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/*
* Copyright (C) 2005-2007 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
*/
/*
* Note that this file is released only as part of a technology preview
* and its contents may change in future updates in ways that do not
* preserve compatibility.
*/
#ifndef LIB_DMEVENT_H
#define LIB_DMEVENT_H
#include <stdint.h>
/*
* Event library interface.
*/
enum dm_event_mask {
DM_EVENT_SETTINGS_MASK = 0x0000FF,
DM_EVENT_SINGLE = 0x000001, /* Report multiple errors just once. */
DM_EVENT_MULTI = 0x000002, /* Report all of them. */
DM_EVENT_ERROR_MASK = 0x00FF00,
DM_EVENT_SECTOR_ERROR = 0x000100, /* Failure on a particular sector. */
DM_EVENT_DEVICE_ERROR = 0x000200, /* Device failure. */
DM_EVENT_PATH_ERROR = 0x000400, /* Failure on an io path. */
DM_EVENT_ADAPTOR_ERROR = 0x000800, /* Failure of a host adaptor. */
DM_EVENT_STATUS_MASK = 0xFF0000,
DM_EVENT_SYNC_STATUS = 0x010000, /* Mirror synchronization completed/failed. */
DM_EVENT_TIMEOUT = 0x020000, /* Timeout has occured */
DM_EVENT_REGISTRATION_PENDING = 0x1000000, /* Monitor thread is setting-up/shutting-down */
};
#define DM_EVENT_ALL_ERRORS DM_EVENT_ERROR_MASK
struct dm_event_handler;
struct dm_event_handler *dm_event_handler_create(void);
void dm_event_handler_destroy(struct dm_event_handler *dmevh);
/*
* Path of shared library to handle events.
*
* All of dso, device_name and uuid strings are duplicated, you do not
* need to keep the pointers valid after the call succeeds. Thes may
* return -ENOMEM though.
*/
int dm_event_handler_set_dso(struct dm_event_handler *dmevh, const char *path);
/*
* Identify the device to monitor by exactly one of device_name, uuid or
* device number. String arguments are duplicated, see above.
*/
int dm_event_handler_set_dev_name(struct dm_event_handler *dmevh, const char *device_name);
int dm_event_handler_set_uuid(struct dm_event_handler *dmevh, const char *uuid);
void dm_event_handler_set_major(struct dm_event_handler *dmevh, int major);
void dm_event_handler_set_minor(struct dm_event_handler *dmevh, int minor);
void dm_event_handler_set_timeout(struct dm_event_handler *dmevh, int timeout);
/*
* Specify mask for events to monitor.
*/
void dm_event_handler_set_event_mask(struct dm_event_handler *dmevh,
enum dm_event_mask evmask);
const char *dm_event_handler_get_dso(const struct dm_event_handler *dmevh);
const char *dm_event_handler_get_dev_name(const struct dm_event_handler *dmevh);
const char *dm_event_handler_get_uuid(const struct dm_event_handler *dmevh);
int dm_event_handler_get_major(const struct dm_event_handler *dmevh);
int dm_event_handler_get_minor(const struct dm_event_handler *dmevh);
int dm_event_handler_get_timeout(const struct dm_event_handler *dmevh);
enum dm_event_mask dm_event_handler_get_event_mask(const struct dm_event_handler *dmevh);
/* FIXME Review interface (what about this next thing?) */
int dm_event_get_registered_device(struct dm_event_handler *dmevh, int next);
/*
* Initiate monitoring using dmeventd.
*/
int dm_event_register_handler(const struct dm_event_handler *dmevh);
int dm_event_unregister_handler(const struct dm_event_handler *dmevh);
/* Prototypes for DSO interface, see dmeventd.c, struct dso_data for
detailed descriptions. */
void process_event(struct dm_task *dmt, enum dm_event_mask evmask, void **user);
int register_device(const char *device_name, const char *uuid, int major, int minor, void **user);
int unregister_device(const char *device_name, const char *uuid, int major,
int minor, void **user);
#endif
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