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lvm2/libdm/libdm-event.h
Benjamin Marzinski 5469414bf8 Timeout event implementation:
The daemon side of this is mostly the same as the patch I sent out.  To select
a timeout period different than the default and to get the timeout period,
I added two library calls, dm_set_event_timeout() and dm_get_event_timeout().
If people are against them, the other option is to tack extra arguments onto
dm_regiser_for_event() and dm_get_registered_device().  I also added a
-t option to dmevent, so people can try out timeouts.
2005-06-09 18:40:49 +00:00

96 lines
2.9 KiB
C

/*
* Copyright (C) 2005 Red Hat, Inc. All rights reserved.
*
* This file is part of the device-mapper userspace tools.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef LIB_DMEVENT_H
#define LIB_DMEVENT_H
#include "list.h"
#include <stdint.h>
#define DAEMON "/sbin/dmeventd"
#define LOCKFILE "/var/lock/dmeventd"
#define FIFO_CLIENT "/var/run/dmeventd-client"
#define FIFO_SERVER "/var/run/dmeventd-server"
#define PIDFILE "/var/run/dmeventd.pid"
#define DEFAULT_TIMEOUT 10
/* Commands for the daemon passed in the message below. */
enum dmeventd_command {
CMD_ACTIVE = 1,
CMD_REGISTER_FOR_EVENT,
CMD_UNREGISTER_FOR_EVENT,
CMD_GET_REGISTERED_DEVICE,
CMD_GET_NEXT_REGISTERED_DEVICE,
CMD_SET_TIMEOUT,
CMD_GET_TIMEOUT,
};
/* Message passed between client and daemon. */
struct daemon_message {
union {
unsigned int cmd;
int status;
} opcode;
char msg[252];
} __attribute__((packed));
/* Fifos for client/daemon communication. */
struct fifos {
int client;
int server;
const char *client_path;
const char *server_path;
};
/* Event type definitions. */
enum event_type {
SINGLE = 0x01, /* Report multiple errors just once. */
MULTI = 0x02, /* Report all of them. */
SECTOR_ERROR = 0x04, /* Failure on a particular sector. */
DEVICE_ERROR = 0x08, /* Device failure. */
PATH_ERROR = 0x10, /* Failure on an io path. */
ADAPTOR_ERROR = 0x20, /* Failure off a host adaptor. */
SYNC_STATUS = 0x40, /* Mirror synchronization completed/failed. */
TIMEOUT = 0x80, /* Timeout has occured */
};
#define ALL_ERRORS (SECTOR_ERROR | DEVICE_ERROR | PATH_ERROR | ADAPTOR_ERROR)
/* Prototypes for event lib interface. */
int dm_register_for_event(char *dso_name, char *device, enum event_type events);
int dm_unregister_for_event(char *dso_name, char *device,
enum event_type events);
int dm_get_registered_device(char **dso_name, char **device,
enum event_type *events, int next);
int dm_set_event_timeout(char *device, uint32_t timeout);
int dm_get_event_timeout(char *device, uint32_t *timeout);
/* Prototypes for DSO interface. */
void process_event(char *device, enum event_type event);
int register_device(char *device);
int unregister_device(char *device);
#endif
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/