summaryrefslogtreecommitdiffstats
path: root/fs/xfs/libxfs/xfs_trans_space.c
blob: b9dc3752f702ce9341bcd7a249c3a418140c8056 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_da_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_da_btree.h"
#include "xfs_bmap_btree.h"
#include "xfs_trans_space.h"

/* Calculate the disk space required to add a parent pointer. */
unsigned int
xfs_parent_calc_space_res(
	struct xfs_mount	*mp,
	unsigned int		namelen)
{
	/*
	 * Parent pointers are always the first attr in an attr tree, and never
	 * larger than a block
	 */
	return XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK) +
	       XFS_NEXTENTADD_SPACE_RES(mp, namelen, XFS_ATTR_FORK);
}

unsigned int
xfs_create_space_res(
	struct xfs_mount	*mp,
	unsigned int		namelen)
{
	unsigned int		ret;

	ret = XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp, namelen);
	if (xfs_has_parent(mp))
		ret += xfs_parent_calc_space_res(mp, namelen);

	return ret;
}

unsigned int
xfs_mkdir_space_res(
	struct xfs_mount	*mp,
	unsigned int		namelen)
{
	return xfs_create_space_res(mp, namelen);
}

unsigned int
xfs_link_space_res(
	struct xfs_mount	*mp,
	unsigned int		namelen)
{
	unsigned int		ret;

	ret = XFS_DIRENTER_SPACE_RES(mp, namelen);
	if (xfs_has_parent(mp))
		ret += xfs_parent_calc_space_res(mp, namelen);

	return ret;
}

unsigned int
xfs_symlink_space_res(
	struct xfs_mount	*mp,
	unsigned int		namelen,
	unsigned int		fsblocks)
{
	unsigned int		ret;

	ret = XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp, namelen) +
			fsblocks;

	if (xfs_has_parent(mp))
		ret += xfs_parent_calc_space_res(mp, namelen);

	return ret;
}

unsigned int
xfs_remove_space_res(
	struct xfs_mount	*mp,
	unsigned int		namelen)
{
	unsigned int		ret = XFS_DIRREMOVE_SPACE_RES(mp);

	if (xfs_has_parent(mp))
		ret += xfs_parent_calc_space_res(mp, namelen);

	return ret;
}

unsigned int
xfs_rename_space_res(
	struct xfs_mount	*mp,
	unsigned int		src_namelen,
	bool			target_exists,
	unsigned int		target_namelen,
	bool			has_whiteout)
{
	unsigned int		ret;

	ret = XFS_DIRREMOVE_SPACE_RES(mp) +
			XFS_DIRENTER_SPACE_RES(mp, target_namelen);

	if (xfs_has_parent(mp)) {
		if (has_whiteout)
			ret += xfs_parent_calc_space_res(mp, src_namelen);
		ret += 2 * xfs_parent_calc_space_res(mp, target_namelen);
	}

	if (target_exists)
		ret += xfs_parent_calc_space_res(mp, target_namelen);

	return ret;
}