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0ed5f7356d
Add code for all five btree types so that we can compute the absolute maximum possible btree height for each btree type. This is a setup for the next patch, which makes every btree type have its own cursor cache. The functions are exported so that we can have xfs_db report the absolute maximum btree heights for each btree type, rather than making everyone run their own ad-hoc computations. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com>
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_IALLOC_BTREE_H__
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#define __XFS_IALLOC_BTREE_H__
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/*
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* Inode map on-disk structures
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*/
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struct xfs_buf;
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struct xfs_btree_cur;
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struct xfs_mount;
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struct xfs_perag;
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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_INOBT_BLOCK_LEN(mp) \
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(xfs_has_crc(((mp))) ? \
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XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)
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/*
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* Record, key, and pointer address macros for btree blocks.
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*
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* (note that some of these may appear unused, but they are used in userspace)
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*/
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#define XFS_INOBT_REC_ADDR(mp, block, index) \
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((xfs_inobt_rec_t *) \
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((char *)(block) + \
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XFS_INOBT_BLOCK_LEN(mp) + \
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(((index) - 1) * sizeof(xfs_inobt_rec_t))))
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#define XFS_INOBT_KEY_ADDR(mp, block, index) \
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((xfs_inobt_key_t *) \
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((char *)(block) + \
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XFS_INOBT_BLOCK_LEN(mp) + \
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((index) - 1) * sizeof(xfs_inobt_key_t)))
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#define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \
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((xfs_inobt_ptr_t *) \
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((char *)(block) + \
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XFS_INOBT_BLOCK_LEN(mp) + \
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(maxrecs) * sizeof(xfs_inobt_key_t) + \
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((index) - 1) * sizeof(xfs_inobt_ptr_t)))
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extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *mp,
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struct xfs_trans *tp, struct xfs_buf *agbp,
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struct xfs_perag *pag, xfs_btnum_t btnum);
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struct xfs_btree_cur *xfs_inobt_stage_cursor(struct xfs_mount *mp,
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struct xbtree_afakeroot *afake, struct xfs_perag *pag,
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xfs_btnum_t btnum);
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extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
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/* ir_holemask to inode allocation bitmap conversion */
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uint64_t xfs_inobt_irec_to_allocmask(struct xfs_inobt_rec_incore *);
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#if defined(DEBUG) || defined(XFS_WARN)
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int xfs_inobt_rec_check_count(struct xfs_mount *,
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struct xfs_inobt_rec_incore *);
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#else
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#define xfs_inobt_rec_check_count(mp, rec) 0
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#endif /* DEBUG */
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int xfs_finobt_calc_reserves(struct xfs_mount *mp, struct xfs_trans *tp,
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struct xfs_perag *pag, xfs_extlen_t *ask, xfs_extlen_t *used);
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extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp,
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unsigned long long len);
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int xfs_inobt_cur(struct xfs_mount *mp, struct xfs_trans *tp,
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struct xfs_perag *pag, xfs_btnum_t btnum,
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struct xfs_btree_cur **curpp, struct xfs_buf **agi_bpp);
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void xfs_inobt_commit_staged_btree(struct xfs_btree_cur *cur,
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struct xfs_trans *tp, struct xfs_buf *agbp);
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unsigned int xfs_iallocbt_maxlevels_ondisk(void);
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#endif /* __XFS_IALLOC_BTREE_H__ */
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