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/*
* Copyright (C) 2008 Intel Corporation
*
* mdmon socket / message handling
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*/
struct mdinfo;
struct mdinfo;
struct md_message {
int seq;
int num_bytes;
void *buf;
};
enum md_message_action {
md_action_ping_monitor,
md_action_remove_device,
};
struct md_generic_cmd {
enum md_message_action action;
};
struct md_remove_device_cmd {
enum md_message_action action;
dev_t rdev;
};
/* union of all known command types, used to sanity check ->num_bytes
* on the receive path
*/
union md_message_commands {
struct md_generic_cmd generic;
struct md_remove_device_cmd remove;
};
extern const int start_magic;
extern const int end_magic;
extern int receive_message(int fd, struct md_message *msg, int tmo);
extern int send_message(int fd, struct md_message *msg, int tmo);
extern int ack(int fd, int seq, int tmo);
extern int nack(int fd, int err, int tmo);
extern int connect_monitor(char *devname);
extern int ping_monitor(char *devname);
extern int send_remove_device(int fd, dev_t rdev, int seq, int tmo);
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