Initial commit of d32e8d0b8d9e0ef7cf7ab2e74548982972789dfc from qemu-kvm

1 files changed, 64 insertions, 0 deletions

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 <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 <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
+};
+
+#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