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/*
* Copyright (C) 2006 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"
static DM_LIST_INIT(_allow_devs);
int internal_filter_allow(struct dm_pool *mem, struct device *dev)
{
struct device_list *devl;
if (!(devl = dm_pool_alloc(mem, sizeof(*devl)))) {
log_error("device_list element allocation failed");
return 0;
}
devl->dev = dev;
dm_list_add(&_allow_devs, &devl->list);
return 1;
}
void internal_filter_clear(void)
{
dm_list_init(&_allow_devs);
}
static int _passes_internal(struct cmd_context *cmd, struct dev_filter *f __attribute__((unused)),
struct device *dev, const char *use_filter_name)
{
struct device_list *devl;
dev->filtered_flags &= ~DEV_FILTERED_INTERNAL;
if (!internal_filtering())
return 1;
dm_list_iterate_items(devl, &_allow_devs) {
if (devl->dev == dev)
return 1;
}
dev->filtered_flags |= DEV_FILTERED_INTERNAL;
log_debug_devs("%s: Skipping for internal filtering.", dev_name(dev));
return 0;
}
static void _destroy(struct dev_filter *f)
{
if (f->use_count)
log_error(INTERNAL_ERROR "Destroying internal filter while in use %u times.", f->use_count);
free(f);
}
struct dev_filter *internal_filter_create(void)
{
struct dev_filter *f;
if (!(f = zalloc(sizeof(*f)))) {
log_error("md filter allocation failed");
return NULL;
}
f->passes_filter = _passes_internal;
f->destroy = _destroy;
f->use_count = 0;
f->name = "internal";
log_debug_devs("Internal filter initialised.");
return f;
}
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