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/*
* This file is part of the Distributed Network Block Device 3
*
* Copyright(c) 2011-2012 Johann Latocha <johann@latocha.de>
*
* This file may be licensed under the terms of of the
* GNU General Public License Version 2 (the ``GPL'').
*
* Software distributed under the License is distributed
* on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
* express or implied. See the GPL for the specific language
* governing rights and limitations.
*
* You should have received a copy of the GPL along with this
* program. If not, go to http://www.gnu.org/licenses/gpl.html
* or write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef DNBD_H_
#define DNBD_H_
#include <linux/version.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/blkdev.h>
#include <net/sock.h>
#include "config.h"
#include "types.h"
#include "serialize.h"
extern int major;
typedef struct
{
uint64_t rtts[4]; // Last four round trip time measurements in µs
uint16_t port; // Port in network representation
uint16_t protocol_version; // dnbd3 protocol version of this server
uint8_t hostaddr[16]; // Address in network representation (IPv4 or IPv6)
uint8_t hostaddrtype; // Address type (AF_INET or AF_INET6)
uint8_t skip_count; // Do not check this server the next skip_count times
struct kobject kobj; // SysFS
} dnbd3_server_t;
typedef struct
{
// block
struct gendisk *disk;
spinlock_t blk_lock;
// sysfs
struct kobject kobj;
// network
struct socket *sock;
dnbd3_server_t cur_server;
uint64_t cur_rtt;
char *imgname;
serialized_buffer_t payload_buffer;
int rid, update_available;
int alt_servers_num; // number of currently known alt servers
dnbd3_server_t alt_servers[NUMBER_SERVERS]; // array of alt servers
int new_servers_num; // number of new alt servers that are waiting to be copied to above array
dnbd3_server_entry_t new_servers[NUMBER_SERVERS]; // pending new alt servers
int discover, panic, panic_count, disconnecting;
uint64_t reported_size;
// server switch
struct socket *better_sock;
// process
struct timer_list hb_timer;
struct task_struct *thread_send;
struct task_struct *thread_receive;
struct task_struct *thread_discover;
wait_queue_head_t process_queue_send;
wait_queue_head_t process_queue_receive;
wait_queue_head_t process_queue_discover;
struct list_head request_queue_send;
struct list_head request_queue_receive;
} dnbd3_device_t;
#endif /* DNBD_H_ */
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