1 files changed, 100 insertions, 0 deletions
diff --git a/include/block/nbd.h b/include/block/nbd.h
new file mode 100644
index 0000000000..344f05b794
--- /dev/null
+++ b/include/block/nbd.h
@@ -0,0 +1,100 @@
+/*
+ *  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"
+
+struct nbd_request {
+    uint32_t magic;
+    uint32_t type;
+    uint64_t handle;
+    uint64_t from;
+    uint32_t len;
+} QEMU_PACKED;
+
+struct nbd_reply {
+    uint32_t magic;
+    uint32_t error;
+    uint64_t handle;
+} QEMU_PACKED;
+
+#define NBD_FLAG_HAS_FLAGS      (1 << 0)        /* Flags are there */
+#define NBD_FLAG_READ_ONLY      (1 << 1)        /* Device is read-only */
+#define NBD_FLAG_SEND_FLUSH     (1 << 2)        /* Send FLUSH */
+#define NBD_FLAG_SEND_FUA       (1 << 3)        /* Send FUA (Force Unit Access) */
+#define NBD_FLAG_ROTATIONAL     (1 << 4)        /* Use elevator algorithm - rotational media */
+#define NBD_FLAG_SEND_TRIM      (1 << 5)        /* Send TRIM (discard) */
+
+#define NBD_CMD_MASK_COMMAND	0x0000ffff
+#define NBD_CMD_FLAG_FUA	(1 << 16)
+
+enum {
+    NBD_CMD_READ = 0,
+    NBD_CMD_WRITE = 1,
+    NBD_CMD_DISC = 2,
+    NBD_CMD_FLUSH = 3,
+    NBD_CMD_TRIM = 4
+};
+
+#define NBD_DEFAULT_PORT	10809
+
+#define NBD_BUFFER_SIZE (1024*1024)
+
+ssize_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 tcp_socket_outgoing_spec(const char *address_and_port);
+int tcp_socket_incoming_spec(const char *address_and_port);
+int unix_socket_outgoing(const char *path);
+int unix_socket_incoming(const char *path);
+
+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, uint32_t flags, off_t size, size_t blocksize);
+ssize_t nbd_send_request(int csock, struct nbd_request *request);
+ssize_t nbd_receive_reply(int csock, struct nbd_reply *reply);
+int nbd_client(int fd);
+int nbd_disconnect(int fd);
+
+typedef struct NBDExport NBDExport;
+typedef struct NBDClient NBDClient;
+
+NBDExport *nbd_export_new(BlockDriverState *bs, off_t dev_offset,
+                          off_t size, uint32_t nbdflags,
+                          void (*close)(NBDExport *));
+void nbd_export_close(NBDExport *exp);
+void nbd_export_get(NBDExport *exp);
+void nbd_export_put(NBDExport *exp);
+
+BlockDriverState *nbd_export_get_blockdev(NBDExport *exp);
+
+NBDExport *nbd_export_find(const char *name);
+void nbd_export_set_name(NBDExport *exp, const char *name);
+void nbd_export_close_all(void);
+
+NBDClient *nbd_client_new(NBDExport *exp, int csock,
+                          void (*close)(NBDClient *));
+void nbd_client_close(NBDClient *client);
+void nbd_client_get(NBDClient *client);
+void nbd_client_put(NBDClient *client);
+
+#endif