/*
- * Copyright (C) 2012 - Julien Desfossez <jdesfossez@efficios.com>
- * David Goulet <dgoulet@efficios.com>
- * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
- * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2012 Julien Desfossez <jdesfossez@efficios.com>
+ * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@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.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * 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 <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
+#include <sys/resource.h>
#include <inttypes.h>
#include <urcu/futex.h>
#include <urcu/uatomic.h>
+#include <urcu/rculist.h>
#include <unistd.h>
#include <fcntl.h>
+#include <strings.h>
+#include <ctype.h>
#include <lttng/lttng.h>
#include <common/common.h>
#include <common/config/session-config.h>
#include <common/dynamic-buffer.h>
#include <common/buffer-view.h>
-#include <urcu/rculist.h>
+#include <common/string-utils/format.h>
+#include <common/fd-tracker/fd-tracker.h>
+#include <common/fd-tracker/utils.h>
+#include "backward-compatibility-group-by.h"
#include "cmd.h"
+#include "connection.h"
#include "ctf-trace.h"
+#include "health-relayd.h"
#include "index.h"
-#include "utils.h"
-#include "lttng-relayd.h"
#include "live.h"
-#include "health-relayd.h"
-#include "testpoint.h"
-#include "viewer-stream.h"
+#include "lttng-relayd.h"
#include "session.h"
+#include "sessiond-trace-chunks.h"
#include "stream.h"
-#include "connection.h"
-#include "tracefile-array.h"
#include "tcp_keep_alive.h"
-#include "sessiond-trace-chunks.h"
+#include "testpoint.h"
+#include "tracefile-array.h"
+#include "utils.h"
+#include "version.h"
+#include "viewer-stream.h"
static const char *help_msg =
#ifdef LTTNG_EMBED_HELP
};
/* command line options */
-char *opt_output_path;
-static int opt_daemon, opt_background;
+char *opt_output_path, *opt_working_directory;
+static int opt_daemon, opt_background, opt_print_version, opt_allow_clear = 1;
+enum relay_group_output_by opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_UNKNOWN;
/*
* We need to wait for listener and live listener threads, as well as
/* Size of receive buffer. */
#define RECV_DATA_BUFFER_SIZE 65536
-#define FILE_COPY_BUFFER_SIZE 65536
static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */
static pid_t child_ppid; /* Internal parent PID use with daemonize. */
*/
static struct relay_conn_queue relay_conn_queue;
+/* Cap of file desriptors to be in simultaneous use by the relay daemon. */
+static unsigned int lttng_opt_fd_pool_size = -1;
+
/* Global relay stream hash table. */
struct lttng_ht *relay_streams_ht;
struct sessiond_trace_chunk_registry *sessiond_trace_chunk_registry;
+/* Global fd tracker. */
+struct fd_tracker *the_fd_tracker;
+
static struct option long_options[] = {
{ "control-port", 1, 0, 'C', },
{ "data-port", 1, 0, 'D', },
{ "daemonize", 0, 0, 'd', },
{ "background", 0, 0, 'b', },
{ "group", 1, 0, 'g', },
+ { "fd-pool-size", 1, 0, '\0', },
{ "help", 0, 0, 'h', },
{ "output", 1, 0, 'o', },
{ "verbose", 0, 0, 'v', },
{ "config", 1, 0, 'f' },
{ "version", 0, 0, 'V' },
+ { "working-directory", 1, 0, 'w', },
+ { "group-output-by-session", 0, 0, 's', },
+ { "group-output-by-host", 0, 0, 'p', },
+ { "disallow-clear", 0, 0, 'x' },
{ NULL, 0, 0, 0, },
};
static const char *config_ignore_options[] = { "help", "config", "version" };
+static void print_version(void) {
+ fprintf(stdout, "%s\n", VERSION);
+}
+
+static void relayd_config_log(void)
+{
+ DBG("LTTng-relayd " VERSION " - " VERSION_NAME "%s%s",
+ GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION,
+ EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " EXTRA_VERSION_NAME);
+ if (EXTRA_VERSION_DESCRIPTION[0] != '\0') {
+ DBG("LTTng-relayd extra version description:\n\t" EXTRA_VERSION_DESCRIPTION "\n");
+ }
+ if (EXTRA_VERSION_PATCHES[0] != '\0') {
+ DBG("LTTng-relayd extra patches:\n\t" EXTRA_VERSION_PATCHES "\n");
+ }
+}
+
/*
* Take an option from the getopt output and set it in the right variable to be
* used later.
switch (opt) {
case 0:
- fprintf(stderr, "option %s", optname);
- if (arg) {
- fprintf(stderr, " with arg %s\n", arg);
+ if (!strcmp(optname, "fd-pool-size")) {
+ unsigned long v;
+
+ errno = 0;
+ v = strtoul(arg, NULL, 0);
+ if (errno != 0 || !isdigit((unsigned char) arg[0])) {
+ ERR("Wrong value in --fd-pool-size parameter: %s", arg);
+ ret = -1;
+ goto end;
+ }
+ if (v >= UINT_MAX) {
+ ERR("File descriptor cap overflow in --fd-pool-size parameter: %s", arg);
+ ret = -1;
+ goto end;
+ }
+ lttng_opt_fd_pool_size = (unsigned int) v;
+ } else {
+ fprintf(stderr, "unknown option %s", optname);
+ if (arg) {
+ fprintf(stderr, " with arg %s\n", arg);
+ }
}
break;
case 'C':
}
exit(EXIT_FAILURE);
case 'V':
- fprintf(stdout, "%s\n", VERSION);
- exit(EXIT_SUCCESS);
+ opt_print_version = 1;
+ break;
case 'o':
if (lttng_is_setuid_setgid()) {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
}
}
break;
+ case 'w':
+ if (lttng_is_setuid_setgid()) {
+ WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
+ "-w, --working-directory");
+ } else {
+ ret = asprintf(&opt_working_directory, "%s", arg);
+ if (ret < 0) {
+ ret = -errno;
+ PERROR("asprintf opt_working_directory");
+ goto end;
+ }
+ }
+ break;
+
case 'v':
/* Verbose level can increase using multiple -v */
if (arg) {
}
}
break;
+ case 's':
+ if (opt_group_output_by != RELAYD_GROUP_OUTPUT_BY_UNKNOWN) {
+ ERR("Cannot set --group-output-by-session, another --group-output-by argument is present");
+ exit(EXIT_FAILURE);
+ }
+ opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_SESSION;
+ break;
+ case 'p':
+ if (opt_group_output_by != RELAYD_GROUP_OUTPUT_BY_UNKNOWN) {
+ ERR("Cannot set --group-output-by-host, another --group-output-by argument is present");
+ exit(EXIT_FAILURE);
+ }
+ opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_HOST;
+ break;
+ case 'x':
+ /* Disallow clear */
+ opt_allow_clear = 0;
+ break;
default:
/* Unknown option or other error.
* Error is printed by getopt, just return */
return ret;
}
+static int parse_env_options(void)
+{
+ int ret = 0;
+ char *value = NULL;
+
+ value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_WORKING_DIRECTORY_ENV);
+ if (value) {
+ opt_working_directory = strdup(value);
+ if (!opt_working_directory) {
+ ERR("Failed to allocate working directory string (\"%s\")",
+ value);
+ ret = -1;
+ }
+ }
+ return ret;
+}
+
+static int set_fd_pool_size(void)
+{
+ int ret = 0;
+ struct rlimit rlimit;
+
+ ret = getrlimit(RLIMIT_NOFILE, &rlimit);
+ if (ret) {
+ PERROR("Failed to get file descriptor limit");
+ ret = -1;
+ goto end;
+ }
+
+ DBG("File descriptor count limits are %" PRIu64 " (soft) and %" PRIu64 " (hard)",
+ (uint64_t) rlimit.rlim_cur,
+ (uint64_t) rlimit.rlim_max);
+ if (lttng_opt_fd_pool_size == -1) {
+ /* Use default value (soft limit - reserve). */
+ if (rlimit.rlim_cur < DEFAULT_RELAYD_MIN_FD_POOL_SIZE) {
+ ERR("The process' file number limit is too low (%" PRIu64 "). The process' file number limit must be set to at least %i.",
+ (uint64_t) rlimit.rlim_cur, DEFAULT_RELAYD_MIN_FD_POOL_SIZE);
+ ret = -1;
+ goto end;
+ }
+ lttng_opt_fd_pool_size = rlimit.rlim_cur -
+ DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE;
+ goto end;
+ }
+
+ if (lttng_opt_fd_pool_size < DEFAULT_RELAYD_MIN_FD_POOL_SIZE) {
+ ERR("File descriptor pool size must be set to at least %d",
+ DEFAULT_RELAYD_MIN_FD_POOL_SIZE);
+ ret = -1;
+ goto end;
+ }
+
+ if (lttng_opt_fd_pool_size > rlimit.rlim_cur) {
+ ERR("File descriptor pool size argument (%u) exceeds the process' soft limit (%" PRIu64 ").",
+ lttng_opt_fd_pool_size, (uint64_t) rlimit.rlim_cur);
+ ret = -1;
+ goto end;
+ }
+
+ DBG("File descriptor pool size argument (%u) adjusted to %u to accommodates transient fd uses",
+ lttng_opt_fd_pool_size,
+ lttng_opt_fd_pool_size - DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE);
+ lttng_opt_fd_pool_size -= DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE;
+end:
+ return ret;
+}
+
static int set_options(int argc, char **argv)
{
int c, ret = 0, option_index = 0, retval = 0;
goto exit;
}
}
+ ret = set_fd_pool_size();
+ if (ret) {
+ retval = -1;
+ goto exit;
+ }
+
+ if (opt_group_output_by == RELAYD_GROUP_OUTPUT_BY_UNKNOWN) {
+ opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_HOST;
+ }
+ if (opt_allow_clear) {
+ /* Check if env variable exists. */
+ const char *value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV);
+ if (value) {
+ ret = config_parse_value(value);
+ if (ret < 0) {
+ ERR("Invalid value for %s specified", DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV);
+ retval = -1;
+ goto exit;
+ }
+ opt_allow_clear = !ret;
+ }
+ }
exit:
free(optstring);
static void print_global_objects(void)
{
- rcu_register_thread();
-
print_viewer_streams();
print_relay_streams();
print_sessions();
+}
- rcu_unregister_thread();
+static int noop_close(void *data, int *fds)
+{
+ return 0;
+}
+
+static void untrack_stdio(void)
+{
+ int fds[] = { fileno(stdout), fileno(stderr) };
+
+ /*
+ * noop_close is used since we don't really want to close
+ * the stdio output fds; we merely want to stop tracking them.
+ */
+ (void) fd_tracker_close_unsuspendable_fd(the_fd_tracker,
+ fds, 2, noop_close, NULL);
}
/*
if (sessions_ht)
lttng_ht_destroy(sessions_ht);
- /* free the dynamically allocated opt_output_path */
free(opt_output_path);
+ free(opt_working_directory);
+ if (health_relayd) {
+ health_app_destroy(health_relayd);
+ }
/* Close thread quit pipes */
- utils_close_pipe(thread_quit_pipe);
+ if (health_quit_pipe[0] != -1) {
+ (void) fd_tracker_util_pipe_close(
+ the_fd_tracker, health_quit_pipe);
+ }
+ if (thread_quit_pipe[0] != -1) {
+ (void) fd_tracker_util_pipe_close(
+ the_fd_tracker, thread_quit_pipe);
+ }
+ if (sessiond_trace_chunk_registry) {
+ sessiond_trace_chunk_registry_destroy(
+ sessiond_trace_chunk_registry);
+ }
+ if (the_fd_tracker) {
+ untrack_stdio();
+ /*
+ * fd_tracker_destroy() will log the contents of the fd-tracker
+ * if a leak is detected.
