[834df50] | 1 | /** |
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| 2 | * @file |
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| 3 | * |
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[4670d91] | 4 | * @ingroup rtems_bdpart |
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| 5 | * |
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[834df50] | 6 | * Block device partition management. |
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| 7 | */ |
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| 8 | |
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| 9 | /* |
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| 10 | * Copyright (c) 2009 |
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| 11 | * embedded brains GmbH |
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| 12 | * Obere Lagerstr. 30 |
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| 13 | * D-82178 Puchheim |
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| 14 | * Germany |
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| 15 | * <rtems@embedded-brains.de> |
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| 16 | * |
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| 17 | * The license and distribution terms for this file may be |
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| 18 | * found in the file LICENSE in this distribution or at |
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| 19 | * http://www.rtems.com/license/LICENSE. |
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| 20 | */ |
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| 21 | |
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| 22 | #include <inttypes.h> |
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| 23 | #include <stdio.h> |
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| 24 | #include <stdlib.h> |
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| 25 | #include <string.h> |
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| 26 | #include <unistd.h> |
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| 27 | #include <sys/stat.h> |
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| 28 | #include <sys/types.h> |
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| 29 | |
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| 30 | #include <rtems/bdbuf.h> |
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| 31 | #include <rtems/bdpart.h> |
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| 32 | #include <rtems/dosfs.h> |
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| 33 | #include <rtems/endian.h> |
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| 34 | #include <rtems/fsmount.h> |
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| 35 | |
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| 36 | #define RTEMS_BDPART_MBR_PARTITION_TYPE( type) \ |
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| 37 | { \ |
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| 38 | (type), 0xa2U, 0x2eU, 0x38U, \ |
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| 39 | 0x38U, 0xb5U, 0xdeU, 0x11U, \ |
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| 40 | 0xbcU, 0x13U, 0x00U, 0x1dU, \ |
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| 41 | 0x09U, 0xb0U, 0x5fU, 0xa4U \ |
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| 42 | } |
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| 43 | |
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| 44 | #define RTEMS_BDPART_BLOCK_SIZE 512 |
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| 45 | |
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| 46 | #define RTEMS_BDPART_MBR_CYLINDER_SIZE 63 |
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| 47 | |
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| 48 | #define RTEMS_BDPART_MBR_TABLE_ENTRY_SIZE 16 |
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| 49 | |
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| 50 | #define RTEMS_BDPART_MBR_OFFSET_TABLE_0 446 |
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| 51 | |
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| 52 | #define RTEMS_BDPART_MBR_OFFSET_TABLE_1 \ |
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| 53 | (RTEMS_BDPART_MBR_OFFSET_TABLE_0 + RTEMS_BDPART_MBR_TABLE_ENTRY_SIZE) |
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| 54 | |
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| 55 | #define RTEMS_BDPART_MBR_OFFSET_DISK_ID 440 |
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| 56 | |
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| 57 | #define RTEMS_BDPART_MBR_OFFSET_SIGNATURE_0 510 |
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| 58 | |
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| 59 | #define RTEMS_BDPART_MBR_OFFSET_SIGNATURE_1 511 |
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| 60 | |
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| 61 | #define RTEMS_BDPART_MBR_SIGNATURE_0 0x55U |
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| 62 | |
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| 63 | #define RTEMS_BDPART_MBR_SIGNATURE_1 0xaaU |
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| 64 | |
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| 65 | #define RTEMS_BDPART_MBR_OFFSET_BEGIN 8 |
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| 66 | |
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| 67 | #define RTEMS_BDPART_MBR_OFFSET_SIZE 12 |
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| 68 | |
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| 69 | #define RTEMS_BDPART_MBR_OFFSET_TYPE 4 |
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| 70 | |
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| 71 | #define RTEMS_BDPART_MBR_OFFSET_FLAGS 0 |
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| 72 | |
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| 73 | #define RTEMS_BDPART_PARTITION_READ_MAX 32 |
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| 74 | |
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| 75 | static const uuid_t RTEMS_BDPART_MBR_MASTER_TYPE = |
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| 76 | RTEMS_BDPART_MBR_PARTITION_TYPE( RTEMS_BDPART_MBR_EMPTY); |
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| 77 | |
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| 78 | void rtems_bdpart_to_partition_type( uint8_t mbr_type, uuid_t type) |
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| 79 | { |
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| 80 | type [0] = mbr_type; |
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| 81 | memcpy( type + 1, RTEMS_BDPART_MBR_MASTER_TYPE + 1, sizeof( uuid_t) - 1); |
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| 82 | } |
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| 83 | |
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| 84 | static uint8_t rtems_bdpart_mbr_partition_type( |
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| 85 | const uuid_t type |
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| 86 | ) |
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| 87 | { |
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| 88 | return type [0]; |
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| 89 | } |
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| 90 | |
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| 91 | bool rtems_bdpart_to_mbr_partition_type( |
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| 92 | const uuid_t type, |
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| 93 | uint8_t *mbr_type |
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| 94 | ) |
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| 95 | { |
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| 96 | *mbr_type = rtems_bdpart_mbr_partition_type( type); |
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| 97 | |
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| 98 | return memcmp( |
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| 99 | type + 1, |
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| 100 | RTEMS_BDPART_MBR_MASTER_TYPE + 1, |
