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/*
* Copyright (C) 2005-2011 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* 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
*/
#include "lib.h"
#include "lvm2cmd.h"
#include "errors.h"
#include "libdevmapper-event.h"
#include "dmeventd_lvm.h"
#include <syslog.h> /* FIXME Replace syslog with multilog */
/* FIXME Missing openlog? */
/* FIXME Replace most syslogs with log_error() style messages and add complete context. */
/* FIXME Reformat to 80 char lines. */
static int _process_raid_event(char *params, const char *device)
{
int i, n, failure = 0;
char *p, *a[4];
char *raid_type;
char *num_devices;
char *health_chars;
char *resync_ratio;
/*
* RAID parms: <raid_type> <#raid_disks> \
* <health chars> <resync ratio>
*/
if (!dm_split_words(params, 4, 0, a)) {
syslog(LOG_ERR, "Failed to process status line for %s\n",
device);
return -EINVAL;
}
raid_type = a[0];
num_devices = a[1];
health_chars = a[2];
resync_ratio = a[3];
if (!(n = atoi(num_devices))) {
syslog(LOG_ERR, "Failed to parse number of devices for %s: %s",
device, num_devices);
return -EINVAL;
}
for (i = 0; i < n; i++) {
switch (health_chars[i]) {
case 'A':
/* Device is 'A'live and well */
case 'a':
/* Device is 'a'live, but not yet in-sync */
break;
case 'D':
syslog(LOG_ERR,
"Device #%d of %s array, %s, has failed.",
i, raid_type, device);
failure++;
break;
default:
/* Unhandled character returned from kernel */
break;
}
if (failure)
return 0; /* Don't bother parsing rest of status */
}
p = strstr(resync_ratio, "/");
if (!p) {
syslog(LOG_ERR, "Failed to parse resync_ratio for %s: %s",
device, resync_ratio);
return -EINVAL;
}
p[0] = '\0';
syslog(LOG_INFO, "%s array, %s, is %s in-sync.",
raid_type, device, strcmp(resync_ratio, p+1) ? "not" : "now");
return 0;
}
void process_event(struct dm_task *dmt,
enum dm_event_mask event __attribute__((unused)),
void **unused __attribute__((unused)))
{
void *next = NULL;
uint64_t start, length;
char *target_type = NULL;
char *params;
const char *device = dm_task_get_name(dmt);
dmeventd_lvm2_lock();
do {
next = dm_get_next_target(dmt, next, &start, &length,
&target_type, ¶ms);
if (!target_type) {
syslog(LOG_INFO, "%s mapping lost.", device);
continue;
}
if (strcmp(target_type, "raid")) {
syslog(LOG_INFO, "%s has non-raid portion.", device);
continue;
}
if (_process_raid_event(params, device))
syslog(LOG_ERR, "Failed to process event for %s",
device);
} while (next);
dmeventd_lvm2_unlock();
}
int register_device(const char *device,
const char *uuid __attribute__((unused)),
int major __attribute__((unused)),
int minor __attribute__((unused)),
void **unused __attribute__((unused)))
{
int r = dmeventd_lvm2_init();
syslog(LOG_INFO, "Monitoring RAID device %s for events.", device);
return r;
}
int unregister_device(const char *device,
const char *uuid __attribute__((unused)),
int major __attribute__((unused)),
int minor __attribute__((unused)),
void **unused __attribute__((unused)))
{
syslog(LOG_INFO, "No longer monitoring RAID device %s for events.",
device);
dmeventd_lvm2_exit();
return 1;
}
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