+ */
+ fd_tracker_destroy(the_fd_tracker);
+ }
uri_free(control_uri);
uri_free(data_uri);
*/
static int init_thread_quit_pipe(void)
{
- int ret;
-
- ret = utils_create_pipe_cloexec(thread_quit_pipe);
+ return fd_tracker_util_pipe_open_cloexec(
+ the_fd_tracker, "Quit pipe", thread_quit_pipe);
+}
- return ret;
+/*
+ * Init health quit pipe.
+ *
+ * Return -1 on error or 0 if all pipes are created.
+ */
+static int init_health_quit_pipe(void)
+{
+ return fd_tracker_util_pipe_open_cloexec(the_fd_tracker,
+ "Health quit pipe", health_quit_pipe);
}
/*
* Create a poll set with O_CLOEXEC and add the thread quit pipe to the set.
*/
-static int create_thread_poll_set(struct lttng_poll_event *events, int size)
+static int create_named_thread_poll_set(struct lttng_poll_event *events,
+ int size, const char *name)
{
int ret;
goto error;
}
- ret = lttng_poll_create(events, size, LTTNG_CLOEXEC);
- if (ret < 0) {
+ ret = fd_tracker_util_poll_create(the_fd_tracker,
+ name, events, 1, LTTNG_CLOEXEC);
+ if (ret) {
+ PERROR("Failed to create \"%s\" poll file descriptor", name);
goto error;
}
return 0;
}
+static int create_sock(void *data, int *out_fd)
+{
+ int ret;
+ struct lttcomm_sock *sock = data;
+
+ ret = lttcomm_create_sock(sock);
+ if (ret < 0) {
+ goto end;
+ }
+
+ *out_fd = sock->fd;
+end:
+ return ret;
+}
+
+static int close_sock(void *data, int *in_fd)
+{
+ struct lttcomm_sock *sock = data;
+
+ return sock->ops->close(sock);
+}
+
+static int accept_sock(void *data, int *out_fd)
+{
+ int ret = 0;
+ /* Socks is an array of in_sock, out_sock. */
+ struct lttcomm_sock **socks = data;
+ struct lttcomm_sock *in_sock = socks[0];
+
+ socks[1] = in_sock->ops->accept(in_sock);
+ if (!socks[1]) {
+ ret = -1;
+ goto end;
+ }
+ *out_fd = socks[1]->fd;
+end:
+ return ret;
+}
+
/*
* Create and init socket from uri.
*/
-static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri)
+static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri,
+ const char *name)
{
- int ret;
+ int ret, sock_fd;
struct lttcomm_sock *sock = NULL;
+ char uri_str[PATH_MAX];
+ char *formated_name = NULL;
sock = lttcomm_alloc_sock_from_uri(uri);
if (sock == NULL) {
goto error;
}
- ret = lttcomm_create_sock(sock);
- if (ret < 0) {
+ /*
+ * Don't fail to create the socket if the name can't be built as it is
+ * only used for debugging purposes.
+ */
+ ret = uri_to_str_url(uri, uri_str, sizeof(uri_str));
+ uri_str[sizeof(uri_str) - 1] = '\0';
+ if (ret >= 0) {
+ ret = asprintf(&formated_name, "%s socket @ %s", name,
+ uri_str);
+ if (ret < 0) {
+ formated_name = NULL;
+ }
+ }
+
+ ret = fd_tracker_open_unsuspendable_fd(the_fd_tracker, &sock_fd,
+ (const char **) (formated_name ? &formated_name : NULL),
+ 1, create_sock, sock);
+ if (ret) {
+ PERROR("Failed to open \"%s\" relay socket",
+ formated_name ?: "Unknown");
goto error;
}
- DBG("Listening on sock %d", sock->fd);
+ DBG("Listening on %s socket %d", name, sock->fd);
ret = sock->ops->bind(sock);
if (ret < 0) {
}
+ free(formated_name);
return sock;
error:
if (sock) {
lttcomm_destroy_sock(sock);
}
+ free(formated_name);
return NULL;
}
+static
+struct lttcomm_sock *accept_relayd_sock(struct lttcomm_sock *listening_sock,
+ const char *name)
+{
+ int out_fd, ret;
+ struct lttcomm_sock *socks[2] = { listening_sock, NULL };
+ struct lttcomm_sock *new_sock = NULL;
+
+ ret = fd_tracker_open_unsuspendable_fd(
+ the_fd_tracker, &out_fd,
+ (const char **) &name,
+ 1, accept_sock, &socks);
+ if (ret) {
+ goto end;
+ }
+ new_sock = socks[1];
+ DBG("%s accepted, socket %d", name, new_sock->fd);
+end:
+ return new_sock;
+}
+
/*
* This thread manages the listening for new connections on the network
*/
DBG("[thread] Relay listener started");
+ rcu_register_thread();
health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER);
health_code_update();
- control_sock = relay_socket_create(control_uri);
+ control_sock = relay_socket_create(control_uri, "Control listener");
if (!control_sock) {
goto error_sock_control;
}
- data_sock = relay_socket_create(data_uri);
+ data_sock = relay_socket_create(data_uri, "Data listener");
if (!data_sock) {
goto error_sock_relay;
}
* Pass 3 as size here for the thread quit pipe, control and
* data socket.
*/
- ret = create_thread_poll_set(&events, 3);
+ ret = create_named_thread_poll_set(&events, 3, "Listener thread epoll");
if (ret < 0) {
goto error_create_poll;
}
*/
int val = 1;
struct relay_connection *new_conn;
- struct lttcomm_sock *newsock;
+ struct lttcomm_sock *newsock = NULL;
enum connection_type type;
if (pollfd == data_sock->fd) {
type = RELAY_DATA;
- newsock = data_sock->ops->accept(data_sock);
- DBG("Relay data connection accepted, socket %d",
- newsock->fd);
+ newsock = accept_relayd_sock(data_sock,
+ "Data socket to relayd");
} else {
assert(pollfd == control_sock->fd);
type = RELAY_CONTROL;
- newsock = control_sock->ops->accept(control_sock);
- DBG("Relay control connection accepted, socket %d",
- newsock->fd);
+ newsock = accept_relayd_sock(control_sock,
+ "Control socket to relayd");
}
if (!newsock) {
PERROR("accepting sock");
error:
error_poll_add:
error_testpoint:
- lttng_poll_clean(&events);
+ (void) fd_tracker_util_poll_clean(the_fd_tracker, &events);
error_create_poll:
if (data_sock->fd >= 0) {
- ret = data_sock->ops->close(data_sock);
+ int data_sock_fd = data_sock->fd;
+
+ ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker,
+ &data_sock_fd, 1, close_sock,
+ data_sock);
if (ret) {
- PERROR("close");
+ PERROR("Failed to close the data listener socket file descriptor");
}
+ data_sock->fd = -1;
}
lttcomm_destroy_sock(data_sock);
error_sock_relay:
if (control_sock->fd >= 0) {
- ret = control_sock->ops->close(control_sock);
+ int control_sock_fd = control_sock->fd;
+
+ ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker,
+ &control_sock_fd, 1, close_sock,
+ control_sock);
if (ret) {
- PERROR("close");
+ PERROR("Failed to close the control listener socket file descriptor");
}
+ control_sock->fd = -1;
}
lttcomm_destroy_sock(control_sock);
error_sock_control:
ERR("Health error occurred in %s", __func__);
}
health_unregister(health_relayd);
+ rcu_unregister_thread();
DBG("Relay listener thread cleanup complete");
lttng_relay_stop_threads();
return NULL;
return NULL;
}
-/*
- * Set index data from the control port to a given index object.
- */
-static int set_index_control_data(struct relay_index *index,
- struct lttcomm_relayd_index *data,
- struct relay_connection *conn)
-{
- struct ctf_packet_index index_data;
-
- /*
- * The index on disk is encoded in big endian.
- */
- index_data.packet_size = htobe64(data->packet_size);
- index_data.content_size = htobe64(data->content_size);
- index_data.timestamp_begin = htobe64(data->timestamp_begin);
- index_data.timestamp_end = htobe64(data->timestamp_end);
- index_data.events_discarded = htobe64(data->events_discarded);
- index_data.stream_id = htobe64(data->stream_id);
-
- if (conn->minor >= 8) {
- index->index_data.stream_instance_id = htobe64(data->stream_instance_id);
- index->index_data.packet_seq_num = htobe64(data->packet_seq_num);
- }
-
- return relay_index_set_data(index, &index_data);
-}
-
static bool session_streams_have_index(const struct relay_session *session)
{
return session->minor >= 4 && !session->snapshot;
int ret = 0;
ssize_t send_ret;
struct relay_session *session = NULL;
- struct lttcomm_relayd_status_session reply = {};
+ struct lttcomm_relayd_create_session_reply_2_11 reply = {};
char session_name[LTTNG_NAME_MAX] = {};
char hostname[LTTNG_HOST_NAME_MAX] = {};
uint32_t live_timer = 0;
bool snapshot = false;
+ bool session_name_contains_creation_timestamp = false;
/* Left nil for peers < 2.11. */
+ char base_path[LTTNG_PATH_MAX] = {};
lttng_uuid sessiond_uuid = {};
LTTNG_OPTIONAL(uint64_t) id_sessiond = {};
LTTNG_OPTIONAL(uint64_t) current_chunk_id = {};
LTTNG_OPTIONAL(time_t) creation_time = {};
+ struct lttng_dynamic_buffer reply_payload;
+
+ lttng_dynamic_buffer_init(&reply_payload);
if (conn->minor < 4) {
/* From 2.1 to 2.3 */
/* From 2.11 to ... */
ret = cmd_create_session_2_11(payload, session_name, hostname,
- &live_timer, &snapshot, &id_sessiond_value,
+ base_path, &live_timer, &snapshot, &id_sessiond_value,
sessiond_uuid, &has_current_chunk,
- ¤t_chunk_id_value, &creation_time_value);
+ ¤t_chunk_id_value, &creation_time_value,
+ &session_name_contains_creation_timestamp);
if (lttng_uuid_is_nil(sessiond_uuid)) {
/* The nil UUID is reserved for pre-2.11 clients. */
ERR("Illegal nil UUID announced by peer in create session command");
goto send_reply;
}
- session = session_create(session_name, hostname, live_timer,
+ session = session_create(session_name, hostname, base_path, live_timer,
snapshot, sessiond_uuid,
id_sessiond.is_set ? &id_sessiond.value : NULL,
current_chunk_id.is_set ? ¤t_chunk_id.value : NULL,
creation_time.is_set ? &creation_time.value : NULL,
- conn->major, conn->minor);
+ conn->major, conn->minor,
+ session_name_contains_creation_timestamp);
if (!session) {
ret = -1;
goto send_reply;
conn->session = session;
DBG("Created session %" PRIu64, session->id);
- reply.session_id = htobe64(session->id);
+ reply.generic.session_id = htobe64(session->id);
send_reply:
if (ret < 0) {
- reply.ret_code = htobe32(LTTNG_ERR_FATAL);
+ reply.generic.ret_code = htobe32(LTTNG_ERR_FATAL);
} else {
- reply.ret_code = htobe32(LTTNG_OK);
+ reply.generic.ret_code = htobe32(LTTNG_OK);
}
- send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"create session\" command reply (ret = %zd)",
- send_ret);
+ if (conn->minor < 11) {
+ /* From 2.1 to 2.10 */
+ ret = lttng_dynamic_buffer_append(&reply_payload,
+ &reply.generic, sizeof(reply.generic));
+ if (ret) {
+ ERR("Failed to append \"create session\" command reply header to payload buffer");
+ ret = -1;
+ goto end;
+ }
+ } else {
+ const uint32_t output_path_length =
+ session ? strlen(session->output_path) + 1 : 0;
+
+ reply.output_path_length = htobe32(output_path_length);
+ ret = lttng_dynamic_buffer_append(
+ &reply_payload, &reply, sizeof(reply));
+ if (ret) {
+ ERR("Failed to append \"create session\" command reply header to payload buffer");
+ goto end;
+ }
+
+ if (output_path_length) {
+ ret = lttng_dynamic_buffer_append(&reply_payload,
+ session->output_path,
+ output_path_length);
+ if (ret) {
+ ERR("Failed to append \"create session\" command reply path to payload buffer");
+ goto end;
+ }
+ }
+ }
+
+ send_ret = conn->sock->ops->sendmsg(conn->sock, reply_payload.data,
+ reply_payload.size, 0);
+ if (send_ret < (ssize_t) reply_payload.size) {
+ ERR("Failed to send \"create session\" command reply of %zu bytes (ret = %zd)",
+ reply_payload.size, send_ret);
ret = -1;
}
+end:
if (ret < 0 && session) {
session_put(session);
}
+ lttng_dynamic_buffer_reset(&reply_payload);
return ret;
}
goto send_reply;
}
+ /*
+ * Backward compatibility for --group-output-by-session.
