File:  [Qemu by Fabrice Bellard] / qemu / nbd.h
Revision 1.1.1.5 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 18:55:52 2018 UTC (3 years, 1 month ago) by root
Branches: qemu, MAIN
CVS tags: qemu1000, qemu0151, HEAD
qemu 0.15.1

    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

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