ppc: Remove broken partial PVR matching
[qemu/qmp-unstable.git] / nbd.h
blob61553f41280f572aebbd70bd5c3540426d3f00a0
1 /*
2 * Copyright (C) 2005 Anthony Liguori <anthony@codemonkey.ws>
4 * Network Block Device
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.
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.
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/>.
19 #ifndef NBD_H
20 #define NBD_H
22 #include <sys/types.h>
24 #include "qemu-common.h"
26 struct nbd_request {
27 uint32_t magic;
28 uint32_t type;
29 uint64_t handle;
30 uint64_t from;
31 uint32_t len;
32 } QEMU_PACKED;
34 struct nbd_reply {
35 uint32_t magic;
36 uint32_t error;
37 uint64_t handle;
38 } QEMU_PACKED;
40 #define NBD_FLAG_HAS_FLAGS (1 << 0) /* Flags are there */
41 #define NBD_FLAG_READ_ONLY (1 << 1) /* Device is read-only */
42 #define NBD_FLAG_SEND_FLUSH (1 << 2) /* Send FLUSH */
43 #define NBD_FLAG_SEND_FUA (1 << 3) /* Send FUA (Force Unit Access) */
44 #define NBD_FLAG_ROTATIONAL (1 << 4) /* Use elevator algorithm - rotational media */
45 #define NBD_FLAG_SEND_TRIM (1 << 5) /* Send TRIM (discard) */
47 #define NBD_CMD_MASK_COMMAND 0x0000ffff
48 #define NBD_CMD_FLAG_FUA (1 << 16)
50 enum {
51 NBD_CMD_READ = 0,
52 NBD_CMD_WRITE = 1,
53 NBD_CMD_DISC = 2,
54 NBD_CMD_FLUSH = 3,
55 NBD_CMD_TRIM = 4
58 #define NBD_DEFAULT_PORT 10809
60 size_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read);
61 int tcp_socket_outgoing(const char *address, uint16_t port);
62 int tcp_socket_incoming(const char *address, uint16_t port);
63 int tcp_socket_outgoing_spec(const char *address_and_port);
64 int tcp_socket_incoming_spec(const char *address_and_port);
65 int unix_socket_outgoing(const char *path);
66 int unix_socket_incoming(const char *path);
68 int nbd_negotiate(int csock, off_t size, uint32_t flags);
69 int nbd_receive_negotiate(int csock, const char *name, uint32_t *flags,
70 off_t *size, size_t *blocksize);
71 int nbd_init(int fd, int csock, uint32_t flags, off_t size, size_t blocksize);
72 int nbd_send_request(int csock, struct nbd_request *request);
73 int nbd_receive_reply(int csock, struct nbd_reply *reply);
74 int nbd_trip(BlockDriverState *bs, int csock, off_t size, uint64_t dev_offset,
75 off_t *offset, uint32_t nbdflags, uint8_t *data, int data_size);
76 int nbd_client(int fd);
77 int nbd_disconnect(int fd);
79 #endif