/* * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws> * * 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 <http://www.gnu.org/licenses/>. */ #ifndef NBD_H #define NBD_H #include <sys/types.h> #include <stdbool.h> #include <qemu-common.h> #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 }; 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, 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 csock); int nbd_disconnect(int fd); #endif