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/*
* kernel/lvm-snap.h
*
* Copyright (C) 2001 Sistina Software
*
*
* LVM driver is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* LVM driver is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU CC; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
/*
* Changelog
*
* 05/01/2001:Joe Thornber - Factored this file out of lvm.c
*
*/
#ifndef LVM_SNAP_H
#define LVM_SNAP_H
/* external snapshot calls */
extern inline int lvm_get_blksize(kdev_t);
extern int lvm_snapshot_alloc(lv_t *);
extern void lvm_snapshot_fill_COW_page(vg_t *, lv_t *);
extern int lvm_snapshot_COW(kdev_t, ulong, ulong, ulong, lv_t *);
extern int lvm_snapshot_remap_block(kdev_t *, ulong *, ulong, lv_t *);
extern void lvm_snapshot_release(lv_t *);
extern int lvm_write_COW_table_block(vg_t *, lv_t *);
extern inline void lvm_hash_link(lv_block_exception_t *,
kdev_t, ulong, lv_t *);
extern int lvm_snapshot_alloc_hash_table(lv_t *);
extern void lvm_drop_snapshot(lv_t *, const char *);
#endif
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