+ * Prior to lttng 2.11, the complete path is passed by the stream.
+ * Starting at 2.11, lttng-relayd uses chunk. When dealing with producer
+ * >=2.11 the chunk is responsible for the output path. When dealing
+ * with producer < 2.11 the chunk output_path is the root output path
+ * and the stream carries the complete path (path_name).
+ * To support --group-output-by-session with older producer (<2.11), we
+ * need to craft the path based on the stream path.
+ */
+ if (opt_group_output_by == RELAYD_GROUP_OUTPUT_BY_SESSION) {
+ if (conn->minor < 4) {
+ /*
+ * From 2.1 to 2.3, the session_name is not passed on
+ * the RELAYD_CREATE_SESSION command. The session name
+ * is necessary to detect the presence of a base_path
+ * inside the stream path. Without it we cannot perform
+ * a valid group-output-by-session transformation.
+ */
+ WARN("Unable to perform a --group-by-session transformation for session %" PRIu64
+ " for stream with path \"%s\" as it is produced by a peer using a protocol older than v2.4",
+ session->id, path_name);
+ } else if (conn->minor >= 4 && conn->minor < 11) {
+ char *group_by_session_path_name;
+
+ assert(session->session_name[0] != '\0');
+
+ group_by_session_path_name =
+ backward_compat_group_by_session(
+ path_name,
+ session->session_name,
+ session->creation_time.value);
+ if (!group_by_session_path_name) {
+ ERR("Failed to apply group by session to stream of session %" PRIu64,
+ session->id);
+ goto send_reply;
+ }
+
+ DBG("Transformed session path from \"%s\" to \"%s\" to honor per-session name grouping",
+ path_name, group_by_session_path_name);
+
+ free(path_name);
+ path_name = group_by_session_path_name;
+ }
+ }
+
trace = ctf_trace_get_by_path_or_create(session, path_name);
if (!trace) {
goto send_reply;
}
- /* This stream here has one reference on the trace. */
+ /* This stream here has one reference on the trace. */
pthread_mutex_lock(&last_relay_stream_id_lock);
stream_handle = ++last_relay_stream_id;
pthread_mutex_unlock(&last_relay_stream_id_lock);
vstream = viewer_stream_get_by_id(stream->stream_handle);
if (vstream) {
- if (vstream->metadata_sent == stream->metadata_received) {
+ if (stream->no_new_metadata_notified) {
/*
* Since all the metadata has been sent to the
* viewer and that we have a request to close
goto end_unlock;
}
- ret = utils_rotate_stream_file(stream->path_name, stream->channel_name,
- 0, 0, -1, -1, stream->stream_fd->fd, NULL,
- &stream->stream_fd->fd);
+ ret = stream_reset_file(stream);
if (ret < 0) {
- ERR("Failed to rotate metadata file %s of channel %s",
- stream->path_name, stream->channel_name);
+ ERR("Failed to reset metadata stream %" PRIu64
+ ": stream_path = %s, channel = %s",
+ stream->stream_handle, stream->path_name,
+ stream->channel_name);
goto end_unlock;
}
-
end_unlock:
pthread_mutex_unlock(&stream->lock);
stream_put(stream);
}
/*
- * Append padding to the file pointed by the file descriptor fd.
+ * relay_recv_metadata: receive the metadata for the session.
*/
-static int write_padding_to_file(int fd, uint32_t size)
+static int relay_recv_metadata(const struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn,
+ const struct lttng_buffer_view *payload)
{
- ssize_t ret = 0;
- char *zeros;
+ int ret = 0;
+ struct relay_session *session = conn->session;
+ struct lttcomm_relayd_metadata_payload metadata_payload_header;
+ struct relay_stream *metadata_stream;
+ uint64_t metadata_payload_size;
+ struct lttng_buffer_view packet_view;
- if (size == 0) {
+ if (!session) {
+ ERR("Metadata sent before version check");
+ ret = -1;
goto end;
}
- zeros = zmalloc(size);
- if (zeros == NULL) {
- PERROR("zmalloc zeros for padding");
+ if (recv_hdr->data_size < sizeof(struct lttcomm_relayd_metadata_payload)) {
+ ERR("Incorrect data size");
ret = -1;
goto end;
}
+ metadata_payload_size = recv_hdr->data_size -
+ sizeof(struct lttcomm_relayd_metadata_payload);
+
+ memcpy(&metadata_payload_header, payload->data,
+ sizeof(metadata_payload_header));
+ metadata_payload_header.stream_id = be64toh(
+ metadata_payload_header.stream_id);
+ metadata_payload_header.padding_size = be32toh(
+ metadata_payload_header.padding_size);
- ret = lttng_write(fd, zeros, size);
- if (ret < size) {
- PERROR("write padding to file");
+ metadata_stream = stream_get_by_id(metadata_payload_header.stream_id);
+ if (!metadata_stream) {
+ ret = -1;
+ goto end;
}
- free(zeros);
-
-end:
- return ret;
-}
-
-/*
- * Close the current index file if it is open, and create a new one.
- *
- * Return 0 on success, -1 on error.
- */
-static
-int create_rotate_index_file(struct relay_stream *stream,
- const char *channel_path)
-{
- int ret;
- uint32_t major, minor;
-
- ASSERT_LOCKED(stream->lock);
-
- /* Put ref on previous index_file. */
- if (stream->index_file) {
- lttng_index_file_put(stream->index_file);
- stream->index_file = NULL;
- }
- major = stream->trace->session->major;
- minor = stream->trace->session->minor;
- if (!stream->trace->index_folder_created) {
- char *index_subpath = NULL;
-
- ret = asprintf(&index_subpath, "%s/%s", channel_path, DEFAULT_INDEX_DIR);
- if (ret < 0) {
- goto end;
- }
-
- ret = lttng_trace_chunk_create_subdirectory(stream->trace_chunk, index_subpath);
- free(index_subpath);
- if (ret) {
- goto end;
- }
- stream->trace->index_folder_created = true;
- }
- stream->index_file = lttng_index_file_create_from_trace_chunk(
- stream->trace_chunk, channel_path, stream->channel_name,
- stream->tracefile_size, stream->tracefile_count,
- lttng_to_index_major(major, minor),
- lttng_to_index_minor(major, minor), true);
- if (!stream->index_file) {
- ret = -1;
- goto end;
- }
-
- ret = 0;
-
-end:
- return ret;
-}
-
-static
-int do_rotate_stream_data(struct relay_stream *stream)
-{
- int ret;
-
- DBG("Rotating stream %" PRIu64 " data file",
- stream->stream_handle);
- /* Perform the stream rotation. */
- ret = utils_rotate_stream_file(stream->path_name,
- stream->channel_name, stream->tracefile_size,
- stream->tracefile_count, -1,
- -1, stream->stream_fd->fd,
- NULL, &stream->stream_fd->fd);
- if (ret < 0) {
- ERR("Rotating stream output file");
- goto end;
- }
- stream->tracefile_size_current = 0;
- stream->pos_after_last_complete_data_index = 0;
- stream->data_rotated = true;
-
- if (stream->data_rotated && stream->index_rotated) {
- /* Rotation completed; reset its state. */
- DBG("Rotation completed for stream %" PRIu64,
- stream->stream_handle);
- stream->rotate_at_seq_num = -1ULL;
- stream->data_rotated = false;
- stream->index_rotated = false;
- }
-end:
- return ret;
-}
-
-/*
- * If too much data has been written in a tracefile before we received the
- * rotation command, we have to move the excess data to the new tracefile and
- * perform the rotation. This can happen because the control and data
- * connections are separate, the indexes as well as the commands arrive from
- * the control connection and we have no control over the order so we could be
- * in a situation where too much data has been received on the data connection
- * before the rotation command on the control connection arrives.
- */
-static
-int rotate_truncate_stream(struct relay_stream *stream)
-{
- int ret, new_fd;
- off_t lseek_ret;
- uint64_t diff, pos = 0;
- char buf[FILE_COPY_BUFFER_SIZE];
-
- assert(!stream->is_metadata);
-
- assert(stream->tracefile_size_current >
- stream->pos_after_last_complete_data_index);
- diff = stream->tracefile_size_current -
- stream->pos_after_last_complete_data_index;
-
- /* Create the new tracefile. */
- new_fd = utils_create_stream_file(stream->path_name,
- stream->channel_name,
- stream->tracefile_size, stream->tracefile_count,
- /* uid */ -1, /* gid */ -1, /* suffix */ NULL);
- if (new_fd < 0) {
- ERR("Failed to create new stream file at path %s for channel %s",
- stream->path_name, stream->channel_name);
- ret = -1;
- goto end;
- }
-
- /*
- * Rewind the current tracefile to the position at which the rotation
- * should have occurred.
- */
- lseek_ret = lseek(stream->stream_fd->fd,
- stream->pos_after_last_complete_data_index, SEEK_SET);
- if (lseek_ret < 0) {
- PERROR("seek truncate stream");
- ret = -1;
- goto end;
- }
-
- /* Move data from the old file to the new file. */
- while (pos < diff) {
- uint64_t count, bytes_left;
- ssize_t io_ret;
-
- bytes_left = diff - pos;
- count = bytes_left > sizeof(buf) ? sizeof(buf) : bytes_left;
- assert(count <= SIZE_MAX);
-
- io_ret = lttng_read(stream->stream_fd->fd, buf, count);
- if (io_ret < (ssize_t) count) {
- char error_string[256];
-
- snprintf(error_string, sizeof(error_string),
- "Failed to read %" PRIu64 " bytes from fd %i in rotate_truncate_stream(), returned %zi",
- count, stream->stream_fd->fd, io_ret);
- if (io_ret == -1) {
- PERROR("%s", error_string);
- } else {
- ERR("%s", error_string);
- }
- ret = -1;
- goto end;
- }
-
- io_ret = lttng_write(new_fd, buf, count);
- if (io_ret < (ssize_t) count) {
- char error_string[256];
-
- snprintf(error_string, sizeof(error_string),
- "Failed to write %" PRIu64 " bytes from fd %i in rotate_truncate_stream(), returned %zi",
- count, new_fd, io_ret);
- if (io_ret == -1) {
- PERROR("%s", error_string);
- } else {
- ERR("%s", error_string);
- }
- ret = -1;
- goto end;
- }
-
- pos += count;
- }
-
- /* Truncate the file to get rid of the excess data. */
- ret = ftruncate(stream->stream_fd->fd,
- stream->pos_after_last_complete_data_index);
- if (ret) {
- PERROR("ftruncate");
- goto end;
- }
-
- ret = close(stream->stream_fd->fd);
- if (ret < 0) {
- PERROR("Closing tracefile");
- goto end;
- }
-
- /*
- * Update the offset and FD of all the eventual indexes created by the
- * data connection before the rotation command arrived.
