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-rw-r--r--kernel/power/tuxonice_extent.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/kernel/power/tuxonice_extent.h b/kernel/power/tuxonice_extent.h
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+++ b/kernel/power/tuxonice_extent.h
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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