/*
* Copyright (C) 2017 - Julien Desfossez <jdesfossez@efficios.com>
+ * Copyright (C) 2018 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License, version 2 only, as
#include <signal.h>
#include <inttypes.h>
+#include <lttng/notification/channel-internal.h>
+#include <lttng/rotate-internal.h>
+
#include "session.h"
#include "rotate.h"
#include "rotation-thread.h"
#include "health-sessiond.h"
#include "cmd.h"
#include "utils.h"
+#include "notification-thread-commands.h"
#include <urcu.h>
#include <urcu/list.h>
#include <urcu/rculfhash.h>
-unsigned long hash_channel_key(struct rotation_channel_key *key)
-{
- return hash_key_u64(&key->key, lttng_ht_seed) ^ hash_key_ulong(
- (void *) (unsigned long) key->domain, lttng_ht_seed);
-}
-
/* The session's lock must be held by the caller. */
static
int session_rename_chunk(struct ltt_session *session, char *current_path,
int ret;
char current_full_path[LTTNG_PATH_MAX], new_full_path[LTTNG_PATH_MAX];
- /* Current domain path: <session>/kernel */
if (session->net_handle > 0) {
- ret = snprintf(current_full_path, sizeof(current_full_path), "%s/%s",
- consumer->dst.net.base_dir, consumer->subdir);
+ /*
+ * Current domain path:
+ * HOSTNAME/{SESSION-[TIMESTAMP], USER_DIRECTORY}/DOMAIN
+ */
+ ret = snprintf(current_full_path, sizeof(current_full_path),
+ "%s%s",
+ consumer->dst.net.base_dir,
+ consumer->domain_subdir);
if (ret < 0 || ret >= sizeof(current_full_path)) {
ERR("Failed to initialize current full path while renaming first rotation chunk of session \"%s\"",
session->name);
- ret = -1;
+ ret = -LTTNG_ERR_UNK;
goto error;
}
} else {
- ret = snprintf(current_full_path, sizeof(current_full_path), "%s/%s",
- consumer->dst.session_root_path, consumer->subdir);
+ /*
+ * Current domain path:
+ * SESSION_OUTPUT_PATH/DOMAIN
+ */
+ ret = snprintf(current_full_path, sizeof(current_full_path),
+ "%s/%s",
+ consumer->dst.session_root_path,
+ consumer->domain_subdir);
if (ret < 0 || ret >= sizeof(current_full_path)) {
ERR("Failed to initialize current full path while renaming first rotation chunk of session \"%s\"",
session->name);
- ret = -1;
+ ret = -LTTNG_ERR_UNK;
goto error;
}
}
- /* New domain path: <session>/<start-date>-<end-date>-<rotate-count>/kernel */
+ /*
+ * New domain path:
+ * SESSION_BASE_PATH/<START_TS>_<END_TS>-INDEX/DOMAIN
+ */
ret = snprintf(new_full_path, sizeof(new_full_path), "%s/%s",
- new_path, consumer->subdir);
+ new_path, consumer->domain_subdir);
if (ret < 0 || ret >= sizeof(new_full_path)) {
ERR("Failed to initialize new full path while renaming first rotation chunk of session \"%s\"",
session->name);
- ret = -1;
+ ret = -LTTNG_ERR_UNK;
goto error;
}
- /*
- * Move the per-domain fcurrenter inside the first rotation
- * fcurrenter.
- */
+ /* Move the per-domain inside the first rotation chunk path. */
ret = session_rename_chunk(session, current_full_path, new_full_path);
if (ret < 0) {
ret = -LTTNG_ERR_UNK;
*
* Returns 0 on success, a negative value on error.
