linux/drivers/md/persistent-data/dm-btree-spine.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2011 Red Hat, Inc.
 *
 * This file is released under the GPL.
 */

#include "dm-btree-internal.h"
#include "dm-transaction-manager.h"

#include <linux/device-mapper.h>

#define DM_MSG_PREFIX …

/*----------------------------------------------------------------*/

#define BTREE_CSUM_XOR …

static void node_prepare_for_write(const struct dm_block_validator *v,
				   struct dm_block *b,
				   size_t block_size)
{ … }

static int node_check(const struct dm_block_validator *v,
		      struct dm_block *b,
		      size_t block_size)
{ … }

const struct dm_block_validator btree_node_validator = …;

/*----------------------------------------------------------------*/

int bn_read_lock(struct dm_btree_info *info, dm_block_t b,
		 struct dm_block **result)
{ … }

static int bn_shadow(struct dm_btree_info *info, dm_block_t orig,
	      struct dm_btree_value_type *vt,
	      struct dm_block **result)
{ … }

int new_block(struct dm_btree_info *info, struct dm_block **result)
{ … }

void unlock_block(struct dm_btree_info *info, struct dm_block *b)
{ … }

/*----------------------------------------------------------------*/

void init_ro_spine(struct ro_spine *s, struct dm_btree_info *info)
{ … }

void exit_ro_spine(struct ro_spine *s)
{ … }

int ro_step(struct ro_spine *s, dm_block_t new_child)
{ … }

void ro_pop(struct ro_spine *s)
{ … }

struct btree_node *ro_node(struct ro_spine *s)
{ … }

/*----------------------------------------------------------------*/

void init_shadow_spine(struct shadow_spine *s, struct dm_btree_info *info)
{ … }

void exit_shadow_spine(struct shadow_spine *s)
{ … }

int shadow_step(struct shadow_spine *s, dm_block_t b,
		struct dm_btree_value_type *vt)
{ … }

struct dm_block *shadow_current(struct shadow_spine *s)
{ … }

struct dm_block *shadow_parent(struct shadow_spine *s)
{ … }

int shadow_has_parent(struct shadow_spine *s)
{ … }

dm_block_t shadow_root(struct shadow_spine *s)
{ … }

static void le64_inc(void *context, const void *value_le, unsigned int count)
{ … }

static void le64_dec(void *context, const void *value_le, unsigned int count)
{ … }

static int le64_equal(void *context, const void *value1_le, const void *value2_le)
{ … }

void init_le64_type(struct dm_transaction_manager *tm,
		    struct dm_btree_value_type *vt)
{ … }