMP_LOGI("Unrecognized tracer name: name=\"%s\"", tracer_name);
be38c486	279	goto error;
15fe47e0 PP	280	}
15fe47e0 PP	281
be38c486	282	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "tracer_major");
fdd3a2da	283	if (!v \|\| !bt_value_is_signed_integer(v)) {
aa1a7452	284	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"tracer_major\"");
be38c486 SM	285	goto error;
	286	}
	287
fdd3a2da	288	tracer_major = bt_value_signed_integer_get(v);
be38c486 SM	289
be38c486 SM	290	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "tracer_minor");
fdd3a2da	291	if (!v \|\| !bt_value_is_signed_integer(v)) {
aa1a7452	292	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"tracer_minor\"");
be38c486 SM	293	goto error;
	294	}
	295
fdd3a2da	296	tracer_minor = bt_value_signed_integer_get(v);
be38c486 SM	297
be38c486 SM	298	if (!(tracer_major >= 3 \|\| (tracer_major == 2 && tracer_minor >= 11))) {
aa1a7452	299	BT_COMP_LOGI("Unsupported LTTng version for automatic trace path: major=%" PRId64 ", minor=%" PRId64,
be38c486 SM	300	tracer_major, tracer_minor);
	301	goto error;
	302	}
	303
	304	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "hostname");
	305	if (!v \|\| !bt_value_is_string(v)) {
aa1a7452	306	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"tracer_hostname\"");
be38c486 SM	307	goto error;
	308	}
	309
	310	g_string_assign(path, bt_value_string_get(v));
	311
	312	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "trace_name");
	313	if (!v \|\| !bt_value_is_string(v)) {
aa1a7452	314	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"trace_name\"");
be38c486 SM	315	goto error;
	316	}
	317
	318	g_string_append_printf(path, G_DIR_SEPARATOR_S "%s", bt_value_string_get(v));
	319
	320	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "trace_creation_datetime");
	321	if (!v \|\| !bt_value_is_string(v)) {
aa1a7452	322	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"trace_creation_datetime\"");
be38c486 SM	323	goto error;
	324	}
	325
	326	datetime = bt_value_string_get(v);
	327
ffa3b2b3	328	if (lttng_validate_datetime(trace, datetime)) {
be38c486 SM	329	goto error;
	330	}
	331
	332	g_string_append_printf(path, "-%s", datetime);
	333
	334	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "domain");
	335	if (!v \|\| !bt_value_is_string(v)) {
aa1a7452	336	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"domain\"");
be38c486 SM	337	goto error;
	338	}
	339
	340	domain = bt_value_string_get(v);
	341	g_string_append_printf(path, G_DIR_SEPARATOR_S "%s", domain);
	342
	343	if (g_str_equal(domain, "ust")) {
	344	const char *tracer_buffering_scheme;
	345
	346	v = bt_trace_class_borrow_environment_entry_value_by_name_const(tc, "tracer_buffering_scheme");
	347	if (!v \|\| !bt_value_is_string(v)) {
aa1a7452	348	BT_COMP_LOGI_STR("Couldn't get environment value: name=\"tracer_buffering_scheme\"");
be38c486 SM	349	goto error;
	350	}
	351
	352	tracer_buffering_scheme = bt_value_string_get(v);
	353	g_string_append_printf(path, G_DIR_SEPARATOR_S "%s", tracer_buffering_scheme);
	354
	355	if (g_str_equal(tracer_buffering_scheme, "uid")) {
ffa3b2b3	356	if (append_lttng_trace_path_ust_uid(trace, path, tc)) {
be38c486 SM	357	goto error;
	358	}
	359	} else if (g_str_equal(tracer_buffering_scheme, "pid")){
ffa3b2b3	360	if (append_lttng_trace_path_ust_pid(trace, path, tc)) {
be38c486 SM	361	goto error;
	362	}
	363	} else {
	364	/* Unknown buffering scheme. */
aa1a7452	365	BT_COMP_LOGI("Unknown buffering scheme: tracer_buffering_scheme=\"%s\"", tracer_buffering_scheme);
be38c486 SM	366	goto error;
	367	}
	368	} else if (!g_str_equal(domain, "kernel")) {
	369	/* Unknown domain. */
aa1a7452	370	BT_COMP_LOGI("Unknown domain: domain=\"%s\"", domain);
be38c486 SM	371	goto error;
	372	}
	373
	374	goto end;
	375
	376	error:
	377	if (path) {
	378	g_string_free(path, TRUE);
	379	path = NULL;
	380	}
	381
	382	end:
	383	return path;
	384	}
	385
	386	/* Build the relative output path for `trace`. */
	387
	388	static
	389	GString make_trace_path_rel(const struct fs_sink_trace trace)
	390	{
	391	GString *path = NULL;
	392
	393	if (trace->fs_sink->assume_single_trace) {
	394	/* Use output directory directly */
	395	path = g_string_new("");
	396	goto end;
	397	}
	398
	399	/* First, try to build a path using environment fields written by LTTng. */
	400	path = make_lttng_trace_path_rel(trace);
	401	if (path) {
	402	goto end;
	403	}
	404
	405	/* Otherwise, use the trace name, if available. */
	406	const char *trace_name = bt_trace_get_name(trace->ir_trace);
	407	if (trace_name) {
	408	path = g_string_new(trace_name);
	409	goto end;
	410	}
	411
	412	/* Otherwise, use "trace". */
	413	path = g_string_new("trace");
	414
	415	end:
15fe47e0 PP	416	return path;
	417	}
	418
be38c486 SM	419	/*
	420	* Compute the trace output path for `trace`, rooted at `output_base_directory`.
