linux/fs/xfs/libxfs/xfs_alloc_btree.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#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_alloc_btree.h"
#include "xfs_alloc.h"
#include "xfs_extent_busy.h"
#include "xfs_error.h"
#include "xfs_health.h"
#include "xfs_trace.h"
#include "xfs_trans.h"
#include "xfs_ag.h"

static struct kmem_cache	*xfs_allocbt_cur_cache;

STATIC struct xfs_btree_cur *
xfs_bnobt_dup_cursor(
	struct xfs_btree_cur	*cur)
{ … }

STATIC struct xfs_btree_cur *
xfs_cntbt_dup_cursor(
	struct xfs_btree_cur	*cur)
{ … }


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

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

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

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

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

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

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

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

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

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

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

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

STATIC int64_t
xfs_bnobt_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 int64_t
xfs_cntbt_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_allocbt_verify(
	struct xfs_buf		*bp)
{ … }

static void
xfs_allocbt_read_verify(
	struct xfs_buf	*bp)
{ … }

static void
xfs_allocbt_write_verify(
	struct xfs_buf	*bp)
{ … }

const struct xfs_buf_ops xfs_bnobt_buf_ops = …;

const struct xfs_buf_ops xfs_cntbt_buf_ops = …;

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

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

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

STATIC int
xfs_cntbt_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_allocbt_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_bnobt_ops = …;

const struct xfs_btree_ops xfs_cntbt_ops = …;

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

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

/*
 * Install a new free space btree root.  Caller is responsible for invalidating
 * and freeing the old btree blocks.
 */
void
xfs_allocbt_commit_staged_btree(
	struct xfs_btree_cur	*cur,
	struct xfs_trans	*tp,
	struct xfs_buf		*agbp)
{ … }

/* Calculate number of records in an alloc btree block. */
static inline unsigned int
xfs_allocbt_block_maxrecs(
	unsigned int		blocklen,
	bool			leaf)
{ … }

/*
 * Calculate number of records in an alloc btree block.
 */
unsigned int
xfs_allocbt_maxrecs(
	struct xfs_mount	*mp,
	unsigned int		blocklen,
	bool			leaf)
{ … }

/* Free space btrees are at their largest when every other block is free. */
#define XFS_MAX_FREESP_RECORDS …

/* Compute the max possible height for free space btrees. */
unsigned int
xfs_allocbt_maxlevels_ondisk(void)
{ … }

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

int __init
xfs_allocbt_init_cur_cache(void)
{ … }

void
xfs_allocbt_destroy_cur_cache(void)
{ … }