mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-21 13:34:40 +03:00
6cb0b44cd2
The case of filters returning EAGAIN and using the FILTER_AFTER_SCAN flag is no longer used.
101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/*
|
|
* Copyright (C) 2004 Luca Berra
|
|
* Copyright (C) 2004-2006 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"
|
|
#include "lib/commands/toolcontext.h"
|
|
|
|
#ifdef __linux__
|
|
|
|
#define BUFSIZE 4096
|
|
|
|
static int _ignore_signature(struct cmd_context *cmd, struct dev_filter *f __attribute__((unused)),
|
|
struct device *dev, const char *use_filter_name)
|
|
{
|
|
char buf[BUFSIZE];
|
|
int ret = 0;
|
|
|
|
if (cmd->filter_nodata_only)
|
|
return 1;
|
|
|
|
dev->filtered_flags &= ~DEV_FILTERED_SIGNATURE;
|
|
|
|
memset(buf, 0, BUFSIZE);
|
|
|
|
if (!dev_read_bytes(dev, 0, BUFSIZE, buf)) {
|
|
log_debug_devs("%s: Skipping: error in signature detection",
|
|
dev_name(dev));
|
|
ret = 0;
|
|
dev->filtered_flags |= DEV_FILTERED_SIGNATURE;
|
|
goto out;
|
|
}
|
|
|
|
if (dev_is_lvm1(dev, buf, BUFSIZE)) {
|
|
log_debug_devs("%s: Skipping lvm1 device", dev_name(dev));
|
|
ret = 0;
|
|
dev->filtered_flags |= DEV_FILTERED_SIGNATURE;
|
|
goto out;
|
|
}
|
|
|
|
if (dev_is_pool(dev, buf, BUFSIZE)) {
|
|
log_debug_devs("%s: Skipping gfs-pool device", dev_name(dev));
|
|
ret = 0;
|
|
dev->filtered_flags |= DEV_FILTERED_SIGNATURE;
|
|
goto out;
|
|
}
|
|
ret = 1;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void _destroy(struct dev_filter *f)
|
|
{
|
|
if (f->use_count)
|
|
log_error(INTERNAL_ERROR "Destroying signature filter while in use %u times.", f->use_count);
|
|
|
|
free(f);
|
|
}
|
|
|
|
struct dev_filter *signature_filter_create(struct dev_types *dt)
|
|
{
|
|
struct dev_filter *f;
|
|
|
|
if (!(f = zalloc(sizeof(*f)))) {
|
|
log_error("md filter allocation failed");
|
|
return NULL;
|
|
}
|
|
|
|
f->passes_filter = _ignore_signature;
|
|
f->destroy = _destroy;
|
|
f->use_count = 0;
|
|
f->private = dt;
|
|
f->name = "signature";
|
|
|
|
log_debug_devs("signature filter initialised.");
|
|
|
|
return f;
|
|
}
|
|
|
|
#else
|
|
|
|
struct dev_filter *signature_filter_create(struct dev_types *dt)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#endif
|