[57aa979] | 1 | /** |
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| 2 | * @file |
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| 3 | * |
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[4670d91] | 4 | * @ingroup rtems_disk |
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| 5 | * |
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[e41369ef] | 6 | * @brief Block device disk management implementation. |
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[57aa979] | 7 | */ |
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[18daff9] | 8 | |
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[8b96149] | 9 | /* |
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[e51bd96] | 10 | * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia |
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| 11 | * Author: Victor V. Vengerov <vvv@oktet.ru> |
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| 12 | * |
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[1b2da177] | 13 | * Copyright (c) 2009, 2017 embedded brains GmbH. |
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[e51bd96] | 14 | */ |
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| 15 | |
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[006fa1ef] | 16 | #if HAVE_CONFIG_H |
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| 17 | #include "config.h" |
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| 18 | #endif |
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[e51bd96] | 19 | |
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| 20 | #include <stdlib.h> |
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[e41369ef] | 21 | #include <unistd.h> |
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[e51bd96] | 22 | #include <string.h> |
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| 23 | |
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[e41369ef] | 24 | #include <rtems.h> |
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| 25 | #include <rtems/libio.h> |
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| 26 | #include <rtems/diskdevs.h> |
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| 27 | #include <rtems/blkdev.h> |
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| 28 | #include <rtems/bdbuf.h> |
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[1b2da177] | 29 | #include <rtems/thread.h> |
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[e51bd96] | 30 | |
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[0b038bd4] | 31 | #pragma GCC diagnostic ignored "-Wdeprecated-declarations" |
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| 32 | |
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[e41369ef] | 33 | #define DISKTAB_INITIAL_SIZE 8 |
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[e51bd96] | 34 | |
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| 35 | /* Table of disk devices having the same major number */ |
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[3899a537] | 36 | typedef struct rtems_disk_device_table { |
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[e41369ef] | 37 | rtems_disk_device **minor; /* minor-indexed disk device table */ |
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| 38 | rtems_device_minor_number size; /* Number of entries in the table */ |
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[3899a537] | 39 | } rtems_disk_device_table; |
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[e51bd96] | 40 | |
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| 41 | /* Pointer to [major].minor[minor] indexed array of disk devices */ |
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[3899a537] | 42 | static rtems_disk_device_table *disktab; |
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[e51bd96] | 43 | |
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| 44 | /* Number of allocated entries in disktab table */ |
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[e41369ef] | 45 | static rtems_device_major_number disktab_size; |
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[e51bd96] | 46 | |
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| 47 | /* Mutual exclusion semaphore for disk devices table */ |
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[1b2da177] | 48 | static rtems_mutex diskdevs_mutex = RTEMS_MUTEX_INITIALIZER("diskdevs"); |
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[e51bd96] | 49 | |
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| 50 | /* diskdevs data structures protection flag. |
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| 51 | * Normally, only table lookup operations performed. It is quite fast, so |
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| 52 | * it is possible to done lookups when interrupts are disabled, avoiding |
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| 53 | * obtaining the semaphore. This flags sets immediately after entering in |
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| 54 | * mutex-protected section and cleared before leaving this section in |
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| 55 | * "big" primitives like add/delete new device etc. Lookup function first |
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| 56 | * disable interrupts and check this flag. If it is set, lookup function |
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| 57 | * will be blocked on semaphore and lookup operation will be performed in |
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| 58 | * semaphore-protected code. If it is not set (very-very frequent case), |
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| 59 | * we can do lookup safely, enable interrupts and return result. |
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| 60 | */ |
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[e03c37a] | 61 | static volatile bool diskdevs_protected; |
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[e51bd96] | 62 | |
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[5d428576] | 63 | RTEMS_INTERRUPT_LOCK_DEFINE(static, diskdevs_lock, "diskdevs") |
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[9de9b7d2] | 64 | |
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[1b2da177] | 65 | static rtems_status_code disk_delete_locked(dev_t dev); |
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| 66 | |
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| 67 | static void |
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[e41369ef] | 68 | disk_lock(void) |
