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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 SERVER_H_
#define SERVER_H_
#include <stdint.h>
#include <stdio.h>
#include <glib.h>
#include "../config.h"
#include "../types.h"
typedef struct
{
int fd;
} dnbd3_connection_t;
/**
* Image struct. An image path could be something like
* /mnt/images/rz/zfs/Windows7 ZfS.vmdk.1
* and the lower_name would then be
* rz/zfs/windows7 zfs.vmdk
*/
typedef struct
{
char *path; // absolute path of the image
char *lower_name; // relative path, all lowercase, minus revision ID
int rid; // revision of image
uint64_t filesize; // size of image
time_t atime; // last access time
uint8_t *cache_map; // cache map telling which parts are locally cached
dnbd3_connection_t *uplink; // NULL = local image / completely cached, pointer to a server connection otherwise
char working; // TRUE if image exists and completeness is == 100% or a working upstream proxy is connected
time_t delete_soft; // unixtime telling when this image should be deleted. if there are still clients using this image it weill be kept, but new clients requesting the image will be rejected. 0 = never
time_t delete_hard; // unixtime telling when this image should be deleted, no matter if there are still clients connected. 0 = never
pthread_spinlock_t lock;
} dnbd3_image_t;
typedef struct
{
uint16_t len;
uint8_t data[65535];
} dnbd3_binstring_t;
// Do not always allocate as much memory as required to hold the entire binstring struct,
// but only as much as is required to hold the actual data
#define NEW_BINSTRING(_name, _len) \
dnbd3_binstring_t *_name = malloc(sizeof(uint16_t) + _len); \
_name->len = _len
typedef struct
{
int sock;
dnbd3_host_t host;
uint8_t is_server; // TRUE if a server in proxy mode, FALSE if real client
pthread_t thread;
dnbd3_image_t *image;
pthread_spinlock_t lock;
GSList *sendqueue; // list of dnbd3_binstring_t*
} dnbd3_client_t;
typedef struct
{
time_t last_told;
dnbd3_host_t host;
char comment[COMMENT_LENGTH];
} dnbd3_alt_server_t;
typedef struct
{
char comment[COMMENT_LENGTH];
dnbd3_host_t host;
dnbd3_host_t mask;
} dnbd3_acess_rules_t;
extern dnbd3_client_t *_clients[SERVER_MAX_CLIENTS];
extern int _num_clients;
extern pthread_spinlock_t _clients_lock;
extern dnbd3_image_t *_images[SERVER_MAX_IMAGES];
extern int _num_images;
extern pthread_spinlock_t _images_lock;
extern dnbd3_alt_server_t *_alt_servers[SERVER_MAX_ALTS];
extern int _num_alts;
extern pthread_spinlock_t _alts_lock;
extern char *_config_file_name, *_rpc_password, *_cache_dir;
#ifdef _DEBUG
extern int _fake_delay;
#endif
void dnbd3_cleanup();
void dnbd3_free_client(dnbd3_client_t *client);
#if !defined(_FILE_OFFSET_BITS) || _FILE_OFFSET_BITS != 64
#error Please set _FILE_OFFSET_BITS to 64 in your makefile/configuration
#endif
#endif /* SERVER_H_ */
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