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81 lines
1.6 KiB
C
81 lines
1.6 KiB
C
/*
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* Copyright (C) 2004 Luca Berra
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "lib.h"
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#include "filter-md.h"
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#include "metadata.h"
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#ifdef linux
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/* Lifted from <linux/raid/md_p.h> because of difficulty including it */
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#define MD_SB_MAGIC 0xa92b4efc
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#define MD_RESERVED_BYTES (64 * 1024)
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#define MD_RESERVED_SECTORS (MD_RESERVED_BYTES / 512)
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#define MD_NEW_SIZE_SECTORS(x) ((x & ~(MD_RESERVED_SECTORS - 1)) \
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- MD_RESERVED_SECTORS)
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static int _ignore_md(struct dev_filter *f, struct device *dev)
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{
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int ret;
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if (!md_filtering())
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return 1;
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ret = dev_is_md(dev, NULL);
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if (ret == 1) {
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log_debug("%s: Skipping md component device", dev_name(dev));
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return 0;
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}
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if (ret < 0) {
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log_debug("%s: Skipping: error in md component detection",
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dev_name(dev));
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return 0;
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}
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return 1;
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}
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static void _destroy(struct dev_filter *f)
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{
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dm_free(f);
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}
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struct dev_filter *md_filter_create(void)
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{
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struct dev_filter *f;
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if (!(f = dm_malloc(sizeof(*f)))) {
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log_error("md filter allocation failed");
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return NULL;
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}
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f->passes_filter = _ignore_md;
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f->destroy = _destroy;
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f->private = NULL;
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return f;
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}
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#else
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struct dev_filter *md_filter_create(void)
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{
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return NULL;
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}
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#endif
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