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[e51bd96] | 69 | { |
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[1b2da177] | 70 | rtems_mutex_lock(&diskdevs_mutex); |
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| 71 | diskdevs_protected = true; |
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[e41369ef] | 72 | } |
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[048dcd2b] | 73 | |
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[e41369ef] | 74 | static void |
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| 75 | disk_unlock(void) |
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| 76 | { |
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| 77 | diskdevs_protected = false; |
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[1b2da177] | 78 | rtems_mutex_unlock(&diskdevs_mutex); |
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[e51bd96] | 79 | } |
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| 80 | |
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[3899a537] | 81 | static rtems_disk_device * |
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[bdac0eed] | 82 | get_disk_entry(dev_t dev, bool lookup_only) |
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[e51bd96] | 83 | { |
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[e41369ef] | 84 | rtems_device_major_number major = 0; |
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| 85 | rtems_device_minor_number minor = 0; |
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[e51bd96] | 86 | |
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[e41369ef] | 87 | rtems_filesystem_split_dev_t(dev, major, minor); |
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[048dcd2b] | 88 | |
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[e41369ef] | 89 | if (major < disktab_size && disktab != NULL) { |
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| 90 | rtems_disk_device_table *dtab = disktab + major; |
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[048dcd2b] | 91 | |
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[e41369ef] | 92 | if (minor < dtab->size && dtab->minor != NULL) { |
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| 93 | rtems_disk_device *dd = dtab->minor [minor]; |
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[048dcd2b] | 94 | |
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[bdac0eed] | 95 | if (dd != NULL && !lookup_only) { |
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| 96 | if (!dd->deleted) { |
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| 97 | ++dd->uses; |
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| 98 | } else { |
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| 99 | dd = NULL; |
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| 100 | } |
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[e41369ef] | 101 | } |
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[bdac0eed] | 102 | |
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| 103 | return dd; |
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[e41369ef] | 104 | } |
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| 105 | } |
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| 106 | |
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| 107 | return NULL; |
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[e51bd96] | 108 | } |
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| 109 | |
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[e41369ef] | 110 | static rtems_disk_device ** |
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| 111 | create_disk_table_entry(dev_t dev) |
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[e51bd96] | 112 | { |
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[e41369ef] | 113 | rtems_device_major_number major = 0; |
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| 114 | rtems_device_minor_number minor = 0; |
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[048dcd2b] | 115 | |
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[e41369ef] | 116 | rtems_filesystem_split_dev_t(dev, major, minor); |
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| 117 | |
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| 118 | if (major >= disktab_size) { |
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| 119 | rtems_disk_device_table *table = disktab; |
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| 120 | rtems_device_major_number old_size = disktab_size; |
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| 121 | rtems_device_major_number new_size = 2 * old_size; |
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| 122 | |
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| 123 | if (major >= new_size) { |
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| 124 | new_size = major + 1; |
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[e51bd96] | 125 | } |
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[048dcd2b] | 126 | |
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[e41369ef] | 127 | table = realloc(table, new_size * sizeof(*table)); |
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| 128 | if (table == NULL) { |
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| 129 | return NULL; |
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[e51bd96] | 130 | } |
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[e41369ef] | 131 | |
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| 132 | memset(table + old_size, 0, (new_size - old_size) * sizeof(*table)); |
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| 133 | disktab = table; |
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| 134 | disktab_size = new_size; |
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| 135 | } |
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| 136 | |
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| 137 | if (disktab [major].minor == NULL || minor >= disktab[major].size) { |
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| 138 | rtems_disk_device **table = disktab [major].minor; |
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| 139 | rtems_device_minor_number old_size = disktab [major].size; |
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| 140 | rtems_device_minor_number new_size = 0; |
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| 141 | |
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| 142 | if (old_size == 0) { |
