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    Annotation of /trunk/mkinitrd-magellan/busybox/util-linux/volume_id/unused_mac.c

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    Revision 984 - (hide annotations) (download)
    Sun May 30 11:32:42 2010 UTC (14 years ago) by niro
    File MIME type: text/plain
    File size: 3809 byte(s) 
    -updated to busybox-1.16.1 and enabled blkid/uuid support in default config
    1 niro 816 /*
    2     * volume_id - reads filesystem label and uuid
    3     *
    4     * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
    5     *
    6     * This library is free software; you can redistribute it and/or
    7     * modify it under the terms of the GNU Lesser General Public
    8     * License as published by the Free Software Foundation; either
    9     * version 2.1 of the License, or (at your option) any later version.
    10     *
    11     * This library is distributed in the hope that it will be useful,
    12     * but WITHOUT ANY WARRANTY; without even the implied warranty of
    13     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    14     * Lesser General Public License for more details.
    15     *
    16     * You should have received a copy of the GNU Lesser General Public
    17     * License along with this library; if not, write to the Free Software
    18     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    19     */
    20    
    21     #include "volume_id_internal.h"
    22    
    23     struct mac_driver_desc {
    24     uint8_t signature[2];
    25     uint16_t block_size;
    26     uint32_t block_count;
    27 niro 984 } PACKED;
    28 niro 816
    29     struct mac_partition {
    30     uint8_t signature[2];
    31     uint16_t res1;
    32     uint32_t map_count;
    33     uint32_t start_block;
    34     uint32_t block_count;
    35     uint8_t name[32];
    36     uint8_t type[32];
    37 niro 984 } PACKED;
    38 niro 816
    39 niro 984 int FAST_FUNC volume_id_probe_mac_partition_map(struct volume_id *id, uint64_t off)
    40 niro 816 {
    41     const uint8_t *buf;
    42     struct mac_driver_desc *driver;
    43     struct mac_partition *part;
    44    
    45     dbg("probing at offset 0x%llx", (unsigned long long) off);
    46    
    47     buf = volume_id_get_buffer(id, off, 0x200);
    48     if (buf == NULL)
    49     return -1;
    50    
    51     part = (struct mac_partition *) buf;
    52     if (part->signature[0] == 'P' && part->signature[1] == 'M' /* "PM" */
    53     && (memcmp(part->type, "Apple_partition_map", 19) == 0)
    54     ) {
    55     /* linux creates an own subdevice for the map
    56     * just return the type if the drive header is missing */
    57     // volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
    58     // id->type = "mac_partition_map";
    59     return 0;
    60     }
    61    
    62     driver = (struct mac_driver_desc *) buf;
    63     if (driver->signature[0] == 'E' && driver->signature[1] == 'R') { /* "ER" */
    64     /* we are on a main device, like a CD
    65     * just try to probe the first partition from the map */
    66     unsigned bsize = be16_to_cpu(driver->block_size);
    67     int part_count;
    68     int i;
    69    
    70     /* get first entry of partition table */
    71     buf = volume_id_get_buffer(id, off + bsize, 0x200);
    72     if (buf == NULL)
    73     return -1;
    74    
    75     part = (struct mac_partition *) buf;
    76     if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
    77     return -1;
    78    
    79     part_count = be32_to_cpu(part->map_count);
    80     dbg("expecting %d partition entries", part_count);
    81    
    82     if (id->partitions != NULL)
    83     free(id->partitions);
    84     id->partitions = xzalloc(part_count * sizeof(struct volume_id_partition));
    85    
    86     id->partition_count = part_count;
    87    
    88     for (i = 0; i < part_count; i++) {
    89     uint64_t poff;
    90     uint64_t plen;
    91    
    92     buf = volume_id_get_buffer(id, off + ((i+1) * bsize), 0x200);
    93     if (buf == NULL)
    94     return -1;
    95    
    96     part = (struct mac_partition *) buf;
    97     if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
    98     return -1;
    99    
    100     poff = be32_to_cpu(part->start_block) * bsize;
    101     plen = be32_to_cpu(part->block_count) * bsize;
    102     dbg("found '%s' partition entry at 0x%llx, len 0x%llx",
    103     part->type, (unsigned long long) poff,
    104     (unsigned long long) plen);
    105    
    106     // id->partitions[i].pt_off = poff;
    107     // id->partitions[i].pt_len = plen;
    108    
    109     // if (memcmp(part->type, "Apple_Free", 10) == 0) {
    110     // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNUSED);
    111     // } else if (memcmp(part->type, "Apple_partition_map", 19) == 0) {
    112     // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_PARTITIONTABLE);
    113     // } else {
    114     // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNPROBED);
    115     // }
    116     }
    117     // volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
    118     // id->type = "mac_partition_map";
    119     return 0;
    120     }
    121    
    122     return -1;
    123     }