- */
- ret = relay_index_switch_all_files(stream);
- if (ret < 0) {
- ERR("Failed to rotate index file");
- goto end;
- }
-
- stream->stream_fd->fd = new_fd;
- stream->tracefile_size_current = diff;
- stream->pos_after_last_complete_data_index = 0;
- stream->rotate_at_seq_num = -1ULL;
-
- ret = 0;
-
-end:
- return ret;
-}
-
-/*
- * Check if a stream's index file should be rotated (for session rotation).
- * Must be called with the stream lock held.
- *
- * Return 0 on success, a negative value on error.
- */
-static
-int try_rotate_stream_index(struct relay_stream *stream)
-{
- int ret = 0;
-
- if (stream->rotate_at_seq_num == -1ULL) {
- /* No rotation expected. */
- goto end;
- }
-
- if (stream->index_rotated) {
- /* Rotation of the index has already occurred. */
- goto end;
- }
-
- if (stream->prev_index_seq == -1ULL ||
- stream->prev_index_seq < stream->rotate_at_seq_num) {
- DBG("Stream %" PRIu64 " index not yet ready for rotation (rotate_at_seq_num = %" PRIu64 ", prev_index_seq = %" PRIu64 ")",
- stream->stream_handle,
- stream->rotate_at_seq_num,
- stream->prev_index_seq);
- goto end;
- } else if (stream->prev_index_seq != stream->rotate_at_seq_num) {
- /*
- * Unexpected, protocol error/bug.
- * It could mean that we received a rotation position
- * that is in the past.
- */
- ERR("Stream %" PRIu64 " index is in an inconsistent state (rotate_at_seq_num = %" PRIu64 ", prev_data_seq = %" PRIu64 ", prev_index_seq = %" PRIu64 ")",
- stream->stream_handle,
- stream->rotate_at_seq_num,
- stream->prev_data_seq,
- stream->prev_index_seq);
- ret = -1;
- goto end;
- } else {
- DBG("Rotating stream %" PRIu64 " index file",
- stream->stream_handle);
- ret = create_rotate_index_file(stream, stream->path_name);
- stream->index_rotated = true;
-
- if (stream->data_rotated && stream->index_rotated) {
- /* Rotation completed; reset its state. */
- DBG("Rotation completed for stream %" PRIu64,
- stream->stream_handle);
- stream->rotate_at_seq_num = -1ULL;
- stream->data_rotated = false;
- stream->index_rotated = false;
- }
- }
-
-end:
- return ret;
-}
-
-/*
- * Check if a stream's data file (as opposed to index) should be rotated
- * (for session rotation).
- * Must be called with the stream lock held.
- *
- * Return 0 on success, a negative value on error.
- */
-static
-int try_rotate_stream_data(struct relay_stream *stream)
-{
- int ret = 0;
-
- if (stream->rotate_at_seq_num == -1ULL) {
- /* No rotation expected. */
- goto end;
- }
-
- if (stream->data_rotated) {
- /* Rotation of the data file has already occurred. */
- goto end;
- }
-
- if (stream->prev_data_seq == -1ULL ||
- stream->prev_data_seq < stream->rotate_at_seq_num) {
- DBG("Stream %" PRIu64 " not yet ready for rotation (rotate_at_seq_num = %" PRIu64 ", prev_data_seq = %" PRIu64 ")",
- stream->stream_handle,
- stream->rotate_at_seq_num,
- stream->prev_data_seq);
- goto end;
- } else if (stream->prev_data_seq > stream->rotate_at_seq_num) {
- /*
- * prev_data_seq is checked here since indexes and rotation
- * commands are serialized with respect to each other.
- */
- DBG("Rotation after too much data has been written in tracefile "
- "for stream %" PRIu64 ", need to truncate before "
- "rotating", stream->stream_handle);
- ret = rotate_truncate_stream(stream);
- if (ret) {
- ERR("Failed to truncate stream");
- goto end;
- }
- } else if (stream->prev_data_seq != stream->rotate_at_seq_num) {
- /*
- * Unexpected, protocol error/bug.
- * It could mean that we received a rotation position
- * that is in the past.
- */
- ERR("Stream %" PRIu64 " data is in an inconsistent state (rotate_at_seq_num = %" PRIu64 ", prev_data_seq = %" PRIu64 ")",
- stream->stream_handle,
- stream->rotate_at_seq_num,
- stream->prev_data_seq);
- ret = -1;
- goto end;
- } else {
- ret = do_rotate_stream_data(stream);
- }
-
-end:
- return ret;
-}
-
-/*
- * relay_recv_metadata: receive the metadata for the session.
- */
-static int relay_recv_metadata(const struct lttcomm_relayd_hdr *recv_hdr,
- struct relay_connection *conn,
- const struct lttng_buffer_view *payload)
-{
- int ret = 0;
- ssize_t size_ret;
- struct relay_session *session = conn->session;
- struct lttcomm_relayd_metadata_payload metadata_payload_header;
- struct relay_stream *metadata_stream;
- uint64_t metadata_payload_size;
-
- if (!session) {
- ERR("Metadata sent before version check");
- ret = -1;
- goto end;
- }
-
- if (recv_hdr->data_size < sizeof(struct lttcomm_relayd_metadata_payload)) {
- ERR("Incorrect data size");
- ret = -1;
- goto end;
- }
- metadata_payload_size = recv_hdr->data_size -
- sizeof(struct lttcomm_relayd_metadata_payload);
-
- memcpy(&metadata_payload_header, payload->data,
- sizeof(metadata_payload_header));
- metadata_payload_header.stream_id = be64toh(
- metadata_payload_header.stream_id);
- metadata_payload_header.padding_size = be32toh(
- metadata_payload_header.padding_size);
-
- metadata_stream = stream_get_by_id(metadata_payload_header.stream_id);
- if (!metadata_stream) {
- ret = -1;
- goto end;
- }
+ packet_view = lttng_buffer_view_from_view(payload,
+ sizeof(metadata_payload_header), metadata_payload_size);
+ if (!packet_view.data) {
+ ERR("Invalid metadata packet length announced by header");
+ ret = -1;
+ goto end_put;
+ }
pthread_mutex_lock(&metadata_stream->lock);
-
- size_ret = lttng_write(metadata_stream->stream_fd->fd,
- payload->data + sizeof(metadata_payload_header),
- metadata_payload_size);
- if (size_ret < metadata_payload_size) {
- ERR("Relay error writing metadata on file");
- ret = -1;
- goto end_put;
- }
-
- size_ret = write_padding_to_file(metadata_stream->stream_fd->fd,
+ ret = stream_write(metadata_stream, &packet_view,
metadata_payload_header.padding_size);
- if (size_ret < (int64_t) metadata_payload_header.padding_size) {
+ pthread_mutex_unlock(&metadata_stream->lock);
+ if (ret){
ret = -1;
goto end_put;
}
-
- metadata_stream->metadata_received +=
- metadata_payload_size + metadata_payload_header.padding_size;
- DBG2("Relay metadata written. Updated metadata_received %" PRIu64,
- metadata_stream->metadata_received);
-
- ret = try_rotate_stream_data(metadata_stream);
- if (ret < 0) {
- goto end_put;
- }
-
end_put:
- pthread_mutex_unlock(&metadata_stream->lock);
stream_put(metadata_stream);
end:
return ret;
ssize_t send_ret;
struct relay_session *session = conn->session;
struct lttcomm_relayd_index index_info;
- struct relay_index *index;
struct lttcomm_relayd_generic_reply reply;
struct relay_stream *stream;
size_t msg_len;
index_info.stream_instance_id =
be64toh(index_info.stream_instance_id);
index_info.packet_seq_num = be64toh(index_info.packet_seq_num);
+ } else {
+ index_info.stream_instance_id = -1ULL;
+ index_info.packet_seq_num = -1ULL;
}
stream = stream_get_by_id(index_info.relay_stream_id);
ret = -1;
goto end;
}
- pthread_mutex_lock(&stream->lock);
-
- /* Live beacon handling */
- if (index_info.packet_size == 0) {
- DBG("Received live beacon for stream %" PRIu64,
- stream->stream_handle);
-
- /*
- * Only flag a stream inactive when it has already
- * received data and no indexes are in flight.
- */
- if (stream->index_received_seqcount > 0
- && stream->indexes_in_flight == 0) {
- stream->beacon_ts_end = index_info.timestamp_end;
- }
- ret = 0;
- goto end_stream_put;
- } else {
- stream->beacon_ts_end = -1ULL;
- }
- if (stream->ctf_stream_id == -1ULL) {
- stream->ctf_stream_id = index_info.stream_id;
- }
- index = relay_index_get_by_id_or_create(stream, index_info.net_seq_num);
- if (!index) {
- ret = -1;
- ERR("relay_index_get_by_id_or_create index NULL");
- goto end_stream_put;
- }
- if (set_index_control_data(index, &index_info, conn)) {
- ERR("set_index_control_data error");
- relay_index_put(index);
- ret = -1;
+ pthread_mutex_lock(&stream->lock);
+ ret = stream_add_index(stream, &index_info);
+ pthread_mutex_unlock(&stream->lock);
+ if (ret) {
goto end_stream_put;
}
- ret = relay_index_try_flush(index);
- if (ret == 0) {
- tracefile_array_commit_seq(stream->tfa);
- stream->index_received_seqcount++;
- stream->pos_after_last_complete_data_index += index->total_size;
- stream->prev_index_seq = index_info.net_seq_num;
-
- ret = try_rotate_stream_index(stream);
- if (ret < 0) {
- goto end_stream_put;
- }
- } else if (ret > 0) {
- /* no flush. */
- ret = 0;
- } else {
- /*
- * ret < 0
- *
- * relay_index_try_flush is responsible for the self-reference
- * put of the index object on error.
- */
- ERR("relay_index_try_flush error %d", ret);
- ret = -1;
- }
end_stream_put:
- pthread_mutex_unlock(&stream->lock);
stream_put(stream);
-
end:
-
memset(&reply, 0, sizeof(reply));
if (ret < 0) {
reply.ret_code = htobe32(LTTNG_ERR_UNK);
}
/*
- * relay_rotate_session_stream: rotate a stream to a new tracefile for the session
- * rotation feature (not the tracefile rotation feature).
+ * relay_rotate_session_stream: rotate a stream to a new tracefile for the
+ * session rotation feature (not the tracefile rotation feature).