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| 143 | new_size = DISKTAB_INITIAL_SIZE; |
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| 144 | } else { |
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| 145 | new_size = 2 * old_size; |
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| 146 | } |
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| 147 | if (minor >= new_size) { |
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| 148 | new_size = minor + 1; |
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[e51bd96] | 149 | } |
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[048dcd2b] | 150 | |
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[e41369ef] | 151 | table = realloc(table, new_size * sizeof(*table)); |
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| 152 | if (table == NULL) { |
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| 153 | return NULL; |
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[e51bd96] | 154 | } |
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[048dcd2b] | 155 | |
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[e41369ef] | 156 | memset(table + old_size, 0, (new_size - old_size) * sizeof(*table)); |
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| 157 | disktab [major].minor = table; |
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| 158 | disktab [major].size = new_size; |
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| 159 | } |
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[048dcd2b] | 160 | |
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[e41369ef] | 161 | return disktab [major].minor + minor; |
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| 162 | } |
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[048dcd2b] | 163 | |
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[e41369ef] | 164 | static rtems_status_code |
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[73c09b3b] | 165 | create_disk( |
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| 166 | dev_t dev, |
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| 167 | const char *name, |
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| 168 | rtems_disk_device **dd_ptr, |
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| 169 | char **alloc_name_ptr |
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| 170 | ) |
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[e41369ef] | 171 | { |
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| 172 | rtems_disk_device **dd_entry = create_disk_table_entry(dev); |
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| 173 | rtems_disk_device *dd = NULL; |
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| 174 | char *alloc_name = NULL; |
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| 175 | |
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| 176 | if (dd_entry == NULL) { |
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| 177 | return RTEMS_NO_MEMORY; |
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| 178 | } |
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| 179 | |
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| 180 | if (*dd_entry != NULL) { |
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| 181 | return RTEMS_RESOURCE_IN_USE; |
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| 182 | } |
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| 183 | |
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| 184 | dd = malloc(sizeof(*dd)); |
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| 185 | if (dd == NULL) { |
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| 186 | return RTEMS_NO_MEMORY; |
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| 187 | } |
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| 188 | |
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| 189 | if (name != NULL) { |
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| 190 | alloc_name = strdup(name); |
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[18daff9] | 191 | |
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[e41369ef] | 192 | if (alloc_name == NULL) { |
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| 193 | free(dd); |
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| 194 | |
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| 195 | return RTEMS_NO_MEMORY; |
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| 196 | } |
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| 197 | } |
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| 198 | |
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| 199 | if (name != NULL) { |
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[cca94a2] | 200 | if (mknod(alloc_name, 0777 | S_IFBLK, dev) < 0) { |
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[e41369ef] | 201 | free(alloc_name); |
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| 202 | free(dd); |
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| 203 | return RTEMS_UNSATISFIED; |
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| 204 | } |
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| 205 | } |
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| 206 | |
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| 207 | *dd_entry = dd; |
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| 208 | *dd_ptr = dd; |
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[73c09b3b] | 209 | *alloc_name_ptr = alloc_name; |
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[e41369ef] | 210 | |
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| 211 | return RTEMS_SUCCESSFUL; |
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[e51bd96] | 212 | } |
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| 213 | |
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[b467782b] | 214 | static int null_handler( |
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| 215 | rtems_disk_device *dd, |
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| 216 | uint32_t req, |
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| 217 | void *argp |
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| 218 | ) |
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| 219 | { |
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| 220 | return -1; |
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| 221 | } |
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| 222 | |
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[57aa979] | 223 | rtems_status_code rtems_disk_create_phys( |
