Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1 | /* vim:set shiftwidth=4 ts=4: */ |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2 | /* |
| 3 | * QEMU Block driver for virtual VFAT (shadows a local directory) |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 4 | * |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 5 | * Copyright (c) 2004,2005 Johannes E. Schindelin |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 6 | * |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 8 | * of this software and associated documentation files (the "Software"), to deal |
| 9 | * in the Software without restriction, including without limitation the rights |
| 10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 11 | * copies of the Software, and to permit persons to whom the Software is |
| 12 | * furnished to do so, subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be included in |
| 15 | * all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 23 | * THE SOFTWARE. |
| 24 | */ |
Peter Maydell | 80c71a2 | 2016-01-18 18:01:42 +0000 | [diff] [blame] | 25 | #include "qemu/osdep.h" |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 26 | #include <dirent.h> |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 27 | #include "qapi/error.h" |
Paolo Bonzini | 737e150 | 2012-12-17 18:19:44 +0100 | [diff] [blame] | 28 | #include "block/block_int.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 29 | #include "qemu/module.h" |
Paolo Bonzini | 58369e2 | 2016-03-15 17:22:36 +0100 | [diff] [blame] | 30 | #include "qemu/bswap.h" |
Juan Quintela | 795c40b | 2017-04-06 12:00:28 +0200 | [diff] [blame] | 31 | #include "migration/blocker.h" |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 32 | #include "qapi/qmp/qbool.h" |
Markus Armbruster | d49b683 | 2015-03-17 18:29:20 +0100 | [diff] [blame] | 33 | #include "qapi/qmp/qstring.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 34 | #include "qemu/cutils.h" |
Alistair Francis | 2ab4b13 | 2017-09-11 12:52:50 -0700 | [diff] [blame] | 35 | #include "qemu/error-report.h" |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 36 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 37 | #ifndef S_IWGRP |
| 38 | #define S_IWGRP 0 |
| 39 | #endif |
| 40 | #ifndef S_IWOTH |
| 41 | #define S_IWOTH 0 |
| 42 | #endif |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 43 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 44 | /* TODO: add ":bootsector=blabla.img:" */ |
| 45 | /* LATER TODO: add automatic boot sector generation from |
| 46 | BOOTEASY.ASM and Ranish Partition Manager |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 47 | Note that DOS assumes the system files to be the first files in the |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 48 | file system (test if the boot sector still relies on that fact)! */ |
| 49 | /* MAYBE TODO: write block-visofs.c */ |
| 50 | /* TODO: call try_commit() only after a timeout */ |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 51 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 52 | /* #define DEBUG */ |
| 53 | |
| 54 | #ifdef DEBUG |
| 55 | |
| 56 | #define DLOG(a) a |
| 57 | |
blueswir1 | 3f47aa8 | 2008-03-09 06:59:01 +0000 | [diff] [blame] | 58 | static void checkpoint(void); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 59 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 60 | #else |
| 61 | |
| 62 | #define DLOG(a) |
| 63 | |
| 64 | #endif |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 65 | |
Hervé Poussineau | 63d261c | 2017-07-15 15:28:39 +0200 | [diff] [blame] | 66 | /* bootsector OEM name. see related compatibility problems at: |
| 67 | * https://jdebp.eu/FGA/volume-boot-block-oem-name-field.html |
| 68 | * http://seasip.info/Misc/oemid.html |
| 69 | */ |
| 70 | #define BOOTSECTOR_OEM_NAME "MSWIN4.1" |
| 71 | |
Hervé Poussineau | 8c4517f | 2017-07-15 15:28:38 +0200 | [diff] [blame] | 72 | #define DIR_DELETED 0xe5 |
| 73 | #define DIR_KANJI DIR_DELETED |
| 74 | #define DIR_KANJI_FAKE 0x05 |
| 75 | #define DIR_FREE 0x00 |
| 76 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 77 | /* dynamic array functions */ |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 78 | typedef struct array_t { |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 79 | char* pointer; |
| 80 | unsigned int size,next,item_size; |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 81 | } array_t; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 82 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 83 | static inline void array_init(array_t* array,unsigned int item_size) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 84 | { |
blueswir1 | 511d2b1 | 2009-03-07 15:32:56 +0000 | [diff] [blame] | 85 | array->pointer = NULL; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 86 | array->size=0; |
| 87 | array->next=0; |
| 88 | array->item_size=item_size; |
| 89 | } |
| 90 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 91 | static inline void array_free(array_t* array) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 92 | { |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 93 | g_free(array->pointer); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 94 | array->size=array->next=0; |
| 95 | } |
| 96 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 97 | /* does not automatically grow */ |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 98 | static inline void* array_get(array_t* array,unsigned int index) { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 99 | assert(index < array->next); |
| 100 | return array->pointer + index * array->item_size; |
| 101 | } |
| 102 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 103 | static inline int array_ensure_allocated(array_t* array, int index) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 104 | { |
| 105 | if((index + 1) * array->item_size > array->size) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 106 | int new_size = (index + 32) * array->item_size; |
| 107 | array->pointer = g_realloc(array->pointer, new_size); |
| 108 | if (!array->pointer) |
| 109 | return -1; |
Hervé Poussineau | f80256b | 2017-07-15 15:28:41 +0200 | [diff] [blame] | 110 | memset(array->pointer + array->size, 0, new_size - array->size); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 111 | array->size = new_size; |
| 112 | array->next = index + 1; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 113 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 114 | |
| 115 | return 0; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 116 | } |
| 117 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 118 | static inline void* array_get_next(array_t* array) { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 119 | unsigned int next = array->next; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 120 | |
| 121 | if (array_ensure_allocated(array, next) < 0) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 122 | return NULL; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 123 | |
| 124 | array->next = next + 1; |
Eduardo Habkost | 9be3859 | 2016-06-13 18:57:58 -0300 | [diff] [blame] | 125 | return array_get(array, next); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 126 | } |
| 127 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 128 | static inline void* array_insert(array_t* array,unsigned int index,unsigned int count) { |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 129 | if((array->next+count)*array->item_size>array->size) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 130 | int increment=count*array->item_size; |
| 131 | array->pointer=g_realloc(array->pointer,array->size+increment); |
| 132 | if(!array->pointer) |
blueswir1 | 511d2b1 | 2009-03-07 15:32:56 +0000 | [diff] [blame] | 133 | return NULL; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 134 | array->size+=increment; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 135 | } |
| 136 | memmove(array->pointer+(index+count)*array->item_size, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 137 | array->pointer+index*array->item_size, |
| 138 | (array->next-index)*array->item_size); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 139 | array->next+=count; |
| 140 | return array->pointer+index*array->item_size; |
| 141 | } |
| 142 | |
| 143 | /* this performs a "roll", so that the element which was at index_from becomes |
| 144 | * index_to, but the order of all other elements is preserved. */ |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 145 | static inline int array_roll(array_t* array,int index_to,int index_from,int count) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 146 | { |
| 147 | char* buf; |
| 148 | char* from; |
| 149 | char* to; |
| 150 | int is; |
| 151 | |
| 152 | if(!array || |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 153 | index_to<0 || index_to>=array->next || |
| 154 | index_from<0 || index_from>=array->next) |
| 155 | return -1; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 156 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 157 | if(index_to==index_from) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 158 | return 0; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 159 | |
| 160 | is=array->item_size; |
| 161 | from=array->pointer+index_from*is; |
| 162 | to=array->pointer+index_to*is; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 163 | buf=g_malloc(is*count); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 164 | memcpy(buf,from,is*count); |
| 165 | |
| 166 | if(index_to<index_from) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 167 | memmove(to+is*count,to,from-to); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 168 | else |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 169 | memmove(from,from+is*count,to-from); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 170 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 171 | memcpy(to,buf,is*count); |
| 172 | |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 173 | g_free(buf); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 178 | static inline int array_remove_slice(array_t* array,int index, int count) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 179 | { |