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| 101 | sizeof( uuid_t) - 1 |
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| 102 | ) == 0; |
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| 103 | } |
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| 104 | |
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| 105 | static void rtems_bdpart_type_to_string( |
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| 106 | const uuid_t type, |
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| 107 | char str [37] |
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| 108 | ) |
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| 109 | { |
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| 110 | uuid_unparse_lower( type, str); |
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| 111 | } |
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| 112 | |
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[7baa484] | 113 | /* |
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| 114 | * FIXME: This code should the deviceio interface and not the bdbug interface. |
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| 115 | */ |
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[834df50] | 116 | static rtems_status_code rtems_bdpart_get_disk_data( |
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| 117 | const char *disk_name, |
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| 118 | dev_t *disk, |
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| 119 | rtems_blkdev_bnum *disk_end |
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| 120 | ) |
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| 121 | { |
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| 122 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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| 123 | int rv = 0; |
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| 124 | rtems_blkdev_bnum disk_begin = 0; |
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| 125 | rtems_blkdev_bnum block_size = 0; |
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| 126 | rtems_disk_device *dd = NULL; |
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| 127 | struct stat st; |
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| 128 | |
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| 129 | /* Get disk handle */ |
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| 130 | rv = stat( disk_name, &st); |
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| 131 | if (rv != 0) { |
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| 132 | return RTEMS_INVALID_NAME; |
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| 133 | } |
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[7baa484] | 134 | *disk = st.st_rdev; |
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[834df50] | 135 | |
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| 136 | /* Get disk begin, end and block size */ |
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| 137 | dd = rtems_disk_obtain( *disk); |
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| 138 | if (dd == NULL) { |
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| 139 | return RTEMS_INVALID_NAME; |
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| 140 | } |
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| 141 | disk_begin = dd->start; |
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| 142 | *disk_end = dd->size; |
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| 143 | block_size = dd->block_size; |
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| 144 | sc = rtems_disk_release( dd); |
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| 145 | if (sc != RTEMS_SUCCESSFUL) { |
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| 146 | return sc; |
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| 147 | } |
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| 148 | |
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| 149 | /* Check block size */ |
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| 150 | if (block_size < RTEMS_BDPART_BLOCK_SIZE) { |
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| 151 | return RTEMS_IO_ERROR; |
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| 152 | } |
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| 153 | |
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| 154 | /* Check that we have do not have a logical disk */ |
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| 155 | if (disk_begin != 0) { |
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| 156 | return RTEMS_IO_ERROR; |
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| 157 | } |
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| 158 | |
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| 159 | return RTEMS_SUCCESSFUL; |
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| 160 | } |
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| 161 | |
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| 162 | static int rtems_bdpart_partition_compare( const void *aa, const void *bb) |
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| 163 | { |
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| 164 | const rtems_bdpart_partition *a = aa; |
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| 165 | const rtems_bdpart_partition *b = bb; |
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| 166 | |
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| 167 | if (a->begin < b->begin) { |
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| 168 | return -1; |
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| 169 | } else if (a->begin == b->begin) { |
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| 170 | return 0; |
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| 171 | } else { |
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| 172 | return 1; |
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| 173 | } |
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| 174 | } |
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| 175 | |
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| 176 | static bool rtems_bdpart_is_valid_record( const uint8_t *data) |
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| 177 | { |
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| 178 | return data [RTEMS_BDPART_MBR_OFFSET_SIGNATURE_0] |
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| 179 | == RTEMS_BDPART_MBR_SIGNATURE_0 |
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| 180 | && data [RTEMS_BDPART_MBR_OFFSET_SIGNATURE_1] |
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| 181 | == RTEMS_BDPART_MBR_SIGNATURE_1; |
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| 182 | } |
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| 183 | |
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| 184 | static rtems_blkdev_bnum rtems_bdpart_next_ebr( const uint8_t *data) |
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| 185 | { |
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| 186 | rtems_blkdev_bnum begin = |
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| 187 | rtems_uint32_from_little_endian( data + RTEMS_BDPART_MBR_OFFSET_BEGIN); |
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| 188 | uint8_t type = data [RTEMS_BDPART_MBR_OFFSET_TYPE]; |
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| 189 | |
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| 190 | if (type == RTEMS_BDPART_MBR_EXTENDED) { |
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| 191 | return begin; |
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| 192 | } else { |
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| 193 | return 0; |
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| 194 | } |
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| 195 | } |
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| 196 | |
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| 197 | static rtems_status_code rtems_bdpart_read_mbr_partition( |
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| 198 | const uint8_t *data, |