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| 224 | dev_t dev, |
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| 225 | uint32_t block_size, |
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[e41369ef] | 226 | rtems_blkdev_bnum block_count, |
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[57aa979] | 227 | rtems_block_device_ioctl handler, |
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[b96e09c] | 228 | void *driver_data, |
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[57aa979] | 229 | const char *name |
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| 230 | ) |
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[e51bd96] | 231 | { |
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[e41369ef] | 232 | rtems_disk_device *dd = NULL; |
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| 233 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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[73c09b3b] | 234 | char *alloc_name = NULL; |
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[e51bd96] | 235 | |
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[e41369ef] | 236 | if (handler == NULL) { |
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| 237 | return RTEMS_INVALID_ADDRESS; |
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| 238 | } |
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[e51bd96] | 239 | |
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[1b2da177] | 240 | disk_lock(); |
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[048dcd2b] | 241 | |
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[73c09b3b] | 242 | sc = create_disk(dev, name, &dd, &alloc_name); |
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[e41369ef] | 243 | if (sc != RTEMS_SUCCESSFUL) { |
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| 244 | disk_unlock(); |
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[e51bd96] | 245 | |
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[e41369ef] | 246 | return sc; |
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| 247 | } |
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[048dcd2b] | 248 | |
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[73c09b3b] | 249 | sc = rtems_disk_init_phys( |
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| 250 | dd, |
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| 251 | block_size, |
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| 252 | block_count, |
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| 253 | handler, |
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| 254 | driver_data |
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| 255 | ); |
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[e41369ef] | 256 | |
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[73c09b3b] | 257 | dd->dev = dev; |
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| 258 | dd->name = alloc_name; |
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[18daff9] | 259 | |
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[b467782b] | 260 | if (sc != RTEMS_SUCCESSFUL) { |
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| 261 | dd->ioctl = null_handler; |
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[1b2da177] | 262 | disk_delete_locked(dev); |
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[b467782b] | 263 | disk_unlock(); |
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| 264 | |
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| 265 | return sc; |
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| 266 | } |
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| 267 | |
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[e41369ef] | 268 | disk_unlock(); |
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[e51bd96] | 269 | |
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[e41369ef] | 270 | return RTEMS_SUCCESSFUL; |
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| 271 | } |
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| 272 | |
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| 273 | static bool |
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| 274 | is_physical_disk(const rtems_disk_device *dd) |
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| 275 | { |
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| 276 | return dd->phys_dev == dd; |
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[e51bd96] | 277 | } |
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| 278 | |
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[57aa979] | 279 | rtems_status_code rtems_disk_create_log( |
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| 280 | dev_t dev, |
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| 281 | dev_t phys, |
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[73c09b3b] | 282 | rtems_blkdev_bnum block_begin, |
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[e41369ef] | 283 | rtems_blkdev_bnum block_count, |
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[57aa979] | 284 | const char *name |
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| 285 | ) |
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[e51bd96] | 286 | { |
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[e41369ef] | 287 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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[73c09b3b] | 288 | rtems_disk_device *phys_dd = NULL; |
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[57aa979] | 289 | rtems_disk_device *dd = NULL; |
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[73c09b3b] | 290 | char *alloc_name = NULL; |
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[e51bd96] | 291 | |
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[1b2da177] | 292 | disk_lock(); |
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[57aa979] | 293 | |
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[73c09b3b] | 294 | phys_dd = get_disk_entry(phys, true); |
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| 295 | if (phys_dd == NULL) { |
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[e41369ef] | 296 | disk_unlock(); |
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| 297 | |
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| 298 | return RTEMS_INVALID_ID; |
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| 299 | } |
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[57aa979] | 300 | |
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[73c09b3b] | 301 | sc = create_disk(dev, name, &dd, &alloc_name); |