| 180 | assert(index >=0); |
| 181 | assert(count > 0); |
| 182 | assert(index + count <= array->next); |
| 183 | if(array_roll(array,array->next-1,index,count)) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 184 | return -1; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 185 | array->next -= count; |
| 186 | return 0; |
| 187 | } |
| 188 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 189 | static int array_remove(array_t* array,int index) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 190 | { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 191 | return array_remove_slice(array, index, 1); |
| 192 | } |
| 193 | |
| 194 | /* return the index for a given member */ |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 195 | static int array_index(array_t* array, void* pointer) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 196 | { |
| 197 | size_t offset = (char*)pointer - array->pointer; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 198 | assert((offset % array->item_size) == 0); |
| 199 | assert(offset/array->item_size < array->next); |
| 200 | return offset/array->item_size; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | /* These structures are used to fake a disk and the VFAT filesystem. |
Stefan Weil | 541dc0d | 2011-08-31 12:38:01 +0200 | [diff] [blame] | 204 | * For this reason we need to use QEMU_PACKED. */ |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 205 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 206 | typedef struct bootsector_t { |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 207 | uint8_t jump[3]; |
| 208 | uint8_t name[8]; |
| 209 | uint16_t sector_size; |
| 210 | uint8_t sectors_per_cluster; |
| 211 | uint16_t reserved_sectors; |
| 212 | uint8_t number_of_fats; |
| 213 | uint16_t root_entries; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 214 | uint16_t total_sectors16; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 215 | uint8_t media_type; |
| 216 | uint16_t sectors_per_fat; |
| 217 | uint16_t sectors_per_track; |
| 218 | uint16_t number_of_heads; |
| 219 | uint32_t hidden_sectors; |
| 220 | uint32_t total_sectors; |
| 221 | union { |
| 222 | struct { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 223 | uint8_t drive_number; |
Hervé Poussineau | 92e28d8 | 2017-05-22 23:11:58 +0200 | [diff] [blame] | 224 | uint8_t reserved1; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 225 | uint8_t signature; |
| 226 | uint32_t id; |
| 227 | uint8_t volume_label[11]; |
Hervé Poussineau | 92e28d8 | 2017-05-22 23:11:58 +0200 | [diff] [blame] | 228 | uint8_t fat_type[8]; |
| 229 | uint8_t ignored[0x1c0]; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 230 | } QEMU_PACKED fat16; |
| 231 | struct { |
| 232 | uint32_t sectors_per_fat; |
| 233 | uint16_t flags; |
| 234 | uint8_t major,minor; |
Hervé Poussineau | 92e28d8 | 2017-05-22 23:11:58 +0200 | [diff] [blame] | 235 | uint32_t first_cluster_of_root_dir; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 236 | uint16_t info_sector; |
| 237 | uint16_t backup_boot_sector; |
Hervé Poussineau | 92e28d8 | 2017-05-22 23:11:58 +0200 | [diff] [blame] | 238 | uint8_t reserved[12]; |
| 239 | uint8_t drive_number; |
| 240 | uint8_t reserved1; |
| 241 | uint8_t signature; |
| 242 | uint32_t id; |
| 243 | uint8_t volume_label[11]; |
| 244 | uint8_t fat_type[8]; |
| 245 | uint8_t ignored[0x1a4]; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 246 | } QEMU_PACKED fat32; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 247 | } u; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 248 | uint8_t magic[2]; |
Stefan Weil | 541dc0d | 2011-08-31 12:38:01 +0200 | [diff] [blame] | 249 | } QEMU_PACKED bootsector_t; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 250 | |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 251 | typedef struct { |
| 252 | uint8_t head; |
| 253 | uint8_t sector; |
| 254 | uint8_t cylinder; |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 255 | } mbr_chs_t; |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 256 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 257 | typedef struct partition_t { |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 258 | uint8_t attributes; /* 0x80 = bootable */ |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 259 | mbr_chs_t start_CHS; |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 260 | uint8_t fs_type; /* 0x1 = FAT12, 0x6 = FAT16, 0xe = FAT16_LBA, 0xb = FAT32, 0xc = FAT32_LBA */ |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 261 | mbr_chs_t end_CHS; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 262 | uint32_t start_sector_long; |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 263 | uint32_t length_sector_long; |
Stefan Weil | 541dc0d | 2011-08-31 12:38:01 +0200 | [diff] [blame] | 264 | } QEMU_PACKED partition_t; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 265 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 266 | typedef struct mbr_t { |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 267 | uint8_t ignored[0x1b8]; |
| 268 | uint32_t nt_id; |
| 269 | uint8_t ignored2[2]; |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 270 | partition_t partition[4]; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 271 | uint8_t magic[2]; |
Stefan Weil | 541dc0d | 2011-08-31 12:38:01 +0200 | [diff] [blame] | 272 | } QEMU_PACKED mbr_t; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 273 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 274 | typedef struct direntry_t { |
Stefan Weil | f671d17 | 2013-12-11 21:37:11 +0100 | [diff] [blame] | 275 | uint8_t name[8 + 3]; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 276 | uint8_t attributes; |
| 277 | uint8_t reserved[2]; |
| 278 | uint16_t ctime; |
| 279 | uint16_t cdate; |
| 280 | uint16_t adate; |
| 281 | uint16_t begin_hi; |
| 282 | uint16_t mtime; |
| 283 | uint16_t mdate; |
| 284 | uint16_t begin; |
| 285 | uint32_t size; |
Stefan Weil | 541dc0d | 2011-08-31 12:38:01 +0200 | [diff] [blame] | 286 | } QEMU_PACKED direntry_t; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 287 | |
| 288 | /* this structure are used to transparently access the files */ |
| 289 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 290 | typedef struct mapping_t { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 291 | /* begin is the first cluster, end is the last+1 */ |
| 292 | uint32_t begin,end; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 293 | /* as s->directory is growable, no pointer may be used here */ |
| 294 | unsigned int dir_index; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 295 | /* the clusters of a file may be in any order; this points to the first */ |
| 296 | int first_mapping_index; |
| 297 | union { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 298 | /* offset is |
| 299 | * - the offset in the file (in clusters) for a file, or |
Hervé Poussineau | ad05b31 | 2017-05-22 23:11:56 +0200 | [diff] [blame] | 300 | * - the next cluster of the directory for a directory |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 301 | */ |
| 302 | struct { |
| 303 | uint32_t offset; |
| 304 | } file; |
| 305 | struct { |
| 306 | int parent_mapping_index; |
| 307 | int first_dir_index; |
| 308 | } dir; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 309 | } info; |
| 310 | /* path contains the full path, i.e. it always starts with s->path */ |
| 311 | char* path; |
| 312 | |
Hervé Poussineau | ad05b31 | 2017-05-22 23:11:56 +0200 | [diff] [blame] | 313 | enum { |
| 314 | MODE_UNDEFINED = 0, |
| 315 | MODE_NORMAL = 1, |
| 316 | MODE_MODIFIED = 2, |
| 317 | MODE_DIRECTORY = 4, |
| 318 | MODE_DELETED = 8, |
| 319 | } mode; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 320 | int read_only; |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 321 | } mapping_t; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 322 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 323 | #ifdef DEBUG |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 324 | static void print_direntry(const struct direntry_t*); |
| 325 | static void print_mapping(const struct mapping_t* mapping); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 326 | #endif |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 327 | |
| 328 | /* here begins the real VVFAT driver */ |
| 329 | |
| 330 | typedef struct BDRVVVFATState { |
Paolo Bonzini | 848c66e | 2011-10-20 13:16:21 +0200 | [diff] [blame] | 331 | CoMutex lock; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 332 | BlockDriverState* bs; /* pointer to parent */ |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 333 | unsigned char first_sectors[0x40*0x200]; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 334 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 335 | int fat_type; /* 16 or 32 */ |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 336 | array_t fat,directory,mapping; |
Wolfgang Bumiller | d5941dd | 2015-06-19 11:35:29 +0200 | [diff] [blame] | 337 | char volume_label[11]; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 338 | |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 339 | uint32_t offset_to_bootsector; /* 0 for floppy, 0x3f for disk */ |
| 340 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 341 | unsigned int cluster_size; |
| 342 | unsigned int sectors_per_cluster; |
| 343 | unsigned int sectors_per_fat; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 344 | uint32_t last_cluster_of_root_directory; |
Hervé Poussineau | 6817efe | 2017-05-22 23:12:03 +0200 | [diff] [blame] | 345 | /* how many entries are available in root directory (0 for FAT32) */ |
| 346 | uint16_t root_entries; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 347 | uint32_t sector_count; /* total number of sectors of the partition */ |
| 348 | uint32_t cluster_count; /* total number of clusters of this partition */ |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 349 | uint32_t max_fat_value; |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 350 | uint32_t offset_to_fat; |