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| 199 | rtems_bdpart_partition **p, |
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| 200 | const rtems_bdpart_partition *p_end, |
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| 201 | rtems_blkdev_bnum *ep_begin |
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| 202 | ) |
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| 203 | { |
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| 204 | rtems_blkdev_bnum begin = |
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| 205 | rtems_uint32_from_little_endian( data + RTEMS_BDPART_MBR_OFFSET_BEGIN); |
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| 206 | rtems_blkdev_bnum size = |
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| 207 | rtems_uint32_from_little_endian( data + RTEMS_BDPART_MBR_OFFSET_SIZE); |
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| 208 | rtems_blkdev_bnum end = begin + size; |
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| 209 | uint8_t type = data [RTEMS_BDPART_MBR_OFFSET_TYPE]; |
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| 210 | |
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| 211 | if (type == RTEMS_BDPART_MBR_EMPTY) { |
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| 212 | return RTEMS_SUCCESSFUL; |
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| 213 | } else if (*p == p_end) { |
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| 214 | return RTEMS_TOO_MANY; |
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| 215 | } else if (begin >= end) { |
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| 216 | return RTEMS_IO_ERROR; |
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| 217 | } else if (type == RTEMS_BDPART_MBR_EXTENDED) { |
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| 218 | if (ep_begin != NULL) { |
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| 219 | *ep_begin = begin; |
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| 220 | } |
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| 221 | } else { |
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| 222 | /* Increment partition index */ |
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| 223 | ++(*p); |
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| 224 | |
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| 225 | /* Clear partition */ |
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| 226 | memset( *p, 0, sizeof( rtems_bdpart_partition)); |
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| 227 | |
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| 228 | /* Set values */ |
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| 229 | (*p)->begin = begin; |
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| 230 | (*p)->end = end; |
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| 231 | rtems_bdpart_to_partition_type( type, (*p)->type); |
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| 232 | (*p)->flags = data [RTEMS_BDPART_MBR_OFFSET_FLAGS]; |
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| 233 | } |
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| 234 | |
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| 235 | return RTEMS_SUCCESSFUL; |
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| 236 | } |
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| 237 | |
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| 238 | static void rtems_bdpart_write_mbr_partition( |
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| 239 | uint8_t *data, |
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| 240 | uint32_t begin, |
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| 241 | uint32_t size, |
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| 242 | uint8_t type, |
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| 243 | uint8_t flags |
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| 244 | ) |
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| 245 | { |
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| 246 | rtems_uint32_to_little_endian( begin, data + RTEMS_BDPART_MBR_OFFSET_BEGIN); |
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| 247 | rtems_uint32_to_little_endian( size, data + RTEMS_BDPART_MBR_OFFSET_SIZE); |
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| 248 | data [RTEMS_BDPART_MBR_OFFSET_TYPE] = type; |
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| 249 | data [RTEMS_BDPART_MBR_OFFSET_FLAGS] = flags; |
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| 250 | } |
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| 251 | |
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| 252 | static rtems_status_code rtems_bdpart_read_record( |
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| 253 | dev_t disk, |
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| 254 | rtems_blkdev_bnum index, |
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| 255 | rtems_bdbuf_buffer **block |
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| 256 | ) |
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| 257 | { |
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| 258 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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| 259 | |
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| 260 | /* Release previous block if necessary */ |
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| 261 | if (*block != NULL) { |
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| 262 | sc = rtems_bdbuf_release( *block); |
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| 263 | if (sc != RTEMS_SUCCESSFUL) { |
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| 264 | return sc; |
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| 265 | } |
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| 266 | } |
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| 267 | |
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| 268 | /* Read the record block */ |
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| 269 | sc = rtems_bdbuf_read( disk, index, block); |
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| 270 | if (sc != RTEMS_SUCCESSFUL) { |
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| 271 | return sc; |
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| 272 | } |
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| 273 | |
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| 274 | /* Check MBR signature */ |
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| 275 | if (!rtems_bdpart_is_valid_record( (*block)->buffer)) { |
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| 276 | return RTEMS_IO_ERROR; |
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| 277 | } |
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| 278 | |
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| 279 | return RTEMS_SUCCESSFUL; |
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| 280 | } |
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| 281 | |
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| 282 | static rtems_status_code rtems_bdpart_new_record( |
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| 283 | dev_t disk, |
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| 284 | rtems_blkdev_bnum index, |
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| 285 | rtems_bdbuf_buffer **block |
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| 286 | ) |
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| 287 | { |
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| 288 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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| 289 | |
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| 290 | /* Synchronize previous block if necessary */ |
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| 291 | if (*block != NULL) { |
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| 292 | sc = rtems_bdbuf_sync( *block); |
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| 293 | if (sc != RTEMS_SUCCESSFUL) { |
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| 294 | return sc; |
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| 295 | } |
