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
122
123
124
125
126
127
128
129
130
131
132
133
134
|
// Copyright (C) 2022-2023 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package btrfsutil
import (
"fmt"
"strings"
"github.com/datawire/dlib/derror"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsprim"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsvol"
)
func (g Graph) renderNode(node btrfsvol.LogicalAddr) []string {
if node == 0 {
return []string{"root"}
} else if nodeData, ok := g.Nodes[node]; ok {
return []string{
fmt.Sprintf("{addr: %v,", node),
fmt.Sprintf(" level: %v,", nodeData.Level),
fmt.Sprintf(" gen: %v,", nodeData.Generation),
fmt.Sprintf(" num_items: %v,", len(nodeData.Items)),
fmt.Sprintf(" min_item: {%d,%v,%d},",
nodeData.MinItem(g).ObjectID,
nodeData.MinItem(g).ItemType,
nodeData.MinItem(g).Offset),
fmt.Sprintf(" max_item: {%d,%v,%d}}",
nodeData.MaxItem(g).ObjectID,
nodeData.MaxItem(g).ItemType,
nodeData.MaxItem(g).Offset),
}
} else if nodeErr, ok := g.BadNodes[node]; ok {
return []string{
fmt.Sprintf("{addr:%v,", node),
fmt.Sprintf(" err:%q}", nodeErr.Error()),
}
} else {
panic("should not happen")
}
}
func (g Graph) renderEdge(kp GraphEdge) []string {
a := fmt.Sprintf("[%d]={", kp.FromSlot)
b := strings.Repeat(" ", len(a))
ret := []string{
a + fmt.Sprintf("ToNode: %v,", kp.ToNode),
b + fmt.Sprintf("ToLevel: %v,", kp.ToLevel),
b + fmt.Sprintf("ToGen: %v,", kp.ToGeneration),
b + fmt.Sprintf("ToKey: {%d,%v,%d}}",
kp.ToKey.ObjectID,
kp.ToKey.ItemType,
kp.ToKey.Offset),
}
var err error
if toNode, ok := g.Nodes[kp.ToNode]; !ok {
err = g.BadNodes[kp.ToNode]
} else {
err = g.loopCheckNodeExpectations(kp, toNode)
}
if err != nil {
c := strings.Repeat(" ", len(a)-1)
ret = append(ret,
c+"^",
c+"`-err="+strings.ReplaceAll(err.Error(), "\n", "\n"+c+" "),
)
}
return ret
}
func (g Graph) renderLoop(stack []btrfsvol.LogicalAddr) []string {
var lines []string
add := func(suffixes []string) {
curLen := 0
for _, line := range lines {
if len(line) > curLen {
curLen = len(line)
}
}
for i, suffix := range suffixes {
if len(lines) <= i {
lines = append(lines, "")
}
if len(lines[i]) < curLen {
if i == 0 {
lines[i] += strings.Repeat("-", curLen-len(lines[i])-1) + ">"
} else {
lines[i] += strings.Repeat(" ", curLen-len(lines[i]))
}
}
lines[i] += suffix
}
}
for i, node := range stack {
if i > 0 {
for _, kp := range g.EdgesTo[node] {
if kp.FromNode == stack[i-1] {
add(g.renderEdge(*kp))
break
}
}
}
add(g.renderNode(node))
}
return lines
}
func (g Graph) loopCheckNodeExpectations(kp GraphEdge, toNode GraphNode) error {
var errs derror.MultiError
if toNode.Level != kp.ToLevel {
errs = append(errs, fmt.Errorf("kp.level=%v != node.level=%v",
kp.ToLevel, toNode.Level))
}
if toNode.Generation != kp.ToGeneration {
errs = append(errs, fmt.Errorf("kp.generation=%v != node.generation=%v",
kp.ToGeneration, toNode.Generation))
}
switch {
case len(toNode.Items) == 0:
errs = append(errs, fmt.Errorf("node.num_items=0"))
case kp.ToKey != (btrfsprim.Key{}) && toNode.MinItem(g) != kp.ToKey:
errs = append(errs, fmt.Errorf("kp.key=%v != node.items[0].key=%v",
kp.ToKey, toNode.MinItem(g)))
}
if len(errs) > 0 {
return errs
}
return nil
}
|
