2 * Copyright (C) 2008 Intel Corporation
4 * mdmon socket / message handling
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
27 enum md_message_action
{
28 md_action_ping_monitor
,
29 md_action_remove_device
,
32 struct md_generic_cmd
{
33 enum md_message_action action
;
36 struct md_remove_device_cmd
{
37 enum md_message_action action
;
41 /* union of all known command types, used to sanity check ->num_bytes
44 union md_message_commands
{
45 struct md_generic_cmd generic
;
46 struct md_remove_device_cmd remove
;
49 extern const int start_magic
;
50 extern const int end_magic
;
52 extern int receive_message(int fd
, struct md_message
*msg
, int tmo
);
53 extern int send_message(int fd
, struct md_message
*msg
, int tmo
);
54 extern int ack(int fd
, int seq
, int tmo
);
55 extern int nack(int fd
, int err
, int tmo
);
56 extern int connect_monitor(char *devname
);
57 extern int ping_monitor(char *devname
);
58 extern int send_remove_device(int fd
, dev_t rdev
, int seq
, int tmo
);