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| 302 | if (sc != RTEMS_SUCCESSFUL) { |
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[e41369ef] | 303 | disk_unlock(); |
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| 304 | |
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[73c09b3b] | 305 | return sc; |
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[57aa979] | 306 | } |
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[048dcd2b] | 307 | |
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[73c09b3b] | 308 | sc = rtems_disk_init_log( |
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| 309 | dd, |
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| 310 | phys_dd, |
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| 311 | block_begin, |
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| 312 | block_count |
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| 313 | ); |
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| 314 | |
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| 315 | dd->dev = dev; |
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| 316 | dd->name = alloc_name; |
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| 317 | |
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| 318 | ++phys_dd->uses; |
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| 319 | |
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[e41369ef] | 320 | if (sc != RTEMS_SUCCESSFUL) { |
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[73c09b3b] | 321 | dd->ioctl = null_handler; |
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[1b2da177] | 322 | disk_delete_locked(dev); |
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[e41369ef] | 323 | disk_unlock(); |
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| 324 | |
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| 325 | return sc; |
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[57aa979] | 326 | } |
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[048dcd2b] | 327 | |
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[e41369ef] | 328 | disk_unlock(); |
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[e51bd96] | 329 | |
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[e41369ef] | 330 | return RTEMS_SUCCESSFUL; |
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| 331 | } |
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[048dcd2b] | 332 | |
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[e41369ef] | 333 | static void |
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| 334 | free_disk_device(rtems_disk_device *dd) |
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| 335 | { |
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| 336 | if (is_physical_disk(dd)) { |
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| 337 | (*dd->ioctl)(dd, RTEMS_BLKIO_DELETED, NULL); |
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| 338 | } |
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| 339 | if (dd->name != NULL) { |
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| 340 | unlink(dd->name); |
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| 341 | free(dd->name); |
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| 342 | } |
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| 343 | free(dd); |
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| 344 | } |
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| 345 | |
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| 346 | static void |
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| 347 | rtems_disk_cleanup(rtems_disk_device *disk_to_remove) |
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| 348 | { |
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| 349 | rtems_disk_device *const physical_disk = disk_to_remove->phys_dev; |
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| 350 | rtems_device_major_number major = 0; |
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| 351 | rtems_device_minor_number minor = 0; |
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| 352 | |
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| 353 | if (physical_disk->deleted) { |
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| 354 | dev_t dev = physical_disk->dev; |
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| 355 | unsigned deleted_count = 0; |
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| 356 | |
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| 357 | for (major = 0; major < disktab_size; ++major) { |
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| 358 | rtems_disk_device_table *dtab = disktab + major; |
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| 359 | |
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| 360 | for (minor = 0; minor < dtab->size; ++minor) { |
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| 361 | rtems_disk_device *dd = dtab->minor [minor]; |
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| 362 | |
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| 363 | if (dd != NULL && dd->phys_dev->dev == dev && dd != physical_disk) { |
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| 364 | if (dd->uses == 0) { |
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| 365 | ++deleted_count; |
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| 366 | dtab->minor [minor] = NULL; |
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| 367 | free_disk_device(dd); |
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| 368 | } else { |
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| 369 | dd->deleted = true; |
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| 370 | } |
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| 371 | } |
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| 372 | } |
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| 373 | } |
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| 374 | |
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| 375 | physical_disk->uses -= deleted_count; |
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| 376 | if (physical_disk->uses == 0) { |
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| 377 | rtems_filesystem_split_dev_t(physical_disk->dev, major, minor); |
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| 378 | disktab [major].minor [minor] = NULL; |
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| 379 | free_disk_device(physical_disk); |
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| 380 | } |
