xfs_ialloc_btree.c | Explore in Territory

// 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_bit.h"
#include "xfs_mount.h"
#include "xfs_btree.h"
#include "xfs_btree_staging.h"
#include "xfs_ialloc.h"
#include "xfs_ialloc_btree.h"
#include "xfs_alloc.h"
#include "xfs_error.h"
#include "xfs_health.h"
#include "xfs_trace.h"
#include "xfs_trans.h"
#include "xfs_rmap.h"
#include "xfs_ag.h"

static struct kmem_cache	*xfs_inobt_cur_cache;

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

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

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

STATIC void
xfs_inobt_set_root(
	struct xfs_btree_cur		*cur,
	const union xfs_btree_ptr	*nptr,
	int				inc)	/* level change */
{ … }

STATIC void
xfs_finobt_set_root(
	struct xfs_btree_cur		*cur,
	const union xfs_btree_ptr	*nptr,
	int				inc)	/* level change */
{ … }

/* Update the inode btree block counter for this btree. */
static inline void
xfs_inobt_mod_blockcount(
	struct xfs_btree_cur	*cur,
	int			howmuch)
{ … }

STATIC int
__xfs_inobt_alloc_block(
	struct xfs_btree_cur		*cur,
	const union xfs_btree_ptr	*start,
	union xfs_btree_ptr		*new,
	int				*stat,
	enum xfs_ag_resv_type		resv)
{ … }

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

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

STATIC int
__xfs_inobt_free_block(
	struct xfs_btree_cur	*cur,
	struct xfs_buf		*bp,
	enum xfs_ag_resv_type	resv)
{ … }

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

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

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

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

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

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

/*
 * initial value of ptr for lookup
 */
STATIC void
xfs_inobt_init_ptr_from_cur(
	struct xfs_btree_cur	*cur,
	union xfs_btree_ptr	*ptr)
{ … }

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

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

STATIC int64_t
xfs_inobt_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_inobt_verify(
	struct xfs_buf		*bp)
{ … }

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

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

const struct xfs_buf_ops xfs_inobt_buf_ops = …;

const struct xfs_buf_ops xfs_finobt_buf_ops = …;

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

STATIC int
xfs_inobt_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_inobt_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_inobt_ops = …;

const struct xfs_btree_ops xfs_finobt_ops = …;

/*
 * Create an inode btree cursor.
 *
 * For staging cursors tp and agbp are NULL.
 */
struct xfs_btree_cur *
xfs_inobt_init_cursor(
	struct xfs_perag	*pag,
	struct xfs_trans	*tp,
	struct xfs_buf		*agbp)
{ … }

/*
 * Create a free inode btree cursor.
 *
 * For staging cursors tp and agbp are NULL.
 */
struct xfs_btree_cur *
xfs_finobt_init_cursor(
	struct xfs_perag	*pag,
	struct xfs_trans	*tp,
	struct xfs_buf		*agbp)
{ … }

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

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

/*
 * Calculate number of records in an inobt btree block.
 */
int
xfs_inobt_maxrecs(
	struct xfs_mount	*mp,
	int			blocklen,
	int			leaf)
{ … }

/*
 * Maximum number of inode btree records per AG.  Pretend that we can fill an
 * entire AG completely full of inodes except for the AG headers.
 */
#define XFS_MAX_INODE_RECORDS …

/* Compute the max possible height for the inode btree. */
static inline unsigned int
xfs_inobt_maxlevels_ondisk(void)
{ … }

/* Compute the max possible height for the free inode btree. */
static inline unsigned int
xfs_finobt_maxlevels_ondisk(void)
{ … }

/* Compute the max possible height for either inode btree. */
unsigned int
xfs_iallocbt_maxlevels_ondisk(void)
{ … }

/*
 * Convert the inode record holemask to an inode allocation bitmap. The inode
 * allocation bitmap is inode granularity and specifies whether an inode is
 * physically allocated on disk (not whether the inode is considered allocated
 * or free by the fs).
 *
 * A bit value of 1 means the inode is allocated, a value of 0 means it is free.
 */
uint64_t
xfs_inobt_irec_to_allocmask(
	const struct xfs_inobt_rec_incore	*rec)
{ … }

#if defined(DEBUG) || defined(XFS_WARN)
/*
 * Verify that an in-core inode record has a valid inode count.
 */
int
xfs_inobt_rec_check_count(
	struct xfs_mount		*mp,
	struct xfs_inobt_rec_incore	*rec)
{ … }
#endif	/* DEBUG */

static xfs_extlen_t
xfs_inobt_max_size(
	struct xfs_perag	*pag)
{ … }

static int
xfs_finobt_count_blocks(
	struct xfs_perag	*pag,
	struct xfs_trans	*tp,
	xfs_extlen_t		*tree_blocks)
{ … }

/* Read finobt block count from AGI header. */
static int
xfs_finobt_read_blocks(
	struct xfs_perag	*pag,
	struct xfs_trans	*tp,
	xfs_extlen_t		*tree_blocks)
{ … }

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

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

int __init
xfs_inobt_init_cur_cache(void)
{ … }

void
xfs_inobt_destroy_cur_cache(void)
{ … }
linux/fs/xfs/libxfs/xfs_ialloc_btree.c
