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/*
* kernel/power/tuxonice_extent.h
*
* Copyright (C) 2003-2015 Nigel Cunningham (nigel at nigelcunningham com au)
*
* This file is released under the GPLv2.
*
* It contains declarations related to extents. Extents are
* TuxOnIce's method of storing some of the metadata for the image.
* See tuxonice_extent.c for more info.
*
*/
#include "tuxonice_modules.h"
#ifndef EXTENT_H
#define EXTENT_H
struct hibernate_extent {
unsigned long start, end;
struct hibernate_extent *next;
};
struct hibernate_extent_chain {
unsigned long size; /* size of the chain ie sum (max-min+1) */
int num_extents;
struct hibernate_extent *first, *last_touched;
struct hibernate_extent *current_extent;
unsigned long current_offset;
};
/* Simplify iterating through all the values in an extent chain */
#define toi_extent_for_each(extent_chain, extentpointer, value) \
if ((extent_chain)->first) \
for ((extentpointer) = (extent_chain)->first, (value) = \
(extentpointer)->start; \
((extentpointer) && ((extentpointer)->next || (value) <= \
(extentpointer)->end)); \
(((value) == (extentpointer)->end) ? \
((extentpointer) = (extentpointer)->next, (value) = \
((extentpointer) ? (extentpointer)->start : 0)) : \
(value)++))
extern void toi_put_extent_chain_from(struct hibernate_extent_chain *chain, unsigned long from);
#endif
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