	421	*/
	422
	423	static
	424	GString make_trace_path(const struct fs_sink_trace trace, const char *output_base_directory)
	425	{
	426	GString *rel_path = NULL;
	427	GString *rel_path_san = NULL;
	428	GString *full_path = NULL;
	429	GString *unique_full_path = NULL;
	430
	431	rel_path = make_trace_path_rel(trace);
	432	if (!rel_path) {
	433	goto end;
	434	}
	435
	436	rel_path_san = sanitize_trace_path(rel_path->str);
	437	if (!rel_path_san) {
	438	goto end;
	439	}
	440
	441	full_path = g_string_new(NULL);
	442	if (!full_path) {
	443	goto end;
	444	}
	445
	446	g_string_printf(full_path, "%s" G_DIR_SEPARATOR_S "%s",
	447	output_base_directory, rel_path_san->str);
	448
	449	unique_full_path = make_unique_trace_path(full_path->str);
	450
	451	end:
	452	if (rel_path) {
	453	g_string_free(rel_path, TRUE);
	454	}
	455
	456	if (rel_path_san) {
	457	g_string_free(rel_path_san, TRUE);
	458	}
	459
	460	if (full_path) {
	461	g_string_free(full_path, TRUE);
	462	}
	463
	464	return unique_full_path;
	465	}
	466
15fe47e0 PP	467	BT_HIDDEN
	468	void fs_sink_trace_destroy(struct fs_sink_trace *trace)
	469	{
	470	GString *tsdl = NULL;
	471	FILE *fh = NULL;
	472	size_t len;
	473
	474	if (!trace) {
	475	goto end;
	476	}
	477
	478	if (trace->ir_trace_destruction_listener_id != UINT64_C(-1)) {
	479	/*
	480	* Remove the destruction listener, otherwise it could
	481	* be called in the future, and its private data is this
	482	* CTF FS sink trace object which won't exist anymore.
