xfs_trans_space.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
  4 * All Rights Reserved.
  5 */
  6#include "xfs.h"
  7#include "xfs_fs.h"
  8#include "xfs_shared.h"
  9#include "xfs_format.h"
 10#include "xfs_da_format.h"
 11#include "xfs_log_format.h"
 12#include "xfs_trans_resv.h"
 13#include "xfs_mount.h"
 14#include "xfs_da_btree.h"
 15#include "xfs_bmap_btree.h"
 16#include "xfs_trans_space.h"
 17
 18/* Calculate the disk space required to add a parent pointer. */
 19unsigned int
 20xfs_parent_calc_space_res(
 21	struct xfs_mount	*mp,
 22	unsigned int		namelen)
 23{
 24	/*
 25	 * Parent pointers are always the first attr in an attr tree, and never
 26	 * larger than a block
 27	 */
 28	return XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK) +
 29	       XFS_NEXTENTADD_SPACE_RES(mp, namelen, XFS_ATTR_FORK);
 30}
 31
 32unsigned int
 33xfs_create_space_res(
 34	struct xfs_mount	*mp,
 35	unsigned int		namelen)
 36{
 37	unsigned int		ret;
 38
 39	ret = XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp, namelen);
 40	if (xfs_has_parent(mp))
 41		ret += xfs_parent_calc_space_res(mp, namelen);
 42
 43	return ret;
 44}
 45
 46unsigned int
 47xfs_mkdir_space_res(
 48	struct xfs_mount	*mp,
 49	unsigned int		namelen)
 50{
 51	return xfs_create_space_res(mp, namelen);
 52}
 53
 54unsigned int
 55xfs_link_space_res(
 56	struct xfs_mount	*mp,
 57	unsigned int		namelen)
 58{
 59	unsigned int		ret;
 60
 61	ret = XFS_DIRENTER_SPACE_RES(mp, namelen);
 62	if (xfs_has_parent(mp))
 63		ret += xfs_parent_calc_space_res(mp, namelen);
 64
 65	return ret;
 66}
 67
 68unsigned int
 69xfs_symlink_space_res(
 70	struct xfs_mount	*mp,
 71	unsigned int		namelen,
 72	unsigned int		fsblocks)
 73{
 74	unsigned int		ret;
 75
 76	ret = XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp, namelen) +
 77			fsblocks;
 78
 79	if (xfs_has_parent(mp))
 80		ret += xfs_parent_calc_space_res(mp, namelen);
 81
 82	return ret;
 83}
 84
 85unsigned int
 86xfs_remove_space_res(
 87	struct xfs_mount	*mp,
 88	unsigned int		namelen)
 89{
 90	unsigned int		ret = XFS_DIRREMOVE_SPACE_RES(mp);
 91
 92	if (xfs_has_parent(mp))
 93		ret += xfs_parent_calc_space_res(mp, namelen);
 94
 95	return ret;
 96}
 97
 98unsigned int
 99xfs_rename_space_res(
100	struct xfs_mount	*mp,
101	unsigned int		src_namelen,
102	bool			target_exists,
103	unsigned int		target_namelen,
104	bool			has_whiteout)
105{
106	unsigned int		ret;
107
108	ret = XFS_DIRREMOVE_SPACE_RES(mp) +
109			XFS_DIRENTER_SPACE_RES(mp, target_namelen);
110
111	if (xfs_has_parent(mp)) {
112		if (has_whiteout)
113			ret += xfs_parent_calc_space_res(mp, src_namelen);
114		ret += 2 * xfs_parent_calc_space_res(mp, target_namelen);
115	}
116
117	if (target_exists)
118		ret += xfs_parent_calc_space_res(mp, target_namelen);
119
120	return ret;
121}