linux/fs/xfs/libxfs/xfs_refcount_btree.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2016 Oracle.  All Rights Reserved.
 * Author: Darrick J. Wong <[email protected]>
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_btree.h"
#include "xfs_btree_staging.h"
#include "xfs_refcount_btree.h"
#include "xfs_refcount.h"
#include "xfs_alloc.h"
#include "xfs_error.h"
#include "xfs_health.h"
#include "xfs_trace.h"
#include "xfs_trans.h"
#include "xfs_bit.h"
#include "xfs_rmap.h"
#include "xfs_ag.h"

static struct kmem_cache	*xfs_refcountbt_cur_cache;

static struct xfs_btree_cur *
xfs_refcountbt_dup_cursor(
	struct xfs_btree_cur	*cur)
{ … }

STATIC void
xfs_refcountbt_set_root(
	struct xfs_btree_cur		*cur,
	const union xfs_btree_ptr	*ptr,
	int				inc)
{ … }

STATIC int
xfs_refcountbt_alloc_block(
	struct xfs_btree_cur		*cur,
	const union xfs_btree_ptr	*start,
	union xfs_btree_ptr		*new,
	int				*stat)
{ … }

STATIC int
xfs_refcountbt_free_block(
	struct xfs_btree_cur	*cur,
	struct xfs_buf		*bp)
{ … }

STATIC int
xfs_refcountbt_get_minrecs(
	struct xfs_btree_cur	*cur,
	int			level)
{ … }

STATIC int
xfs_refcountbt_get_maxrecs(
	struct xfs_btree_cur	*cur,
	int			level)
{ … }

STATIC void
xfs_refcountbt_init_key_from_rec(
	union xfs_btree_key		*key,
	const union xfs_btree_rec	*rec)
{ … }

STATIC void
xfs_refcountbt_init_high_key_from_rec(
	union xfs_btree_key		*key,
	const union xfs_btree_rec	*rec)
{ … }

STATIC void
xfs_refcountbt_init_rec_from_cur(
	struct xfs_btree_cur	*cur,
	union xfs_btree_rec	*rec)
{ … }

STATIC void
xfs_refcountbt_init_ptr_from_cur(
	struct xfs_btree_cur	*cur,
	union xfs_btree_ptr	*ptr)
{ … }

STATIC int64_t
xfs_refcountbt_key_diff(
	struct xfs_btree_cur		*cur,
	const union xfs_btree_key	*key)
{ … }

STATIC int64_t
xfs_refcountbt_diff_two_keys(
	struct xfs_btree_cur		*cur,
	const union xfs_btree_key	*k1,
	const union xfs_btree_key	*k2,
	const union xfs_btree_key	*mask)
{ … }

STATIC xfs_failaddr_t
xfs_refcountbt_verify(
	struct xfs_buf		*bp)
{ … }

STATIC void
xfs_refcountbt_read_verify(
	struct xfs_buf	*bp)
{ … }

STATIC void
xfs_refcountbt_write_verify(
	struct xfs_buf	*bp)
{ … }

const struct xfs_buf_ops xfs_refcountbt_buf_ops = …;

STATIC int
xfs_refcountbt_keys_inorder(
	struct xfs_btree_cur		*cur,
	const union xfs_btree_key	*k1,
	const union xfs_btree_key	*k2)
{ … }

STATIC int
xfs_refcountbt_recs_inorder(
	struct xfs_btree_cur		*cur,
	const union xfs_btree_rec	*r1,
	const union xfs_btree_rec	*r2)
{ … }

STATIC enum xbtree_key_contig
xfs_refcountbt_keys_contiguous(
	struct xfs_btree_cur		*cur,
	const union xfs_btree_key	*key1,
	const union xfs_btree_key	*key2,
	const union xfs_btree_key	*mask)
{ … }

const struct xfs_btree_ops xfs_refcountbt_ops = …;

/*
 * Create a new refcount btree cursor.
 *
 * For staging cursors tp and agbp are NULL.
 */
struct xfs_btree_cur *
xfs_refcountbt_init_cursor(
	struct xfs_mount	*mp,
	struct xfs_trans	*tp,
	struct xfs_buf		*agbp,
	struct xfs_perag	*pag)
{ … }

/*
 * Swap in the new btree root.  Once we pass this point the newly rebuilt btree
 * is in place and we have to kill off all the old btree blocks.
 */
void
xfs_refcountbt_commit_staged_btree(
	struct xfs_btree_cur	*cur,
	struct xfs_trans	*tp,
	struct xfs_buf		*agbp)
{ … }

/* Calculate number of records in a refcount btree block. */
static inline unsigned int
xfs_refcountbt_block_maxrecs(
	unsigned int		blocklen,
	bool			leaf)
{ … }

/*
 * Calculate the number of records in a refcount btree block.
 */
unsigned int
xfs_refcountbt_maxrecs(
	struct xfs_mount	*mp,
	unsigned int		blocklen,
	bool			leaf)
{ … }

/* Compute the max possible height of the maximally sized refcount btree. */
unsigned int
xfs_refcountbt_maxlevels_ondisk(void)
{ … }

/* Compute the maximum height of a refcount btree. */
void
xfs_refcountbt_compute_maxlevels(
	struct xfs_mount		*mp)
{ … }

/* Calculate the refcount btree size for some records. */
xfs_extlen_t
xfs_refcountbt_calc_size(
	struct xfs_mount	*mp,
	unsigned long long	len)
{ … }

/*
 * Calculate the maximum refcount btree size.
 */
xfs_extlen_t
xfs_refcountbt_max_size(
	struct xfs_mount	*mp,
	xfs_agblock_t		agblocks)
{ … }

/*
 * Figure out how many blocks to reserve and how many are used by this btree.
 */
int
xfs_refcountbt_calc_reserves(
	struct xfs_mount	*mp,
	struct xfs_trans	*tp,
	struct xfs_perag	*pag,
	xfs_extlen_t		*ask,
	xfs_extlen_t		*used)
{ … }

int __init
xfs_refcountbt_init_cur_cache(void)
{ … }

void
xfs_refcountbt_destroy_cur_cache(void)
{ … }