| 351 | uint32_t offset_to_root_dir; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 352 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 353 | int current_fd; |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 354 | mapping_t* current_mapping; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 355 | unsigned char* cluster; /* points to current cluster */ |
| 356 | unsigned char* cluster_buffer; /* points to a buffer to hold temp data */ |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 357 | unsigned int current_cluster; |
| 358 | |
| 359 | /* write support */ |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 360 | char* qcow_filename; |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 361 | BdrvChild* qcow; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 362 | void* fat2; |
| 363 | char* used_clusters; |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 364 | array_t commits; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 365 | const char* path; |
| 366 | int downcase_short_names; |
Kevin Wolf | 3397f0c | 2011-11-22 16:52:13 +0100 | [diff] [blame] | 367 | |
| 368 | Error *migration_blocker; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 369 | } BDRVVVFATState; |
| 370 | |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 371 | /* take the sector position spos and convert it to Cylinder/Head/Sector position |
| 372 | * if the position is outside the specified geometry, fill maximum value for CHS |
| 373 | * and return 1 to signal overflow. |
| 374 | */ |
Markus Armbruster | 4480e0f | 2012-07-10 11:12:29 +0200 | [diff] [blame] | 375 | static int sector2CHS(mbr_chs_t *chs, int spos, int cyls, int heads, int secs) |
| 376 | { |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 377 | int head,sector; |
Markus Armbruster | 4480e0f | 2012-07-10 11:12:29 +0200 | [diff] [blame] | 378 | sector = spos % secs; spos /= secs; |
| 379 | head = spos % heads; spos /= heads; |
| 380 | if (spos >= cyls) { |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 381 | /* Overflow, |
| 382 | it happens if 32bit sector positions are used, while CHS is only 24bit. |
| 383 | Windows/Dos is said to take 1023/255/63 as nonrepresentable CHS */ |
| 384 | chs->head = 0xFF; |
| 385 | chs->sector = 0xFF; |
| 386 | chs->cylinder = 0xFF; |
| 387 | return 1; |
| 388 | } |
| 389 | chs->head = (uint8_t)head; |
| 390 | chs->sector = (uint8_t)( (sector+1) | ((spos>>8)<<6) ); |
| 391 | chs->cylinder = (uint8_t)spos; |
| 392 | return 0; |
| 393 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 394 | |
Markus Armbruster | 4480e0f | 2012-07-10 11:12:29 +0200 | [diff] [blame] | 395 | static void init_mbr(BDRVVVFATState *s, int cyls, int heads, int secs) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 396 | { |
| 397 | /* TODO: if the files mbr.img and bootsect.img exist, use them */ |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 398 | mbr_t* real_mbr=(mbr_t*)s->first_sectors; |
| 399 | partition_t* partition = &(real_mbr->partition[0]); |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 400 | int lba; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 401 | |
| 402 | memset(s->first_sectors,0,512); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 403 | |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 404 | /* Win NT Disk Signature */ |
| 405 | real_mbr->nt_id= cpu_to_le32(0xbe1afdfa); |
| 406 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 407 | partition->attributes=0x80; /* bootable */ |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 408 | |
| 409 | /* LBA is used when partition is outside the CHS geometry */ |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 410 | lba = sector2CHS(&partition->start_CHS, s->offset_to_bootsector, |
Markus Armbruster | 4480e0f | 2012-07-10 11:12:29 +0200 | [diff] [blame] | 411 | cyls, heads, secs); |
| 412 | lba |= sector2CHS(&partition->end_CHS, s->bs->total_sectors - 1, |
| 413 | cyls, heads, secs); |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 414 | |
| 415 | /*LBA partitions are identified only by start/length_sector_long not by CHS*/ |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 416 | partition->start_sector_long = cpu_to_le32(s->offset_to_bootsector); |
Markus Armbruster | f91cbef | 2012-07-10 11:12:28 +0200 | [diff] [blame] | 417 | partition->length_sector_long = cpu_to_le32(s->bs->total_sectors |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 418 | - s->offset_to_bootsector); |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 419 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 420 | /* FAT12/FAT16/FAT32 */ |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 421 | /* DOS uses different types when partition is LBA, |
| 422 | probably to prevent older versions from using CHS on them */ |
Hervé Poussineau | 5f5b29d | 2017-05-22 23:11:55 +0200 | [diff] [blame] | 423 | partition->fs_type = s->fat_type == 12 ? 0x1 : |
| 424 | s->fat_type == 16 ? (lba ? 0xe : 0x06) : |
| 425 | /*s->fat_type == 32*/ (lba ? 0xc : 0x0b); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 426 | |
| 427 | real_mbr->magic[0]=0x55; real_mbr->magic[1]=0xaa; |
| 428 | } |
| 429 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 430 | /* direntry functions */ |
| 431 | |
Hervé Poussineau | 09ec411 | 2017-05-22 23:12:00 +0200 | [diff] [blame] | 432 | static direntry_t *create_long_filename(BDRVVVFATState *s, const char *filename) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 433 | { |
Hervé Poussineau | 09ec411 | 2017-05-22 23:12:00 +0200 | [diff] [blame] | 434 | int number_of_entries, i; |
| 435 | glong length; |
| 436 | direntry_t *entry; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 437 | |
Hervé Poussineau | 09ec411 | 2017-05-22 23:12:00 +0200 | [diff] [blame] | 438 | gunichar2 *longname = g_utf8_to_utf16(filename, -1, NULL, &length, NULL); |
| 439 | if (!longname) { |
| 440 | fprintf(stderr, "vvfat: invalid UTF-8 name: %s\n", filename); |
| 441 | return NULL; |
| 442 | } |
| 443 | |
Marc-André Lureau | 78ee96d | 2017-06-22 13:04:16 +0200 | [diff] [blame] | 444 | number_of_entries = DIV_ROUND_UP(length * 2, 26); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 445 | |
| 446 | for(i=0;i<number_of_entries;i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 447 | entry=array_get_next(&(s->directory)); |
| 448 | entry->attributes=0xf; |
| 449 | entry->reserved[0]=0; |
| 450 | entry->begin=0; |
| 451 | entry->name[0]=(number_of_entries-i)|(i==0?0x40:0); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 452 | } |
balrog | 1e080d5 | 2007-12-24 13:26:04 +0000 | [diff] [blame] | 453 | for(i=0;i<26*number_of_entries;i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 454 | int offset=(i%26); |
| 455 | if(offset<10) offset=1+offset; |
| 456 | else if(offset<22) offset=14+offset-10; |
| 457 | else offset=28+offset-22; |
| 458 | entry=array_get(&(s->directory),s->directory.next-1-(i/26)); |
Hervé Poussineau | 09ec411 | 2017-05-22 23:12:00 +0200 | [diff] [blame] | 459 | if (i >= 2 * length + 2) { |
| 460 | entry->name[offset] = 0xff; |
| 461 | } else if (i % 2 == 0) { |
| 462 | entry->name[offset] = longname[i / 2] & 0xff; |
| 463 | } else { |
| 464 | entry->name[offset] = longname[i / 2] >> 8; |
| 465 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 466 | } |
Hervé Poussineau | 09ec411 | 2017-05-22 23:12:00 +0200 | [diff] [blame] | 467 | g_free(longname); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 468 | return array_get(&(s->directory),s->directory.next-number_of_entries); |
| 469 | } |
| 470 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 471 | static char is_free(const direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 472 | { |
Hervé Poussineau | 8c4517f | 2017-07-15 15:28:38 +0200 | [diff] [blame] | 473 | return direntry->name[0] == DIR_DELETED || direntry->name[0] == DIR_FREE; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 474 | } |
| 475 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 476 | static char is_volume_label(const direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 477 | { |
| 478 | return direntry->attributes == 0x28; |
| 479 | } |
| 480 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 481 | static char is_long_name(const direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 482 | { |
| 483 | return direntry->attributes == 0xf; |
| 484 | } |
| 485 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 486 | static char is_short_name(const direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 487 | { |
| 488 | return !is_volume_label(direntry) && !is_long_name(direntry) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 489 | && !is_free(direntry); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 490 | } |
| 491 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 492 | static char is_directory(const direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 493 | { |
Hervé Poussineau | 8c4517f | 2017-07-15 15:28:38 +0200 | [diff] [blame] | 494 | return direntry->attributes & 0x10 && direntry->name[0] != DIR_DELETED; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 495 | } |
| 496 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 497 | static inline char is_dot(const direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 498 | { |
| 499 | return is_short_name(direntry) && direntry->name[0] == '.'; |
| 500 | } |
| 501 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 502 | static char is_file(const direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 503 | { |
| 504 | return is_short_name(direntry) && !is_directory(direntry); |
| 505 | } |
| 506 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 507 | static inline uint32_t begin_of_direntry(const direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 508 | { |
| 509 | return le16_to_cpu(direntry->begin)|(le16_to_cpu(direntry->begin_hi)<<16); |
| 510 | } |
| 511 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 512 | static inline uint32_t filesize_of_direntry(const direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 513 | { |
| 514 | return le32_to_cpu(direntry->size); |
| 515 | } |
| 516 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 517 | static void set_begin_of_direntry(direntry_t* direntry, uint32_t begin) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 518 | { |