	483	*/
	484	(void) bt_trace_remove_destruction_listener(trace->ir_trace,
	485	trace->ir_trace_destruction_listener_id);
	486	trace->ir_trace_destruction_listener_id = UINT64_C(-1);
	487	}
	488
	489	if (trace->streams) {
	490	g_hash_table_destroy(trace->streams);
	491	trace->streams = NULL;
	492	}
	493
	494	tsdl = g_string_new(NULL);
	495	BT_ASSERT(tsdl);
	496	translate_trace_class_ctf_ir_to_tsdl(trace->tc, tsdl);
20078f92 FD	497
20078f92 FD	498	BT_ASSERT(trace->metadata_path);
15fe47e0 PP	499	fh = fopen(trace->metadata_path->str, "wb");
15fe47e0 PP	500	if (!fh) {
aa1a7452	501	BT_COMP_LOGF_ERRNO("In trace destruction listener: "
15fe47e0 PP	502	"cannot open metadata file for writing: ",
	503	": path=\"%s\"", trace->metadata_path->str);
	504	abort();
	505	}
	506
	507	len = fwrite(tsdl->str, sizeof(*tsdl->str), tsdl->len, fh);
	508	if (len != tsdl->len) {
aa1a7452	509	BT_COMP_LOGF_ERRNO("In trace destruction listener: "
15fe47e0 PP	510	"cannot write metadata file: ",
	511	": path=\"%s\"", trace->metadata_path->str);
	512	abort();
	513	}
	514
	515	if (!trace->fs_sink->quiet) {
	516	printf("Created CTF trace `%s`.\n", trace->path->str);
	517	}
	518
	519	if (trace->path) {
	520	g_string_free(trace->path, TRUE);
	521	trace->path = NULL;
	522	}
	523
20078f92 FD	524	g_string_free(trace->metadata_path, TRUE);
20078f92 FD	525	trace->metadata_path = NULL;
15fe47e0 PP	526
	527	fs_sink_ctf_trace_class_destroy(trace->tc);
	528	trace->tc = NULL;
	529	g_free(trace);
	530
	531	end:
	532	if (fh) {
	533	int ret = fclose(fh);
	534
	535	if (ret != 0) {
aa1a7452	536	BT_COMP_LOGW_ERRNO("In trace destruction listener: "
15fe47e0 PP	537	"cannot close metadata file: ",
	538	": path=\"%s\"", trace->metadata_path->str);
	539	}
	540	}
	541
	542	if (tsdl) {
	543	g_string_free(tsdl, TRUE);
	544	}
	545
	546	return;
	547	}
	548
	549	static
	550	void ir_trace_destruction_listener(const bt_trace ir_trace, void data)
	551	{
	552	struct fs_sink_trace *trace = data;
	553
	554	/*
	555	* Prevent bt_trace_remove_destruction_listener() from being
	556	* called in fs_sink_trace_destroy(), which is called by
	557	* g_hash_table_remove() below.
	558	*/
	559	trace->ir_trace_destruction_listener_id = UINT64_C(-1);
	560	g_hash_table_remove(trace->fs_sink->traces, ir_trace);
	561	}
	562
	563	BT_HIDDEN
	564	struct fs_sink_trace fs_sink_trace_create(struct fs_sink_comp fs_sink,
	565	const bt_trace *ir_trace)
	566	{
	567	int ret;
	568	struct fs_sink_trace *trace = g_new0(struct fs_sink_trace, 1);
d24d5663	569	bt_trace_add_listener_status trace_status;
15fe47e0 PP	570
	571	if (!trace) {
	572	goto end;
	573	}
	574
ffa3b2b3	575	trace->log_level = fs_sink->log_level;
15fe47e0 PP	576	trace->fs_sink = fs_sink;
	577	trace->ir_trace = ir_trace;
	578	trace->ir_trace_destruction_listener_id = UINT64_C(-1);
	579	trace->tc = translate_trace_class_trace_ir_to_ctf_ir(
aa1a7452	580	fs_sink, bt_trace_borrow_class_const(ir_trace));
15fe47e0 PP	581	if (!trace->tc) {
	582	goto error;
	583	}
	584
be38c486	585	trace->path = make_trace_path(trace, fs_sink->output_dir_path->str);
15fe47e0 PP	586	BT_ASSERT(trace->path);
	587	ret = g_mkdir_with_parents(trace->path->str, 0755);
	588	if (ret) {
aa1a7452	589	BT_COMP_LOGE_ERRNO("Cannot create directories for trace directory",
15fe47e0 PP	590	": path=\"%s\"", trace->path->str);
	591	goto error;
	592	}
	593
	594	trace->metadata_path = g_string_new(trace->path->str);
	595	BT_ASSERT(trace->metadata_path);
	596	g_string_append(trace->metadata_path, "/metadata");
	597	trace->streams = g_hash_table_new_full(g_direct_hash, g_direct_equal,
	598	NULL, (GDestroyNotify) fs_sink_stream_destroy);
	599	BT_ASSERT(trace->streams);
	600	trace_status = bt_trace_add_destruction_listener(ir_trace,
	601	ir_trace_destruction_listener, trace,
	602	&trace->ir_trace_destruction_listener_id);
	603	if (trace_status) {
	604	goto error;
	605	}
	606
	607	g_hash_table_insert(fs_sink->traces, (gpointer) ir_trace, trace);
	608	goto end;
	609
	610	error:
	611	fs_sink_trace_destroy(trace);
	612	trace = NULL;
	613
	614	end:
	615	return trace;
	616	}