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| 296 | } |
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| 297 | |
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| 298 | /* Read the new record block (this accounts for disk block sizes > 512) */ |
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| 299 | sc = rtems_bdbuf_read( disk, index, block); |
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| 300 | if (sc != RTEMS_SUCCESSFUL) { |
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| 301 | return sc; |
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| 302 | } |
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| 303 | |
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| 304 | /* Clear record */ |
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| 305 | memset( (*block)->buffer, 0, RTEMS_BDPART_BLOCK_SIZE); |
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| 306 | |
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| 307 | /* Write signature */ |
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| 308 | (*block)->buffer [RTEMS_BDPART_MBR_OFFSET_SIGNATURE_0] = |
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| 309 | RTEMS_BDPART_MBR_SIGNATURE_0; |
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| 310 | (*block)->buffer [RTEMS_BDPART_MBR_OFFSET_SIGNATURE_1] = |
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| 311 | RTEMS_BDPART_MBR_SIGNATURE_1; |
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| 312 | |
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| 313 | return RTEMS_SUCCESSFUL; |
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| 314 | } |
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| 315 | |
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| 316 | rtems_status_code rtems_bdpart_read( |
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| 317 | const char *disk_name, |
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| 318 | rtems_bdpart_format *format, |
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| 319 | rtems_bdpart_partition *pt, |
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| 320 | size_t *count |
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| 321 | ) |
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| 322 | { |
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| 323 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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| 324 | rtems_status_code esc = RTEMS_SUCCESSFUL; |
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| 325 | rtems_bdbuf_buffer *block = NULL; |
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| 326 | rtems_bdpart_partition *p = pt - 1; |
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[4670d91] | 327 | const rtems_bdpart_partition *p_end = pt + (count != NULL ? *count : 0); |
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[834df50] | 328 | rtems_blkdev_bnum ep_begin = 0; /* Extended partition begin */ |
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| 329 | rtems_blkdev_bnum ebr = 0; /* Extended boot record block index */ |
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| 330 | rtems_blkdev_bnum disk_end = 0; |
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| 331 | dev_t disk = 0; |
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| 332 | size_t i = 0; |
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| 333 | const uint8_t *data = NULL; |
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| 334 | |
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| 335 | /* Check parameter */ |
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| 336 | if (format == NULL || pt == NULL || count == NULL) { |
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| 337 | return RTEMS_INVALID_ADDRESS; |
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| 338 | } |
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| 339 | |
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[4670d91] | 340 | /* Set count to a save value */ |
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[834df50] | 341 | *count = 0; |
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| 342 | |
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| 343 | /* Get disk data */ |
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| 344 | sc = rtems_bdpart_get_disk_data( disk_name, &disk, &disk_end); |
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| 345 | if (sc != RTEMS_SUCCESSFUL) { |
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| 346 | return sc; |
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| 347 | } |
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| 348 | |
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| 349 | /* Read MBR */ |
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| 350 | sc = rtems_bdpart_read_record( disk, 0, &block); |
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| 351 | if (sc != RTEMS_SUCCESSFUL) { |
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| 352 | return sc; |
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| 353 | } |
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| 354 | |
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| 355 | /* Read the first partition entry */ |
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| 356 | data = block->buffer + RTEMS_BDPART_MBR_OFFSET_TABLE_0; |
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| 357 | sc = rtems_bdpart_read_mbr_partition( data, &p, p_end, &ep_begin); |
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| 358 | if (sc != RTEMS_SUCCESSFUL) { |
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| 359 | esc = sc; |
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| 360 | goto cleanup; |
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| 361 | } |
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| 362 | |
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| 363 | /* Determine if we have a MBR or GPT format */ |
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| 364 | if (rtems_bdpart_mbr_partition_type( p->type) == RTEMS_BDPART_MBR_GPT) { |
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| 365 | esc = RTEMS_NOT_IMPLEMENTED; |
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| 366 | goto cleanup; |
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| 367 | } |
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| 368 | |
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| 369 | /* Set format */ |
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| 370 | format->type = RTEMS_BDPART_FORMAT_MBR; |
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| 371 | format->mbr.disk_id = rtems_uint32_from_little_endian( |
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| 372 | block->buffer + RTEMS_BDPART_MBR_OFFSET_DISK_ID |
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| 373 | ); |
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| 374 | format->mbr.dos_compatibility = true; |
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| 375 | |
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| 376 | /* Iterate through the rest of the primary partition table */ |
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| 377 | for (i = 1; i < 4; ++i) { |
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| 378 | data += RTEMS_BDPART_MBR_TABLE_ENTRY_SIZE; |
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| 379 | |
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| 380 | sc = rtems_bdpart_read_mbr_partition( data, &p, p_end, &ep_begin); |
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| 381 | if (sc != RTEMS_SUCCESSFUL) { |
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| 382 | esc = sc; |
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| 383 | goto cleanup; |
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| 384 | } |
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| 385 | } |
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| 386 | |
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| 387 | /* Iterate through the logical partitions within the extended partition */ |
