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1 | /* | |
2 | * 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 | |
16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
19 | #ifndef NBD_H | |
20 | #define NBD_H | |
21 | ||
22 | #include <sys/types.h> | |
23 | ||
24 | #include <qemu-common.h> | |
25 | ||
26 | #include "block_int.h" | |
27 | ||
28 | struct nbd_request { | |
29 | uint32_t magic; | |
30 | uint32_t type; | |
31 | uint64_t handle; | |
32 | uint64_t from; | |
33 | uint32_t len; | |
34 | } __attribute__ ((__packed__)); | |
35 | ||
36 | struct nbd_reply { | |
37 | uint32_t magic; | |
38 | uint32_t error; | |
39 | uint64_t handle; | |
40 | } __attribute__ ((__packed__)); | |
41 | ||
42 | enum { | |
43 | NBD_CMD_READ = 0, | |
44 | NBD_CMD_WRITE = 1, | |
45 | NBD_CMD_DISC = 2 | |
46 | }; | |
47 | ||
48 | #define NBD_DEFAULT_PORT 10809 | |
49 | ||
50 | size_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read); | |
51 | int tcp_socket_outgoing(const char *address, uint16_t port); | |
52 | int tcp_socket_incoming(const char *address, uint16_t port); | |
53 | int tcp_socket_outgoing_spec(const char *address_and_port); | |
54 | int tcp_socket_incoming_spec(const char *address_and_port); | |
55 | int unix_socket_outgoing(const char *path); | |
56 | int unix_socket_incoming(const char *path); | |
57 | ||
58 | int nbd_negotiate(int csock, off_t size); | |
59 | int nbd_receive_negotiate(int csock, const char *name, uint32_t *flags, | |
60 | off_t *size, size_t *blocksize); | |
61 | int nbd_init(int fd, int csock, off_t size, size_t blocksize); | |
62 | int nbd_send_request(int csock, struct nbd_request *request); | |
63 | int nbd_receive_reply(int csock, struct nbd_reply *reply); | |
64 | int nbd_trip(BlockDriverState *bs, int csock, off_t size, uint64_t dev_offset, | |
65 | off_t *offset, bool readonly, uint8_t *data, int data_size); | |
66 | int nbd_client(int fd); | |
67 | int nbd_disconnect(int fd); | |
68 | ||
69 | #endif |