*/
-int rename_complete_chunk(struct ltt_session *session, time_t ts)
+int rename_completed_chunk(struct ltt_session *session, time_t end_ts)
{
- struct tm *timeinfo;
- char datetime[16], start_datetime[16];
- char new_path[LTTNG_PATH_MAX];
int ret;
size_t strf_ret;
+ struct tm *timeinfo;
+ char new_path[LTTNG_PATH_MAX];
+ char start_datetime[21], end_datetime[21];
DBG("Renaming completed chunk for session %s", session->name);
- timeinfo = localtime(&ts);
+
+ /* Format chunk start time. */
+ timeinfo = localtime(&session->last_chunk_start_ts);
if (!timeinfo) {
- ERR("Failed to retrieve local time while renaming completed chunk");
+ ERR("Failed to separate local time while renaming completed chunk");
ret = -1;
goto end;
}
- strf_ret = strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S",
- timeinfo);
+ strf_ret = strftime(start_datetime, sizeof(start_datetime),
+ "%Y%m%dT%H%M%S%z", timeinfo);
if (strf_ret == 0) {
ERR("Failed to format timestamp while renaming completed session chunk");
ret = -1;
goto end;
}
- if (session->rotate_count == 1) {
- char start_time[16];
-
- timeinfo = localtime(&session->last_chunk_start_ts);
- if (!timeinfo) {
- ERR("Failed to retrieve local time while renaming completed chunk");
- ret = -1;
- goto end;
- }
+ /* Format chunk end time. */
+ timeinfo = localtime(&end_ts);
+ if (!timeinfo) {
+ ERR("Failed to parse time while renaming completed chunk");
+ ret = -1;
+ goto end;
+ }
+ strf_ret = strftime(end_datetime, sizeof(end_datetime),
+ "%Y%m%dT%H%M%S%z", timeinfo);
+ if (strf_ret == 0) {
+ ERR("Failed to format timestamp while renaming completed session chunk");
+ ret = -1;
+ goto end;
+ }
- strf_ret = strftime(start_time, sizeof(start_time),
- "%Y%m%d-%H%M%S", timeinfo);
- if (strf_ret == 0) {
- ERR("Failed to format timestamp while renaming completed session chunk");
- ret = -1;
- goto end;
- }
+ /* Format completed chunk's path. */
+ ret = snprintf(new_path, sizeof(new_path), "%s/archives/%s-%s-%" PRIu64,
+ session_get_base_path(session),
+ start_datetime, end_datetime,
+ session->current_archive_id);
+ if (ret < 0 || ret >= sizeof(new_path)) {
+ ERR("Failed to format new chunk path while renaming chunk of session \"%s\"",
+ session->name);
+ ret = -1;
+ goto error;
+ }
+ if (session->current_archive_id == 1) {
/*
* On the first rotation, the current_rotate_path is the
* session_root_path, so we need to create the chunk folder
* and move the domain-specific folders inside it.
*/
- ret = snprintf(new_path, sizeof(new_path), "%s/%s-%s-%" PRIu64,
- session->rotation_chunk.current_rotate_path,
- start_time,
- datetime, session->rotate_count);
- if (ret < 0 || ret >= sizeof(new_path)) {
- ERR("Failed to format new chunk path while renaming session \"%s\"'s first chunk",
- session->name);
- ret = -1;
- goto end;
- }
-
if (session->kernel_session) {
ret = rename_first_chunk(session,
session->kernel_session->consumer,
new_path);
if (ret) {
- ERR("Failed to rename kernel session trace folder to %s", new_path);
+ ERR("Failed to rename kernel session trace folder to \"%s\"", new_path);
/*
* This is not a fatal error for the rotation
* thread, we just need to inform the client
session->ust_session->consumer,
new_path);
if (ret) {
- ERR("Failed to rename userspace session trace folder to %s", new_path);
+ ERR("Failed to rename userspace session trace folder to \"%s\"", new_path);
ret = 0;
goto error;
}
* After the first rotation, all the trace data is already in
* its own chunk folder, we just need to append the suffix.
*/
- /* Recreate the session->rotation_chunk.current_rotate_path */
- timeinfo = localtime(&session->last_chunk_start_ts);
- if (!timeinfo) {
- ERR("Failed to retrieve local time while renaming completed chunk");
- ret = -1;
- goto end;
- }
- strf_ret = strftime(start_datetime, sizeof(start_datetime), "%Y%m%d-%H%M%S", timeinfo);
- if (!strf_ret) {
- ERR("Failed to format timestamp while renaming completed session chunk");
- ret = -1;
- goto end;
- }
- ret = snprintf(new_path, sizeof(new_path), "%s/%s-%s-%" PRIu64,
- session_get_base_path(session),
- start_datetime,
- datetime, session->rotate_count);
- if (ret < 0 || ret >= sizeof(new_path)) {
- ERR("Failed to format new chunk path while renaming chunk of session \"%s\"",
- session->name);
- ret = -1;
- goto error;
- }
ret = session_rename_chunk(session,
session->rotation_chunk.current_rotate_path,
new_path);
if (ret) {
- ERR("Failed to rename session trace folder from %s to %s",
+ ERR("Failed to rename session trace folder from \"%s\" to \"%s\"",
session->rotation_chunk.current_rotate_path,
new_path);
ret = 0;
goto end;
error:
- session->rotation_status = LTTNG_ROTATION_STATUS_ERROR;
+ session->rotation_state = LTTNG_ROTATION_STATE_ERROR;
+end:
+ return ret;
+}
+
+int rename_active_chunk(struct ltt_session *session)
+{
+ int ret;
+
+ session->current_archive_id++;
+
+ /*
+ * The currently active tracing path is now the folder we
+ * want to rename.
