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
239
240
241
242
243
244
245
246
247
248
249
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2024, Huawei Technologies Co, Ltd.
*
* Authors: Zhihao Cheng <chengzhihao1@huawei.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include "bitops.h"
#include "kmem.h"
#include "ubifs.h"
#include "defs.h"
#include "debug.h"
#include "key.h"
#include "misc.h"
#include "fsck.ubifs.h"
int ubifs_load_filesystem(struct ubifs_info *c)
{
int err;
size_t sz;
err = init_constants_early(c);
if (err) {
exit_code |= FSCK_ERROR;
return err;
}
err = check_volume_empty(c);
if (err <= 0) {
exit_code |= FSCK_ERROR;
log_err(c, 0, "%s UBI volume!", err < 0 ? "bad" : "empty");
return -EINVAL;
}
if (c->ro_media && !c->ro_mount) {
exit_code |= FSCK_ERROR;
log_err(c, 0, "cannot read-write on read-only media");
return -EROFS;
}
err = -ENOMEM;
c->bottom_up_buf = kmalloc_array(BOTTOM_UP_HEIGHT, sizeof(int),
GFP_KERNEL);
if (!c->bottom_up_buf) {
exit_code |= FSCK_ERROR;
log_err(c, errno, "cannot allocate bottom_up_buf");
goto out_free;
}
c->sbuf = vmalloc(c->leb_size);
if (!c->sbuf) {
exit_code |= FSCK_ERROR;
log_err(c, errno, "cannot allocate sbuf");
goto out_free;
}
if (!c->ro_mount) {
c->ileb_buf = vmalloc(c->leb_size);
if (!c->ileb_buf) {
exit_code |= FSCK_ERROR;
log_err(c, errno, "cannot allocate ileb_buf");
goto out_free;
}
}
c->mounting = 1;
log_out(c, "Read superblock");
err = ubifs_read_superblock(c);
if (err) {
if (test_and_clear_failure_reason_callback(c, FR_DATA_CORRUPTED))
fix_problem(c, SB_CORRUPTED, NULL);
exit_code |= FSCK_ERROR;
goto out_mounting;
}
err = init_constants_sb(c);
if (err) {
exit_code |= FSCK_ERROR;
goto out_mounting;
}
sz = ALIGN(c->max_idx_node_sz, c->min_io_size) * 2;
c->cbuf = kmalloc(sz, GFP_NOFS);
if (!c->cbuf) {
err = -ENOMEM;
exit_code |= FSCK_ERROR;
log_err(c, errno, "cannot allocate cbuf");
goto out_mounting;
}
err = alloc_wbufs(c);
if (err) {
exit_code |= FSCK_ERROR;
log_err(c, 0, "cannot allocate wbuf");
goto out_mounting;
}
log_out(c, "Read master & init lpt");
err = ubifs_read_master(c);
if (err) {
if (test_and_clear_failure_reason_callback(c, FR_DATA_CORRUPTED)) {
if (fix_problem(c, MST_CORRUPTED, NULL))
FSCK(c)->try_rebuild = true;
} else
exit_code |= FSCK_ERROR;
goto out_master;
}
init_constants_master(c);
if ((c->mst_node->flags & cpu_to_le32(UBIFS_MST_DIRTY)) != 0) {
ubifs_msg(c, "recovery needed");
c->need_recovery = 1;
}
if (c->need_recovery && !c->ro_mount) {
err = ubifs_recover_inl_heads(c, c->sbuf);
if (err) {
exit_code |= FSCK_ERROR;
goto out_master;
}
}
err = ubifs_lpt_init(c, 1, !c->ro_mount);
if (err) {
exit_code |= FSCK_ERROR;
goto out_master;
}
if (!c->ro_mount && c->space_fixup) {
err = ubifs_fixup_free_space(c);
if (err) {
exit_code |= FSCK_ERROR;
goto out_lpt;
}
}
if (!c->ro_mount && !c->need_recovery) {
/*
* Set the "dirty" flag so that if we reboot uncleanly we
* will notice this immediately on the next mount.
*/
c->mst_node->flags |= cpu_to_le32(UBIFS_MST_DIRTY);
err = ubifs_write_master(c);
if (err) {
exit_code |= FSCK_ERROR;
goto out_lpt;
}
}
if (!c->ro_mount && c->superblock_need_write) {
err = ubifs_write_sb_node(c, c->sup_node);
if (err) {
exit_code |= FSCK_ERROR;
goto out_lpt;
}
c->superblock_need_write = 0;
}
log_out(c, "Replay journal");
err = ubifs_replay_journal(c);
if (err) {
unsigned int reason = get_failure_reason_callback(c);
clear_failure_reason_callback(c);
if (reason & FR_DATA_CORRUPTED) {
if (fix_problem(c, LOG_CORRUPTED, NULL))
FSCK(c)->try_rebuild = true;
} else if (reason & FR_TNC_CORRUPTED) {
if (fix_problem(c, TNC_CORRUPTED, NULL))
FSCK(c)->try_rebuild = true;
} else {
ubifs_assert(c, reason == 0);
exit_code |= FSCK_ERROR;
}
goto out_journal;
}
/* Calculate 'min_idx_lebs' after journal replay */
c->bi.min_idx_lebs = ubifs_calc_min_idx_lebs(c);
log_out(c, "Handle orphan nodes");
err = ubifs_mount_orphans(c, c->need_recovery, c->ro_mount);
if (err) {
unsigned int reason = get_failure_reason_callback(c);
clear_failure_reason_callback(c);
if (reason & FR_TNC_CORRUPTED) {
if (fix_problem(c, TNC_CORRUPTED, NULL))
FSCK(c)->try_rebuild = true;
} else {
ubifs_assert(c, reason == 0);
exit_code |= FSCK_ERROR;
}
goto out_orphans;
}
c->mounting = 0;
return 0;
out_orphans:
free_orphans(c);
out_journal:
destroy_journal(c);
out_lpt:
ubifs_lpt_free(c, 0);
out_master:
c->max_sqnum = 0;
c->highest_inum = 0;
c->calc_idx_sz = 0;
kfree(c->mst_node);
kfree(c->rcvrd_mst_node);
free_wbufs(c);
out_mounting:
c->mounting = 0;
out_free:
kfree(c->cbuf);
kfree(c->ileb_buf);
kfree(c->sbuf);
kfree(c->bottom_up_buf);
kfree(c->sup_node);
return err;
}
void ubifs_destroy_filesystem(struct ubifs_info *c)
{
destroy_journal(c);
free_wbufs(c);
free_orphans(c);
ubifs_lpt_free(c, 0);
c->max_sqnum = 0;
c->highest_inum = 0;
c->calc_idx_sz = 0;
kfree(c->cbuf);
kfree(c->rcvrd_mst_node);
kfree(c->mst_node);
kfree(c->ileb_buf);
kfree(c->sbuf);
kfree(c->bottom_up_buf);
kfree(c->sup_node);
}
|