*/
-static int relay_rotate_session_stream(const struct lttcomm_relayd_hdr *recv_hdr,
+static int relay_rotate_session_streams(
+ const struct lttcomm_relayd_hdr *recv_hdr,
struct relay_connection *conn,
const struct lttng_buffer_view *payload)
{
- int ret;
+ int ret = 0;
+ uint32_t i;
ssize_t send_ret;
+ enum lttng_error_code reply_code = LTTNG_ERR_UNK;
struct relay_session *session = conn->session;
- struct lttcomm_relayd_rotate_stream stream_info;
- struct lttcomm_relayd_generic_reply reply;
- struct relay_stream *stream;
- size_t header_len;
- size_t path_len;
- struct lttng_buffer_view new_path_view;
+ struct lttcomm_relayd_rotate_streams rotate_streams;
+ struct lttcomm_relayd_generic_reply reply = {};
+ struct relay_stream *stream = NULL;
+ const size_t header_len = sizeof(struct lttcomm_relayd_rotate_streams);
+ struct lttng_trace_chunk *next_trace_chunk = NULL;
+ struct lttng_buffer_view stream_positions;
+ char chunk_id_buf[MAX_INT_DEC_LEN(uint64_t)];
+ const char *chunk_id_str = "none";
if (!session || !conn->version_check_done) {
ERR("Trying to rotate a stream before version check");
goto end_no_reply;
}
- header_len = sizeof(struct lttcomm_relayd_rotate_stream);
-
if (payload->size < header_len) {
ERR("Unexpected payload size in \"relay_rotate_session_stream\": expected >= %zu bytes, got %zu bytes",
header_len, payload->size);
goto end_no_reply;
}
- memcpy(&stream_info, payload->data, header_len);
+ memcpy(&rotate_streams, payload->data, header_len);
- /* Convert to host */
- stream_info.pathname_length = be32toh(stream_info.pathname_length);
- stream_info.stream_id = be64toh(stream_info.stream_id);
- stream_info.new_chunk_id = be64toh(stream_info.new_chunk_id);
- stream_info.rotate_at_seq_num = be64toh(stream_info.rotate_at_seq_num);
+ /* Convert header to host endianness. */
+ rotate_streams = (typeof(rotate_streams)) {
+ .stream_count = be32toh(rotate_streams.stream_count),
+ .new_chunk_id = (typeof(rotate_streams.new_chunk_id)) {
+ .is_set = !!rotate_streams.new_chunk_id.is_set,
+ .value = be64toh(rotate_streams.new_chunk_id.value),
+ }
+ };
- path_len = stream_info.pathname_length;
- if (payload->size < header_len + path_len) {
- ERR("Unexpected payload size in \"relay_rotate_session_stream\" including path: expected >= %zu bytes, got %zu bytes",
- header_len + path_len, payload->size);
- ret = -1;
- goto end_no_reply;
- }
-
- /* Ensure it fits in local filename length. */
- if (path_len >= LTTNG_PATH_MAX) {
- ret = -ENAMETOOLONG;
- ERR("Length of relay_rotate_session_stream command's path name (%zu bytes) exceeds the maximal allowed length of %i bytes",
- path_len, LTTNG_PATH_MAX);
- goto end;
+ if (rotate_streams.new_chunk_id.is_set) {
+ /*
+ * Retrieve the trace chunk the stream must transition to. As
+ * per the protocol, this chunk should have been created
+ * before this command is received.
+ */
+ next_trace_chunk = sessiond_trace_chunk_registry_get_chunk(
+ sessiond_trace_chunk_registry,
+ session->sessiond_uuid, session->id,
+ rotate_streams.new_chunk_id.value);
+ if (!next_trace_chunk) {
+ char uuid_str[LTTNG_UUID_STR_LEN];
+
+ lttng_uuid_to_str(session->sessiond_uuid, uuid_str);
+ ERR("Unknown next trace chunk in ROTATE_STREAMS command: sessiond_uuid = {%s}, session_id = %" PRIu64
+ ", trace_chunk_id = %" PRIu64,
+ uuid_str, session->id,
+ rotate_streams.new_chunk_id.value);
+ reply_code = LTTNG_ERR_INVALID_PROTOCOL;
+ ret = -1;
+ goto end;
+ }
+
+ ret = snprintf(chunk_id_buf, sizeof(chunk_id_buf), "%" PRIu64,
+ rotate_streams.new_chunk_id.value);
+ if (ret < 0 || ret >= sizeof(chunk_id_buf)) {
+ chunk_id_str = "formatting error";
+ } else {
+ chunk_id_str = chunk_id_buf;
+ }
}
- new_path_view = lttng_buffer_view_from_view(payload, header_len,
- stream_info.pathname_length);
+ DBG("Rotate %" PRIu32 " streams of session \"%s\" to chunk \"%s\"",
+ rotate_streams.stream_count, session->session_name,
+ chunk_id_str);
- stream = stream_get_by_id(stream_info.stream_id);
- if (!stream) {
+ stream_positions = lttng_buffer_view_from_view(payload,
+ sizeof(rotate_streams), -1);
+ if (!stream_positions.data ||
+ stream_positions.size <
+ (rotate_streams.stream_count *
+ sizeof(struct lttcomm_relayd_stream_rotation_position))) {
+ reply_code = LTTNG_ERR_INVALID_PROTOCOL;
ret = -1;
goto end;
}
- pthread_mutex_lock(&stream->lock);
+ for (i = 0; i < rotate_streams.stream_count; i++) {
+ struct lttcomm_relayd_stream_rotation_position *position_comm =
+ &((typeof(position_comm)) stream_positions.data)[i];
+ const struct lttcomm_relayd_stream_rotation_position pos = {
+ .stream_id = be64toh(position_comm->stream_id),
+ .rotate_at_seq_num = be64toh(
+ position_comm->rotate_at_seq_num),
+ };
- /*
- * Update the trace path (just the folder, the stream name does not
- * change).
- */
- free(stream->prev_path_name);
- stream->prev_path_name = stream->path_name;
- stream->path_name = create_output_path(new_path_view.data);
- if (!stream->path_name) {
- ERR("Failed to create a new output path");
- ret = -1;
- goto end_stream_unlock;
- }
- ret = utils_mkdir_recursive(stream->path_name, S_IRWXU | S_IRWXG,
- -1, -1);
- if (ret < 0) {
- ERR("relay creating output directory");
- ret = -1;
- goto end_stream_unlock;
- }
-
- if (stream->is_metadata) {
- /*
- * Metadata streams have no index; consider its rotation
- * complete.
- */
- stream->index_rotated = true;
- /*
- * The metadata stream is sent only over the control connection
- * so we know we have all the data to perform the stream
- * rotation.
- */
- ret = do_rotate_stream_data(stream);
- } else {
- stream->rotate_at_seq_num = stream_info.rotate_at_seq_num;
- ret = try_rotate_stream_data(stream);
- if (ret < 0) {
- goto end_stream_unlock;
+ stream = stream_get_by_id(pos.stream_id);
+ if (!stream) {
+ reply_code = LTTNG_ERR_INVALID;
+ ret = -1;
+ goto end;
}
- ret = try_rotate_stream_index(stream);
- if (ret < 0) {
- goto end_stream_unlock;
+ pthread_mutex_lock(&stream->lock);
+ ret = stream_set_pending_rotation(stream, next_trace_chunk,
+ pos.rotate_at_seq_num);
+ pthread_mutex_unlock(&stream->lock);
+ if (ret) {
+ reply_code = LTTNG_ERR_FILE_CREATION_ERROR;
+ goto end;
}
+
+ stream_put(stream);
+ stream = NULL;
}
-end_stream_unlock:
- pthread_mutex_unlock(&stream->lock);
- stream_put(stream);
+ reply_code = LTTNG_OK;
+ ret = 0;
end:
- memset(&reply, 0, sizeof(reply));
- if (ret < 0) {
- reply.ret_code = htobe32(LTTNG_ERR_UNK);
- } else {
- reply.ret_code = htobe32(LTTNG_OK);
+ if (stream) {
+ stream_put(stream);
}
+
+ reply.ret_code = htobe32((uint32_t) reply_code);
send_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
sizeof(struct lttcomm_relayd_generic_reply), 0);
if (send_ret < (ssize_t) sizeof(reply)) {
send_ret);
ret = -1;
}
-
end_no_reply:
+ lttng_trace_chunk_put(next_trace_chunk);
return ret;
}
-static int init_session_output_directory_handle(struct relay_session *session,
- struct lttng_directory_handle *handle)
-{
- int ret;
- /* hostname/session_name */
- char *session_directory = NULL;
- /*
- * base path + session_directory
- * e.g. /home/user/lttng-traces/hostname/session_name
- */
- char *full_session_path = NULL;
- char creation_time_str[16];
- struct tm *timeinfo;
-
- assert(session->creation_time.is_set);
- timeinfo = localtime(&session->creation_time.value);
- if (!timeinfo) {
- ret = -1;
- goto end;
- }
- strftime(creation_time_str, sizeof(creation_time_str), "%Y%m%d-%H%M%S",
- timeinfo);
- pthread_mutex_lock(&session->lock);
- ret = asprintf(&session_directory, "%s/%s-%s", session->hostname,
- session->session_name, creation_time_str);
- pthread_mutex_unlock(&session->lock);
- if (ret < 0) {
- PERROR("Failed to format session directory name");
- goto end;
- }
-
- full_session_path = create_output_path(session_directory);
- if (!full_session_path) {
- ret = -1;
- goto end;
- }
-
- ret = utils_mkdir_recursive(
- full_session_path, S_IRWXU | S_IRWXG, -1, -1);
- if (ret) {
- ERR("Failed to create session output path \"%s\"",
- full_session_path);
- goto end;
- }
-
- ret = lttng_directory_handle_init(handle, full_session_path);
- if (ret) {
- goto end;
- }
-end:
- free(session_directory);
- free(full_session_path);
- return ret;
-}
/*
* relay_create_trace_chunk: create a new trace chunk
struct lttng_trace_chunk *chunk = NULL, *published_chunk = NULL;
enum lttng_error_code reply_code = LTTNG_OK;
enum lttng_trace_chunk_status chunk_status;
- struct lttng_directory_handle session_output;
+ const char *new_path;
if (!session || !conn->version_check_done) {
ERR("Trying to create a trace chunk before version check");
msg->creation_timestamp = be64toh(msg->creation_timestamp);
msg->override_name_length = be32toh(msg->override_name_length);
+ if (session->current_trace_chunk &&
+ !lttng_trace_chunk_get_name_overridden(session->current_trace_chunk)) {
+ chunk_status = lttng_trace_chunk_rename_path(session->current_trace_chunk,
+ DEFAULT_CHUNK_TMP_OLD_DIRECTORY);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ERR("Failed to rename old chunk");
+ ret = -1;
+ reply_code = LTTNG_ERR_UNK;
+ goto end;
+ }
+ }
+ session->ongoing_rotation = true;
+ if (!session->current_trace_chunk) {
+ if (!session->has_rotated) {
+ new_path = "";
+ } else {
+ new_path = NULL;
+ }
+ } else {
+ new_path = DEFAULT_CHUNK_TMP_NEW_DIRECTORY;
+ }
chunk = lttng_trace_chunk_create(
- msg->chunk_id, msg->creation_timestamp);
+ msg->chunk_id, msg->creation_timestamp, new_path);
if (!chunk) {
ERR("Failed to create trace chunk in trace chunk creation command");
ret = -1;
reply_code = LTTNG_ERR_NOMEM;
goto end;
}
+ lttng_trace_chunk_set_fd_tracker(chunk, the_fd_tracker);
if (msg->override_name_length) {
const char *name;
}
}
- ret = init_session_output_directory_handle(
- conn->session, &session_output);
- if (ret) {
- reply_code = LTTNG_ERR_CREATE_DIR_FAIL;
- goto end;
- }
-
chunk_status = lttng_trace_chunk_set_credentials_current_user(chunk);
if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
reply_code = LTTNG_ERR_UNK;
goto end;
}
- chunk_status = lttng_trace_chunk_set_as_owner(chunk, &session_output);
+ assert(conn->session->output_directory);
+ chunk_status = lttng_trace_chunk_set_as_owner(chunk,
+ conn->session->output_directory);
if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
reply_code = LTTNG_ERR_UNK;
ret = -1;
conn->session->id,
chunk);
if (!published_chunk) {
- char uuid_str[UUID_STR_LEN];
+ char uuid_str[LTTNG_UUID_STR_LEN];
lttng_uuid_to_str(conn->session->sessiond_uuid, uuid_str);
ERR("Failed to publish chunk: sessiond_uuid = %s, session_id = %" PRIu64 ", chunk_id = %" PRIu64,
conn->session->id,
msg->chunk_id);
ret = -1;
- reply_code = LTTNG_ERR_NOMEM;
- goto end;
+ reply_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ pthread_mutex_lock(&conn->session->lock);
+ if (conn->session->pending_closure_trace_chunk) {
+ /*
+ * Invalid; this means a second create_trace_chunk command was
+ * received before a close_trace_chunk.
