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
|
/*
*
* (C) Copyright IBM Corp. 2003
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Module: libmac.so
*
* File: commit.c
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <plugin.h>
#include "mac_plugin.h"
int do_mac_commit( LOGICALDISK *ld, DISKSEG *md,
DISKSEG *parent, boolean backup )
{
mac_partition_t *p = NULL;
char *pmap=NULL;
mac_disklabel_t *disklabel=NULL;
DISKSEG *seg;
char *buffer;
disk_private_data_t *disk_pdata;
int rc = 0, i;
seg_private_data_t *pdata;
int map_count=0;
int count=0;
int vsectors_per_block;
sector_count_t max_map_count=0;
char pname[PMAP_STRING_SIZE+1];
char ptype[PMAP_STRING_SIZE+1];
list_element_t iter;
LOG_ENTRY();
REQUIRE(ld);
REQUIRE(md);
disk_pdata = get_mac_disk_private_data(ld);
REQUIRE(disk_pdata);
buffer = malloc(md->size * EVMS_VSECTOR_SIZE);
REQUIRE(buffer != NULL);
disklabel = (mac_disklabel_t *) buffer;
// read mac info & verify we have valid disk label
rc = READ( ld, md->start, md->size, buffer );
if (!rc) {
if ( MAC_DISK_TO_CPU16(disklabel->signature) != MAC_DISK_MAGIC) {
rc = EINVAL;
}
}
if (!rc) {
vsectors_per_block = MAC_DISK_TO_CPU16(disklabel->block_size)>>EVMS_VSECTOR_SIZE_SHIFT;
pmap = buffer + (vsectors_per_block*EVMS_VSECTOR_SIZE);
max_map_count = md->size - vsectors_per_block;
}
else {
free(buffer);
LOG_EXIT_INT(rc);
return rc;
}
// walk through the partition table, removing all linux partition records
// by replacing them with Apple Scratch records
LOG_DEBUG("there should be %d partition records\n", disk_pdata->pcount);
for ( i=0; (i<max_map_count)&&(rc==0); i++ ) {
p = (mac_partition_t *) (pmap + (i*vsectors_per_block*EVMS_VSECTOR_SIZE));
strncpy(pname, p->name, PMAP_STRING_SIZE);
strncpy(ptype, p->type, PMAP_STRING_SIZE);
LOG_DEBUG( " Index (%d): type: %s name: %s\n", i, ptype, pname );
if ( MAC_DISK_TO_CPU32(p->status) & MAC_STATUS_VALID ) {
if ( isa_mac_data_partition(p) == TRUE ) {
LOG_DEBUG(" clearing the entry\n");
memset( (void *) p, 0, sizeof(mac_partition_t) );
}
else {
LOG_DEBUG(" not clearing entry\n");
}
}
else { // we have run off the end of the partition table
LOG_DEBUG("oops ... invalid partition record\n");
break;
}
}
// now walk through the segment list on this drive and add each
// segment to the PMAP
LIST_FOR_EACH( ld->parent_objects, iter, seg ) {
if (seg->data_type == DATA_TYPE) {
LOG_DEBUG(" adding segment %s to the pmap\n", seg->name);
pdata = (seg_private_data_t *) seg->private_data;
for ( i=0,rc=ENOSPC; (rc!=0) && (i<max_map_count); i++ ) {
p = (mac_partition_t *) (pmap + (i*vsectors_per_block*EVMS_VSECTOR_SIZE));
if ( isa_mac_null_partition(p)==TRUE) {
rc = 0;
}
}
if (!rc) {
memcpy( (void *) p, (void *) &pdata->p_record, sizeof(mac_partition_t) );
}
}
}
// tally up the partitions to get a current map count
map_count = 0;
for ( i=0; i<max_map_count; i++) {
p = (mac_partition_t *) (pmap + (i*vsectors_per_block*EVMS_VSECTOR_SIZE));
if ( MAC_DISK_TO_CPU32(p->status) & MAC_STATUS_VALID ) {
++map_count;
}
}
// keep map count current in the disk private data
disk_pdata->pcount = map_count;
// update the map_count in each partition record
count = 0;
for ( i=0; i<max_map_count && count<map_count; i++) {
p = (mac_partition_t *) (pmap + (i*vsectors_per_block*EVMS_VSECTOR_SIZE));
if ( MAC_DISK_TO_CPU32(p->status) & MAC_STATUS_VALID ) {
p->map_count = CPU_TO_MAC_DISK32(map_count);
++count;
}
}
// commit changes
if (backup) {
rc = EngFncs->save_metadata( parent->name, ld->name,
md->start, md->size, buffer );
} else {
rc = WRITE( ld, md->start, md->size, buffer );
}
LOG_EXIT_INT(rc);
return rc;
}
/*
* Function: commit_mac_metadata
*
* Called to commit the mac disk label information.
*/
int commit_mac_segments( DISKSEG *seg, LOGICALDISK *ld, uint commit_phase )
{
int rc=0;
LOG_ENTRY();
REQUIRE(ld != NULL);
REQUIRE(seg != NULL);
if (seg->data_type == META_DATA_TYPE) {
rc = do_mac_commit( ld, seg, NULL, FALSE );
if (!rc) {
seg->flags &= ~SOFLAG_DIRTY;
}
}
else {
seg->flags &= ~SOFLAG_DIRTY;
}
LOG_EXIT_INT(rc);
return rc;
}
|
