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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
#include <stdlib.h>
#include <assert.h>
#include <stdio.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/bitops.h>
#include "test.h"
struct item *
item_tag_set(struct radix_tree_root *root, unsigned long index, int tag)
{
return radix_tree_tag_set(root, index, tag);
}
struct item *
item_tag_clear(struct radix_tree_root *root, unsigned long index, int tag)
{
return radix_tree_tag_clear(root, index, tag);
}
int item_tag_get(struct radix_tree_root *root, unsigned long index, int tag)
{
return radix_tree_tag_get(root, index, tag);
}
int __item_insert(struct radix_tree_root *root, struct item *item,
unsigned order)
{
return __radix_tree_insert(root, item->index, order, item);
}
int item_insert(struct radix_tree_root *root, unsigned long index)
{
return __item_insert(root, item_create(index), 0);
}
int item_insert_order(struct radix_tree_root *root, unsigned long index,
unsigned order)
{
return __item_insert(root, item_create(index), order);
}
int item_delete(struct radix_tree_root *root, unsigned long index)
{
struct item *item = radix_tree_delete(root, index);
if (item) {
assert(item->index == index);
free(item);
return 1;
}
return 0;
}
struct item *item_create(unsigned long index)
{
struct item *ret = malloc(sizeof(*ret));
ret->index = index;
return ret;
}
void item_check_present(struct radix_tree_root *root, unsigned long index)
{
struct item *item;
item = radix_tree_lookup(root, index);
assert(item != 0);
assert(item->index == index);
}
struct item *item_lookup(struct radix_tree_root *root, unsigned long index)
{
return radix_tree_lookup(root, index);
}
void item_check_absent(struct radix_tree_root *root, unsigned long index)
{
struct item *item;
item = radix_tree_lookup(root, index);
assert(item == 0);
}
/*
* Scan only the passed (start, start+nr] for present items
*/
void item_gang_check_present(struct radix_tree_root *root,
unsigned long start, unsigned long nr,
int chunk, int hop)
{
struct item *items[chunk];
unsigned long into;
for (into = 0; into < nr; ) {
int nfound;
int nr_to_find = chunk;
int i;
if (nr_to_find > (nr - into))
nr_to_find = nr - into;
nfound = radix_tree_gang_lookup(root, (void **)items,
start + into, nr_to_find);
assert(nfound == nr_to_find);
for (i = 0; i < nfound; i++)
assert(items[i]->index == start + into + i);
into += hop;
}
}
/*
* Scan the entire tree, only expecting present items (start, start+nr]
*/
void item_full_scan(struct radix_tree_root *root, unsigned long start,
unsigned long nr, int chunk)
{
struct item *items[chunk];
unsigned long into = 0;
unsigned long this_index = start;
int nfound;
int i;
// printf("%s(0x%08lx, 0x%08lx, %d)\n", __FUNCTION__, start, nr, chunk);
while ((nfound = radix_tree_gang_lookup(root, (void **)items, into,
chunk))) {
// printf("At 0x%08lx, nfound=%d\n", into, nfound);
for (i = 0; i < nfound; i++) {
assert(items[i]->index == this_index);
this_index++;
}
// printf("Found 0x%08lx->0x%08lx\n",
// items[0]->index, items[nfound-1]->index);
into = this_index;
}
if (chunk)
assert(this_index == start + nr);
nfound = radix_tree_gang_lookup(root, (void **)items,
this_index, chunk);
assert(nfound == 0);
}
static int verify_node(struct radix_tree_node *slot, unsigned int tag,
int tagged)
{
int anyset = 0;
int i;
int j;
slot = indirect_to_ptr(slot);
/* Verify consistency at this level */
for (i = 0; i < RADIX_TREE_TAG_LONGS; i++) {
if (slot->tags[tag][i]) {
anyset = 1;
break;
}
}
if (tagged != anyset) {
printf("tag: %u, shift %u, tagged: %d, anyset: %d\n",
tag, slot->shift, tagged, anyset);
for (j = 0; j < RADIX_TREE_MAX_TAGS; j++) {
printf("tag %d: ", j);
for (i = 0; i < RADIX_TREE_TAG_LONGS; i++)
printf("%016lx ", slot->tags[j][i]);
printf("\n");
}
return 1;
}
assert(tagged == anyset);
/* Go for next level */
if (slot->shift > 0) {
for (i = 0; i < RADIX_TREE_MAP_SIZE; i++)
if (slot->slots[i])
if (verify_node(slot->slots[i], tag,
!!test_bit(i, slot->tags[tag]))) {
printf("Failure at off %d\n", i);
for (j = 0; j < RADIX_TREE_MAX_TAGS; j++) {
printf("tag %d: ", j);
for (i = 0; i < RADIX_TREE_TAG_LONGS; i++)
printf("%016lx ", slot->tags[j][i]);
printf("\n");
}
return 1;
}
}
return 0;
}
void verify_tag_consistency(struct radix_tree_root *root, unsigned int tag)
{
struct radix_tree_node *node = root->rnode;
if (!radix_tree_is_indirect_ptr(node))
return;
verify_node(node, tag, !!root_tag_get(root, tag));
}
void item_kill_tree(struct radix_tree_root *root)
{
struct item *items[32];
int nfound;
while ((nfound = radix_tree_gang_lookup(root, (void **)items, 0, 32))) {
int i;
for (i = 0; i < nfound; i++) {
void *ret;
ret = radix_tree_delete(root, items[i]->index);
assert(ret == items[i]);
free(items[i]);
}
}
assert(radix_tree_gang_lookup(root, (void **)items, 0, 32) == 0);
assert(root->rnode == NULL);
}
void tree_verify_min_height(struct radix_tree_root *root, int maxindex)
{
unsigned shift;
struct radix_tree_node *node = root->rnode;
if (!radix_tree_is_indirect_ptr(node)) {
assert(maxindex == 0);
return;
}
node = indirect_to_ptr(node);
assert(maxindex <= node_maxindex(node));
shift = node->shift;
if (shift > 0)
assert(maxindex > shift_maxindex(shift - RADIX_TREE_MAP_SHIFT));
else
assert(maxindex > 0);
}
|
