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/*
* Copyright (c) 2002-2016 Balabit
* Copyright (c) 2016 Viktor Juhasz <viktor.juhasz@balabit.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 as published
* by the Free Software Foundation, or (at your option) any later version.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "diskq.h"
#include "driver.h"
#include "messages.h"
#include "logqueue-disk.h"
#include "logqueue-disk-reliable.h"
#include "logqueue-disk-non-reliable.h"
#include "persist-state.h"
#define DISKQ_PLUGIN_NAME "diskq"
struct _DiskQDestPlugin
{
LogDriverPlugin super;
DiskQueueOptions options;
};
static gboolean
log_queue_disk_is_file_in_directory(const gchar *file, const gchar *directory)
{
gchar *basedir = g_path_get_dirname(file);
const gboolean result = (0 == strcmp(basedir, directory));
g_free(basedir);
return result;
}
static LogQueue *
_acquire_queue(LogDestDriver *dd, const gchar *persist_name)
{
DiskQDestPlugin *self = log_driver_get_plugin(&dd->super, DiskQDestPlugin, DISKQ_PLUGIN_NAME);
GlobalConfig *cfg = log_pipe_get_config(&dd->super.super);
LogQueue *queue = NULL;
gchar *qfile_name;
gboolean success;
if (persist_name)
queue = cfg_persist_config_fetch(cfg, persist_name);
if (queue)
{
log_queue_unref(queue);
queue = NULL;
}
if (self->options.reliable)
queue = log_queue_disk_reliable_new(&self->options, persist_name);
else
queue = log_queue_disk_non_reliable_new(&self->options, persist_name);
log_queue_set_throttle(queue, dd->throttle);
qfile_name = persist_state_lookup_string(cfg->state, persist_name, NULL, NULL);
if (qfile_name && !log_queue_disk_is_file_in_directory(qfile_name, self->options.dir))
{
msg_warning("The disk buffer directory has changed in the configuration, but the disk queue file cannot be moved",
evt_tag_str("qfile", qfile_name),
evt_tag_str("dir", self->options.dir));
}
success = log_queue_disk_load_queue(queue, qfile_name);
if (!success)
{
if (qfile_name && log_queue_disk_load_queue(queue, NULL))
{
msg_error("Error opening disk-queue file, a new one started",
evt_tag_str("old_filename", qfile_name),
evt_tag_str("new_filename", log_queue_disk_get_filename(queue)));
}
else
{
g_free(qfile_name);
msg_error("Error initializing log queue");
return NULL;
}
}
g_free(qfile_name);
if (persist_name)
{
/* save the queue file name to permanent state */
qfile_name = (gchar *) log_queue_disk_get_filename(queue);
if (qfile_name)
{
persist_state_alloc_string(cfg->state, persist_name, qfile_name, -1);
}
}
return queue;
}
void
_release_queue(LogDestDriver *dd, LogQueue *queue)
{
GlobalConfig *cfg = log_pipe_get_config(&dd->super.super);
gboolean persistent;
log_queue_disk_save_queue(queue, &persistent);
if (queue->persist_name)
{
cfg_persist_config_add(cfg, queue->persist_name, queue, (GDestroyNotify) log_queue_unref, FALSE);
}
else
{
log_queue_unref(queue);
}
}
static gboolean
_attach(LogDriverPlugin *s, LogDriver *d)
{
DiskQDestPlugin *self = (DiskQDestPlugin *) s;
LogDestDriver *dd = (LogDestDriver *) d;
GlobalConfig *cfg = log_pipe_get_config(&d->super);
if (self->options.disk_buf_size == -1)
{
msg_error("The required 'disk_buf_size()' parameter of diskq module has not been set.");
return FALSE;
}
if (self->options.disk_buf_size < MIN_DISK_BUF_SIZE && self->options.disk_buf_size != 0)
{
msg_warning("The value of 'disk_buf_size()' is too low, setting to the smallest acceptable value",
evt_tag_long("min_space", MIN_DISK_BUF_SIZE));
self->options.disk_buf_size = MIN_DISK_BUF_SIZE;
}
if (self->options.mem_buf_length < 0)
self->options.mem_buf_length = dd->log_fifo_size;
if (self->options.mem_buf_length < 0)
self->options.mem_buf_length = cfg->log_fifo_size;
if (self->options.qout_size < 0)
self->options.qout_size = 64;
dd->acquire_queue = _acquire_queue;
dd->release_queue = _release_queue;
return TRUE;
}
static void
_free(LogDriverPlugin *s)
{
DiskQDestPlugin *self = (DiskQDestPlugin *)s;
disk_queue_options_destroy(&self->options);
log_driver_plugin_free_method(s);
}
DiskQueueOptions *diskq_get_options(DiskQDestPlugin *self)
{
return &self->options;
}
DiskQDestPlugin *
diskq_dest_plugin_new(void)
{
DiskQDestPlugin *self = g_new0(DiskQDestPlugin, 1);
log_driver_plugin_init_instance(&self->super, DISKQ_PLUGIN_NAME);
disk_queue_options_set_default_options(&self->options);
self->super.attach = _attach;
self->super.free_fn = _free;
return self;
}
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