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5469414bf8
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.
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
/*
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* Copyright (C) 2005 Red Hat, Inc. All rights reserved.
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*
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* This file is part of the device-mapper userspace tools.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef LIB_DMEVENT_H
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#define LIB_DMEVENT_H
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#include "list.h"
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#include <stdint.h>
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#define DAEMON "/sbin/dmeventd"
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#define LOCKFILE "/var/lock/dmeventd"
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#define FIFO_CLIENT "/var/run/dmeventd-client"
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#define FIFO_SERVER "/var/run/dmeventd-server"
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#define PIDFILE "/var/run/dmeventd.pid"
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#define DEFAULT_TIMEOUT 10
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/* Commands for the daemon passed in the message below. */
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enum dmeventd_command {
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CMD_ACTIVE = 1,
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CMD_REGISTER_FOR_EVENT,
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CMD_UNREGISTER_FOR_EVENT,
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CMD_GET_REGISTERED_DEVICE,
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CMD_GET_NEXT_REGISTERED_DEVICE,
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CMD_SET_TIMEOUT,
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CMD_GET_TIMEOUT,
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};
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/* Message passed between client and daemon. */
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struct daemon_message {
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union {
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unsigned int cmd;
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int status;
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} opcode;
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char msg[252];
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} __attribute__((packed));
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/* Fifos for client/daemon communication. */
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struct fifos {
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int client;
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int server;
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const char *client_path;
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const char *server_path;
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};
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/* Event type definitions. */
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enum event_type {
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SINGLE = 0x01, /* Report multiple errors just once. */
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MULTI = 0x02, /* Report all of them. */
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SECTOR_ERROR = 0x04, /* Failure on a particular sector. */
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DEVICE_ERROR = 0x08, /* Device failure. */
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PATH_ERROR = 0x10, /* Failure on an io path. */
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ADAPTOR_ERROR = 0x20, /* Failure off a host adaptor. */
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SYNC_STATUS = 0x40, /* Mirror synchronization completed/failed. */
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TIMEOUT = 0x80, /* Timeout has occured */
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};
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#define ALL_ERRORS (SECTOR_ERROR | DEVICE_ERROR | PATH_ERROR | ADAPTOR_ERROR)
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/* Prototypes for event lib interface. */
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int dm_register_for_event(char *dso_name, char *device, enum event_type events);
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int dm_unregister_for_event(char *dso_name, char *device,
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enum event_type events);
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int dm_get_registered_device(char **dso_name, char **device,
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enum event_type *events, int next);
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int dm_set_event_timeout(char *device, uint32_t timeout);
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int dm_get_event_timeout(char *device, uint32_t *timeout);
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/* Prototypes for DSO interface. */
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void process_event(char *device, enum event_type event);
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int register_device(char *device);
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int unregister_device(char *device);
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#endif
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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