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| 381 | } else { |
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| 382 | if (disk_to_remove->uses == 0) { |
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| 383 | --physical_disk->uses; |
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| 384 | rtems_filesystem_split_dev_t(disk_to_remove->dev, major, minor); |
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| 385 | disktab [major].minor [minor] = NULL; |
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| 386 | free_disk_device(disk_to_remove); |
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| 387 | } |
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| 388 | } |
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[e51bd96] | 389 | } |
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| 390 | |
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[1b2da177] | 391 | static rtems_status_code |
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| 392 | disk_delete_locked(dev_t dev) |
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[e51bd96] | 393 | { |
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[57aa979] | 394 | rtems_disk_device *dd = NULL; |
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| 395 | |
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[bdac0eed] | 396 | dd = get_disk_entry(dev, true); |
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[57aa979] | 397 | if (dd == NULL) { |
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[e41369ef] | 398 | return RTEMS_INVALID_ID; |
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[57aa979] | 399 | } |
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[048dcd2b] | 400 | |
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[e41369ef] | 401 | dd->deleted = true; |
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| 402 | rtems_disk_cleanup(dd); |
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[e51bd96] | 403 | |
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[1b2da177] | 404 | return RTEMS_SUCCESSFUL; |
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| 405 | } |
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| 406 | |
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| 407 | rtems_status_code |
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| 408 | rtems_disk_delete(dev_t dev) |
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| 409 | { |
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| 410 | rtems_status_code sc; |
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| 411 | |
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| 412 | disk_lock(); |
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| 413 | sc = disk_delete_locked(dev); |
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[e41369ef] | 414 | disk_unlock(); |
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[57aa979] | 415 | |
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[1b2da177] | 416 | return sc; |
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[e51bd96] | 417 | } |
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| 418 | |
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[3899a537] | 419 | rtems_disk_device * |
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| 420 | rtems_disk_obtain(dev_t dev) |
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[e51bd96] | 421 | { |
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[e41369ef] | 422 | rtems_disk_device *dd = NULL; |
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[d50acdbb] | 423 | rtems_interrupt_lock_context lock_context; |
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[048dcd2b] | 424 | |
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[d50acdbb] | 425 | rtems_interrupt_lock_acquire(&diskdevs_lock, &lock_context); |
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[e41369ef] | 426 | if (!diskdevs_protected) { |
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| 427 | /* Frequent and quickest case */ |
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[bdac0eed] | 428 | dd = get_disk_entry(dev, false); |
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[d50acdbb] | 429 | rtems_interrupt_lock_release(&diskdevs_lock, &lock_context); |
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[e41369ef] | 430 | } else { |
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[d50acdbb] | 431 | rtems_interrupt_lock_release(&diskdevs_lock, &lock_context); |
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[e41369ef] | 432 | |
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[1b2da177] | 433 | disk_lock(); |
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| 434 | dd = get_disk_entry(dev, false); |
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| 435 | disk_unlock(); |
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[e41369ef] | 436 | } |
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| 437 | |
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| 438 | return dd; |
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[e51bd96] | 439 | } |
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| 440 | |
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| 441 | rtems_status_code |
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[3899a537] | 442 | rtems_disk_release(rtems_disk_device *dd) |
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[e51bd96] | 443 | { |
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[d50acdbb] | 444 | rtems_interrupt_lock_context lock_context; |
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[e41369ef] | 445 | dev_t dev = dd->dev; |
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| 446 | unsigned uses = 0; |
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| 447 | bool deleted = false; |
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| 448 | |
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[d50acdbb] | 449 | rtems_interrupt_lock_acquire(&diskdevs_lock, &lock_context); |
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[e41369ef] | 450 | uses = --dd->uses; |
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| 451 | deleted = dd->deleted; |
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[d50acdbb] | 452 | rtems_interrupt_lock_release(&diskdevs_lock, &lock_context); |
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[e41369ef] | 453 | |
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| 454 | if (uses == 0 && deleted) { |
