1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
  4 * All Rights Reserved.
  5 */
  6#ifndef __XFS_TRANS_SPACE_H__
  7#define __XFS_TRANS_SPACE_H__
  8
  9/*
 10 * Components of space reservations.
 11 */
 12
 13/* Worst case number of bmaps that can be held in a block. */
 14#define XFS_MAX_CONTIG_BMAPS_PER_BLOCK(mp)    \
 15		(((mp)->m_bmap_dmxr[0]) - ((mp)->m_bmap_dmnr[0]))
 16
 17/* Worst case number of rmaps that can be held in a block. */
 18#define XFS_MAX_CONTIG_RMAPS_PER_BLOCK(mp)    \
 19		(((mp)->m_rmap_mxr[0]) - ((mp)->m_rmap_mnr[0]))
 20
 21/* Adding one rmap could split every level up to the top of the tree. */
 22#define XFS_RMAPADD_SPACE_RES(mp) ((mp)->m_rmap_maxlevels)
 23
 24/*
 25 * Note that we historically set m_rmap_maxlevels to 9 when reflink is enabled,
 26 * so we must preserve this behavior to avoid changing the transaction space
 27 * reservations and minimum log size calculations for existing filesystems.
 28 */
 29#define XFS_OLD_REFLINK_RMAP_MAXLEVELS		9
 30
 31/* Blocks we might need to add "b" rmaps to a tree. */
 32#define XFS_NRMAPADD_SPACE_RES(mp, b)\
 33	(((b + XFS_MAX_CONTIG_RMAPS_PER_BLOCK(mp) - 1) / \
 34	  XFS_MAX_CONTIG_RMAPS_PER_BLOCK(mp)) * \
 35	  XFS_RMAPADD_SPACE_RES(mp))
 36
 37#define XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp)    \
 38		(((mp)->m_alloc_mxr[0]) - ((mp)->m_alloc_mnr[0]))
 39#define	XFS_EXTENTADD_SPACE_RES(mp,w)	(XFS_BM_MAXLEVELS(mp,w) - 1)
 40#define XFS_NEXTENTADD_SPACE_RES(mp,b,w)\
 41	(((b + XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp) - 1) / \
 42	  XFS_MAX_CONTIG_EXTENTS_PER_BLOCK(mp)) * \
 43	  XFS_EXTENTADD_SPACE_RES(mp,w))
 44
 45/* Blocks we might need to add "b" mappings & rmappings to a file. */
 46#define XFS_SWAP_RMAP_SPACE_RES(mp,b,w)\
 47	(XFS_NEXTENTADD_SPACE_RES((mp), (b), (w)) + \
 48	 XFS_NRMAPADD_SPACE_RES((mp), (b)))
 49
 50#define	XFS_DAENTER_1B(mp,w)	\
 51	((w) == XFS_DATA_FORK ? (mp)->m_dir_geo->fsbcount : 1)
 52#define	XFS_DAENTER_DBS(mp,w)	\
 53	(XFS_DA_NODE_MAXDEPTH + (((w) == XFS_DATA_FORK) ? 2 : 0))
 54#define	XFS_DAENTER_BLOCKS(mp,w)	\
 55	(XFS_DAENTER_1B(mp,w) * XFS_DAENTER_DBS(mp,w))
 56#define	XFS_DAENTER_BMAP1B(mp,w)	\
 57	XFS_NEXTENTADD_SPACE_RES(mp, XFS_DAENTER_1B(mp, w), w)
 58#define	XFS_DAENTER_BMAPS(mp,w)		\
 59	(XFS_DAENTER_DBS(mp,w) * XFS_DAENTER_BMAP1B(mp,w))
 60#define	XFS_DAENTER_SPACE_RES(mp,w)	\
 61	(XFS_DAENTER_BLOCKS(mp,w) + XFS_DAENTER_BMAPS(mp,w))
 62#define	XFS_DAREMOVE_SPACE_RES(mp,w)	XFS_DAENTER_BMAPS(mp,w)
 63#define	XFS_DIRENTER_MAX_SPLIT(mp,nl)	1
 64#define	XFS_DIRENTER_SPACE_RES(mp,nl)	\
 65	(XFS_DAENTER_SPACE_RES(mp, XFS_DATA_FORK) * \
 66	 XFS_DIRENTER_MAX_SPLIT(mp,nl))
 67#define	XFS_DIRREMOVE_SPACE_RES(mp)	\
 68	XFS_DAREMOVE_SPACE_RES(mp, XFS_DATA_FORK)
 69#define	XFS_IALLOC_SPACE_RES(mp)	\
 70	(M_IGEO(mp)->ialloc_blks + \
 71	 ((xfs_has_finobt(mp) ? 2 : 1) * M_IGEO(mp)->inobt_maxlevels))
 72
 73/*
 74 * Space reservation values for various transactions.
 75 */
 76#define	XFS_ADDAFORK_SPACE_RES(mp)	\
 77	((mp)->m_dir_geo->fsbcount + XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK))
 78#define	XFS_ATTRRM_SPACE_RES(mp)	\
 79	XFS_DAREMOVE_SPACE_RES(mp, XFS_ATTR_FORK)
 80/* This macro is not used - see inline code in xfs_attr_set */
 81#define	XFS_ATTRSET_SPACE_RES(mp, v)	\
 82	(XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK) + XFS_B_TO_FSB(mp, v))
 83#define	XFS_DIOSTRAT_SPACE_RES(mp, v)	\
 84	(XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + (v))
 85#define	XFS_GROWFS_SPACE_RES(mp)	\
 86	(2 * (mp)->m_alloc_maxlevels)
 87#define	XFS_GROWFSRT_SPACE_RES(mp,b)	\
 88	((b) + XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK))
 89#define	XFS_QM_DQALLOC_SPACE_RES(mp)	\
 90	(XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + \
 91	 XFS_DQUOT_CLUSTER_SIZE_FSB)
 92#define	XFS_QM_QINOCREATE_SPACE_RES(mp)	\
 93	XFS_IALLOC_SPACE_RES(mp)
 94#define XFS_IFREE_SPACE_RES(mp)		\
 95	(xfs_has_finobt(mp) ? M_IGEO(mp)->inobt_maxlevels : 0)
 96
 97unsigned int xfs_parent_calc_space_res(struct xfs_mount *mp,
 98		unsigned int namelen);
 99
100unsigned int xfs_create_space_res(struct xfs_mount *mp, unsigned int namelen);
101unsigned int xfs_mkdir_space_res(struct xfs_mount *mp, unsigned int namelen);
102unsigned int xfs_link_space_res(struct xfs_mount *mp, unsigned int namelen);
103unsigned int xfs_symlink_space_res(struct xfs_mount *mp, unsigned int namelen,
104		unsigned int fsblocks);
105unsigned int xfs_remove_space_res(struct xfs_mount *mp, unsigned int namelen);
106
107unsigned int xfs_rename_space_res(struct xfs_mount *mp,
108		unsigned int src_namelen, bool target_exists,
109		unsigned int target_namelen, bool has_whiteout);
110
111#endif	/* __XFS_TRANS_SPACE_H__ */