| 519 | direntry->begin = cpu_to_le16(begin & 0xffff); |
| 520 | direntry->begin_hi = cpu_to_le16((begin >> 16) & 0xffff); |
| 521 | } |
| 522 | |
Hervé Poussineau | 0c36111 | 2017-05-22 23:12:01 +0200 | [diff] [blame] | 523 | static uint8_t to_valid_short_char(gunichar c) |
| 524 | { |
| 525 | c = g_unichar_toupper(c); |
| 526 | if ((c >= '0' && c <= '9') || |
| 527 | (c >= 'A' && c <= 'Z') || |
| 528 | strchr("$%'-_@~`!(){}^#&", c) != 0) { |
| 529 | return c; |
| 530 | } else { |
| 531 | return 0; |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | static direntry_t *create_short_filename(BDRVVVFATState *s, |
Hervé Poussineau | 339cebc | 2017-05-22 23:12:02 +0200 | [diff] [blame] | 536 | const char *filename, |
| 537 | unsigned int directory_start) |
Hervé Poussineau | 0c36111 | 2017-05-22 23:12:01 +0200 | [diff] [blame] | 538 | { |
Hervé Poussineau | 339cebc | 2017-05-22 23:12:02 +0200 | [diff] [blame] | 539 | int i, j = 0; |
Hervé Poussineau | 0c36111 | 2017-05-22 23:12:01 +0200 | [diff] [blame] | 540 | direntry_t *entry = array_get_next(&(s->directory)); |
| 541 | const gchar *p, *last_dot = NULL; |
| 542 | gunichar c; |
| 543 | bool lossy_conversion = false; |
Max Reitz | 7c8730d | 2017-07-17 17:12:07 +0200 | [diff] [blame] | 544 | char tail[8]; |
Hervé Poussineau | 0c36111 | 2017-05-22 23:12:01 +0200 | [diff] [blame] | 545 | |
| 546 | if (!entry) { |
| 547 | return NULL; |
| 548 | } |
| 549 | memset(entry->name, 0x20, sizeof(entry->name)); |
| 550 | |
| 551 | /* copy filename and search last dot */ |
| 552 | for (p = filename; ; p = g_utf8_next_char(p)) { |
| 553 | c = g_utf8_get_char(p); |
| 554 | if (c == '\0') { |
| 555 | break; |
| 556 | } else if (c == '.') { |
| 557 | if (j == 0) { |
| 558 | /* '.' at start of filename */ |
| 559 | lossy_conversion = true; |
| 560 | } else { |
| 561 | if (last_dot) { |
| 562 | lossy_conversion = true; |
| 563 | } |
| 564 | last_dot = p; |
| 565 | } |
| 566 | } else if (!last_dot) { |
| 567 | /* first part of the name; copy it */ |
| 568 | uint8_t v = to_valid_short_char(c); |
| 569 | if (j < 8 && v) { |
| 570 | entry->name[j++] = v; |
| 571 | } else { |
| 572 | lossy_conversion = true; |
| 573 | } |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | /* copy extension (if any) */ |
| 578 | if (last_dot) { |
| 579 | j = 0; |
| 580 | for (p = g_utf8_next_char(last_dot); ; p = g_utf8_next_char(p)) { |
| 581 | c = g_utf8_get_char(p); |
| 582 | if (c == '\0') { |
| 583 | break; |
| 584 | } else { |
| 585 | /* extension; copy it */ |
| 586 | uint8_t v = to_valid_short_char(c); |
| 587 | if (j < 3 && v) { |
| 588 | entry->name[8 + (j++)] = v; |
| 589 | } else { |
| 590 | lossy_conversion = true; |
| 591 | } |
| 592 | } |
| 593 | } |
| 594 | } |
Hervé Poussineau | 339cebc | 2017-05-22 23:12:02 +0200 | [diff] [blame] | 595 | |
Hervé Poussineau | 8c4517f | 2017-07-15 15:28:38 +0200 | [diff] [blame] | 596 | if (entry->name[0] == DIR_KANJI) { |
| 597 | entry->name[0] = DIR_KANJI_FAKE; |
Hervé Poussineau | 78f002c | 2017-05-22 23:12:04 +0200 | [diff] [blame] | 598 | } |
| 599 | |
Hervé Poussineau | 339cebc | 2017-05-22 23:12:02 +0200 | [diff] [blame] | 600 | /* numeric-tail generation */ |
| 601 | for (j = 0; j < 8; j++) { |
| 602 | if (entry->name[j] == ' ') { |
| 603 | break; |
| 604 | } |
| 605 | } |
| 606 | for (i = lossy_conversion ? 1 : 0; i < 999999; i++) { |
| 607 | direntry_t *entry1; |
| 608 | if (i > 0) { |
Max Reitz | 7c8730d | 2017-07-17 17:12:07 +0200 | [diff] [blame] | 609 | int len = snprintf(tail, sizeof(tail), "~%u", (unsigned)i); |
| 610 | assert(len <= 7); |
Hervé Poussineau | 339cebc | 2017-05-22 23:12:02 +0200 | [diff] [blame] | 611 | memcpy(entry->name + MIN(j, 8 - len), tail, len); |
| 612 | } |
| 613 | for (entry1 = array_get(&(s->directory), directory_start); |
| 614 | entry1 < entry; entry1++) { |
| 615 | if (!is_long_name(entry1) && |
| 616 | !memcmp(entry1->name, entry->name, 11)) { |
| 617 | break; /* found dupe */ |
| 618 | } |
| 619 | } |
| 620 | if (entry1 == entry) { |
| 621 | /* no dupe found */ |
| 622 | return entry; |
| 623 | } |
| 624 | } |
| 625 | return NULL; |
Hervé Poussineau | 0c36111 | 2017-05-22 23:12:01 +0200 | [diff] [blame] | 626 | } |
| 627 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 628 | /* fat functions */ |
| 629 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 630 | static inline uint8_t fat_chksum(const direntry_t* entry) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 631 | { |
| 632 | uint8_t chksum=0; |
| 633 | int i; |
| 634 | |
Stefan Weil | f671d17 | 2013-12-11 21:37:11 +0100 | [diff] [blame] | 635 | for (i = 0; i < ARRAY_SIZE(entry->name); i++) { |
| 636 | chksum = (((chksum & 0xfe) >> 1) | |
| 637 | ((chksum & 0x01) ? 0x80 : 0)) + entry->name[i]; |
Aurelien Jarno | 5606c22 | 2009-04-25 00:08:05 +0200 | [diff] [blame] | 638 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 639 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 640 | return chksum; |
| 641 | } |
| 642 | |
| 643 | /* if return_time==0, this returns the fat_date, else the fat_time */ |
| 644 | static uint16_t fat_datetime(time_t time,int return_time) { |
| 645 | struct tm* t; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 646 | struct tm t1; |
Michael S. Tsirkin | 6ab00ce | 2009-09-30 19:43:31 +0200 | [diff] [blame] | 647 | t = &t1; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 648 | localtime_r(&time,t); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 649 | if(return_time) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 650 | return cpu_to_le16((t->tm_sec/2)|(t->tm_min<<5)|(t->tm_hour<<11)); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 651 | return cpu_to_le16((t->tm_mday)|((t->tm_mon+1)<<5)|((t->tm_year-80)<<9)); |
| 652 | } |
| 653 | |
| 654 | static inline void fat_set(BDRVVVFATState* s,unsigned int cluster,uint32_t value) |
| 655 | { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 656 | if(s->fat_type==32) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 657 | uint32_t* entry=array_get(&(s->fat),cluster); |
| 658 | *entry=cpu_to_le32(value); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 659 | } else if(s->fat_type==16) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 660 | uint16_t* entry=array_get(&(s->fat),cluster); |
| 661 | *entry=cpu_to_le16(value&0xffff); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 662 | } else { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 663 | int offset = (cluster*3/2); |
| 664 | unsigned char* p = array_get(&(s->fat), offset); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 665 | switch (cluster&1) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 666 | case 0: |
| 667 | p[0] = value&0xff; |
| 668 | p[1] = (p[1]&0xf0) | ((value>>8)&0xf); |
| 669 | break; |
| 670 | case 1: |
| 671 | p[0] = (p[0]&0xf) | ((value&0xf)<<4); |
| 672 | p[1] = (value>>4); |
| 673 | break; |
| 674 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 675 | } |
| 676 | } |
| 677 | |
| 678 | static inline uint32_t fat_get(BDRVVVFATState* s,unsigned int cluster) |
| 679 | { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 680 | if(s->fat_type==32) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 681 | uint32_t* entry=array_get(&(s->fat),cluster); |
| 682 | return le32_to_cpu(*entry); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 683 | } else if(s->fat_type==16) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 684 | uint16_t* entry=array_get(&(s->fat),cluster); |
| 685 | return le16_to_cpu(*entry); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 686 | } else { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 687 | const uint8_t* x=(uint8_t*)(s->fat.pointer)+cluster*3/2; |
| 688 | return ((x[0]|(x[1]<<8))>>(cluster&1?4:0))&0x0fff; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 689 | } |
| 690 | } |
| 691 | |
| 692 | static inline int fat_eof(BDRVVVFATState* s,uint32_t fat_entry) |
| 693 | { |
| 694 | if(fat_entry>s->max_fat_value-8) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 695 | return -1; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 696 | return 0; |
| 697 | } |
| 698 | |
| 699 | static inline void init_fat(BDRVVVFATState* s) |
| 700 | { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 701 | if (s->fat_type == 12) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 702 | array_init(&(s->fat),1); |
| 703 | array_ensure_allocated(&(s->fat), |
| 704 | s->sectors_per_fat * 0x200 * 3 / 2 - 1); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 705 | } else { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 706 | array_init(&(s->fat),(s->fat_type==32?4:2)); |
| 707 | array_ensure_allocated(&(s->fat), |
| 708 | s->sectors_per_fat * 0x200 / s->fat.item_size - 1); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 709 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 710 | memset(s->fat.pointer,0,s->fat.size); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 711 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 712 | switch(s->fat_type) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 713 | case 12: s->max_fat_value=0xfff; break; |
| 714 | case 16: s->max_fat_value=0xffff; break; |
| 715 | case 32: s->max_fat_value=0x0fffffff; break; |
| 716 | default: s->max_fat_value=0; /* error... */ |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 717 | } |
| 718 | |
| 719 | } |
| 720 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 721 | static inline direntry_t* create_short_and_long_name(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 722 | unsigned int directory_start, const char* filename, int is_dot) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 723 | { |
Hervé Poussineau | 0c36111 | 2017-05-22 23:12:01 +0200 | [diff] [blame] | 724 | int long_index = s->directory.next; |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 725 | direntry_t* entry = NULL; |
| 726 | direntry_t* entry_long = NULL; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 727 | |
| 728 | if(is_dot) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 729 | entry=array_get_next(&(s->directory)); |
