119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2000,2002-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_BMAP_BTREE_H__
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#define __XFS_BMAP_BTREE_H__
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struct xfs_btree_cur;
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struct xfs_btree_block;
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struct xfs_mount;
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struct xfs_inode;
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struct xfs_trans;
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/*
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* Btree block header size depends on a superblock flag.
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*/
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#define XFS_BMBT_BLOCK_LEN(mp) \
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(xfs_has_crc(((mp))) ? \
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XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN)
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#define XFS_BMBT_REC_ADDR(mp, block, index) \
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((xfs_bmbt_rec_t *) \
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((char *)(block) + \
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XFS_BMBT_BLOCK_LEN(mp) + \
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((index) - 1) * sizeof(xfs_bmbt_rec_t)))
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#define XFS_BMBT_KEY_ADDR(mp, block, index) \
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((xfs_bmbt_key_t *) \
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((char *)(block) + \
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XFS_BMBT_BLOCK_LEN(mp) + \
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((index) - 1) * sizeof(xfs_bmbt_key_t)))
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#define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \
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((xfs_bmbt_ptr_t *) \
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((char *)(block) + \
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XFS_BMBT_BLOCK_LEN(mp) + \
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(maxrecs) * sizeof(xfs_bmbt_key_t) + \
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((index) - 1) * sizeof(xfs_bmbt_ptr_t)))
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#define XFS_BMDR_REC_ADDR(block, index) \
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((xfs_bmdr_rec_t *) \
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((char *)(block) + \
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sizeof(struct xfs_bmdr_block) + \
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((index) - 1) * sizeof(xfs_bmdr_rec_t)))
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#define XFS_BMDR_KEY_ADDR(block, index) \
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((xfs_bmdr_key_t *) \
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((char *)(block) + \
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sizeof(struct xfs_bmdr_block) + \
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((index) - 1) * sizeof(xfs_bmdr_key_t)))
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#define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \
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((xfs_bmdr_ptr_t *) \
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((char *)(block) + \
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sizeof(struct xfs_bmdr_block) + \
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(maxrecs) * sizeof(xfs_bmdr_key_t) + \
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((index) - 1) * sizeof(xfs_bmdr_ptr_t)))
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/*
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* These are to be used when we know the size of the block and
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* we don't have a cursor.
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*/
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#define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \
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XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0))
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#define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \
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(int)(XFS_BMBT_BLOCK_LEN(mp) + \
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((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
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#define XFS_BMAP_BROOT_SPACE(mp, bb) \
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(XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs)))
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#define XFS_BMDR_SPACE_CALC(nrecs) \
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(int)(sizeof(xfs_bmdr_block_t) + \
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((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
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#define XFS_BMAP_BMDR_SPACE(bb) \
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(XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))
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/*
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* Maximum number of bmap btree levels.
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*/
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#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)])
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/*
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* Prototypes for xfs_bmap.c to call.
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*/
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extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int,
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struct xfs_btree_block *, int);
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void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec *r, struct xfs_bmbt_irec *s);
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extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(const struct xfs_bmbt_rec *r);
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extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(const struct xfs_bmbt_rec *r);
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void xfs_bmbt_disk_get_all(const struct xfs_bmbt_rec *r,
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struct xfs_bmbt_irec *s);
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extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int,
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xfs_bmdr_block_t *, int);
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extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
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extern int xfs_bmdr_maxrecs(int blocklen, int leaf);
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extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);
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extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip,
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int whichfork, xfs_ino_t new_owner,
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struct list_head *buffer_list);
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extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
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struct xfs_trans *, struct xfs_inode *, int);
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extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp,
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unsigned long long len);
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unsigned int xfs_bmbt_maxlevels_ondisk(void);
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int __init xfs_bmbt_init_cur_cache(void);
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void xfs_bmbt_destroy_cur_cache(void);
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#endif /* __XFS_BMAP_BTREE_H__ */
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