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| 455 | rtems_disk_delete(dev); |
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| 456 | } |
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| 457 | |
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| 458 | return RTEMS_SUCCESSFUL; |
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[e51bd96] | 459 | } |
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| 460 | |
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[3899a537] | 461 | rtems_disk_device * |
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[e51bd96] | 462 | rtems_disk_next(dev_t dev) |
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| 463 | { |
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[c8522fd] | 464 | rtems_disk_device_table *dtab = NULL; |
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| 465 | rtems_device_major_number major = 0; |
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| 466 | rtems_device_minor_number minor = 0; |
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[e51bd96] | 467 | |
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[c8522fd] | 468 | if (dev != (dev_t) -1) { |
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| 469 | rtems_filesystem_split_dev_t(dev, major, minor); |
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[e51bd96] | 470 | |
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[c8522fd] | 471 | /* If minor wraps around */ |
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| 472 | if ((minor + 1) < minor) { |
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| 473 | /* If major wraps around */ |
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| 474 | if ((major + 1) < major) { |
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[e51bd96] | 475 | return NULL; |
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[c8522fd] | 476 | } |
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| 477 | ++major; |
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| 478 | minor = 0; |
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| 479 | } else { |
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| 480 | ++minor; |
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| 481 | } |
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| 482 | } |
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[048dcd2b] | 483 | |
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[1b2da177] | 484 | disk_lock(); |
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[c8522fd] | 485 | |
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| 486 | if (major >= disktab_size) { |
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| 487 | disk_unlock(); |
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| 488 | |
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| 489 | return NULL; |
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| 490 | } |
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| 491 | |
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| 492 | dtab = disktab + major; |
---|
| 493 | while (true) { |
---|
| 494 | if (dtab->minor == NULL || minor >= dtab->size) { |
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| 495 | minor = 0; |
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| 496 | ++major; |
---|
| 497 | if (major >= disktab_size) { |
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| 498 | disk_unlock(); |
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| 499 | |
---|
| 500 | return NULL; |
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| 501 | } |
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| 502 | dtab = disktab + major; |
---|
| 503 | } else if (dtab->minor [minor] == NULL) { |
---|
| 504 | ++minor; |
---|
| 505 | } else { |
---|
| 506 | ++dtab->minor [minor]->uses; |
---|
| 507 | disk_unlock(); |
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| 508 | |
---|
| 509 | return dtab->minor [minor]; |
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[e51bd96] | 510 | } |
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[c8522fd] | 511 | } |
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[e51bd96] | 512 | } |
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| 513 | |
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| 514 | rtems_status_code |
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| 515 | rtems_disk_io_initialize(void) |
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| 516 | { |
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[e41369ef] | 517 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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| 518 | rtems_device_major_number size = DISKTAB_INITIAL_SIZE; |
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[e51bd96] | 519 | |
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[e41369ef] | 520 | if (disktab_size > 0) { |
---|
| 521 | return RTEMS_SUCCESSFUL; |
---|
| 522 | } |
---|
[048dcd2b] | 523 | |
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[e41369ef] | 524 | disktab = calloc(size, sizeof(rtems_disk_device_table)); |
---|
| 525 | if (disktab == NULL) { |
---|
| 526 | return RTEMS_NO_MEMORY; |
---|
| 527 | } |
---|
[e51bd96] | 528 | |
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[e41369ef] | 529 | sc = rtems_bdbuf_init(); |
---|
| 530 | if (sc != RTEMS_SUCCESSFUL) { |
---|
| 531 | free(disktab); |
---|
[048dcd2b] | 532 | |
---|
[e41369ef] | 533 | return RTEMS_UNSATISFIED; |
---|
| 534 | } |
---|
[048dcd2b] | 535 | |
---|
[e41369ef] | 536 | disktab_size = size; |
---|
| 537 | |
---|
| 538 | return RTEMS_SUCCESSFUL; |
---|
[e51bd96] | 539 | } |
---|
| 540 | |
---|
| 541 | rtems_status_code |
---|
| 542 | rtems_disk_io_done(void) |
---|
| 543 | { |
---|
[e41369ef] | 544 | rtems_device_major_number major = 0; |
---|
| 545 | rtems_device_minor_number minor = 0; |
---|
[e51bd96] | 546 | |
---|
[e41369ef] | 547 | for (major = 0; major < disktab_size; ++major) { |
---|
| 548 | rtems_disk_device_table *dtab = disktab + major; |
---|
| 549 | |
---|
| 550 | for (minor = 0; minor < dtab->size; ++minor) { |
---|
| 551 | rtems_disk_device *dd = dtab->minor [minor]; |
---|
| 552 | |
---|
| 553 | if (dd != NULL) { |
---|
| 554 | free_disk_device(dd); |
---|
| 555 | } |
---|
[e51bd96] | 556 | } |
---|
[e41369ef] | 557 | free(dtab->minor); |
---|
| 558 | } |
---|
| 559 | free(disktab); |
---|
| 560 | |
---|
| 561 | disktab = NULL; |
---|
| 562 | disktab_size = 0; |
---|
[048dcd2b] | 563 | |
---|
[e41369ef] | 564 | return RTEMS_SUCCESSFUL; |
---|
[e51bd96] | 565 | } |
---|