1d45f8b542
This patch allows to connect Qemu using NBD protocol to an nbd-server
using named exports.
For instance, if on the host "isoserver", in /etc/nbd-server/config, you have:
[generic]
[debian-500-ppc-netinst]
exportname = /ISO/debian-500-powerpc-netinst.iso
[Fedora-10-ppc-netinst]
exportname = /ISO/Fedora-10-ppc-netinst.iso
You can connect to it, using:
qemu -cdrom nbd:isoserver:exportname=debian-500-ppc-netinst
qemu -cdrom nbd:isoserver:exportname=Fedora-10-ppc-netinst
NOTE: you need at least nbd-server 2.9.18
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/*
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* Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws>
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*
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* Network Block Device
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; under version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef NBD_H
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#define NBD_H
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#include <sys/types.h>
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#include <qemu-common.h>
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#include "block_int.h"
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struct nbd_request {
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uint32_t type;
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uint64_t handle;
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uint64_t from;
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uint32_t len;
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};
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struct nbd_reply {
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uint32_t error;
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uint64_t handle;
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};
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enum {
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NBD_CMD_READ = 0,
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NBD_CMD_WRITE = 1,
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NBD_CMD_DISC = 2
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};
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#define NBD_DEFAULT_PORT 10809
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size_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read);
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int tcp_socket_outgoing(const char *address, uint16_t port);
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int tcp_socket_incoming(const char *address, uint16_t port);
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int unix_socket_outgoing(const char *path);
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int unix_socket_incoming(const char *path);
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int nbd_negotiate(int csock, off_t size);
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int nbd_receive_negotiate(int csock, const char *name, uint32_t *flags,
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off_t *size, size_t *blocksize);
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int nbd_init(int fd, int csock, off_t size, size_t blocksize);
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int nbd_send_request(int csock, struct nbd_request *request);
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int nbd_receive_reply(int csock, struct nbd_reply *reply);
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int nbd_trip(BlockDriverState *bs, int csock, off_t size, uint64_t dev_offset,
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off_t *offset, bool readonly, uint8_t *data, int data_size);
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int nbd_client(int fd, int csock);
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int nbd_disconnect(int fd);
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#endif
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