Stefan Weil | f671d17 | 2013-12-11 21:37:11 +0100 | [diff] [blame] | 730 | memset(entry->name, 0x20, sizeof(entry->name)); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 731 | memcpy(entry->name,filename,strlen(filename)); |
| 732 | return entry; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 733 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 734 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 735 | entry_long=create_long_filename(s,filename); |
Hervé Poussineau | 339cebc | 2017-05-22 23:12:02 +0200 | [diff] [blame] | 736 | entry = create_short_filename(s, filename, directory_start); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 737 | |
| 738 | /* calculate checksum; propagate to long name */ |
| 739 | if(entry_long) { |
| 740 | uint8_t chksum=fat_chksum(entry); |
| 741 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 742 | /* calculate anew, because realloc could have taken place */ |
| 743 | entry_long=array_get(&(s->directory),long_index); |
| 744 | while(entry_long<entry && is_long_name(entry_long)) { |
| 745 | entry_long->reserved[1]=chksum; |
| 746 | entry_long++; |
| 747 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 748 | } |
| 749 | |
| 750 | return entry; |
| 751 | } |
| 752 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 753 | /* |
| 754 | * Read a directory. (the index of the corresponding mapping must be passed). |
| 755 | */ |
| 756 | static int read_directory(BDRVVVFATState* s, int mapping_index) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 757 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 758 | mapping_t* mapping = array_get(&(s->mapping), mapping_index); |
| 759 | direntry_t* direntry; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 760 | const char* dirname = mapping->path; |
| 761 | int first_cluster = mapping->begin; |
| 762 | int parent_index = mapping->info.dir.parent_mapping_index; |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 763 | mapping_t* parent_mapping = (mapping_t*) |
blueswir1 | 511d2b1 | 2009-03-07 15:32:56 +0000 | [diff] [blame] | 764 | (parent_index >= 0 ? array_get(&(s->mapping), parent_index) : NULL); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 765 | int first_cluster_of_parent = parent_mapping ? parent_mapping->begin : -1; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 766 | |
| 767 | DIR* dir=opendir(dirname); |
| 768 | struct dirent* entry; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 769 | int i; |
| 770 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 771 | assert(mapping->mode & MODE_DIRECTORY); |
| 772 | |
| 773 | if(!dir) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 774 | mapping->end = mapping->begin; |
| 775 | return -1; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 776 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 777 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 778 | i = mapping->info.dir.first_dir_index = |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 779 | first_cluster == 0 ? 0 : s->directory.next; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 780 | |
Hervé Poussineau | f82d92b | 2017-05-22 23:11:59 +0200 | [diff] [blame] | 781 | if (first_cluster != 0) { |
| 782 | /* create the top entries of a subdirectory */ |
| 783 | (void)create_short_and_long_name(s, i, ".", 1); |
| 784 | (void)create_short_and_long_name(s, i, "..", 1); |
| 785 | } |
| 786 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 787 | /* actually read the directory, and allocate the mappings */ |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 788 | while((entry=readdir(dir))) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 789 | unsigned int length=strlen(dirname)+2+strlen(entry->d_name); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 790 | char* buffer; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 791 | direntry_t* direntry; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 792 | struct stat st; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 793 | int is_dot=!strcmp(entry->d_name,"."); |
| 794 | int is_dotdot=!strcmp(entry->d_name,".."); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 795 | |
Hervé Poussineau | 6817efe | 2017-05-22 23:12:03 +0200 | [diff] [blame] | 796 | if (first_cluster == 0 && s->directory.next >= s->root_entries - 1) { |
| 797 | fprintf(stderr, "Too many entries in root directory\n"); |
| 798 | closedir(dir); |
| 799 | return -2; |
| 800 | } |
| 801 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 802 | if(first_cluster == 0 && (is_dotdot || is_dot)) |
| 803 | continue; |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 804 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 805 | buffer = g_malloc(length); |
| 806 | snprintf(buffer,length,"%s/%s",dirname,entry->d_name); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 807 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 808 | if(stat(buffer,&st)<0) { |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 809 | g_free(buffer); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 810 | continue; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 811 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 812 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 813 | /* create directory entry for this file */ |
Hervé Poussineau | f82d92b | 2017-05-22 23:11:59 +0200 | [diff] [blame] | 814 | if (!is_dot && !is_dotdot) { |
| 815 | direntry = create_short_and_long_name(s, i, entry->d_name, 0); |
| 816 | } else { |
| 817 | direntry = array_get(&(s->directory), is_dot ? i : i + 1); |
| 818 | } |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 819 | direntry->attributes=(S_ISDIR(st.st_mode)?0x10:0x20); |
| 820 | direntry->reserved[0]=direntry->reserved[1]=0; |
| 821 | direntry->ctime=fat_datetime(st.st_ctime,1); |
| 822 | direntry->cdate=fat_datetime(st.st_ctime,0); |
| 823 | direntry->adate=fat_datetime(st.st_atime,0); |
| 824 | direntry->begin_hi=0; |
| 825 | direntry->mtime=fat_datetime(st.st_mtime,1); |
| 826 | direntry->mdate=fat_datetime(st.st_mtime,0); |
| 827 | if(is_dotdot) |
| 828 | set_begin_of_direntry(direntry, first_cluster_of_parent); |
| 829 | else if(is_dot) |
| 830 | set_begin_of_direntry(direntry, first_cluster); |
| 831 | else |
| 832 | direntry->begin=0; /* do that later */ |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 833 | if (st.st_size > 0x7fffffff) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 834 | fprintf(stderr, "File %s is larger than 2GB\n", buffer); |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 835 | g_free(buffer); |
Blue Swirl | 08089ed | 2011-01-12 19:48:58 +0000 | [diff] [blame] | 836 | closedir(dir); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 837 | return -2; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 838 | } |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 839 | direntry->size=cpu_to_le32(S_ISDIR(st.st_mode)?0:st.st_size); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 840 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 841 | /* create mapping for this file */ |
| 842 | if(!is_dot && !is_dotdot && (S_ISDIR(st.st_mode) || st.st_size)) { |
| 843 | s->current_mapping = array_get_next(&(s->mapping)); |
| 844 | s->current_mapping->begin=0; |
| 845 | s->current_mapping->end=st.st_size; |
| 846 | /* |
| 847 | * we get the direntry of the most recent direntry, which |
| 848 | * contains the short name and all the relevant information. |
| 849 | */ |
| 850 | s->current_mapping->dir_index=s->directory.next-1; |
| 851 | s->current_mapping->first_mapping_index = -1; |
| 852 | if (S_ISDIR(st.st_mode)) { |
| 853 | s->current_mapping->mode = MODE_DIRECTORY; |
| 854 | s->current_mapping->info.dir.parent_mapping_index = |
| 855 | mapping_index; |
| 856 | } else { |
| 857 | s->current_mapping->mode = MODE_UNDEFINED; |
| 858 | s->current_mapping->info.file.offset = 0; |
| 859 | } |
| 860 | s->current_mapping->path=buffer; |
| 861 | s->current_mapping->read_only = |
| 862 | (st.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH)) == 0; |
Markus Armbruster | b122c3b | 2014-05-28 11:17:05 +0200 | [diff] [blame] | 863 | } else { |
| 864 | g_free(buffer); |
| 865 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 866 | } |
| 867 | closedir(dir); |
| 868 | |
| 869 | /* fill with zeroes up to the end of the cluster */ |
| 870 | while(s->directory.next%(0x10*s->sectors_per_cluster)) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 871 | direntry_t* direntry=array_get_next(&(s->directory)); |
| 872 | memset(direntry,0,sizeof(direntry_t)); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 873 | } |
| 874 | |
Hervé Poussineau | 6817efe | 2017-05-22 23:12:03 +0200 | [diff] [blame] | 875 | if (s->fat_type != 32 && |
| 876 | mapping_index == 0 && |
| 877 | s->directory.next < s->root_entries) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 878 | /* root directory */ |
| 879 | int cur = s->directory.next; |
Hervé Poussineau | 6817efe | 2017-05-22 23:12:03 +0200 | [diff] [blame] | 880 | array_ensure_allocated(&(s->directory), s->root_entries - 1); |
| 881 | s->directory.next = s->root_entries; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 882 | memset(array_get(&(s->directory), cur), 0, |
Hervé Poussineau | 6817efe | 2017-05-22 23:12:03 +0200 | [diff] [blame] | 883 | (s->root_entries - cur) * sizeof(direntry_t)); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 884 | } |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 885 | |
Hervé Poussineau | 5f5b29d | 2017-05-22 23:11:55 +0200 | [diff] [blame] | 886 | /* re-get the mapping, since s->mapping was possibly realloc()ed */ |
Markus Armbruster | d4df3db | 2014-08-19 10:31:11 +0200 | [diff] [blame] | 887 | mapping = array_get(&(s->mapping), mapping_index); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 888 | first_cluster += (s->directory.next - mapping->info.dir.first_dir_index) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 889 | * 0x20 / s->cluster_size; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 890 | mapping->end = first_cluster; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 891 | |