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| 388 | ebr = ep_begin; |
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| 389 | while (ebr != 0) { |
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| 390 | rtems_blkdev_bnum tmp = 0; |
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| 391 | |
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| 392 | /* Read EBR */ |
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| 393 | sc = rtems_bdpart_read_record( disk, ebr, &block); |
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| 394 | if (sc != RTEMS_SUCCESSFUL) { |
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| 395 | return sc; |
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| 396 | } |
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| 397 | |
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| 398 | /* Read first partition entry */ |
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| 399 | sc = rtems_bdpart_read_mbr_partition( |
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| 400 | block->buffer + RTEMS_BDPART_MBR_OFFSET_TABLE_0, |
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| 401 | &p, |
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| 402 | p_end, |
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| 403 | NULL |
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| 404 | ); |
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| 405 | if (sc != RTEMS_SUCCESSFUL) { |
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| 406 | esc = sc; |
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| 407 | goto cleanup; |
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| 408 | } |
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| 409 | |
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| 410 | /* Adjust partition begin */ |
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| 411 | tmp = p->begin + ebr; |
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| 412 | if (tmp > p->begin) { |
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| 413 | p->begin = tmp; |
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| 414 | } else { |
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| 415 | esc = RTEMS_IO_ERROR; |
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| 416 | goto cleanup; |
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| 417 | } |
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| 418 | |
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| 419 | /* Adjust partition end */ |
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| 420 | tmp = p->end + ebr; |
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| 421 | if (tmp > p->end) { |
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| 422 | p->end = tmp; |
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| 423 | } else { |
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| 424 | esc = RTEMS_IO_ERROR; |
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| 425 | goto cleanup; |
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| 426 | } |
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| 427 | |
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| 428 | /* Read second partition entry for next EBR block */ |
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| 429 | ebr = rtems_bdpart_next_ebr( |
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| 430 | block->buffer + RTEMS_BDPART_MBR_OFFSET_TABLE_1 |
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| 431 | ); |
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| 432 | if (ebr != 0) { |
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| 433 | /* Adjust partition EBR block index */ |
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| 434 | tmp = ebr + ep_begin; |
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| 435 | if (tmp > ebr) { |
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| 436 | ebr = tmp; |
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| 437 | } else { |
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| 438 | esc = RTEMS_IO_ERROR; |
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| 439 | goto cleanup; |
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| 440 | } |
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| 441 | } |
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| 442 | } |
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| 443 | |
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| 444 | /* Return partition count */ |
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| 445 | *count = (size_t) (p - pt + 1); |
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| 446 | |
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| 447 | cleanup: |
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| 448 | |
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| 449 | if (block != NULL) { |
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| 450 | rtems_bdbuf_release( block); |
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| 451 | } |
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| 452 | |
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| 453 | return esc; |
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| 454 | } |
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| 455 | |
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| 456 | void rtems_bdpart_sort( rtems_bdpart_partition *pt, size_t count) |
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| 457 | { |
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| 458 | qsort( pt, count, sizeof( *pt), rtems_bdpart_partition_compare); |
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| 459 | } |
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| 460 | |
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| 461 | rtems_status_code rtems_bdpart_write( |
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| 462 | const char *disk_name, |
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| 463 | const rtems_bdpart_format *format, |
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| 464 | const rtems_bdpart_partition *pt, |
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| 465 | size_t count |
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| 466 | ) |
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| 467 | { |
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| 468 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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| 469 | rtems_status_code esc = RTEMS_SUCCESSFUL; |
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[4670d91] | 470 | bool dos_compatibility = format != NULL |
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| 471 | && format->type == RTEMS_BDPART_FORMAT_MBR |
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[834df50] | 472 | && format->mbr.dos_compatibility; |
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| 473 | rtems_bdbuf_buffer *block = NULL; |
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| 474 | rtems_blkdev_bnum disk_end = 0; |
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| 475 | rtems_blkdev_bnum record_space = |
---|
| 476 | dos_compatibility ? RTEMS_BDPART_MBR_CYLINDER_SIZE : 1; |
---|
| 477 | dev_t disk = 0; |
---|
| 478 | size_t ppc = 0; /* Primary partition count */ |
---|
| 479 | size_t i = 0; |
---|
| 480 | uint8_t *data = NULL; |
---|
| 481 | |
---|
| 482 | /* Check if we have something to do */ |
---|
| 483 | if (count == 0) { |
---|
| 484 | /* Nothing to do */ |
---|
| 485 | return RTEMS_SUCCESSFUL; |
---|
| 486 | } |
---|
| 487 | |
---|
| 488 | /* Check parameter */ |
---|
| 489 | if (format == NULL || pt == NULL) { |
---|
| 490 | return RTEMS_INVALID_ADDRESS; |
---|
| 491 | } |
---|
| 492 | |
---|
| 493 | /* Get disk data */ |
---|
| 494 | sc = rtems_bdpart_get_disk_data( disk_name, &disk, &disk_end); |
---|
| 495 | if (sc != RTEMS_SUCCESSFUL) { |
---|
| 496 | return sc; |
---|
| 497 | } |
---|
| 498 | |
---|
| 499 | /* Align end of disk on cylinder boundary if necessary */ |
---|
| 500 | if (dos_compatibility) { |
---|
| 501 | disk_end -= (disk_end % record_space); |
---|
| 502 | } |
---|
| 503 | |
---|
| 504 | /* Check that we have a consistent partition table */ |