+ */
+ ERR("Invalid trace chunk close command received; a trace chunk is already waiting for a trace chunk close command");
+ reply_code = LTTNG_ERR_INVALID_PROTOCOL;
+ ret = -1;
+ goto end_unlock_session;
+ }
+ conn->session->pending_closure_trace_chunk =
+ conn->session->current_trace_chunk;
+ conn->session->current_trace_chunk = published_chunk;
+ published_chunk = NULL;
+ if (!conn->session->pending_closure_trace_chunk) {
+ session->ongoing_rotation = false;
+ }
+end_unlock_session:
+ pthread_mutex_unlock(&conn->session->lock);
+end:
+ reply.ret_code = htobe32((uint32_t) reply_code);
+ send_ret = conn->sock->ops->sendmsg(conn->sock,
+ &reply,
+ sizeof(struct lttcomm_relayd_generic_reply),
+ 0);
+ if (send_ret < (ssize_t) sizeof(reply)) {
+ ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)",
+ send_ret);
+ ret = -1;
+ }
+end_no_reply:
+ lttng_trace_chunk_put(chunk);
+ lttng_trace_chunk_put(published_chunk);
+ return ret;
+}
+
+/*
+ * relay_close_trace_chunk: close a trace chunk
+ */
+static int relay_close_trace_chunk(const struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn,
+ const struct lttng_buffer_view *payload)
+{
+ int ret = 0, buf_ret;
+ ssize_t send_ret;
+ struct relay_session *session = conn->session;
+ struct lttcomm_relayd_close_trace_chunk *msg;
+ struct lttcomm_relayd_close_trace_chunk_reply reply = {};
+ struct lttng_buffer_view header_view;
+ struct lttng_trace_chunk *chunk = NULL;
+ enum lttng_error_code reply_code = LTTNG_OK;
+ enum lttng_trace_chunk_status chunk_status;
+ uint64_t chunk_id;
+ LTTNG_OPTIONAL(enum lttng_trace_chunk_command_type) close_command = {};
+ time_t close_timestamp;
+ char closed_trace_chunk_path[LTTNG_PATH_MAX];
+ size_t path_length = 0;
+ const char *chunk_name = NULL;
+ struct lttng_dynamic_buffer reply_payload;
+ const char *new_path;
+
+ lttng_dynamic_buffer_init(&reply_payload);
+
+ if (!session || !conn->version_check_done) {
+ ERR("Trying to close a trace chunk before version check");
+ ret = -1;
+ goto end_no_reply;
+ }
+
+ if (session->major == 2 && session->minor < 11) {
+ ERR("Chunk close command is unsupported before 2.11");
+ ret = -1;
+ goto end_no_reply;
+ }
+
+ header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg));
+ if (!header_view.data) {
+ ERR("Failed to receive payload of chunk close command");
+ ret = -1;
+ goto end_no_reply;
+ }
+
+ /* Convert to host endianness. */
+ msg = (typeof(msg)) header_view.data;
+ chunk_id = be64toh(msg->chunk_id);
+ close_timestamp = (time_t) be64toh(msg->close_timestamp);
+ close_command = (typeof(close_command)){
+ .value = be32toh(msg->close_command.value),
+ .is_set = msg->close_command.is_set,
+ };
+
+ chunk = sessiond_trace_chunk_registry_get_chunk(
+ sessiond_trace_chunk_registry,
+ conn->session->sessiond_uuid,
+ conn->session->id,
+ chunk_id);
+ if (!chunk) {
+ char uuid_str[LTTNG_UUID_STR_LEN];
+
+ lttng_uuid_to_str(conn->session->sessiond_uuid, uuid_str);
+ ERR("Failed to find chunk to close: sessiond_uuid = %s, session_id = %" PRIu64 ", chunk_id = %" PRIu64,
+ uuid_str,
+ conn->session->id,
+ msg->chunk_id);
+ ret = -1;
+ reply_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ pthread_mutex_lock(&session->lock);
+ if (close_command.is_set &&
+ close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE) {
+ /*
+ * Clear command. It is a protocol error to ask for a
+ * clear on a relay which does not allow it. Querying
+ * the configuration allows figuring out whether
+ * clearing is allowed before doing the clear.
+ */
+ if (!opt_allow_clear) {
+ ret = -1;
+ reply_code = LTTNG_ERR_INVALID_PROTOCOL;
+ goto end_unlock_session;
+ }
+ }
+ if (session->pending_closure_trace_chunk &&
+ session->pending_closure_trace_chunk != chunk) {
+ ERR("Trace chunk close command for session \"%s\" does not target the trace chunk pending closure",
+ session->session_name);
+ reply_code = LTTNG_ERR_INVALID_PROTOCOL;
+ ret = -1;
+ goto end_unlock_session;
+ }
+
+ if (session->current_trace_chunk && session->current_trace_chunk != chunk &&
+ !lttng_trace_chunk_get_name_overridden(session->current_trace_chunk)) {
+ if (close_command.is_set &&
+ close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE &&
+ !session->has_rotated) {
+ /* New chunk stays in session output directory. */
+ new_path = "";
+ } else {
+ /* Use chunk name for new chunk. */
+ new_path = NULL;
+ }
+ /* Rename new chunk path. */
+ chunk_status = lttng_trace_chunk_rename_path(session->current_trace_chunk,
+ new_path);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = -1;
+ goto end_unlock_session;
+ }
+ session->ongoing_rotation = false;
+ }
+ if ((!close_command.is_set ||
+ close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION) &&
+ !lttng_trace_chunk_get_name_overridden(chunk)) {
+ const char *old_path;
+
+ if (!session->has_rotated) {
+ old_path = "";
+ } else {
+ old_path = NULL;
+ }
+ /* We need to move back the .tmp_old_chunk to its rightful place. */
+ chunk_status = lttng_trace_chunk_rename_path(chunk, old_path);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = -1;
+ goto end_unlock_session;
+ }
+ }
+ chunk_status = lttng_trace_chunk_set_close_timestamp(
+ chunk, close_timestamp);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ERR("Failed to set trace chunk close timestamp");
+ ret = -1;
+ reply_code = LTTNG_ERR_UNK;
+ goto end_unlock_session;
+ }
+
+ if (close_command.is_set) {
+ chunk_status = lttng_trace_chunk_set_close_command(
+ chunk, close_command.value);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = -1;
+ reply_code = LTTNG_ERR_INVALID;
+ goto end_unlock_session;
+ }
+ }
+ chunk_status = lttng_trace_chunk_get_name(chunk, &chunk_name, NULL);
+ if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ERR("Failed to get chunk name");
+ ret = -1;
+ reply_code = LTTNG_ERR_UNK;
+ goto end_unlock_session;
+ }
+ if (!session->has_rotated && !session->snapshot) {
+ ret = lttng_strncpy(closed_trace_chunk_path,
+ session->output_path,
+ sizeof(closed_trace_chunk_path));
+ if (ret) {
+ ERR("Failed to send trace chunk path: path length of %zu bytes exceeds the maximal allowed length of %zu bytes",
+ strlen(session->output_path),
+ sizeof(closed_trace_chunk_path));
+ reply_code = LTTNG_ERR_NOMEM;
+ ret = -1;
+ goto end_unlock_session;
+ }
+ } else {
+ if (session->snapshot) {
+ ret = snprintf(closed_trace_chunk_path,
+ sizeof(closed_trace_chunk_path),
+ "%s/%s", session->output_path,
+ chunk_name);
+ } else {
+ ret = snprintf(closed_trace_chunk_path,
+ sizeof(closed_trace_chunk_path),
+ "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY
+ "/%s",
+ session->output_path, chunk_name);
+ }
+ if (ret < 0 || ret == sizeof(closed_trace_chunk_path)) {
+ ERR("Failed to format closed trace chunk resulting path");
+ reply_code = ret < 0 ? LTTNG_ERR_UNK : LTTNG_ERR_NOMEM;
+ ret = -1;
+ goto end_unlock_session;
+ }
+ }
+ if (close_command.is_set &&
+ close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED) {
+ session->has_rotated = true;
+ }
+ DBG("Reply chunk path on close: %s", closed_trace_chunk_path);
+ path_length = strlen(closed_trace_chunk_path) + 1;
+ if (path_length > UINT32_MAX) {
+ ERR("Closed trace chunk path exceeds the maximal length allowed by the protocol");
+ ret = -1;
+ reply_code = LTTNG_ERR_INVALID_PROTOCOL;
+ goto end_unlock_session;
}
- pthread_mutex_lock(&conn->session->lock);
- lttng_trace_chunk_put(conn->session->current_trace_chunk);
- conn->session->current_trace_chunk = published_chunk;
- pthread_mutex_unlock(&conn->session->lock);
- published_chunk = NULL;
+ if (session->current_trace_chunk == chunk) {
+ /*
+ * After a trace chunk close command, no new streams
+ * referencing the chunk may be created. Hence, on the
+ * event that no new trace chunk have been created for
+ * the session, the reference to the current trace chunk
+ * is released in order to allow it to be reclaimed when
+ * the last stream releases its reference to it.
