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
|
#include "c.h"
#include "strutils.h"
#ifdef HAVE_LIBBLKID
# include <blkid.h>
#endif
#include "fdiskP.h"
struct fdisk_wipe {
struct list_head wipes;
uint64_t start; /* sectors */
uint64_t size; /* sectors */
};
static struct fdisk_wipe *fdisk_get_wipe_area(
struct fdisk_context *cxt,
uint64_t start,
uint64_t size)
{
struct list_head *p;
if (cxt == NULL || list_empty(&cxt->wipes))
return NULL;
list_for_each(p, &cxt->wipes) {
struct fdisk_wipe *wp = list_entry(p, struct fdisk_wipe, wipes);
if (wp->start == start && wp->size == size)
return wp;
}
return NULL;
}
void fdisk_free_wipe_areas(struct fdisk_context *cxt)
{
while (!list_empty(&cxt->wipes)) {
struct fdisk_wipe *wp = list_entry(cxt->wipes.next,
struct fdisk_wipe, wipes);
DBG(WIPE, ul_debugobj(wp, "free [start=%ju, size=%ju]",
(uintmax_t) wp->start, (uintmax_t) wp->size));
list_del(&wp->wipes);
free(wp);
}
}
int fdisk_has_wipe_area(struct fdisk_context *cxt,
uint64_t start,
uint64_t size)
{
return fdisk_get_wipe_area(cxt, start, size) != NULL;
}
/* Add/remove new wiping area
*
* Returns: <0 on error, or old area setting (1: enabled, 0: disabled)
*/
int fdisk_set_wipe_area(struct fdisk_context *cxt,
uint64_t start,
uint64_t size,
int enable)
{
struct fdisk_wipe *wp;
if (FDISK_IS_UNDEF(start) || FDISK_IS_UNDEF(size))
return -EINVAL;
wp = fdisk_get_wipe_area(cxt, start, size);
/* disable */
if (!enable) {
if (wp) {
DBG(WIPE, ul_debugobj(wp, "disable [start=%ju, size=%ju]",
(uintmax_t) start, (uintmax_t) size));
list_del(&wp->wipes);
free(wp);
return 1;
}
DBG(WIPE, ul_debug("not requested"));
return 0;
}
/* enable */
if (wp)
return 1; /* already enabled */
wp = calloc(1, sizeof(*wp));
if (!wp)
return -ENOMEM;
DBG(WIPE, ul_debugobj(wp, "enable [start=%ju, size=%ju]",
(uintmax_t) start, (uintmax_t) size));
INIT_LIST_HEAD(&wp->wipes);
wp->start = start;
wp->size = size;
list_add_tail(&wp->wipes, &cxt->wipes);
return 0;
}
#ifndef HAVE_LIBBLKID
int fdisk_do_wipe(struct fdisk_context *cxt __attribute__((__unused__)))
{
return 0;
}
#else
int fdisk_do_wipe(struct fdisk_context *cxt)
{
struct list_head *p;
blkid_probe pr;
int rc;
assert(cxt);
assert(cxt->dev_fd >= 0);
if (list_empty(&cxt->wipes))
return 0;
pr = blkid_new_probe();
if (!pr)
return -ENOMEM;
list_for_each(p, &cxt->wipes) {
struct fdisk_wipe *wp = list_entry(p, struct fdisk_wipe, wipes);
blkid_loff_t start = (blkid_loff_t) wp->start * cxt->sector_size,
size = (blkid_loff_t) wp->size * cxt->sector_size;
DBG(WIPE, ul_debugobj(wp, "initialize libblkid prober [start=%ju, size=%ju]",
(uintmax_t) start, (uintmax_t) size));
rc = blkid_probe_set_device(pr, cxt->dev_fd, start, size);
if (rc) {
DBG(WIPE, ul_debugobj(wp, "blkid_probe_set_device() failed [rc=%d]", rc));
return rc;
}
DBG(WIPE, ul_debugobj(wp, " wiping..."));
blkid_wipe_all(pr);
}
blkid_free_probe(pr);
return 0;
}
#endif
/*
* Please don't call this function if there is already a PT.
*
* Returns: 0 if nothing found, < 0 on error, 1 if found a signature
*/
#ifndef HAVE_LIBBLKID
int fdisk_check_collisions(struct fdisk_context *cxt __attribute__((__unused__)))
{
return 0;
}
#else
int fdisk_check_collisions(struct fdisk_context *cxt)
{
int rc = 0;
blkid_probe pr;
assert(cxt);
assert(cxt->dev_fd >= 0);
DBG(WIPE, ul_debugobj(cxt, "wipe check: initialize libblkid prober"));
pr = blkid_new_probe();
if (!pr)
return -ENOMEM;
rc = blkid_probe_set_device(pr, cxt->dev_fd, 0, 0);
if (rc)
return rc;
cxt->pt_collision = 0;
free(cxt->collision);
cxt->collision = NULL;
blkid_probe_enable_superblocks(pr, 1);
blkid_probe_set_superblocks_flags(pr, BLKID_SUBLKS_TYPE |
BLKID_SUBLKS_BADCSUM);
blkid_probe_enable_partitions(pr, 1);
blkid_probe_set_partitions_flags(pr, BLKID_PARTS_FORCE_GPT);
/* we care about the first found FS/raid, so don't call blkid_do_probe()
* in loop or don't use blkid_do_fullprobe() ... */
rc = blkid_do_probe(pr);
if (rc == 0) {
const char *name = NULL;
if (blkid_probe_lookup_value(pr, "TYPE", &name, 0) == 0)
cxt->collision = strdup(name);
else if (blkid_probe_lookup_value(pr, "PTTYPE", &name, 0) == 0) {
cxt->collision = strdup(name);
cxt->pt_collision = 1;
}
if (name && !cxt->collision)
rc = -ENOMEM;
}
blkid_free_probe(pr);
return rc < 0 ? rc : cxt->collision ? 1 : 0;
}
#endif
|