---|
| 505 | for (i = 0; i < count; ++i) { |
---|
| 506 | const rtems_bdpart_partition *p = pt + i; |
---|
| 507 | |
---|
| 508 | /* Check that begin and end are proper within the disk */ |
---|
| 509 | if (p->begin >= disk_end || p->end > disk_end) { |
---|
| 510 | esc = RTEMS_INVALID_NUMBER; |
---|
| 511 | goto cleanup; |
---|
| 512 | } |
---|
| 513 | |
---|
| 514 | /* Check that begin and end are valid */ |
---|
| 515 | if (p->begin >= p->end) { |
---|
| 516 | esc = RTEMS_INVALID_NUMBER; |
---|
| 517 | goto cleanup; |
---|
| 518 | } |
---|
| 519 | |
---|
| 520 | /* Check that partitions do not overlap */ |
---|
| 521 | if (i > 0 && pt [i - 1].end > p->begin) { |
---|
| 522 | esc = RTEMS_INVALID_NUMBER; |
---|
| 523 | goto cleanup; |
---|
| 524 | } |
---|
| 525 | } |
---|
| 526 | |
---|
| 527 | /* Check format */ |
---|
| 528 | if (format->type != RTEMS_BDPART_FORMAT_MBR) { |
---|
| 529 | esc = RTEMS_NOT_IMPLEMENTED; |
---|
| 530 | goto cleanup; |
---|
| 531 | } |
---|
| 532 | |
---|
| 533 | /* |
---|
| 534 | * Set primary partition count. If we have more than four partitions we need |
---|
| 535 | * an extended partition which will contain the partitions of number four and |
---|
| 536 | * above as logical partitions. If we have four or less partitions we can |
---|
| 537 | * use the primary partition table. |
---|
| 538 | */ |
---|
| 539 | ppc = count <= 4 ? count : 3; |
---|
| 540 | |
---|
| 541 | /* |
---|
| 542 | * Check that the first primary partition starts at head one and sector one |
---|
| 543 | * under the virtual one head and 63 sectors geometry if necessary. |
---|
| 544 | */ |
---|
| 545 | if (dos_compatibility && pt [0].begin != RTEMS_BDPART_MBR_CYLINDER_SIZE) { |
---|
| 546 | esc = RTEMS_INVALID_NUMBER; |
---|
| 547 | goto cleanup; |
---|
| 548 | } |
---|
| 549 | |
---|
| 550 | /* |
---|
| 551 | * Check that we have enough space for the EBRs. The partitions with number |
---|
| 552 | * four and above are logical partitions if we have more than four partitions |
---|
| 553 | * in total. The logical partitions are contained in the extended partition. |
---|
| 554 | * Each logical partition is described via one EBR preceding the partition. |
---|
| 555 | * The space for the EBR and maybe some space which is needed for DOS |
---|
| 556 | * compatibility resides between the partitions. So there have to be gaps of |
---|
| 557 | * the appropriate size between the partitions. |
---|
| 558 | */ |
---|
| 559 | for (i = ppc; i < count; ++i) { |
---|
| 560 | if ((pt [i].begin - pt [i - 1].end) < record_space) { |
---|
| 561 | esc = RTEMS_INVALID_NUMBER; |
---|
| 562 | goto cleanup; |
---|
| 563 | } |
---|
| 564 | } |
---|
| 565 | |
---|
| 566 | /* Check that we can convert the parition descriptions to the MBR format */ |
---|
| 567 | for (i = 0; i < count; ++i) { |
---|
| 568 | uint8_t type = 0; |
---|
| 569 | |
---|
| 570 | const rtems_bdpart_partition *p = pt + i; |
---|
| 571 | |
---|
| 572 | /* Check type */ |
---|
| 573 | if (!rtems_bdpart_to_mbr_partition_type( p->type, &type)) { |
---|
| 574 | esc = RTEMS_INVALID_ID; |
---|
| 575 | goto cleanup; |
---|
| 576 | } |
---|
| 577 | |
---|
| 578 | /* Check flags */ |
---|
| 579 | if (p->flags > 0xffU) { |
---|
| 580 | esc = RTEMS_INVALID_ID; |
---|
| 581 | goto cleanup; |
---|
| 582 | } |
---|
| 583 | |
---|
| 584 | /* Check ID */ |
---|
| 585 | /* TODO */ |
---|
| 586 | } |
---|
| 587 | |
---|
| 588 | /* New MBR */ |
---|
| 589 | sc = rtems_bdpart_new_record( disk, 0, &block); |
---|
| 590 | if (sc != RTEMS_SUCCESSFUL) { |
---|
| 591 | esc = sc; |
---|
| 592 | goto cleanup; |
---|
| 593 | } |
---|
| 594 | |
---|
| 595 | /* Write disk ID */ |
---|
| 596 | rtems_uint32_to_little_endian( |
---|
| 597 | format->mbr.disk_id, |
---|
| 598 | block->buffer + RTEMS_BDPART_MBR_OFFSET_DISK_ID |
---|
| 599 | ); |
---|
| 600 | |
---|
| 601 | /* Write primary partition table */ |
---|
| 602 | data = block->buffer + RTEMS_BDPART_MBR_OFFSET_TABLE_0; |
---|
| 603 | for (i = 0; i < ppc; ++i) { |
---|
| 604 | const rtems_bdpart_partition *p = pt + i; |
---|
| 605 | |
---|
| 606 | /* Write partition entry */ |
---|
| 607 | rtems_bdpart_write_mbr_partition( |
---|
| 608 | data, |
---|
| 609 | p->begin, |
---|
| 610 | p->end - p->begin, |
---|
| 611 | rtems_bdpart_mbr_partition_type( p->type), |
---|
| 612 | (uint8_t) p->flags |
---|
| 613 | ); |
---|
| 614 | |
---|
| 615 | data += RTEMS_BDPART_MBR_TABLE_ENTRY_SIZE; |
---|
| 616 | } |
---|
| 617 | |
---|
| 618 | /* Write extended partition with logical partitions if necessary */ |
---|
| 619 | if (ppc != count) { |
---|
| 620 | rtems_blkdev_bnum ebr = 0; /* Extended boot record block index */ |
---|
| 621 | |
---|
| 622 | /* Begin of extended partition */ |
---|
| 623 | rtems_blkdev_bnum ep_begin = pt [ppc].begin - record_space; |
---|
| 624 | |
---|
| 625 | /* Write extended partition */ |
---|
| 626 | rtems_bdpart_write_mbr_partition( |
---|
| 627 | data, |
---|
| 628 | ep_begin, |
---|
| 629 | disk_end - ep_begin, |
---|
| 630 | RTEMS_BDPART_MBR_EXTENDED, |
---|
| 631 | 0 |
---|
| 632 | ); |
---|
| 633 | |
---|
| 634 | /* Write logical partitions */ |
---|
| 635 | for (i = ppc; i < count; ++i) { |
---|
| 636 | const rtems_bdpart_partition *p = pt + i; |
---|
| 637 | |
---|
| 638 | /* Write second partition entry */ |
---|
| 639 | if (i > ppc) { |
---|
| 640 | rtems_blkdev_bnum begin = p->begin - record_space; |
---|
| 641 | |
---|
| 642 | rtems_bdpart_write_mbr_partition( |
---|
| 643 | block->buffer + RTEMS_BDPART_MBR_OFFSET_TABLE_1, |
---|
| 644 | begin - ep_begin, |
---|
| 645 | disk_end - begin, |
---|
| 646 | RTEMS_BDPART_MBR_EXTENDED, |
---|
| 647 | 0 |
---|
| 648 | ); |
---|
| 649 | } |
---|
| 650 | |
---|
| 651 | /* New EBR */ |
---|
| 652 | ebr = p->begin - record_space; |
---|
| 653 | sc = rtems_bdpart_new_record( disk, ebr, &block); |
---|
| 654 | if (sc != RTEMS_SUCCESSFUL) { |
---|
| 655 | esc = sc; |
---|
| 656 | goto cleanup; |
---|
| 657 | } |
---|
| 658 | |
---|
| 659 | /* Write first partition entry */ |
---|
| 660 | rtems_bdpart_write_mbr_partition( |
---|
| 661 | block->buffer + RTEMS_BDPART_MBR_OFFSET_TABLE_0, |
---|
| 662 | record_space, |
---|
| 663 | p->end - p->begin, |
---|
| 664 | rtems_bdpart_mbr_partition_type( p->type), |
---|
| 665 | (uint8_t) p->flags |
---|
| 666 | ); |
---|
| 667 | } |
---|
| 668 | } |
---|
| 669 | |
---|
| 670 | cleanup: |
---|
| 671 | |
---|
| 672 | if (block != NULL) { |
---|
| 673 | rtems_bdbuf_sync( block); |
---|
| 674 | } |
---|
| 675 | |
---|
| 676 | return esc; |
---|
| 677 | } |
---|
| 678 | |
---|
| 679 | rtems_status_code rtems_bdpart_create( |
---|
| 680 | const char *disk_name, |
---|
| 681 | const rtems_bdpart_format *format, |
---|
| 682 | rtems_bdpart_partition *pt, |
---|
| 683 | const unsigned *dist, |
---|
| 684 | size_t count |
---|
| 685 | ) |
---|
| 686 | { |
---|
| 687 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
[4670d91] | 688 | bool dos_compatibility = format != NULL |
---|
| 689 | && format->type == RTEMS_BDPART_FORMAT_MBR |
---|
[834df50] | 690 | && format->mbr.dos_compatibility; |
---|
| 691 | rtems_blkdev_bnum disk_end = 0; |
---|
| 692 | rtems_blkdev_bnum pos = 0; |
---|
| 693 | rtems_blkdev_bnum dist_sum = 0; |
---|
| 694 | rtems_blkdev_bnum record_space = |
---|
| 695 | dos_compatibility ? RTEMS_BDPART_MBR_CYLINDER_SIZE : 1; |
---|
| 696 | rtems_blkdev_bnum overhead = 0; |
---|
| 697 | rtems_blkdev_bnum free_space = 0; |
---|
| 698 | dev_t disk = 0; |
---|
| 699 | size_t i = 0; |
---|
| 700 | |
---|
| 701 | /* Check if we have something to do */ |
---|
| 702 | if (count == 0) { |
---|
| 703 | /* Nothing to do */ |
---|
| 704 | return RTEMS_SUCCESSFUL; |
---|
| 705 | } |
---|
| 706 | |
---|
| 707 | /* Check parameter */ |
---|
| 708 | if (format == NULL || pt == NULL || dist == NULL) { |
---|
| 709 | return RTEMS_INVALID_ADDRESS; |
---|
| 710 | } |
---|
| 711 | |
---|
| 712 | /* Get disk data */ |
---|
| 713 | sc = rtems_bdpart_get_disk_data( disk_name, &disk, &disk_end); |
---|
| 714 | if (sc != RTEMS_SUCCESSFUL) { |
---|
| 715 | return sc; |
---|
| 716 | } |
---|
| 717 | |
---|
| 718 | /* Get distribution sum and check for overflow */ |
---|
| 719 | for (i = 0; i < count; ++i) { |