+ */
+ lttng_trace_chunk_put(session->current_trace_chunk);
+ session->current_trace_chunk = NULL;
+ }
+ lttng_trace_chunk_put(session->pending_closure_trace_chunk);
+ session->pending_closure_trace_chunk = NULL;
+end_unlock_session:
+ pthread_mutex_unlock(&session->lock);
end:
- reply.ret_code = htobe32((uint32_t) reply_code);
+ reply.generic.ret_code = htobe32((uint32_t) reply_code);
+ reply.path_length = htobe32((uint32_t) path_length);
+ buf_ret = lttng_dynamic_buffer_append(
+ &reply_payload, &reply, sizeof(reply));
+ if (buf_ret) {
+ ERR("Failed to append \"close trace chunk\" command reply header to payload buffer");
+ goto end_no_reply;
+ }
+
+ if (reply_code == LTTNG_OK) {
+ buf_ret = lttng_dynamic_buffer_append(&reply_payload,
+ closed_trace_chunk_path, path_length);
+ if (buf_ret) {
+ ERR("Failed to append \"close trace chunk\" command reply path to payload buffer");
+ goto end_no_reply;
+ }
+ }
+
send_ret = conn->sock->ops->sendmsg(conn->sock,
- &reply,
- sizeof(struct lttcomm_relayd_generic_reply),
+ reply_payload.data,
+ reply_payload.size,
0);
- if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)",
- send_ret);
+ if (send_ret < reply_payload.size) {
+ ERR("Failed to send \"close trace chunk\" command reply of %zu bytes (ret = %zd)",
+ reply_payload.size, send_ret);
ret = -1;
+ goto end_no_reply;
}
end_no_reply:
lttng_trace_chunk_put(chunk);
- lttng_trace_chunk_put(published_chunk);
- lttng_directory_handle_fini(&session_output);
+ lttng_dynamic_buffer_reset(&reply_payload);
return ret;
}
/*
- * relay_close_trace_chunk: close a trace chunk
+ * relay_trace_chunk_exists: check if a trace chunk exists
*/
-static int relay_close_trace_chunk(const struct lttcomm_relayd_hdr *recv_hdr,
+static int relay_trace_chunk_exists(const struct lttcomm_relayd_hdr *recv_hdr,
struct relay_connection *conn,
const struct lttng_buffer_view *payload)
{
int ret = 0;
ssize_t send_ret;
struct relay_session *session = conn->session;
- struct lttcomm_relayd_close_trace_chunk *msg;
- struct lttcomm_relayd_generic_reply reply = {};
+ struct lttcomm_relayd_trace_chunk_exists *msg;
+ struct lttcomm_relayd_trace_chunk_exists_reply reply = {};
struct lttng_buffer_view header_view;
- struct lttng_trace_chunk *chunk = NULL;
- enum lttng_error_code reply_code = LTTNG_OK;
- enum lttng_trace_chunk_status chunk_status;
uint64_t chunk_id;
- LTTNG_OPTIONAL(enum lttng_trace_chunk_command_type) close_command;
- time_t close_timestamp;
+ bool chunk_exists;
if (!session || !conn->version_check_done) {
- ERR("Trying to close a trace chunk before version check");
+ ERR("Trying to check for the existance of a trace chunk before version check");
ret = -1;
goto end_no_reply;
}
if (session->major == 2 && session->minor < 11) {
- ERR("Chunk close command is unsupported before 2.11");
+ ERR("Chunk exists command is unsupported before 2.11");
ret = -1;
goto end_no_reply;
}
header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg));
if (!header_view.data) {
- ERR("Failed to receive payload of chunk close command");
+ ERR("Failed to receive payload of chunk exists command");
ret = -1;
goto end_no_reply;
}
/* Convert to host endianness. */
msg = (typeof(msg)) header_view.data;
chunk_id = be64toh(msg->chunk_id);
- close_timestamp = (time_t) be64toh(msg->close_timestamp);
- close_command = (typeof(close_command)){
- .value = be32toh(msg->close_command.value),
- .is_set = msg->close_command.is_set,
- };
- chunk = sessiond_trace_chunk_registry_get_chunk(
+ ret = sessiond_trace_chunk_registry_chunk_exists(
sessiond_trace_chunk_registry,
conn->session->sessiond_uuid,
conn->session->id,
- chunk_id);
- if (!chunk) {
- char uuid_str[UUID_STR_LEN];
-
- lttng_uuid_to_str(conn->session->sessiond_uuid, uuid_str);
- ERR("Failed to find chunk to close: sessiond_uuid = %s, session_id = %" PRIu64 ", chunk_id = %" PRIu64,
- uuid_str,
- conn->session->id,
- msg->chunk_id);
+ chunk_id, &chunk_exists);
+ /*
+ * If ret is not 0, send the reply and report the error to the caller.
+ * It is a protocol (or internal) error and the session/connection
+ * should be torn down.
+ */
+ reply = (typeof(reply)){
+ .generic.ret_code = htobe32((uint32_t)
+ (ret == 0 ? LTTNG_OK : LTTNG_ERR_INVALID_PROTOCOL)),
+ .trace_chunk_exists = ret == 0 ? chunk_exists : 0,
+ };
+ send_ret = conn->sock->ops->sendmsg(
+ conn->sock, &reply, sizeof(reply), 0);
+ if (send_ret < (ssize_t) sizeof(reply)) {
+ ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)",
+ send_ret);
ret = -1;
- reply_code = LTTNG_ERR_NOMEM;
- goto end;
}
+end_no_reply:
+ return ret;
+}
- chunk_status = lttng_trace_chunk_set_close_timestamp(
- chunk, close_timestamp);
- if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
- ERR("Failed to set trace chunk close timestamp");
+/*
+ * relay_get_configuration: query whether feature is available
+ */
+static int relay_get_configuration(const struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn,
+ const struct lttng_buffer_view *payload)
+{
+ int ret = 0;
+ ssize_t send_ret;
+ struct lttcomm_relayd_get_configuration *msg;
+ struct lttcomm_relayd_get_configuration_reply reply = {};
+ struct lttng_buffer_view header_view;
+ uint64_t query_flags = 0;
+ uint64_t result_flags = 0;
+
+ header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg));
+ if (!header_view.data) {
+ ERR("Failed to receive payload of chunk close command");
ret = -1;
- reply_code = LTTNG_ERR_UNK;
- goto end;
+ goto end_no_reply;
}
- if (close_command.is_set) {
- chunk_status = lttng_trace_chunk_set_close_command(
- chunk, close_command.value);
- if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
- ret = -1;
- reply_code = LTTNG_ERR_INVALID;
- goto end;
- }
- }
+ /* Convert to host endianness. */
+ msg = (typeof(msg)) header_view.data;
+ query_flags = be64toh(msg->query_flags);
-end:
- reply.ret_code = htobe32((uint32_t) reply_code);
- send_ret = conn->sock->ops->sendmsg(conn->sock,
- &reply,
- sizeof(struct lttcomm_relayd_generic_reply),
- 0);
+ if (query_flags) {
+ ret = LTTNG_ERR_INVALID_PROTOCOL;
+ goto reply;
+ }
+ if (opt_allow_clear) {
+ result_flags |= LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED;
+ }
+ ret = 0;
+reply:
+ reply = (typeof(reply)){
+ .generic.ret_code = htobe32((uint32_t)
+ (ret == 0 ? LTTNG_OK : LTTNG_ERR_INVALID_PROTOCOL)),
+ .relayd_configuration_flags = htobe64(result_flags),
+ };
+ send_ret = conn->sock->ops->sendmsg(
+ conn->sock, &reply, sizeof(reply), 0);
if (send_ret < (ssize_t) sizeof(reply)) {
- ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)",
+ ERR("Failed to send \"get configuration\" command reply (ret = %zd)",
send_ret);
ret = -1;
}
end_no_reply:
- lttng_trace_chunk_put(chunk);
return ret;
}
DBG_CMD("RELAYD_RESET_METADATA", conn);
ret = relay_reset_metadata(header, conn, payload);
break;
- case RELAYD_ROTATE_STREAM:
- DBG_CMD("RELAYD_ROTATE_STREAM", conn);
- ret = relay_rotate_session_stream(header, conn, payload);
+ case RELAYD_ROTATE_STREAMS:
+ DBG_CMD("RELAYD_ROTATE_STREAMS", conn);
+ ret = relay_rotate_session_streams(header, conn, payload);
break;
case RELAYD_CREATE_TRACE_CHUNK:
DBG_CMD("RELAYD_CREATE_TRACE_CHUNK", conn);
DBG_CMD("RELAYD_CLOSE_TRACE_CHUNK", conn);
ret = relay_close_trace_chunk(header, conn, payload);
break;
+ case RELAYD_TRACE_CHUNK_EXISTS:
+ DBG_CMD("RELAYD_TRACE_CHUNK_EXISTS", conn);
+ ret = relay_trace_chunk_exists(header, conn, payload);
+ break;
+ case RELAYD_GET_CONFIGURATION:
+ DBG_CMD("RELAYD_GET_CONFIGURATION", conn);
+ ret = relay_get_configuration(header, conn, payload);
+ break;
case RELAYD_UPDATE_SYNC_INFO:
default:
ERR("Received unknown command (%u)", header->cmd);
return status;
}
-/*
- * Handle index for a data stream.
- *
- * Called with the stream lock held.
- *
- * Return 0 on success else a negative value.
- */
-static int handle_index_data(struct relay_stream *stream, uint64_t net_seq_num,
- bool rotate_index, bool *flushed, uint64_t total_size)
-{
- int ret = 0;
- uint64_t data_offset;
- struct relay_index *index;
-
- /* Get data offset because we are about to update the index. */
- data_offset = htobe64(stream->tracefile_size_current);
-
- DBG("handle_index_data: stream %" PRIu64 " net_seq_num %" PRIu64 " data offset %" PRIu64,
- stream->stream_handle, net_seq_num, stream->tracefile_size_current);
-
- /*
- * Lookup for an existing index for that stream id/sequence
- * number. If it exists, the control thread has already received the
- * data for it, thus we need to write it to disk.
- */
- index = relay_index_get_by_id_or_create(stream, net_seq_num);
- if (!index) {
- ret = -1;
- goto end;
- }
-
- if (rotate_index || !stream->index_file) {
- const char *stream_path;
-
- /*
- * The data connection creates the stream's first index file.
- *
- * This can happen _after_ a ROTATE_STREAM command. In
- * other words, the data of the first packet of this stream
- * can be received after a ROTATE_STREAM command.
- *
- * The ROTATE_STREAM command changes the stream's path_name
- * to point to the "next" chunk. If a rotation is pending for
- * this stream, as indicated by "rotate_at_seq_num != -1ULL",
- * it means that we are still receiving data that belongs in the
- * stream's former path.
- *
- * In this very specific case, we must ensure that the index
- * file is created in the streams's former path,
- * "prev_path_name".
- *
- * All other rotations beyond the first one are not affected
- * by this problem since the actual rotation operation creates
- * the new chunk's index file.
- */
- stream_path = stream->rotate_at_seq_num == -1ULL ?
- stream->path_name:
- stream->prev_path_name;
-
- ret = create_rotate_index_file(stream, stream_path);
- if (ret < 0) {
- ERR("Failed to rotate index");
- /* Put self-ref for this index due to error. */
- relay_index_put(index);
- index = NULL;
- goto end;
- }
- }
-
- if (relay_index_set_file(index, stream->index_file, data_offset)) {
- ret = -1;
- /* Put self-ref for this index due to error. */
- relay_index_put(index);
- index = NULL;
- goto end;
- }
-
- ret = relay_index_try_flush(index);
- if (ret == 0) {
- tracefile_array_commit_seq(stream->tfa);
- stream->index_received_seqcount++;
- *flushed = true;
- } else if (ret > 0) {
- index->total_size = total_size;
- /* No flush. */
- ret = 0;
- } else {
- /*
- * ret < 0
- *
- * relay_index_try_flush is responsible for the self-reference
- * put of the index object on error.
- */
- ERR("relay_index_try_flush error %d", ret);
- ret = -1;
- }
-end:
- return ret;
-}
-
static enum relay_connection_status relay_process_data_receive_header(
struct relay_connection *conn)
{
}
pthread_mutex_lock(&stream->lock);
-
- /* Check if a rotation is needed. */
- if (stream->tracefile_size > 0 &&
- (stream->tracefile_size_current + header.data_size) >
- stream->tracefile_size) {
- uint64_t old_id, new_id;
-
- old_id = tracefile_array_get_file_index_head(stream->tfa);
- tracefile_array_file_rotate(stream->tfa);
-
- /* new_id is updated by utils_rotate_stream_file. */
- new_id = old_id;
-
- ret = utils_rotate_stream_file(stream->path_name,
- stream->channel_name, stream->tracefile_size,
- stream->tracefile_count, -1,
- -1, stream->stream_fd->fd,
- &new_id, &stream->stream_fd->fd);
- if (ret < 0) {
- ERR("Failed to rotate stream output file");
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end_stream_unlock;
- }
-
- /*
- * Reset current size because we just performed a stream
- * rotation.
