fs/9p/mux.h

   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 as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to:
  21  *  Free Software Foundation
  22  *  51 Franklin Street, Fifth Floor
  23  *  Boston, MA  02111-1301  USA
  24  *
  25  */
  26
  27 struct v9fs_mux_data;
  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  */
  40 typedef void (*v9fs_mux_req_callback)(void *a, struct v9fs_fcall *tc,
  41         struct v9fs_fcall *rc, int err);
  42
  43 int v9fs_mux_global_init(void);
  44 void v9fs_mux_global_exit(void);
  45
  46 struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
  47         unsigned char *extended);
  48 void v9fs_mux_destroy(struct v9fs_mux_data *);
  49
  50 int v9fs_mux_send(struct v9fs_mux_data *m, struct v9fs_fcall *tc);
  51 struct v9fs_fcall *v9fs_mux_recv(struct v9fs_mux_data *m);
  52 int v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, struct v9fs_fcall **rc);
  53 int v9fs_mux_rpcnb(struct v9fs_mux_data *m, struct v9fs_fcall *tc,
  54         v9fs_mux_req_callback cb, void *a);
  55
  56 void v9fs_mux_flush(struct v9fs_mux_data *m, int sendflush);
  57 void v9fs_mux_cancel(struct v9fs_mux_data *m, int err);
  58 int v9fs_errstr2errno(char *errstr, int len);