fs/xfs/libxfs/xfs_ialloc_btree.h

   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
  13 struct xfs_buf;
  14 struct xfs_btree_cur;
  15 struct xfs_mount;
  16 struct xfs_perag;
  17
  18 /*
  19  * Btree block header size depends on a superblock flag.
  20  */
  21 #define XFS_INOBT_BLOCK_LEN(mp) \
  22         (xfs_has_crc(((mp))) ? \
  23                 XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)
  24
  25 /*
  26  * Record, key, and pointer address macros for btree blocks.
  27  *
  28  * (note that some of these may appear unused, but they are used in userspace)
  29  */
  30 #define XFS_INOBT_REC_ADDR(mp, block, index) \
  31         ((xfs_inobt_rec_t *) \
  32                 ((char *)(block) + \
  33                  XFS_INOBT_BLOCK_LEN(mp) + \
  34                  (((index) - 1) * sizeof(xfs_inobt_rec_t))))
  35
  36 #define XFS_INOBT_KEY_ADDR(mp, block, index) \
  37         ((xfs_inobt_key_t *) \
  38                 ((char *)(block) + \
  39                  XFS_INOBT_BLOCK_LEN(mp) + \
  40                  ((index) - 1) * sizeof(xfs_inobt_key_t)))
  41
  42 #define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \
  43         ((xfs_inobt_ptr_t *) \
  44                 ((char *)(block) + \
  45                  XFS_INOBT_BLOCK_LEN(mp) + \
  46                  (maxrecs) * sizeof(xfs_inobt_key_t) + \
  47                  ((index) - 1) * sizeof(xfs_inobt_ptr_t)))
  48
  49 struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_perag *pag,
  50                 struct xfs_trans *tp, struct xfs_buf *agbp);
  51 struct xfs_btree_cur *xfs_finobt_init_cursor(struct xfs_perag *pag,
  52                 struct xfs_trans *tp, struct xfs_buf *agbp);
  53 unsigned int xfs_inobt_maxrecs(struct xfs_mount *mp, unsigned int blocklen,
  54                 bool leaf);
  55
  56 /* ir_holemask to inode allocation bitmap conversion */
  57 uint64_t xfs_inobt_irec_to_allocmask(const struct xfs_inobt_rec_incore *irec);
  58
  59 #if defined(DEBUG) || defined(XFS_WARN)
  60 int 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
  66 int xfs_finobt_calc_reserves(struct xfs_perag *perag, struct xfs_trans *tp,
  67                 xfs_extlen_t *ask, xfs_extlen_t *used);
  68 extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp,
  69                 unsigned long long len);
  70
  71 void xfs_inobt_commit_staged_btree(struct xfs_btree_cur *cur,
  72                 struct xfs_trans *tp, struct xfs_buf *agbp);
  73
  74 unsigned int xfs_iallocbt_maxlevels_ondisk(void);
  75
  76 int __init xfs_inobt_init_cur_cache(void);
  77 void xfs_inobt_destroy_cur_cache(void);
  78
  79 #endif  /* __XFS_IALLOC_BTREE_H__ */