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
|
/* Copyright 2001-2005 by Hans Reiser, licensing governed by
reiser4progs/COPYING.
librepair/twig_scan.c - methods are needed for the second fsck pass.
Description: fsck on this pass zeroes extent pointers which point to
an already used block. Builds a map of used blocks. */
#include <repair/twig_scan.h>
/* Check unfm block pointer if it points to an already used block (leaf,
format area) or out of format area. Return 1 if it does, 0 - does not,
-1 error. */
static errno_t cb_item_region_check(blk_t start, uint64_t count, void *data) {
repair_ts_t *ts = (repair_ts_t *)data;
aal_assert("vpf-385", ts != NULL);
aal_assert("vpf-567", ts->bm_met != NULL);
/* This must be fixed at the first pass. */
if (start >= ts->bm_met->total ||
count > ts->bm_met->total ||
start > ts->bm_met->total - count)
{
ts->stat.bad_unfm_ptrs++;
return RE_FATAL;
}
/* Check that the pointed region is free. */
if (reiser4_bitmap_test_region(ts->bm_met, start, count, 0) == 0) {
ts->stat.bad_unfm_ptrs++;
return RE_FIXABLE;
}
if (ts->bm_used)
reiser4_bitmap_mark_region(ts->bm_used, start, count);
reiser4_bitmap_mark_region(ts->bm_met, start, count);
return 0;
}
/* Callback for the traverse which calls item_ops.check_layout method if
layout exists for all items which can contain data, not tree index data
only. Shrink the node if item lenght is changed. */
static errno_t cb_check_layout(reiser4_place_t *place, void *data) {
repair_ts_t *ts = (repair_ts_t *)data;
reiser4_node_t *node;
errno_t res;
aal_assert("vpf-384", place != NULL);
aal_assert("vpf-727", place->node != NULL);
aal_assert("vpf-797", data != NULL);
node = place->node;
if (reiser4_item_branch(place->plug))
return 0;
if ((res = repair_item_check_layout(place, cb_item_region_check,
ts, ts->repair->mode)) < 0)
return res;
if (res & RE_FATAL) {
if (ts->repair->mode == RM_BUILD) {
trans_hint_t hint;
fsck_mess("Node (%llu), item (%u), [%s]: broken "
"item layout. Remove the item.",
node->block->nr, place->pos.item,
reiser4_print_key(&place->key));
hint.count = 1;
hint.place_func = NULL;
hint.region_func = NULL;
hint.shift_flags = SF_DEFAULT;
res = reiser4_node_remove(node, &place->pos, &hint);
if (res < 0) return res;
place->pos.item--;
} else {
ts->repair->fatal++;
}
} else if (res & RE_FIXABLE) {
ts->repair->fixable++;
}
return 0;
}
static void repair_twig_scan_update(repair_ts_t *ts) {
aal_stream_t stream;
char *time_str;
aal_assert("vpf-885", ts != NULL);
aal_stream_init(&stream, NULL, &memory_stream);
aal_stream_format(&stream, "\tRead twigs %llu\n", ts->stat.read_twigs);
if (ts->stat.fixed_twigs) {
aal_stream_format(&stream, "\tCorrected nodes %llu\n",
ts->stat.fixed_twigs);
}
if (ts->stat.bad_unfm_ptrs) {
aal_stream_format(&stream, "\t%s extent pointers %llu\n",
ts->repair->mode != RM_CHECK ? "Fixed invalid"
: "Invaid", ts->stat.bad_unfm_ptrs);
}
time_str = ctime(&ts->stat.time);
time_str[aal_strlen(time_str) - 1] = '\0';
aal_stream_format(&stream, "\tTime interval: %s - ", time_str);
time(&ts->stat.time);
time_str = ctime(&ts->stat.time);
time_str[aal_strlen(time_str) - 1] = '\0';
aal_stream_format(&stream, time_str);
aal_mess(stream.entity);
aal_stream_fini(&stream);
}
/* The pass itself, goes through all twigs, check block pointers which items
may have and account them in proper bitmaps. */
errno_t repair_twig_scan(repair_ts_t *ts) {
reiser4_node_t *node;
aal_gauge_t *gauge;
uint64_t total;
blk_t blk = 0;
errno_t res;
aal_assert("vpf-533", ts != NULL);
aal_assert("vpf-534", ts->repair != NULL);
aal_assert("vpf-845", ts->repair->fs != NULL);
aal_mess("CHECKING EXTENT REGIONS.");
gauge = aal_gauge_create(aux_gauge_handlers[GT_PROGRESS],
NULL, NULL, 500, NULL);
aal_gauge_touch(gauge);
time(&ts->stat.time);
total = reiser4_bitmap_marked(ts->bm_twig);
while ((blk = reiser4_bitmap_find_marked(ts->bm_twig, blk))
!= INVAL_BLK)
{
ts->stat.read_twigs++;
aal_gauge_set_value(gauge, ts->stat.read_twigs * 100 / total);
aal_gauge_touch(gauge);
if (!(node = reiser4_node_open(ts->repair->fs->tree, blk))) {
aal_error("Twig scan pass failed to open "
"the twig (%llu)", blk);
res = -EINVAL;
goto error;
}
/* Lookup the node. */
if ((res = reiser4_node_trav(node, cb_check_layout, ts)))
goto error_node_free;
if (reiser4_node_isdirty(node))
ts->stat.fixed_twigs++;
if (!reiser4_node_locked(node))
reiser4_node_fini(node);
blk++;
}
aal_gauge_done(gauge);
aal_gauge_free(gauge);
repair_twig_scan_update(ts);
if (ts->repair->mode != RM_CHECK)
reiser4_fs_sync(ts->repair->fs);
return 0;
error_node_free:
reiser4_node_close(node);
error:
aal_gauge_done(gauge);
aal_gauge_free(gauge);
repair_twig_scan_update(ts);
return res;
}
|
