LXR linux/fs/xfs/libxfs/xfs_ialloc

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
   4 * All Rights Reserved.
   5 */
   6#ifndef __XFS_IALLOC_BTREE_H__
   7#define __XFS_IALLOC_BTREE_H__
   8
   9/*
  10 * Inode map on-disk structures
  11 */
  12
  13struct xfs_buf;
  14struct xfs_btree_cur;
  15struct xfs_mount;
  16
  17/*
  18 * Btree block header size depends on a superblock flag.
  19 */
  20#define XFS_INOBT_BLOCK_LEN(mp) \
  21        (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
  22                XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)
  23
  24/*
  25 * Record, key, and pointer address macros for btree blocks.
  26 *
  27 * (note that some of these may appear unused, but they are used in userspace)
  28 */
  29#define XFS_INOBT_REC_ADDR(mp, block, index) \
  30        ((xfs_inobt_rec_t *) \
  31                ((char *)(block) + \
  32                 XFS_INOBT_BLOCK_LEN(mp) + \
  33                 (((index) - 1) * sizeof(xfs_inobt_rec_t))))
  34
  35#define XFS_INOBT_KEY_ADDR(mp, block, index) \
  36        ((xfs_inobt_key_t *) \
  37                ((char *)(block) + \
  38                 XFS_INOBT_BLOCK_LEN(mp) + \
  39                 ((index) - 1) * sizeof(xfs_inobt_key_t)))
  40
  41#define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \
  42        ((xfs_inobt_ptr_t *) \
  43                ((char *)(block) + \
  44                 XFS_INOBT_BLOCK_LEN(mp) + \
  45                 (maxrecs) * sizeof(xfs_inobt_key_t) + \
  46                 ((index) - 1) * sizeof(xfs_inobt_ptr_t)))
  47
  48extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *,
  49                struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t,
  50                xfs_btnum_t);
  51struct xfs_btree_cur *xfs_inobt_stage_cursor(struct xfs_mount *mp,
  52                struct xbtree_afakeroot *afake, xfs_agnumber_t agno,
  53                xfs_btnum_t btnum);
  54extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
  55
  56/* ir_holemask to inode allocation bitmap conversion */
  57uint64_t xfs_inobt_irec_to_allocmask(struct xfs_inobt_rec_incore *);
  58
  59#if defined(DEBUG) || defined(XFS_WARN)
  60int xfs_inobt_rec_check_count(struct xfs_mount *,
  61                              struct xfs_inobt_rec_incore *);
  62#else
  63#define xfs_inobt_rec_check_count(mp, rec)      0
  64#endif  /* DEBUG */
  65
  66int xfs_finobt_calc_reserves(struct xfs_mount *mp, struct xfs_trans *tp,
  67                xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used);
  68extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp,
  69                unsigned long long len);
  70int xfs_inobt_cur(struct xfs_mount *mp, struct xfs_trans *tp,
  71                xfs_agnumber_t agno, xfs_btnum_t btnum,
  72                struct xfs_btree_cur **curpp, struct xfs_buf **agi_bpp);
  73
  74void xfs_inobt_commit_staged_btree(struct xfs_btree_cur *cur,
  75                struct xfs_trans *tp, struct xfs_buf *agbp);
  76
  77#endif  /* __XFS_IALLOC_BTREE_H__ */
  78