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ths75818252008-07-03 13:41:03 +00001/*
bellard7a5ca862008-05-27 21:13:40 +00002 * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws>
3 *
4 * Network Block Device
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; under version 2 of the License.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
Blue Swirl8167ee82009-07-16 20:47:01 +000016 * along with this program; if not, see <http://www.gnu.org/licenses/>.
ths75818252008-07-03 13:41:03 +000017 */
bellard7a5ca862008-05-27 21:13:40 +000018
19#ifndef NBD_H
20#define NBD_H
21
22#include <sys/types.h>
23#include <stdbool.h>
24
25#include <qemu-common.h>
26#include "block_int.h"
27
ths75818252008-07-03 13:41:03 +000028struct nbd_request {
29 uint32_t type;
30 uint64_t handle;
31 uint64_t from;
32 uint32_t len;
33};
34
35struct nbd_reply {
36 uint32_t error;
37 uint64_t handle;
38};
39
40enum {
41 NBD_CMD_READ = 0,
42 NBD_CMD_WRITE = 1,
43 NBD_CMD_DISC = 2
44};
45
46size_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read);
47int tcp_socket_outgoing(const char *address, uint16_t port);
bellard7a5ca862008-05-27 21:13:40 +000048int tcp_socket_incoming(const char *address, uint16_t port);
thscd831bd2008-07-03 10:23:51 +000049int unix_socket_outgoing(const char *path);
50int unix_socket_incoming(const char *path);
bellard7a5ca862008-05-27 21:13:40 +000051
aliguori27982662008-09-10 15:23:19 +000052int nbd_negotiate(int csock, off_t size);
thscd831bd2008-07-03 10:23:51 +000053int nbd_receive_negotiate(int csock, off_t *size, size_t *blocksize);
54int nbd_init(int fd, int csock, off_t size, size_t blocksize);
ths75818252008-07-03 13:41:03 +000055int nbd_send_request(int csock, struct nbd_request *request);
56int nbd_receive_reply(int csock, struct nbd_reply *reply);
ths2f726482008-07-03 11:47:46 +000057int nbd_trip(BlockDriverState *bs, int csock, off_t size, uint64_t dev_offset,
58 off_t *offset, bool readonly, uint8_t *data, int data_size);
bellard7a5ca862008-05-27 21:13:40 +000059int nbd_client(int fd, int csock);
60int nbd_disconnect(int fd);
61
62#endif