/*
* 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 <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);
-}
-
-int rotate_add_channel_pending(uint64_t key, enum lttng_domain_type domain,
- struct ltt_session *session)
-{
- int ret;
- struct rotation_channel_info *new_info;
- struct rotation_channel_key channel_key = { .key = key,
- .domain = domain };
-
- new_info = zmalloc(sizeof(struct rotation_channel_info));
- if (!new_info) {
- goto error;
- }
-
- new_info->channel_key.key = key;
- new_info->channel_key.domain = domain;
- new_info->session_id = session->id;
- cds_lfht_node_init(&new_info->rotate_channels_ht_node);
-
- session->nr_chan_rotate_pending++;
- cds_lfht_add(channel_pending_rotate_ht,
- hash_channel_key(&channel_key),
- &new_info->rotate_channels_ht_node);
-
- ret = 0;
- goto end;
-
-error:
- ret = -1;
-end:
- return ret;
-}
-
-/* The session's lock must be held by the caller. */
-static
-int session_rename_chunk(struct ltt_session *session, char *current_path,
- char *new_path)
-{
- int ret;
- struct consumer_socket *socket;
- struct consumer_output *output;
- struct lttng_ht_iter iter;
- uid_t uid;
- gid_t gid;
-
- DBG("Renaming session chunk path of session \"%s\" from %s to %s",
- session->name, current_path, new_path);
-
- /*
- * Either one of the sessions is enough to find the consumer_output
- * and uid/gid.
- */
- if (session->kernel_session) {
- output = session->kernel_session->consumer;
- uid = session->kernel_session->uid;
- gid = session->kernel_session->gid;
- } else if (session->ust_session) {
- output = session->ust_session->consumer;
- uid = session->ust_session->uid;
- gid = session->ust_session->gid;
- } else {
- assert(0);
- }
-
- if (!output || !output->socks) {
- ERR("No consumer output found for session \"%s\"",
- session->name);
- ret = -1;
- goto end;
- }
-
- rcu_read_lock();
- /*
- * We have to iterate to find a socket, but we only need to send the
- * rename command to one consumer, so we break after the first one.
- */
- cds_lfht_for_each_entry(output->socks->ht, &iter.iter, socket, node.node) {
- pthread_mutex_lock(socket->lock);
- ret = consumer_rotate_rename(socket, session->id, output,
- current_path, new_path, uid, gid);
- pthread_mutex_unlock(socket->lock);
- if (ret) {
- ret = -1;
- goto end_unlock;
- }
- break;
- }
-
- ret = 0;
-
-end_unlock:
- rcu_read_unlock();
-end:
- return ret;
-}
-
-/* The session's lock must be held by the caller. */
-static
-int rename_first_chunk(struct ltt_session *session,
- struct consumer_output *consumer, char *new_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);
- 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;
- goto error;
- }
- } else {
- ret = snprintf(current_full_path, sizeof(current_full_path), "%s/%s",
- consumer->dst.session_root_path, consumer->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;
- goto error;
- }
- }
- /* New domain path: <session>/<start-date>-<end-date>-<rotate-count>/kernel */
- ret = snprintf(new_full_path, sizeof(new_full_path), "%s/%s",
- new_path, consumer->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;
- goto error;
- }
- /*
- * Move the per-domain fcurrenter inside the first rotation
- * fcurrenter.
- */
- ret = session_rename_chunk(session, current_full_path, new_full_path);
- if (ret < 0) {
- ret = -LTTNG_ERR_UNK;
- goto error;
- }
-
- ret = 0;
-
-error:
- return ret;
-}
-
-/*
- * Rename a chunk folder after a rotation is complete.
- * session_lock_list and session lock must be held.
- *
- * Returns 0 on success, a negative value on error.
- */
-int rename_complete_chunk(struct ltt_session *session, time_t ts)
-{
- struct tm *timeinfo;
- char new_path[LTTNG_PATH_MAX];
- char datetime[21], start_datetime[21];
- int ret;
- size_t strf_ret;
-
- DBG("Renaming completed chunk for session %s", session->name);
- timeinfo = localtime(&ts);
- if (!timeinfo) {
- ERR("Failed to retrieve local time while renaming completed chunk");
- ret = -1;
- goto end;
- }
-
- strf_ret = strftime(datetime, sizeof(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[21];
-
- 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_time, sizeof(start_time),
- "%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;
- }
-
- /*
- * 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);
- /*
- * This is not a fatal error for the rotation
- * thread, we just need to inform the client
- * that a problem occurred with the rotation.
- * Returning 0, same for the other errors
- * below.
- */
- ret = 0;
- goto error;
- }
- }
- if (session->ust_session) {
- ret = rename_first_chunk(session,
- session->ust_session->consumer,
- new_path);
- if (ret) {
- ERR("Failed to rename userspace session trace folder to %s", new_path);
- ret = 0;
- goto error;
- }
- }
- } else {
- /*
- * 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%dT%H%M%S%z", 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",
- session->rotation_chunk.current_rotate_path,
- new_path);
- ret = 0;
- goto error;
- }
- }
-
- /*
- * Store the path where the readable chunk is. This path is valid
- * and can be queried by the client with rotate_pending until the next
- * rotation is started.
- */
- ret = lttng_strncpy(session->rotation_chunk.current_rotate_path,
- new_path,
- sizeof(session->rotation_chunk.current_rotate_path));
- if (ret) {
- ERR("Failed the current chunk's path of session \"%s\"",
- session->name);
- ret = -1;
- goto error;
- }
-
- goto end;
-
-error:
- session->rotation_state = LTTNG_ROTATION_STATE_ERROR;
-end:
- return ret;
-}
-
-int relay_rotate_pending(struct ltt_session *session, uint64_t chunk_id)
-{
- int ret;
- struct consumer_socket *socket;
- struct consumer_output *output;
- struct lttng_ht_iter iter;
-
- /*
- * Either one of the sessions is enough to find the consumer_output
- * and uid/gid.
- */
- if (session->kernel_session) {
- output = session->kernel_session->consumer;
- } else if (session->ust_session) {
- output = session->ust_session->consumer;
- } else {
- assert(0);
- }
-
- if (!output || !output->socks) {
- ERR("No consumer output found");
- ret = -1;
- goto end;
- }
-
- ret = -1;
-
- rcu_read_lock();
- /*
- * We have to iterate to find a socket, but we only need to send the
- * rotate pending command to one consumer, so we break after the first
- * one.
- */
- cds_lfht_for_each_entry(output->socks->ht, &iter.iter, socket,
- node.node) {
- pthread_mutex_lock(socket->lock);
- ret = consumer_rotate_pending_relay(socket, output, session->id,
- chunk_id);
- pthread_mutex_unlock(socket->lock);
- break;
- }
- rcu_read_unlock();
-
-end:
- return ret;
-}
-
int subscribe_session_consumed_size_rotation(struct ltt_session *session, uint64_t size,
struct notification_thread_handle *notification_thread_handle)
{