Markus Armbruster | d4df3db | 2014-08-19 10:31:11 +0200 | [diff] [blame] | 892 | direntry = array_get(&(s->directory), mapping->dir_index); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 893 | set_begin_of_direntry(direntry, mapping->begin); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 894 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 895 | return 0; |
| 896 | } |
| 897 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 898 | static inline uint32_t sector2cluster(BDRVVVFATState* s,off_t sector_num) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 899 | { |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 900 | return (sector_num - s->offset_to_root_dir) / s->sectors_per_cluster; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 901 | } |
| 902 | |
| 903 | static inline off_t cluster2sector(BDRVVVFATState* s, uint32_t cluster_num) |
| 904 | { |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 905 | return s->offset_to_root_dir + s->sectors_per_cluster * cluster_num; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 906 | } |
| 907 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 908 | static int init_directories(BDRVVVFATState* s, |
Markus Armbruster | d11c891 | 2014-05-16 11:00:18 +0200 | [diff] [blame] | 909 | const char *dirname, int heads, int secs, |
| 910 | Error **errp) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 911 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 912 | bootsector_t* bootsector; |
| 913 | mapping_t* mapping; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 914 | unsigned int i; |
| 915 | unsigned int cluster; |
| 916 | |
| 917 | memset(&(s->first_sectors[0]),0,0x40*0x200); |
| 918 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 919 | s->cluster_size=s->sectors_per_cluster*0x200; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 920 | s->cluster_buffer=g_malloc(s->cluster_size); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 921 | |
| 922 | /* |
| 923 | * The formula: sc = spf+1+spf*spc*(512*8/fat_type), |
| 924 | * where sc is sector_count, |
| 925 | * spf is sectors_per_fat, |
| 926 | * spc is sectors_per_clusters, and |
| 927 | * fat_type = 12, 16 or 32. |
| 928 | */ |
| 929 | i = 1+s->sectors_per_cluster*0x200*8/s->fat_type; |
| 930 | s->sectors_per_fat=(s->sector_count+i)/i; /* round up */ |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 931 | |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 932 | s->offset_to_fat = s->offset_to_bootsector + 1; |
| 933 | s->offset_to_root_dir = s->offset_to_fat + s->sectors_per_fat * 2; |
| 934 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 935 | array_init(&(s->mapping),sizeof(mapping_t)); |
| 936 | array_init(&(s->directory),sizeof(direntry_t)); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 937 | |
| 938 | /* add volume label */ |
| 939 | { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 940 | direntry_t* entry=array_get_next(&(s->directory)); |
| 941 | entry->attributes=0x28; /* archive | volume label */ |
Wolfgang Bumiller | d5941dd | 2015-06-19 11:35:29 +0200 | [diff] [blame] | 942 | memcpy(entry->name, s->volume_label, sizeof(entry->name)); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 943 | } |
| 944 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 945 | /* Now build FAT, and write back information into directory */ |
| 946 | init_fat(s); |
| 947 | |
Hervé Poussineau | 6817efe | 2017-05-22 23:12:03 +0200 | [diff] [blame] | 948 | /* TODO: if there are more entries, bootsector has to be adjusted! */ |
| 949 | s->root_entries = 0x02 * 0x10 * s->sectors_per_cluster; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 950 | s->cluster_count=sector2cluster(s, s->sector_count); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 951 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 952 | mapping = array_get_next(&(s->mapping)); |
| 953 | mapping->begin = 0; |
| 954 | mapping->dir_index = 0; |
| 955 | mapping->info.dir.parent_mapping_index = -1; |
| 956 | mapping->first_mapping_index = -1; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 957 | mapping->path = g_strdup(dirname); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 958 | i = strlen(mapping->path); |
| 959 | if (i > 0 && mapping->path[i - 1] == '/') |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 960 | mapping->path[i - 1] = '\0'; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 961 | mapping->mode = MODE_DIRECTORY; |
| 962 | mapping->read_only = 0; |
| 963 | s->path = mapping->path; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 964 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 965 | for (i = 0, cluster = 0; i < s->mapping.next; i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 966 | /* MS-DOS expects the FAT to be 0 for the root directory |
| 967 | * (except for the media byte). */ |
| 968 | /* LATER TODO: still true for FAT32? */ |
| 969 | int fix_fat = (i != 0); |
| 970 | mapping = array_get(&(s->mapping), i); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 971 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 972 | if (mapping->mode & MODE_DIRECTORY) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 973 | mapping->begin = cluster; |
| 974 | if(read_directory(s, i)) { |
Markus Armbruster | d11c891 | 2014-05-16 11:00:18 +0200 | [diff] [blame] | 975 | error_setg(errp, "Could not read directory %s", |
| 976 | mapping->path); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 977 | return -1; |
| 978 | } |
| 979 | mapping = array_get(&(s->mapping), i); |
| 980 | } else { |
| 981 | assert(mapping->mode == MODE_UNDEFINED); |
| 982 | mapping->mode=MODE_NORMAL; |
| 983 | mapping->begin = cluster; |
| 984 | if (mapping->end > 0) { |
| 985 | direntry_t* direntry = array_get(&(s->directory), |
| 986 | mapping->dir_index); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 987 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 988 | mapping->end = cluster + 1 + (mapping->end-1)/s->cluster_size; |
| 989 | set_begin_of_direntry(direntry, mapping->begin); |
| 990 | } else { |
| 991 | mapping->end = cluster + 1; |
| 992 | fix_fat = 0; |
| 993 | } |
| 994 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 995 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 996 | assert(mapping->begin < mapping->end); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 997 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 998 | /* next free cluster */ |
| 999 | cluster = mapping->end; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1000 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1001 | if(cluster > s->cluster_count) { |
Markus Armbruster | d11c891 | 2014-05-16 11:00:18 +0200 | [diff] [blame] | 1002 | error_setg(errp, |
| 1003 | "Directory does not fit in FAT%d (capacity %.2f MB)", |
| 1004 | s->fat_type, s->sector_count / 2000.0); |
| 1005 | return -1; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1006 | } |
balrog | 8ce0f86 | 2008-11-10 01:34:27 +0000 | [diff] [blame] | 1007 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1008 | /* fix fat for entry */ |
| 1009 | if (fix_fat) { |
| 1010 | int j; |
| 1011 | for(j = mapping->begin; j < mapping->end - 1; j++) |
| 1012 | fat_set(s, j, j+1); |
| 1013 | fat_set(s, mapping->end - 1, s->max_fat_value); |
| 1014 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1015 | } |
| 1016 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1017 | mapping = array_get(&(s->mapping), 0); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1018 | s->last_cluster_of_root_directory = mapping->end; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1019 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1020 | /* the FAT signature */ |
| 1021 | fat_set(s,0,s->max_fat_value); |
| 1022 | fat_set(s,1,s->max_fat_value); |
| 1023 | |
| 1024 | s->current_mapping = NULL; |
| 1025 | |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 1026 | bootsector = (bootsector_t *)(s->first_sectors |
| 1027 | + s->offset_to_bootsector * 0x200); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1028 | bootsector->jump[0]=0xeb; |
| 1029 | bootsector->jump[1]=0x3e; |
| 1030 | bootsector->jump[2]=0x90; |
Hervé Poussineau | 63d261c | 2017-07-15 15:28:39 +0200 | [diff] [blame] | 1031 | memcpy(bootsector->name, BOOTSECTOR_OEM_NAME, 8); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1032 | bootsector->sector_size=cpu_to_le16(0x200); |
| 1033 | bootsector->sectors_per_cluster=s->sectors_per_cluster; |
| 1034 | bootsector->reserved_sectors=cpu_to_le16(1); |
| 1035 | bootsector->number_of_fats=0x2; /* number of FATs */ |
Hervé Poussineau | 6817efe | 2017-05-22 23:12:03 +0200 | [diff] [blame] | 1036 | bootsector->root_entries = cpu_to_le16(s->root_entries); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1037 | bootsector->total_sectors16=s->sector_count>0xffff?0:cpu_to_le16(s->sector_count); |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 1038 | /* media descriptor: hard disk=0xf8, floppy=0xf0 */ |
| 1039 | bootsector->media_type = (s->offset_to_bootsector > 0 ? 0xf8 : 0xf0); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1040 | s->fat.pointer[0] = bootsector->media_type; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1041 | bootsector->sectors_per_fat=cpu_to_le16(s->sectors_per_fat); |
Markus Armbruster | 4480e0f | 2012-07-10 11:12:29 +0200 | [diff] [blame] | 1042 | bootsector->sectors_per_track = cpu_to_le16(secs); |
| 1043 | bootsector->number_of_heads = cpu_to_le16(heads); |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 1044 | bootsector->hidden_sectors = cpu_to_le32(s->offset_to_bootsector); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1045 | bootsector->total_sectors=cpu_to_le32(s->sector_count>0xffff?s->sector_count:0); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1046 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1047 | /* LATER TODO: if FAT32, this is wrong */ |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 1048 | /* drive_number: fda=0, hda=0x80 */ |
| 1049 | bootsector->u.fat16.drive_number = s->offset_to_bootsector == 0 ? 0 : 0x80; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1050 | bootsector->u.fat16.signature=0x29; |
| 1051 | bootsector->u.fat16.id=cpu_to_le32(0xfabe1afd); |
| 1052 | |
Wolfgang Bumiller | d5941dd | 2015-06-19 11:35:29 +0200 | [diff] [blame] | 1053 | memcpy(bootsector->u.fat16.volume_label, s->volume_label, |
