From 68396ea9c0fe4f75ce30b1eba2c44c43c13344bb Mon Sep 17 00:00:00 2001 From: Robert Mustacchi Date: Fri, 24 Jun 2011 13:49:54 -0700 Subject: Initial commit of d32e8d0b8d9e0ef7cf7ab2e74548982972789dfc from qemu-kvm --- nbd.h | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 nbd.h (limited to 'nbd.h') diff --git a/nbd.h b/nbd.h new file mode 100644 index 0000000..fc3a594 --- /dev/null +++ b/nbd.h @@ -0,0 +1,64 @@ +/* + * Copyright (C) 2005 Anthony Liguori + * + * Network Block Device + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; under version 2 of the License. + * + * 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, see . + */ + +#ifndef NBD_H +#define NBD_H + +#include + +#include +#include "block_int.h" + +struct nbd_request { + uint32_t type; + uint64_t handle; + uint64_t from; + uint32_t len; +}; + +struct nbd_reply { + uint32_t error; + uint64_t handle; +}; + +enum { + NBD_CMD_READ = 0, + NBD_CMD_WRITE = 1, + NBD_CMD_DISC = 2 +}; + +#define NBD_DEFAULT_PORT 10809 + +size_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read); +int tcp_socket_outgoing(const char *address, uint16_t port); +int tcp_socket_incoming(const char *address, uint16_t port); +int unix_socket_outgoing(const char *path); +int unix_socket_incoming(const char *path); + +int nbd_negotiate(int csock, off_t size); +int nbd_receive_negotiate(int csock, const char *name, uint32_t *flags, + off_t *size, size_t *blocksize); +int nbd_init(int fd, int csock, off_t size, size_t blocksize); +int nbd_send_request(int csock, struct nbd_request *request); +int nbd_receive_reply(int csock, struct nbd_reply *reply); +int nbd_trip(BlockDriverState *bs, int csock, off_t size, uint64_t dev_offset, + off_t *offset, bool readonly, uint8_t *data, int data_size); +int nbd_client(int fd); +int nbd_disconnect(int fd); + +#endif -- cgit v1.2.3