+ */
+ ret = lttng_strncpy(session->rotation_chunk.current_rotate_path,
+ session->rotation_chunk.active_tracing_path,
+ sizeof(session->rotation_chunk.current_rotate_path));
+ if (ret) {
+ ERR("Failed to copy active tracing path");
+ goto end;
+ }
+
+ ret = rename_completed_chunk(session, time(NULL));
+ if (ret < 0) {
+ ERR("Failed to rename current rotation's path");
+ goto end;
+ }
+
+ /*
+ * We just renamed, the folder, we didn't do an actual rotation, so
+ * the active tracing path is now the renamed folder and we have to
+ * restore the rotate count.
+ */
+ ret = lttng_strncpy(session->rotation_chunk.active_tracing_path,
+ session->rotation_chunk.current_rotate_path,
+ sizeof(session->rotation_chunk.active_tracing_path));
+ if (ret) {
+ ERR("Failed to rename active session chunk tracing path");
+ goto end;
+ }
+end:
+ session->current_archive_id--;
+ return ret;
+}
+
+int subscribe_session_consumed_size_rotation(struct ltt_session *session, uint64_t size,
+ struct notification_thread_handle *notification_thread_handle)
+{
+ int ret;
+ enum lttng_condition_status condition_status;
+ enum lttng_notification_channel_status nc_status;
+ struct lttng_action *action;
+
+ session->rotate_condition = lttng_condition_session_consumed_size_create();
+ if (!session->rotate_condition) {
+ ERR("Failed to create session consumed size condition object");
+ ret = -1;
+ goto end;
+ }
+
+ condition_status = lttng_condition_session_consumed_size_set_threshold(
+ session->rotate_condition, size);
+ if (condition_status != LTTNG_CONDITION_STATUS_OK) {
+ ERR("Could not set session consumed size condition threshold (size = %" PRIu64 ")",
+ size);
+ ret = -1;
+ goto end;
+ }
+
+ condition_status =
+ lttng_condition_session_consumed_size_set_session_name(
+ session->rotate_condition, session->name);
+ if (condition_status != LTTNG_CONDITION_STATUS_OK) {
+ ERR("Could not set session consumed size condition session name (name = %s)",
+ session->name);
+ ret = -1;
+ goto end;
+ }
+
+ action = lttng_action_notify_create();
+ if (!action) {
+ ERR("Could not create notify action");
+ ret = -1;
+ goto end;
+ }
+
+ session->rotate_trigger = lttng_trigger_create(session->rotate_condition,
+ action);
+ if (!session->rotate_trigger) {
+ ERR("Could not create size-based rotation trigger");
+ ret = -1;
+ goto end;
+ }
+
+ nc_status = lttng_notification_channel_subscribe(
+ rotate_notification_channel, session->rotate_condition);
+ if (nc_status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) {
+ ERR("Could not subscribe to session consumed size notification");
+ ret = -1;
+ goto end;
+ }
+
+ ret = notification_thread_command_register_trigger(
+ notification_thread_handle, session->rotate_trigger);
+ if (ret < 0 && ret != -LTTNG_ERR_TRIGGER_EXISTS) {
+ ERR("Register trigger, %s", lttng_strerror(ret));
+ ret = -1;
+ goto end;
+ }
+
+ ret = 0;
+
+end:
+ return ret;
+}
+
+int unsubscribe_session_consumed_size_rotation(struct ltt_session *session,
+ struct notification_thread_handle *notification_thread_handle)
+{
+ int ret = 0;
+ enum lttng_notification_channel_status status;
+
+ status = lttng_notification_channel_unsubscribe(
+ rotate_notification_channel,
+ session->rotate_condition);
+ if (status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) {
+ ERR("Session unsubscribe error: %d", (int) status);
+ ret = -1;
+ goto end;
+ }
+
+ ret = notification_thread_command_unregister_trigger(
+ notification_thread_handle, session->rotate_trigger);
+ if (ret != LTTNG_OK) {
+ ERR("Session unregister trigger error: %d", ret);
+ goto end;
+ }
+
+ ret = 0;
end:
return ret;
}
projects / lttng-tools.git / blobdiff