1/*
2 * linux/fs/9p/mux.h
3 *
4 * Multiplexer Definitions
5 *
6 *  Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
7 *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
8 *
9 *  This program is free software; you can redistribute it and/or modify
10 *  it under the terms of the GNU General Public License version 2
11 *  as published by the Free Software Foundation.
12 *
13 *  This program is distributed in the hope that it will be useful,
14 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *  GNU General Public License for more details.
17 *
18 *  You should have received a copy of the GNU General Public License
19 *  along with this program; if not, write to:
20 *  Free Software Foundation
21 *  51 Franklin Street, Fifth Floor
22 *  Boston, MA  02111-1301  USA
23 *
24 */
25
26struct v9fs_mux_data;
27struct v9fs_req;
28
29/**
30 * v9fs_mux_req_callback - callback function that is called when the
31 * response of a request is received. The callback is called from
32 * a workqueue and shouldn't block.
33 *
34 * @a - the pointer that was specified when the request was send to be
35 *      passed to the callback
36 * @tc - request call
37 * @rc - response call
38 * @err - error code (non-zero if error occured)
39 */
40typedef void (*v9fs_mux_req_callback)(struct v9fs_req *req, void *a);
41
42int v9fs_mux_global_init(void);
43void v9fs_mux_global_exit(void);
44
45struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
46	unsigned char *extended);
47void v9fs_mux_destroy(struct v9fs_mux_data *);
48
49int v9fs_mux_send(struct v9fs_mux_data *m, struct v9fs_fcall *tc);
50struct v9fs_fcall *v9fs_mux_recv(struct v9fs_mux_data *m);
51int v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, struct v9fs_fcall **rc);
52
53void v9fs_mux_flush(struct v9fs_mux_data *m, int sendflush);
54void v9fs_mux_cancel(struct v9fs_mux_data *m, int err);
55int v9fs_errstr2errno(char *errstr, int len);
56