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/*
* Copyright (C) 2014 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 "filter.h"
#ifdef __linux__
#ifdef UDEV_SYNC_SUPPORT
static int _udev_dev_is_fwraid(struct device *dev)
{
const char *value;
value = udev_device_get_property_value((struct udev_device *)dev->aux_status.handle, "ID_FS_TYPE");
if (value && strcmp(value, "linux_raid_member") && strstr(value, "_raid_member"))
return 1;
return 0;
}
#else
static int _udev_dev_is_fwraid(struct device *dev)
{
return 0;
}
#endif
static int _native_dev_is_fwraid(struct device *dev)
{
log_verbose("%s: Firmware RAID detection is not supported by LVM natively. "
"Skipping firmware raid detection. ", dev_name(dev));
return 0;
}
static int _dev_is_fwraid(struct device *dev)
{
if (dev_aux_status_use_native(&dev->aux_status, dev_name(dev)))
return _native_dev_is_fwraid(dev);
if (dev->aux_status.source == DEV_AUX_STATUS_SRC_UDEV)
return _udev_dev_is_fwraid(dev);
log_error(INTERNAL_ERROR "Missing hook for firmware RAID recognition "
"using auxiliary device status source %s",
dev_aux_status_source_name(dev->aux_status.source));
return 0;
}
static int _ignore_fwraid(struct dev_filter *f __attribute__((unused)),
struct device *dev)
{
int ret;
if (!fwraid_filtering())
return 1;
ret = _dev_is_fwraid(dev);
if (ret == 1) {
log_debug_devs("%s: Skipping firmware RAID component device [aux:%s/%p]",
dev_name(dev),
dev_aux_status_source_name_used(&dev->aux_status),
dev->aux_status.handle);
return 0;
}
if (ret < 0) {
log_debug_devs("%s: Skipping: error in firmware RAID component detection",
dev_name(dev));
return 0;
}
return 1;
}
static void _destroy(struct dev_filter *f)
{
if (f->use_count)
log_error(INTERNAL_ERROR "Destroying firmware RAID filter while in use %u times.", f->use_count);
dm_free(f);
}
struct dev_filter *fwraid_filter_create(struct dev_types *dt __attribute__((unused)))
{
struct dev_filter *f;
if (!(f = dm_zalloc(sizeof(*f)))) {
log_error("Firmware RAID filter allocation failed");
return NULL;
}
f->passes_filter = _ignore_fwraid;
f->destroy = _destroy;
f->use_count = 0;
f->private = NULL;
log_debug_devs("Firmware RAID filter initialised.");
return f;
}
#else
struct dev_filter *fwraid_filter_create(struct dev_types *dt __attribute__((unused)))
{
return NULL;
}
#endif
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