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lvm2/lib/filters/filter-fwraid.c
David Teigland c74ccd5201 filters: nodata option
When filter_nodata_only is set, a filter that uses
data is skipped.
2020-10-21 16:24:16 -05:00

139 lines
3.2 KiB
C

/*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "base/memory/zalloc.h"
#include "lib/misc/lib.h"
#include "lib/filters/filter.h"
#include "lib/commands/toolcontext.h"
#ifdef UDEV_SYNC_SUPPORT
#include <libudev.h>
#include "lib/device/dev-ext-udev-constants.h"
#endif
#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->ext.handle, DEV_EXT_UDEV_BLKID_TYPE);
if (value && strcmp(value, DEV_EXT_UDEV_BLKID_TYPE_SW_RAID) && strstr(value, DEV_EXT_UDEV_BLKID_TYPE_RAID_SUFFIX))
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->ext.src == DEV_EXT_NONE)
return _native_dev_is_fwraid(dev);
if (dev->ext.src == DEV_EXT_UDEV)
return _udev_dev_is_fwraid(dev);
log_error(INTERNAL_ERROR "Missing hook for firmware RAID recognition "
"using external device info source %s", dev_ext_name(dev));
return 0;
}
#define MSG_SKIPPING "%s: Skipping firmware RAID component device"
static int _ignore_fwraid(struct cmd_context *cmd, struct dev_filter *f __attribute__((unused)),
struct device *dev, const char *use_filter_name)
{
int ret;
if (cmd->filter_nodata_only)
return 1;
dev->filtered_flags &= ~DEV_FILTERED_FWRAID;
if (!fwraid_filtering())
return 1;
ret = _dev_is_fwraid(dev);
if (ret == 1) {
if (dev->ext.src == DEV_EXT_NONE)
log_debug_devs(MSG_SKIPPING, dev_name(dev));
else
log_debug_devs(MSG_SKIPPING " [%s:%p]", dev_name(dev),
dev_ext_name(dev), dev->ext.handle);
dev->filtered_flags |= DEV_FILTERED_FWRAID;
return 0;
}
if (ret < 0) {
log_debug_devs("%s: Skipping: error in firmware RAID component detection",
dev_name(dev));
dev->filtered_flags |= DEV_FILTERED_FWRAID;
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);
free(f);
}
struct dev_filter *fwraid_filter_create(struct dev_types *dt __attribute__((unused)))
{
struct dev_filter *f;
if (!(f = 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;
f->name = "fwraid";
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