| 1054 | sizeof(bootsector->u.fat16.volume_label)); |
Hervé Poussineau | 92e28d8 | 2017-05-22 23:11:58 +0200 | [diff] [blame] | 1055 | memcpy(bootsector->u.fat16.fat_type, |
| 1056 | s->fat_type == 12 ? "FAT12 " : "FAT16 ", 8); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1057 | bootsector->magic[0]=0x55; bootsector->magic[1]=0xaa; |
| 1058 | |
| 1059 | return 0; |
| 1060 | } |
| 1061 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1062 | #ifdef DEBUG |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1063 | static BDRVVVFATState *vvv = NULL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1064 | #endif |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1065 | |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 1066 | static int enable_write_target(BlockDriverState *bs, Error **errp); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1067 | static int is_consistent(BDRVVVFATState *s); |
| 1068 | |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1069 | static QemuOptsList runtime_opts = { |
| 1070 | .name = "vvfat", |
| 1071 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), |
| 1072 | .desc = { |
| 1073 | { |
| 1074 | .name = "dir", |
| 1075 | .type = QEMU_OPT_STRING, |
| 1076 | .help = "Host directory to map to the vvfat device", |
| 1077 | }, |
| 1078 | { |
| 1079 | .name = "fat-type", |
| 1080 | .type = QEMU_OPT_NUMBER, |
| 1081 | .help = "FAT type (12, 16 or 32)", |
| 1082 | }, |
| 1083 | { |
| 1084 | .name = "floppy", |
| 1085 | .type = QEMU_OPT_BOOL, |
| 1086 | .help = "Create a floppy rather than a hard disk image", |
| 1087 | }, |
| 1088 | { |
Wolfgang Bumiller | d5941dd | 2015-06-19 11:35:29 +0200 | [diff] [blame] | 1089 | .name = "label", |
| 1090 | .type = QEMU_OPT_STRING, |
| 1091 | .help = "Use a volume label other than QEMU VVFAT", |
| 1092 | }, |
| 1093 | { |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1094 | .name = "rw", |
| 1095 | .type = QEMU_OPT_BOOL, |
| 1096 | .help = "Make the image writable", |
| 1097 | }, |
| 1098 | { /* end of list */ } |
| 1099 | }, |
| 1100 | }; |
| 1101 | |
| 1102 | static void vvfat_parse_filename(const char *filename, QDict *options, |
| 1103 | Error **errp) |
| 1104 | { |
| 1105 | int fat_type = 0; |
| 1106 | bool floppy = false; |
| 1107 | bool rw = false; |
| 1108 | int i; |
| 1109 | |
| 1110 | if (!strstart(filename, "fat:", NULL)) { |
| 1111 | error_setg(errp, "File name string must start with 'fat:'"); |
| 1112 | return; |
| 1113 | } |
| 1114 | |
| 1115 | /* Parse options */ |
| 1116 | if (strstr(filename, ":32:")) { |
| 1117 | fat_type = 32; |
| 1118 | } else if (strstr(filename, ":16:")) { |
| 1119 | fat_type = 16; |
| 1120 | } else if (strstr(filename, ":12:")) { |
| 1121 | fat_type = 12; |
| 1122 | } |
| 1123 | |
| 1124 | if (strstr(filename, ":floppy:")) { |
| 1125 | floppy = true; |
| 1126 | } |
| 1127 | |
| 1128 | if (strstr(filename, ":rw:")) { |
| 1129 | rw = true; |
| 1130 | } |
| 1131 | |
| 1132 | /* Get the directory name without options */ |
| 1133 | i = strrchr(filename, ':') - filename; |
| 1134 | assert(i >= 3); |
| 1135 | if (filename[i - 2] == ':' && qemu_isalpha(filename[i - 1])) { |
| 1136 | /* workaround for DOS drive names */ |
| 1137 | filename += i - 1; |
| 1138 | } else { |
| 1139 | filename += i + 1; |
| 1140 | } |
| 1141 | |
| 1142 | /* Fill in the options QDict */ |
Eric Blake | 46f5ac2 | 2017-04-27 16:58:17 -0500 | [diff] [blame] | 1143 | qdict_put_str(options, "dir", filename); |
| 1144 | qdict_put_int(options, "fat-type", fat_type); |
| 1145 | qdict_put_bool(options, "floppy", floppy); |
| 1146 | qdict_put_bool(options, "rw", rw); |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1147 | } |
| 1148 | |
Max Reitz | 015a103 | 2013-09-05 14:22:29 +0200 | [diff] [blame] | 1149 | static int vvfat_open(BlockDriverState *bs, QDict *options, int flags, |
| 1150 | Error **errp) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1151 | { |
| 1152 | BDRVVVFATState *s = bs->opaque; |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1153 | int cyls, heads, secs; |
| 1154 | bool floppy; |
Wolfgang Bumiller | d5941dd | 2015-06-19 11:35:29 +0200 | [diff] [blame] | 1155 | const char *dirname, *label; |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1156 | QemuOpts *opts; |
| 1157 | Error *local_err = NULL; |
| 1158 | int ret; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1159 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1160 | #ifdef DEBUG |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1161 | vvv = s; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1162 | #endif |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1163 | |
Peter Crosthwaite | 87ea75d | 2014-01-01 18:49:17 -0800 | [diff] [blame] | 1164 | opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1165 | qemu_opts_absorb_qdict(opts, options, &local_err); |
Markus Armbruster | 84d18f0 | 2014-01-30 15:07:28 +0100 | [diff] [blame] | 1166 | if (local_err) { |
Paolo Bonzini | c0f92b5 | 2014-02-17 14:44:01 +0100 | [diff] [blame] | 1167 | error_propagate(errp, local_err); |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1168 | ret = -EINVAL; |
| 1169 | goto fail; |
| 1170 | } |
| 1171 | |
| 1172 | dirname = qemu_opt_get(opts, "dir"); |
| 1173 | if (!dirname) { |
Paolo Bonzini | c0f92b5 | 2014-02-17 14:44:01 +0100 | [diff] [blame] | 1174 | error_setg(errp, "vvfat block driver requires a 'dir' option"); |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1175 | ret = -EINVAL; |
| 1176 | goto fail; |
| 1177 | } |
| 1178 | |
| 1179 | s->fat_type = qemu_opt_get_number(opts, "fat-type", 0); |
| 1180 | floppy = qemu_opt_get_bool(opts, "floppy", false); |
| 1181 | |
Wolfgang Bumiller | d5941dd | 2015-06-19 11:35:29 +0200 | [diff] [blame] | 1182 | memset(s->volume_label, ' ', sizeof(s->volume_label)); |
| 1183 | label = qemu_opt_get(opts, "label"); |
| 1184 | if (label) { |
| 1185 | size_t label_length = strlen(label); |
| 1186 | if (label_length > 11) { |
| 1187 | error_setg(errp, "vvfat label cannot be longer than 11 bytes"); |
| 1188 | ret = -EINVAL; |
| 1189 | goto fail; |
| 1190 | } |
| 1191 | memcpy(s->volume_label, label, label_length); |
Kevin Wolf | d208c50 | 2016-04-27 14:18:16 +0200 | [diff] [blame] | 1192 | } else { |
| 1193 | memcpy(s->volume_label, "QEMU VVFAT", 10); |
Wolfgang Bumiller | d5941dd | 2015-06-19 11:35:29 +0200 | [diff] [blame] | 1194 | } |
| 1195 | |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1196 | if (floppy) { |
| 1197 | /* 1.44MB or 2.88MB floppy. 2.88MB can be FAT12 (default) or FAT16. */ |
| 1198 | if (!s->fat_type) { |
| 1199 | s->fat_type = 12; |
| 1200 | secs = 36; |
| 1201 | s->sectors_per_cluster = 2; |
| 1202 | } else { |
| 1203 | secs = s->fat_type == 12 ? 18 : 36; |
| 1204 | s->sectors_per_cluster = 1; |
| 1205 | } |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1206 | cyls = 80; |
| 1207 | heads = 2; |
| 1208 | } else { |
| 1209 | /* 32MB or 504MB disk*/ |
| 1210 | if (!s->fat_type) { |
| 1211 | s->fat_type = 16; |
| 1212 | } |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 1213 | s->offset_to_bootsector = 0x3f; |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1214 | cyls = s->fat_type == 12 ? 64 : 1024; |
| 1215 | heads = 16; |
| 1216 | secs = 63; |
| 1217 | } |
| 1218 | |
| 1219 | switch (s->fat_type) { |
| 1220 | case 32: |
Alistair Francis | b62e39b | 2017-09-11 12:52:56 -0700 | [diff] [blame] | 1221 | warn_report("FAT32 has not been tested. You are welcome to do so!"); |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1222 | break; |
| 1223 | case 16: |
| 1224 | case 12: |
| 1225 | break; |
| 1226 | default: |
Paolo Bonzini | c0f92b5 | 2014-02-17 14:44:01 +0100 | [diff] [blame] | 1227 | error_setg(errp, "Valid FAT types are only 12, 16 and 32"); |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1228 | ret = -EINVAL; |
| 1229 | goto fail; |
| 1230 | } |
| 1231 | |
| 1232 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1233 | s->bs = bs; |
| 1234 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1235 | /* LATER TODO: if FAT32, adjust */ |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1236 | s->sectors_per_cluster=0x10; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1237 | |
| 1238 | s->current_cluster=0xffffffff; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1239 | |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 1240 | s->qcow = NULL; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1241 | s->qcow_filename = NULL; |
| 1242 | s->fat2 = NULL; |
| 1243 | s->downcase_short_names = 1; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 1244 | |
Markus Armbruster | 4480e0f | 2012-07-10 11:12:29 +0200 | [diff] [blame] | 1245 | fprintf(stderr, "vvfat %s chs %d,%d,%d\n", |
| 1246 | dirname, cyls, heads, secs); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1247 | |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 1248 | s->sector_count = cyls * heads * secs - s->offset_to_bootsector; |
Paolo Bonzini | 5a742b5 | 2011-10-05 09:12:06 +0200 | [diff] [blame] | 1249 | |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1250 | if (qemu_opt_get_bool(opts, "rw", false)) { |
Jeff Cody | e2b8247 | 2017-04-07 16:55:26 -0400 | [diff] [blame] | 1251 | if (!bdrv_is_read_only(bs)) { |
| 1252 | ret = enable_write_target(bs, errp); |
| 1253 | if (ret < 0) { |
| 1254 | goto fail; |
| 1255 | } |
| 1256 | } else { |
| 1257 | ret = -EPERM; |
| 1258 | error_setg(errp, |
| 1259 | "Unable to set VVFAT to 'rw' when drive is read-only"); |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1260 | goto fail; |
| 1261 | } |
Jeff Cody | e2b8247 | 2017-04-07 16:55:26 -0400 | [diff] [blame] | 1262 | } else { |
| 1263 | /* read only is the default for safety */ |
| 1264 | ret = bdrv_set_read_only(bs, true, &local_err); |
| 1265 | if (ret < 0) { |
| 1266 | error_propagate(errp, local_err); |
| 1267 | goto fail; |
| 1268 | } |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 1269 | } |
| 1270 | |
Markus Armbruster | 4480e0f | 2012-07-10 11:12:29 +0200 | [diff] [blame] | 1271 | bs->total_sectors = cyls * heads * secs; |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 1272 | |