---|
| 720 | unsigned prev_sum = dist_sum; |
---|
| 721 | |
---|
| 722 | dist_sum += dist [i]; |
---|
| 723 | |
---|
| 724 | if (dist_sum < prev_sum) { |
---|
| 725 | return RTEMS_INVALID_NUMBER; |
---|
| 726 | } |
---|
| 727 | |
---|
| 728 | if (dist [i] == 0) { |
---|
| 729 | return RTEMS_INVALID_NUMBER; |
---|
| 730 | } |
---|
| 731 | } |
---|
| 732 | |
---|
| 733 | /* Check format */ |
---|
| 734 | if (format->type != RTEMS_BDPART_FORMAT_MBR) { |
---|
| 735 | return RTEMS_NOT_IMPLEMENTED; |
---|
| 736 | } |
---|
| 737 | |
---|
| 738 | /* Align end of disk on cylinder boundary if necessary */ |
---|
| 739 | if (dos_compatibility) { |
---|
| 740 | disk_end -= (disk_end % record_space); |
---|
| 741 | } |
---|
| 742 | |
---|
| 743 | /* |
---|
| 744 | * We need at least space for the MBR and the compatibility space for the |
---|
| 745 | * first primary partition. |
---|
| 746 | */ |
---|
| 747 | overhead += record_space; |
---|
| 748 | |
---|
| 749 | /* |
---|
| 750 | * In case we need an extended partition and logical partitions we have to |
---|
| 751 | * account for the space of each EBR. |
---|
| 752 | */ |
---|
| 753 | if (count > 4) { |
---|
| 754 | overhead += (count - 3) * record_space; |
---|
| 755 | } |
---|
| 756 | |
---|
| 757 | /* |
---|
| 758 | * Account space to align every partition on cylinder boundaries if |
---|
| 759 | * necessary. |
---|
| 760 | */ |
---|
| 761 | if (dos_compatibility) { |
---|
| 762 | overhead += (count - 1) * record_space; |
---|
| 763 | } |
---|
| 764 | |
---|
| 765 | /* Check disk space */ |
---|
| 766 | if ((overhead + count) > disk_end) { |
---|
| 767 | return RTEMS_IO_ERROR; |
---|
| 768 | } |
---|
| 769 | |
---|
| 770 | /* Begin of first primary partition */ |
---|
| 771 | pos = record_space; |
---|
| 772 | |
---|
| 773 | /* Space for partitions */ |
---|
| 774 | free_space = disk_end - overhead; |
---|
| 775 | |
---|
| 776 | for (i = 0; i < count; ++i) { |
---|
| 777 | rtems_bdpart_partition *p = pt + i; |
---|
| 778 | |
---|
| 779 | /* Partition size */ |
---|
| 780 | rtems_blkdev_bnum s = free_space * dist [i]; |
---|
| 781 | if (s < free_space || s < dist [i]) { |
---|
| 782 | /* TODO: Calculate without overflow */ |
---|
| 783 | return RTEMS_INVALID_NUMBER; |
---|
| 784 | } |
---|
| 785 | s /= dist_sum; |
---|
| 786 | |
---|
| 787 | /* Ensure that the partition is not empty */ |
---|
| 788 | if (s == 0) { |
---|
| 789 | s = 1; |
---|
| 790 | } |
---|
| 791 | |
---|
| 792 | /* Align partition upwards */ |
---|
| 793 | s += record_space - (s % record_space); |
---|
| 794 | |
---|
| 795 | /* Partition begin and end */ |
---|
| 796 | p->begin = pos; |
---|
| 797 | pos += s; |
---|
| 798 | p->end = pos; |
---|
| 799 | |
---|
| 800 | /* Reserve space for the EBR if necessary */ |
---|
| 801 | if (count > 4 && i > 2) { |
---|
| 802 | p->begin += record_space; |
---|
| 803 | } |
---|
| 804 | } |
---|
| 805 | |
---|
| 806 | /* Expand the last partition to the disk end */ |
---|
| 807 | pt [count - 1].end = disk_end; |
---|
| 808 | |
---|
| 809 | return RTEMS_SUCCESSFUL; |
---|
| 810 | } |
---|
| 811 | |
---|
| 812 | #define RTEMS_BDPART_NUMBER_SIZE 4 |
---|
| 813 | |
---|
| 814 | rtems_status_code rtems_bdpart_register( |
---|
| 815 | const char *disk_name, |
---|
| 816 | const rtems_bdpart_partition *pt, |
---|
| 817 | size_t count |
---|
| 818 | ) |
---|
| 819 | { |
---|
| 820 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 821 | rtems_status_code esc = RTEMS_SUCCESSFUL; |
---|
| 822 | rtems_device_major_number major = 0; |
---|
| 823 | rtems_device_minor_number minor = 0; |
---|
| 824 | rtems_blkdev_bnum disk_end = 0; |
---|
| 825 | dev_t disk = 0; |
---|
| 826 | dev_t logical_disk = 0; |
---|
| 827 | char *logical_disk_name = NULL; |
---|
| 828 | char *logical_disk_marker = NULL; |
---|
| 829 | size_t disk_name_size = strlen( disk_name); |
---|
| 830 | size_t i = 0; |
---|
| 831 | |
---|
| 832 | /* Get disk data */ |
---|
| 833 | sc = rtems_bdpart_get_disk_data( disk_name, &disk, &disk_end); |
---|
| 834 | if (sc != RTEMS_SUCCESSFUL) { |
---|
| 835 | return sc; |
---|
| 836 | } |
---|
| 837 | |
---|
| 838 | /* Get the disk device identifier */ |
---|
| 839 | rtems_filesystem_split_dev_t( disk, major, minor); |
---|
| 840 | |
---|
| 841 | /* Create logical disk name */ |
---|
| 842 | logical_disk_name = malloc( disk_name_size + RTEMS_BDPART_NUMBER_SIZE); |
---|
| 843 | if (logical_disk_name == NULL) { |
---|
| 844 | return RTEMS_NO_MEMORY; |
---|
| 845 | } |
---|
| 846 | strncpy( logical_disk_name, disk_name, disk_name_size); |
---|
| 847 | logical_disk_marker = logical_disk_name + disk_name_size; |
---|
| 848 | |
---|
| 849 | /* Create a logical disk for each partition */ |
---|
| 850 | for (i = 0; i < count; ++i) { |
---|
| 851 | const rtems_bdpart_partition *p = pt + i; |
---|
| 852 | int rv = 0; |
---|
| 853 | |
---|
| 854 | /* New minor number */ |
---|
| 855 | ++minor; |
---|
| 856 | |
---|
| 857 | /* Create a new device identifier */ |
---|
| 858 | logical_disk = rtems_filesystem_make_dev_t( major, minor); |
---|
| 859 | |
---|
| 860 | /* Set partition number for logical disk name */ |
---|
[199ccde] | 861 | rv = snprintf( logical_disk_marker, RTEMS_BDPART_NUMBER_SIZE, "%lu", i + 1); |
---|
[834df50] | 862 | if (rv >= RTEMS_BDPART_NUMBER_SIZE) { |
---|
| 863 | esc = RTEMS_INVALID_NAME; |
---|
| 864 | goto cleanup; |
---|
| 865 | } |
---|
| 866 | |
---|
| 867 | /* Create logical disk */ |
---|
| 868 | sc = rtems_disk_create_log( |
---|
| 869 | logical_disk, |
---|
| 870 | disk, |
---|
| 871 | p->begin, |
---|
| 872 | p->end - p->begin, |
---|
| 873 | logical_disk_name |
---|
| 874 | ); |
---|
| 875 | if (sc != RTEMS_SUCCESSFUL) { |
---|
| 876 | esc = sc; |
---|
| 877 | goto cleanup; |
---|
| 878 | } |
---|
| 879 | } |
---|
| 880 | |
---|
| 881 | cleanup: |
---|
| 882 | |
---|
| 883 | free( logical_disk_name); |
---|
| 884 | |
---|
| 885 | return esc; |
---|
| 886 | } |
---|
| 887 | |
---|
| 888 | rtems_status_code rtems_bdpart_register_from_disk( const char *disk_name) |
---|
| 889 | { |
---|
| 890 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 891 | rtems_bdpart_format format; |
---|
| 892 | rtems_bdpart_partition pt [RTEMS_BDPART_PARTITION_NUMBER_HINT]; |
---|
| 893 | size_t count = RTEMS_BDPART_PARTITION_NUMBER_HINT; |
---|
| 894 | |
---|
| 895 | /* Read partitions */ |
---|
| 896 | sc = rtems_bdpart_read( disk_name, &format, pt, &count); |
---|
| 897 | if (sc != RTEMS_SUCCESSFUL) { |
---|
| 898 | return sc; |
---|
| 899 | } |
---|
| 900 | |
---|
| 901 | /* Register partitions */ |
---|
| 902 | return rtems_bdpart_register( disk_name, pt, count); |
---|
| 903 | } |
---|
| 904 | |
---|
| 905 | rtems_status_code rtems_bdpart_unregister( |
---|
| 906 | const char *disk_name, |
---|
| 907 | const rtems_bdpart_partition *pt, |
---|
| 908 | size_t count |
---|
| 909 | ) |
---|
| 910 | { |
---|
| 911 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 912 | rtems_device_major_number major = 0; |
---|
| 913 | rtems_device_minor_number minor = 0; |
---|
| 914 | rtems_blkdev_bnum disk_end = 0; |
---|
| 915 | dev_t disk = 0; |
---|
| 916 | dev_t logical_disk = 0; |
---|
| 917 | size_t i = 0; |
---|
| 918 | |
---|
| 919 | /* Get disk data */ |
---|
| 920 | sc = rtems_bdpart_get_disk_data( disk_name, &disk, &disk_end); |
---|
| 921 | if (sc != RTEMS_SUCCESSFUL) { |
---|
| 922 | return sc; |
---|
| 923 | } |
---|
| 924 | |
---|
| 925 | /* Get the disk device identifier */ |
---|
| 926 | rtems_filesystem_split_dev_t( disk, major, minor); |
---|
| 927 | |
---|
| 928 | /* Create a logical disk for each partition */ |
---|
| 929 | for (i = 0; i < count; ++i) { |
---|
| 930 | /* New minor number */ |
---|
| 931 | ++minor; |
---|
| 932 | |
---|
| 933 | /* Get the device identifier */ |
---|
| 934 | logical_disk = rtems_filesystem_make_dev_t( major, minor); |
---|
| 935 | |
---|
| 936 | /* Delete logical disk */ |
---|
| 937 | sc = rtems_disk_delete( logical_disk); |
---|
| 938 | if (sc != RTEMS_SUCCESSFUL) { |
---|
| 939 | return sc; |
---|
| 940 | } |
---|
| 941 | } |
---|
| 942 | |
---|
| 943 | return RTEMS_SUCCESSFUL; |
---|
| 944 | } |
---|
| 945 | |
---|
| 946 | rtems_status_code rtems_bdpart_mount( |
---|
