cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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btree.h (2080B)

      1/* SPDX-License-Identifier: GPL-2.0+ */
      2/*
      3 * NILFS B-tree.
      4 *
      5 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
      6 *
      7 * Written by Koji Sato.
      8 */
      9
     10#ifndef _NILFS_BTREE_H
     11#define _NILFS_BTREE_H
     12
     13#include <linux/types.h>
     14#include <linux/buffer_head.h>
     15#include <linux/list.h>
     16#include <linux/nilfs2_ondisk.h>	/* nilfs_btree_node */
     17#include "btnode.h"
     18#include "bmap.h"
     19
     20/**
     21 * struct nilfs_btree_path - A path on which B-tree operations are executed
     22 * @bp_bh: buffer head of node block
     23 * @bp_sib_bh: buffer head of sibling node block
     24 * @bp_index: index of child node
     25 * @bp_oldreq: ptr end request for old ptr
     26 * @bp_newreq: ptr alloc request for new ptr
     27 * @bp_op: rebalance operation
     28 */
     29struct nilfs_btree_path {
     30	struct buffer_head *bp_bh;
     31	struct buffer_head *bp_sib_bh;
     32	int bp_index;
     33	union nilfs_bmap_ptr_req bp_oldreq;
     34	union nilfs_bmap_ptr_req bp_newreq;
     35	struct nilfs_btnode_chkey_ctxt bp_ctxt;
     36	void (*bp_op)(struct nilfs_bmap *, struct nilfs_btree_path *,
     37		      int, __u64 *, __u64 *);
     38};
     39
     40#define NILFS_BTREE_ROOT_SIZE		NILFS_BMAP_SIZE
     41#define NILFS_BTREE_ROOT_NCHILDREN_MAX					\
     42	((NILFS_BTREE_ROOT_SIZE - sizeof(struct nilfs_btree_node)) /	\
     43	 (sizeof(__le64 /* dkey */) + sizeof(__le64 /* dptr */)))
     44#define NILFS_BTREE_ROOT_NCHILDREN_MIN	0
     45#define NILFS_BTREE_NODE_EXTRA_PAD_SIZE	(sizeof(__le64))
     46#define NILFS_BTREE_NODE_NCHILDREN_MAX(nodesize)			\
     47	(((nodesize) - sizeof(struct nilfs_btree_node) -		\
     48		NILFS_BTREE_NODE_EXTRA_PAD_SIZE) /			\
     49	 (sizeof(__le64 /* dkey */) + sizeof(__le64 /* dptr */)))
     50#define NILFS_BTREE_NODE_NCHILDREN_MIN(nodesize)			\
     51	((NILFS_BTREE_NODE_NCHILDREN_MAX(nodesize) - 1) / 2 + 1)
     52#define NILFS_BTREE_KEY_MIN	((__u64)0)
     53#define NILFS_BTREE_KEY_MAX	(~(__u64)0)
     54
     55extern struct kmem_cache *nilfs_btree_path_cache;
     56
     57int nilfs_btree_init(struct nilfs_bmap *);
     58int nilfs_btree_convert_and_insert(struct nilfs_bmap *, __u64, __u64,
     59				   const __u64 *, const __u64 *, int);
     60void nilfs_btree_init_gc(struct nilfs_bmap *);
     61
     62int nilfs_btree_broken_node_block(struct buffer_head *bh);
     63
     64#endif	/* _NILFS_BTREE_H */