2 * Copyright (C) 2005-2007 Red Hat, Inc. All rights reserved.
4 * This file is part of the device-mapper userspace tools.
6 * This copyrighted material is made available to anyone wishing to use,
7 * modify, copy, or redistribute it subject to the terms and conditions
8 * of the GNU Lesser General Public License v.2.1.
10 * You should have received a copy of the GNU Lesser General Public License
11 * along with this program; if not, write to the Free Software Foundation,
12 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 * Note that this file is released only as part of a technology preview
17 * and its contents may change in future updates in ways that do not
18 * preserve compatibility.
27 * Event library interface.
31 DM_EVENT_SETTINGS_MASK = 0x0000FF,
32 DM_EVENT_SINGLE = 0x000001, /* Report multiple errors just once. */
33 DM_EVENT_MULTI = 0x000002, /* Report all of them. */
35 DM_EVENT_ERROR_MASK = 0x00FF00,
36 DM_EVENT_SECTOR_ERROR = 0x000100, /* Failure on a particular sector. */
37 DM_EVENT_DEVICE_ERROR = 0x000200, /* Device failure. */
38 DM_EVENT_PATH_ERROR = 0x000400, /* Failure on an io path. */
39 DM_EVENT_ADAPTOR_ERROR = 0x000800, /* Failure of a host adaptor. */
41 DM_EVENT_STATUS_MASK = 0xFF0000,
42 DM_EVENT_SYNC_STATUS = 0x010000, /* Mirror synchronization completed/failed. */
43 DM_EVENT_TIMEOUT = 0x020000, /* Timeout has occured */
45 DM_EVENT_REGISTRATION_PENDING = 0x1000000, /* Monitor thread is setting-up/shutting-down */
48 #define DM_EVENT_ALL_ERRORS DM_EVENT_ERROR_MASK
50 struct dm_event_handler;
52 struct dm_event_handler *dm_event_handler_create(void);
53 void dm_event_handler_destroy(struct dm_event_handler *dmevh);
56 * Path of shared library to handle events.
58 * All of dmeventd, dso, device_name and uuid strings are duplicated so
59 * you do not need to keep the pointers valid after the call succeeds.
60 * They may return -ENOMEM though.
62 int dm_event_handler_set_dso(struct dm_event_handler *dmevh, const char *path);
65 * Path of dmeventd binary.
67 int dm_event_handler_set_dmeventd_path(struct dm_event_handler *dmevh, const char *dmeventd_path);
70 * Identify the device to monitor by exactly one of device_name, uuid or
71 * device number. String arguments are duplicated, see above.
73 int dm_event_handler_set_dev_name(struct dm_event_handler *dmevh, const char *device_name);
75 int dm_event_handler_set_uuid(struct dm_event_handler *dmevh, const char *uuid);
77 void dm_event_handler_set_major(struct dm_event_handler *dmevh, int major);
78 void dm_event_handler_set_minor(struct dm_event_handler *dmevh, int minor);
79 void dm_event_handler_set_timeout(struct dm_event_handler *dmevh, int timeout);
82 * Specify mask for events to monitor.
84 void dm_event_handler_set_event_mask(struct dm_event_handler *dmevh,
85 enum dm_event_mask evmask);
87 const char *dm_event_handler_get_dso(const struct dm_event_handler *dmevh);
88 const char *dm_event_handler_get_dev_name(const struct dm_event_handler *dmevh);
89 const char *dm_event_handler_get_uuid(const struct dm_event_handler *dmevh);
90 int dm_event_handler_get_major(const struct dm_event_handler *dmevh);
91 int dm_event_handler_get_minor(const struct dm_event_handler *dmevh);
92 int dm_event_handler_get_timeout(const struct dm_event_handler *dmevh);
93 enum dm_event_mask dm_event_handler_get_event_mask(const struct dm_event_handler *dmevh);
95 /* FIXME Review interface (what about this next thing?) */
96 int dm_event_get_registered_device(struct dm_event_handler *dmevh, int next);
99 * Initiate monitoring using dmeventd.
101 int dm_event_register_handler(const struct dm_event_handler *dmevh);
102 int dm_event_unregister_handler(const struct dm_event_handler *dmevh);
104 /* Prototypes for DSO interface, see dmeventd.c, struct dso_data for
105 detailed descriptions. */
106 void process_event(struct dm_task *dmt, enum dm_event_mask evmask, void **user);
107 int register_device(const char *device_name, const char *uuid, int major, int minor, void **user);
108 int unregister_device(const char *device_name, const char *uuid, int major,
109 int minor, void **user);