| 947 | const char *disk_name, |
---|
| 948 | const rtems_bdpart_partition *pt, |
---|
| 949 | size_t count, |
---|
| 950 | const char *mount_base |
---|
| 951 | ) |
---|
| 952 | { |
---|
| 953 | rtems_status_code esc = RTEMS_SUCCESSFUL; |
---|
| 954 | const char *disk_file_name = strrchr( disk_name, '/'); |
---|
| 955 | char *logical_disk_name = NULL; |
---|
| 956 | char *logical_disk_marker = NULL; |
---|
| 957 | char *mount_point = NULL; |
---|
| 958 | char *mount_marker = NULL; |
---|
| 959 | size_t disk_file_name_size = 0; |
---|
| 960 | size_t disk_name_size = strlen( disk_name); |
---|
| 961 | size_t mount_base_size = strlen( mount_base); |
---|
| 962 | size_t i = 0; |
---|
| 963 | |
---|
| 964 | /* Create logical disk name base */ |
---|
| 965 | logical_disk_name = malloc( disk_name_size + RTEMS_BDPART_NUMBER_SIZE); |
---|
| 966 | if (logical_disk_name == NULL) { |
---|
| 967 | return RTEMS_NO_MEMORY; |
---|
| 968 | } |
---|
| 969 | strncpy( logical_disk_name, disk_name, disk_name_size); |
---|
| 970 | |
---|
| 971 | /* Get disk file name */ |
---|
| 972 | if (disk_file_name != NULL) { |
---|
| 973 | disk_file_name += 1; |
---|
| 974 | disk_file_name_size = strlen( disk_file_name); |
---|
| 975 | } else { |
---|
| 976 | disk_file_name = disk_name; |
---|
| 977 | disk_file_name_size = disk_name_size; |
---|
| 978 | } |
---|
| 979 | |
---|
| 980 | /* Create mount point base */ |
---|
| 981 | mount_point = malloc( mount_base_size + 1 + disk_file_name_size + RTEMS_BDPART_NUMBER_SIZE); |
---|
| 982 | if (mount_point == NULL) { |
---|
| 983 | esc = RTEMS_NO_MEMORY; |
---|
| 984 | goto cleanup; |
---|
| 985 | } |
---|
| 986 | strncpy( mount_point, mount_base, mount_base_size); |
---|
| 987 | mount_point [mount_base_size] = '/'; |
---|
| 988 | strncpy( mount_point + mount_base_size + 1, disk_file_name, disk_file_name_size); |
---|
| 989 | |
---|
| 990 | /* Markers */ |
---|
| 991 | logical_disk_marker = logical_disk_name + disk_name_size; |
---|
| 992 | mount_marker = mount_point + mount_base_size + 1 + disk_file_name_size; |
---|
| 993 | |
---|
| 994 | /* Mount supported file systems for each partition */ |
---|
| 995 | for (i = 0; i < count; ++i) { |
---|
| 996 | /* Create logical disk name */ |
---|
[199ccde] | 997 | int rv = snprintf( logical_disk_marker, RTEMS_BDPART_NUMBER_SIZE, "%lu", i + 1); |
---|
[834df50] | 998 | if (rv >= RTEMS_BDPART_NUMBER_SIZE) { |
---|
| 999 | esc = RTEMS_INVALID_NAME; |
---|
| 1000 | goto cleanup; |
---|
| 1001 | } |
---|
| 1002 | |
---|
| 1003 | /* Create mount point */ |
---|
| 1004 | strncpy( mount_marker, logical_disk_marker, RTEMS_BDPART_NUMBER_SIZE); |
---|
| 1005 | rv = rtems_fsmount_create_mount_point( mount_point); |
---|
| 1006 | if (rv != 0) { |
---|
| 1007 | esc = RTEMS_IO_ERROR; |
---|
| 1008 | goto cleanup; |
---|
| 1009 | } |
---|
| 1010 | |
---|
| 1011 | /* Mount */ |
---|
| 1012 | rv = mount( |
---|
| 1013 | NULL, |
---|
| 1014 | &msdos_ops, |
---|
| 1015 | 0, |
---|
| 1016 | logical_disk_name, |
---|
| 1017 | mount_point |
---|
| 1018 | ); |
---|
| 1019 | if (rv != 0) { |
---|
| 1020 | rmdir( mount_point); |
---|
| 1021 | } |
---|
| 1022 | } |
---|
| 1023 | |
---|
| 1024 | cleanup: |
---|
| 1025 | |
---|
| 1026 | free( logical_disk_name); |
---|
| 1027 | free( mount_point); |
---|
| 1028 | |
---|
| 1029 | return esc; |
---|
| 1030 | } |
---|
| 1031 | |
---|
| 1032 | rtems_status_code rtems_bdpart_unmount( |
---|
| 1033 | const char *disk_name, |
---|
| 1034 | const rtems_bdpart_partition *pt, |
---|
| 1035 | size_t count, |
---|
| 1036 | const char *mount_base |
---|
| 1037 | ) |
---|
| 1038 | { |
---|
| 1039 | rtems_status_code esc = RTEMS_SUCCESSFUL; |
---|
| 1040 | const char *disk_file_name = strrchr( disk_name, '/'); |
---|
| 1041 | char *mount_point = NULL; |
---|
| 1042 | char *mount_marker = NULL; |
---|
| 1043 | size_t disk_file_name_size = 0; |
---|
| 1044 | size_t disk_name_size = strlen( disk_name); |
---|
| 1045 | size_t mount_base_size = strlen( mount_base); |
---|
| 1046 | size_t i = 0; |
---|
| 1047 | |
---|
| 1048 | /* Get disk file name */ |
---|
| 1049 | if (disk_file_name != NULL) { |
---|
| 1050 | disk_file_name += 1; |
---|
| 1051 | disk_file_name_size = strlen( disk_file_name); |
---|
| 1052 | } else { |
---|
| 1053 | disk_file_name = disk_name; |
---|
| 1054 | disk_file_name_size = disk_name_size; |
---|
| 1055 | } |
---|
| 1056 | |
---|
| 1057 | /* Create mount point base */ |
---|
| 1058 | mount_point = malloc( mount_base_size + 1 + disk_file_name_size + RTEMS_BDPART_NUMBER_SIZE); |
---|
| 1059 | if (mount_point == NULL) { |
---|
| 1060 | esc = RTEMS_NO_MEMORY; |
---|
| 1061 | goto cleanup; |
---|
| 1062 | } |
---|
| 1063 | strncpy( mount_point, mount_base, mount_base_size); |
---|
| 1064 | mount_point [mount_base_size] = '/'; |
---|
| 1065 | strncpy( mount_point + mount_base_size + 1, disk_file_name, disk_file_name_size); |
---|
| 1066 | |
---|
| 1067 | /* Marker */ |
---|
| 1068 | mount_marker = mount_point + mount_base_size + 1 + disk_file_name_size; |
---|
| 1069 | |
---|
| 1070 | /* Mount supported file systems for each partition */ |
---|
| 1071 | for (i = 0; i < count; ++i) { |
---|
| 1072 | /* Create mount point */ |
---|
[199ccde] | 1073 | int rv = snprintf( mount_marker, RTEMS_BDPART_NUMBER_SIZE, "%lu", i + 1); |
---|
[834df50] | 1074 | if (rv >= RTEMS_BDPART_NUMBER_SIZE) { |
---|
| 1075 | esc = RTEMS_INVALID_NAME; |
---|
| 1076 | goto cleanup; |
---|
| 1077 | } |
---|
| 1078 | |
---|
| 1079 | /* Unmount */ |
---|
| 1080 | rv = unmount( mount_point); |
---|
| 1081 | if (rv == 0) { |
---|
| 1082 | /* Remove mount point */ |
---|
| 1083 | rv = rmdir( mount_point); |
---|
| 1084 | if (rv != 0) { |
---|
| 1085 | esc = RTEMS_IO_ERROR; |
---|
| 1086 | goto cleanup; |
---|
| 1087 | } |
---|
| 1088 | } |
---|
| 1089 | } |
---|
| 1090 | |
---|
| 1091 | cleanup: |
---|
| 1092 | |
---|
| 1093 | free( mount_point); |
---|
| 1094 | |
---|
| 1095 | return esc; |
---|
| 1096 | } |
---|
| 1097 | |
---|
| 1098 | void rtems_bdpart_dump( const rtems_bdpart_partition *pt, size_t count) |
---|
| 1099 | { |
---|
| 1100 | size_t i = 0; |
---|
| 1101 | |
---|
| 1102 | printf( |
---|
| 1103 | "-------------------------------------------------------------------------------\n" |
---|
| 1104 | " PARTITION TABLE\n" |
---|
| 1105 | "------------+------------+-----------------------------------------------------\n" |
---|
| 1106 | " BEGIN | END | TYPE\n" |
---|
| 1107 | "------------+------------+-----------------------------------------------------\n" |
---|
| 1108 | ); |
---|
| 1109 | |
---|
| 1110 | for (i = 0; i < count; ++i) { |
---|
| 1111 | const rtems_bdpart_partition *p = pt + i; |
---|
| 1112 | const char *type = NULL; |
---|
| 1113 | char type_buffer [52]; |
---|
| 1114 | uint8_t type_mbr = 0; |
---|
| 1115 | |
---|
| 1116 | if (rtems_bdpart_to_mbr_partition_type( p->type, &type_mbr)) { |
---|
| 1117 | switch (type_mbr) { |
---|
| 1118 | case RTEMS_BDPART_MBR_FAT_12: |
---|
| 1119 | type = "FAT 12"; |
---|
| 1120 | break; |
---|
| 1121 | case RTEMS_BDPART_MBR_FAT_16: |
---|
| 1122 | type = "FAT 16"; |
---|
| 1123 | break; |
---|
| 1124 | case RTEMS_BDPART_MBR_FAT_16_LBA: |
---|
| 1125 | type = "FAT 16 LBA"; |
---|
| 1126 | break; |
---|
| 1127 | case RTEMS_BDPART_MBR_FAT_32: |
---|
| 1128 | type = "FAT 32"; |
---|
| 1129 | break; |
---|
| 1130 | case RTEMS_BDPART_MBR_FAT_32_LBA: |
---|
| 1131 | type = "FAT 32 LBA"; |
---|
| 1132 | break; |
---|
| 1133 | case RTEMS_BDPART_MBR_DATA: |
---|
| 1134 | type = "DATA"; |
---|
| 1135 | break; |
---|
| 1136 | default: |
---|
| 1137 | snprintf( type_buffer, sizeof( type_buffer), "0x%02" PRIx8, type_mbr); |
---|
| 1138 | type = type_buffer; |
---|
| 1139 | break; |
---|
| 1140 | } |
---|
| 1141 | } else { |
---|
| 1142 | rtems_bdpart_type_to_string( p->type, type_buffer); |
---|
| 1143 | type = type_buffer; |
---|
| 1144 | } |
---|
| 1145 | |
---|
| 1146 | printf( |
---|
| 1147 | " %10lu | %10lu |%52s\n", |
---|
| 1148 | (unsigned long) p->begin, |
---|
| 1149 | (unsigned long) p->end, |
---|
| 1150 | type |
---|
| 1151 | ); |
---|
| 1152 | } |
---|
| 1153 | |
---|
| 1154 | puts( "------------+------------+-----------------------------------------------------"); |
---|
| 1155 | } |
---|