- */
- stream->tracefile_size_current = 0;
- conn->protocol.data.state.receive_payload.rotate_index = true;
+ /* Prepare stream for the reception of a new packet. */
+ ret = stream_init_packet(stream, header.data_size,
+ &conn->protocol.data.state.receive_payload.rotate_index);
+ pthread_mutex_unlock(&stream->lock);
+ if (ret) {
+ ERR("Failed to rotate stream output file");
+ status = RELAY_CONNECTION_STATUS_ERROR;
+ goto end_stream_unlock;
}
end_stream_unlock:
- pthread_mutex_unlock(&stream->lock);
stream_put(stream);
end:
return status;
* - the on-stack data buffer
*/
while (left_to_receive > 0 && !partial_recv) {
- ssize_t write_ret;
size_t recv_size = min(left_to_receive, chunk_size);
+ struct lttng_buffer_view packet_chunk;
ret = conn->sock->ops->recvmsg(conn->sock, data_buffer,
recv_size, MSG_DONTWAIT);
* consumed.
*/
partial_recv = true;
+ recv_size = ret;
}
- recv_size = ret;
+ packet_chunk = lttng_buffer_view_init(data_buffer,
+ 0, recv_size);
+ assert(packet_chunk.data);
- /* Write data to stream output fd. */
- write_ret = lttng_write(stream->stream_fd->fd, data_buffer,
- recv_size);
- if (write_ret < (ssize_t) recv_size) {
+ ret = stream_write(stream, &packet_chunk, 0);
+ if (ret) {
ERR("Relay error writing data to file");
status = RELAY_CONNECTION_STATUS_ERROR;
goto end_stream_unlock;
left_to_receive -= recv_size;
state->received += recv_size;
state->left_to_receive = left_to_receive;
-
- DBG2("Relay wrote %zd bytes to tracefile for stream id %" PRIu64,
- write_ret, stream->stream_handle);
}
if (state->left_to_receive > 0) {
goto end_stream_unlock;
}
- ret = write_padding_to_file(stream->stream_fd->fd,
- state->header.padding_size);
- if ((int64_t) ret < (int64_t) state->header.padding_size) {
- ERR("write_padding_to_file: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d",
- stream->stream_handle,
- state->header.net_seq_num, ret);
+ ret = stream_write(stream, NULL, state->header.padding_size);
+ if (ret) {
status = RELAY_CONNECTION_STATUS_ERROR;
goto end_stream_unlock;
}
-
if (session_streams_have_index(session)) {
- ret = handle_index_data(stream, state->header.net_seq_num,
- state->rotate_index, &index_flushed, state->header.data_size + state->header.padding_size);
+ ret = stream_update_index(stream, state->header.net_seq_num,
+ state->rotate_index, &index_flushed,
+ state->header.data_size + state->header.padding_size);
if (ret < 0) {
- ERR("handle_index_data: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d",
+ ERR("Failed to update index: stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d",
stream->stream_handle,
state->header.net_seq_num, ret);
status = RELAY_CONNECTION_STATUS_ERROR;
}
}
- stream->tracefile_size_current += state->header.data_size +
- state->header.padding_size;
-
if (stream->prev_data_seq == -1ULL) {
new_stream = true;
}
- if (index_flushed) {
- stream->pos_after_last_complete_data_index =
- stream->tracefile_size_current;
- stream->prev_index_seq = state->header.net_seq_num;
- ret = try_rotate_stream_index(stream);
- if (ret < 0) {
- goto end_stream_unlock;
- }
- }
- stream->prev_data_seq = state->header.net_seq_num;
+ ret = stream_complete_packet(stream, state->header.data_size +
+ state->header.padding_size, state->header.net_seq_num,
+ index_flushed);
+ if (ret) {
+ status = RELAY_CONNECTION_STATUS_ERROR;
+ goto end_stream_unlock;
+ }
/*
* Resetting the protocol state (to RECEIVE_HEADER) will trash the
connection_reset_protocol_state(conn);
state = NULL;
- ret = try_rotate_stream_data(stream);
- if (ret < 0) {
- status = RELAY_CONNECTION_STATUS_ERROR;
- goto end_stream_unlock;
- }
-
end_stream_unlock:
close_requested = stream->close_requested;
pthread_mutex_unlock(&stream->lock);
(void) lttng_poll_del(events, pollfd);
- ret = close(pollfd);
+ ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, &pollfd, 1,
+ fd_tracker_util_close_fd, NULL);
if (ret < 0) {
ERR("Closing pollfd %d", pollfd);
}
goto relay_connections_ht_error;
}
- ret = create_thread_poll_set(&events, 2);
+ ret = create_named_thread_poll_set(&events, 2, "Worker thread epoll");
if (ret < 0) {
goto error_poll_create;
}
if (ret < 0) {
goto error;
}
- lttng_poll_add(&events, conn->sock->fd,
+ ret = lttng_poll_add(&events,
+ conn->sock->fd,
LPOLLIN | LPOLLRDHUP);
+ if (ret) {
+ ERR("Failed to add new connection file descriptor to poll set");
+ goto error;
+ }
connection_ht_add(relay_connections_ht, conn);
DBG("Connection socket %d added", conn->sock->fd);
} else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) {
}
rcu_read_unlock();
- lttng_poll_clean(&events);
+ (void) fd_tracker_util_poll_clean(the_fd_tracker, &events);
error_poll_create:
lttng_ht_destroy(relay_connections_ht);
relay_connections_ht_error:
/* Close relay conn pipes */
- utils_close_pipe(relay_conn_pipe);
+ (void) fd_tracker_util_pipe_close(the_fd_tracker,
+ relay_conn_pipe);
if (err) {
DBG("Thread exited with error");
}
*/
static int create_relay_conn_pipe(void)
{
- int ret;
+ return fd_tracker_util_pipe_open_cloexec(the_fd_tracker,
+ "Relayd connection pipe", relay_conn_pipe);
+}
- ret = utils_create_pipe_cloexec(relay_conn_pipe);
+static int stdio_open(void *data, int *fds)
+{
+ fds[0] = fileno(stdout);
+ fds[1] = fileno(stderr);
+ return 0;
+}
- return ret;
+static int track_stdio(void)
+{
+ int fds[2];
+ const char *names[] = { "stdout", "stderr" };
+
+ return fd_tracker_open_unsuspendable_fd(the_fd_tracker, fds,
+ names, 2, stdio_open, NULL);
}
/*
*/
int main(int argc, char **argv)
{
+ bool thread_is_rcu_registered = false;
int ret = 0, retval = 0;
void *status;
+ char *unlinked_file_directory_path = NULL, *output_path = NULL;
+
+ /* Parse environment variables */
+ ret = parse_env_options();
+ if (ret) {
+ retval = -1;
+ goto exit_options;
+ }
- /* Parse arguments */
+ /*
+ * Parse arguments.
+ * Command line arguments overwrite environment.
+ */
progname = argv[0];
if (set_options(argc, argv)) {
retval = -1;
goto exit_options;
}
+ relayd_config_log();
+
+ if (opt_print_version) {
+ print_version();
+ retval = 0;
+ goto exit_options;
+ }
+
+ ret = fclose(stdin);
+ if (ret) {
+ PERROR("Failed to close stdin");
+ goto exit_options;
+ }
+
+ DBG("Clear command %s", opt_allow_clear ? "allowed" : "disallowed");
+
/* Try to create directory if -o, --output is specified. */
if (opt_output_path) {
if (*opt_output_path != '/') {
/* Daemonize */
if (opt_daemon || opt_background) {
- int i;
-
ret = lttng_daemonize(&child_ppid, &recv_child_signal,
!opt_background);
if (ret < 0) {
retval = -1;
goto exit_options;
}
+ }
- /*
- * We are in the child. Make sure all other file
- * descriptors are closed, in case we are called with
- * more opened file descriptors than the standard ones.
- */
- for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) {
- (void) close(i);
+ if (opt_working_directory) {
+ ret = utils_change_working_directory(opt_working_directory);
+ if (ret) {
+ /* All errors are already logged. */
+ goto exit_options;
}
}
if (!sessiond_trace_chunk_registry) {
ERR("Failed to initialize session daemon trace chunk registry");
retval = -1;
- goto exit_sessiond_trace_chunk_registry;
+ goto exit_options;
+ }
+
+ /*
+ * The RCU thread registration (and use, through the fd-tracker's
+ * creation) is done after the daemonization to allow us to not
+ * deal with liburcu's fork() management as the call RCU needs to
+ * be restored.
+ */
+ rcu_register_thread();
+ thread_is_rcu_registered = true;
+
+ output_path = create_output_path("");
+ if (!output_path) {
+ ERR("Failed to get output path");
+ retval = -1;
+ goto exit_options;
+ }
+ ret = asprintf(&unlinked_file_directory_path, "%s/%s", output_path,
+ DEFAULT_UNLINKED_FILES_DIRECTORY);
+ free(output_path);
+ if (ret < 0) {
+ ERR("Failed to format unlinked file directory path");
+ retval = -1;
+ goto exit_options;
+ }
+ the_fd_tracker = fd_tracker_create(
+ unlinked_file_directory_path, lttng_opt_fd_pool_size);
+ free(unlinked_file_directory_path);
+ if (!the_fd_tracker) {
+ retval = -1;
+ goto exit_options;
+ }
+
+ ret = track_stdio();
+ if (ret) {
+ retval = -1;
+ goto exit_options;
}
/* Initialize thread health monitoring */
if (!health_relayd) {
PERROR("health_app_create error");
retval = -1;
- goto exit_health_app_create;
+ goto exit_options;
}
/* Create thread quit pipe */
if (init_thread_quit_pipe()) {
retval = -1;
- goto exit_init_data;
+ goto exit_options;
}
/* Setup the thread apps communication pipe. */
if (create_relay_conn_pipe()) {
retval = -1;
- goto exit_init_data;
+ goto exit_options;
}
/* Init relay command queue. */
sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64);
if (!sessions_ht) {
retval = -1;
- goto exit_init_data;
+ goto exit_options;
}
/* tables of streams indexed by stream ID */
relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64);
if (!relay_streams_ht) {
retval = -1;
- goto exit_init_data;
+ goto exit_options;
}
/* tables of streams indexed by stream ID */
viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64);
if (!viewer_streams_ht) {
retval = -1;
- goto exit_init_data;
+ goto exit_options;
}
- ret = utils_create_pipe(health_quit_pipe);
+ ret = init_health_quit_pipe();
if (ret) {
retval = -1;
- goto exit_health_quit_pipe;
+ goto exit_options;
}
/* Create thread to manage the client socket */
errno = ret;
PERROR("pthread_create health");
retval = -1;
- goto exit_health_thread;
+ goto exit_options;
}
/* Setup the dispatcher thread */
PERROR("pthread_join health_thread");
retval = -1;
}
-exit_health_thread:
-
- utils_close_pipe(health_quit_pipe);
-exit_health_quit_pipe:
-
-exit_init_data:
- health_app_destroy(health_relayd);
- sessiond_trace_chunk_registry_destroy(sessiond_trace_chunk_registry);
-exit_health_app_create:
-exit_sessiond_trace_chunk_registry:
exit_options:
/*
* Wait for all pending call_rcu work to complete before tearing
/* Ensure all prior call_rcu are done. */
rcu_barrier();
+ if (thread_is_rcu_registered) {
+ rcu_unregister_thread();
+ }
+
if (!retval) {
exit(EXIT_SUCCESS);
} else {
projects / lttng-tools.git / blobdiff