Markus Armbruster | d11c891 | 2014-05-16 11:00:18 +0200 | [diff] [blame] | 1273 | if (init_directories(s, dirname, heads, secs, errp)) { |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1274 | ret = -EIO; |
| 1275 | goto fail; |
Markus Armbruster | 4480e0f | 2012-07-10 11:12:29 +0200 | [diff] [blame] | 1276 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1277 | |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 1278 | s->sector_count = s->offset_to_root_dir |
| 1279 | + s->sectors_per_cluster * s->cluster_count; |
ths | b570094 | 2007-09-25 14:47:03 +0000 | [diff] [blame] | 1280 | |
Kevin Wolf | 3397f0c | 2011-11-22 16:52:13 +0100 | [diff] [blame] | 1281 | /* Disable migration when vvfat is used rw */ |
| 1282 | if (s->qcow) { |
Alberto Garcia | 81e5f78 | 2015-04-08 12:29:19 +0300 | [diff] [blame] | 1283 | error_setg(&s->migration_blocker, |
| 1284 | "The vvfat (rw) format used by node '%s' " |
| 1285 | "does not support live migration", |
| 1286 | bdrv_get_device_or_node_name(bs)); |
Ashijeet Acharya | fe44dc9 | 2017-01-16 17:01:53 +0530 | [diff] [blame] | 1287 | ret = migrate_add_blocker(s->migration_blocker, &local_err); |
| 1288 | if (local_err) { |
| 1289 | error_propagate(errp, local_err); |
| 1290 | error_free(s->migration_blocker); |
| 1291 | goto fail; |
| 1292 | } |
Kevin Wolf | 3397f0c | 2011-11-22 16:52:13 +0100 | [diff] [blame] | 1293 | } |
| 1294 | |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 1295 | if (s->offset_to_bootsector > 0) { |
Ashijeet Acharya | fe44dc9 | 2017-01-16 17:01:53 +0530 | [diff] [blame] | 1296 | init_mbr(s, cyls, heads, secs); |
| 1297 | } |
| 1298 | |
| 1299 | qemu_co_mutex_init(&s->lock); |
| 1300 | |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 1301 | ret = 0; |
| 1302 | fail: |
| 1303 | qemu_opts_del(opts); |
| 1304 | return ret; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1305 | } |
| 1306 | |
Eric Blake | a650648 | 2016-06-23 16:37:17 -0600 | [diff] [blame] | 1307 | static void vvfat_refresh_limits(BlockDriverState *bs, Error **errp) |
| 1308 | { |
Eric Blake | a5b8dd2 | 2016-06-23 16:37:24 -0600 | [diff] [blame] | 1309 | bs->bl.request_alignment = BDRV_SECTOR_SIZE; /* No sub-sector I/O */ |
Eric Blake | a650648 | 2016-06-23 16:37:17 -0600 | [diff] [blame] | 1310 | } |
| 1311 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1312 | static inline void vvfat_close_current_file(BDRVVVFATState *s) |
| 1313 | { |
| 1314 | if(s->current_mapping) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1315 | s->current_mapping = NULL; |
| 1316 | if (s->current_fd) { |
| 1317 | qemu_close(s->current_fd); |
| 1318 | s->current_fd = 0; |
| 1319 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1320 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1321 | s->current_cluster = -1; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1322 | } |
| 1323 | |
| 1324 | /* mappings between index1 and index2-1 are supposed to be ordered |
| 1325 | * return value is the index of the last mapping for which end>cluster_num |
| 1326 | */ |
| 1327 | static inline int find_mapping_for_cluster_aux(BDRVVVFATState* s,int cluster_num,int index1,int index2) |
| 1328 | { |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1329 | while(1) { |
Blue Swirl | 88bf795 | 2010-04-25 15:27:14 +0000 | [diff] [blame] | 1330 | int index3; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1331 | mapping_t* mapping; |
| 1332 | index3=(index1+index2)/2; |
| 1333 | mapping=array_get(&(s->mapping),index3); |
| 1334 | assert(mapping->begin < mapping->end); |
| 1335 | if(mapping->begin>=cluster_num) { |
| 1336 | assert(index2!=index3 || index2==0); |
| 1337 | if(index2==index3) |
| 1338 | return index1; |
| 1339 | index2=index3; |
| 1340 | } else { |
| 1341 | if(index1==index3) |
| 1342 | return mapping->end<=cluster_num ? index2 : index1; |
| 1343 | index1=index3; |
| 1344 | } |
| 1345 | assert(index1<=index2); |
| 1346 | DLOG(mapping=array_get(&(s->mapping),index1); |
| 1347 | assert(mapping->begin<=cluster_num); |
| 1348 | assert(index2 >= s->mapping.next || |
| 1349 | ((mapping = array_get(&(s->mapping),index2)) && |
| 1350 | mapping->end>cluster_num))); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1351 | } |
| 1352 | } |
| 1353 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1354 | static inline mapping_t* find_mapping_for_cluster(BDRVVVFATState* s,int cluster_num) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1355 | { |
| 1356 | int index=find_mapping_for_cluster_aux(s,cluster_num,0,s->mapping.next); |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1357 | mapping_t* mapping; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1358 | if(index>=s->mapping.next) |
blueswir1 | 511d2b1 | 2009-03-07 15:32:56 +0000 | [diff] [blame] | 1359 | return NULL; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1360 | mapping=array_get(&(s->mapping),index); |
| 1361 | if(mapping->begin>cluster_num) |
blueswir1 | 511d2b1 | 2009-03-07 15:32:56 +0000 | [diff] [blame] | 1362 | return NULL; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1363 | assert(mapping->begin<=cluster_num && mapping->end>cluster_num); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1364 | return mapping; |
| 1365 | } |
| 1366 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1367 | static int open_file(BDRVVVFATState* s,mapping_t* mapping) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1368 | { |
| 1369 | if(!mapping) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1370 | return -1; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1371 | if(!s->current_mapping || |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1372 | strcmp(s->current_mapping->path,mapping->path)) { |
| 1373 | /* open file */ |
| 1374 | int fd = qemu_open(mapping->path, O_RDONLY | O_BINARY | O_LARGEFILE); |
| 1375 | if(fd<0) |
| 1376 | return -1; |
| 1377 | vvfat_close_current_file(s); |
| 1378 | s->current_fd = fd; |
| 1379 | s->current_mapping = mapping; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1380 | } |
| 1381 | return 0; |
| 1382 | } |
| 1383 | |
| 1384 | static inline int read_cluster(BDRVVVFATState *s,int cluster_num) |
| 1385 | { |
| 1386 | if(s->current_cluster != cluster_num) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1387 | int result=0; |
| 1388 | off_t offset; |
| 1389 | assert(!s->current_mapping || s->current_fd || (s->current_mapping->mode & MODE_DIRECTORY)); |
| 1390 | if(!s->current_mapping |
| 1391 | || s->current_mapping->begin>cluster_num |
| 1392 | || s->current_mapping->end<=cluster_num) { |
| 1393 | /* binary search of mappings for file */ |
| 1394 | mapping_t* mapping=find_mapping_for_cluster(s,cluster_num); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1395 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1396 | assert(!mapping || (cluster_num>=mapping->begin && cluster_num<mapping->end)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1397 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1398 | if (mapping && mapping->mode & MODE_DIRECTORY) { |
| 1399 | vvfat_close_current_file(s); |
| 1400 | s->current_mapping = mapping; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1401 | read_cluster_directory: |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1402 | offset = s->cluster_size*(cluster_num-s->current_mapping->begin); |
| 1403 | s->cluster = (unsigned char*)s->directory.pointer+offset |
| 1404 | + 0x20*s->current_mapping->info.dir.first_dir_index; |
| 1405 | assert(((s->cluster-(unsigned char*)s->directory.pointer)%s->cluster_size)==0); |
| 1406 | assert((char*)s->cluster+s->cluster_size <= s->directory.pointer+s->directory.next*s->directory.item_size); |
| 1407 | s->current_cluster = cluster_num; |
| 1408 | return 0; |
| 1409 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1410 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1411 | if(open_file(s,mapping)) |
| 1412 | return -2; |
| 1413 | } else if (s->current_mapping->mode & MODE_DIRECTORY) |
| 1414 | goto read_cluster_directory; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1415 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1416 | assert(s->current_fd); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1417 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1418 | offset=s->cluster_size*(cluster_num-s->current_mapping->begin)+s->current_mapping->info.file.offset; |
| 1419 | if(lseek(s->current_fd, offset, SEEK_SET)!=offset) |
| 1420 | return -3; |
| 1421 | s->cluster=s->cluster_buffer; |
| 1422 | result=read(s->current_fd,s->cluster,s->cluster_size); |
| 1423 | if(result<0) { |
| 1424 | s->current_cluster = -1; |
| 1425 | return -1; |
| 1426 | } |
| 1427 | s->current_cluster = cluster_num; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1428 | } |
| 1429 | return 0; |
| 1430 | } |
| 1431 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1432 | #ifdef DEBUG |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1433 | static void print_direntry(const direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1434 | { |
| 1435 | int j = 0; |
| 1436 | char buffer[1024]; |
| 1437 | |
Kevin Wolf | 3e89cb0 | 2010-05-20 10:34:50 +0200 | [diff] [blame] | 1438 | fprintf(stderr, "direntry %p: ", direntry); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1439 | if(!direntry) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1440 | return; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1441 | if(is_long_name(direntry)) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1442 | unsigned char* c=(unsigned char*)direntry; |
| 1443 | int i; |
| 1444 | for(i=1;i<11 && c[i] && c[i]!=0xff;i+=2) |
blueswir1 | 3891b37 | 2008-12-14 09:30:41 +0000 | [diff] [blame] | 1445 | #define ADD_CHAR(c) {buffer[j] = (c); if (buffer[j] < ' ') buffer[j] = 0xb0; j++;} |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1446 | ADD_CHAR(c[i]); |
| 1447 | for(i=14;i<26 && c[i] && c[i]!=0xff;i+=2) |
| 1448 | ADD_CHAR(c[i]); |
| 1449 | for(i=28;i<32 && c[i] && c[i]!=0xff;i+=2) |
| 1450 | ADD_CHAR(c[i]); |
| 1451 | buffer[j] = 0; |
| 1452 | fprintf(stderr, "%s\n", buffer); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1453 | } else { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1454 | int i; |
| 1455 | for(i=0;i<11;i++) |
| 1456 | ADD_CHAR(direntry->name[i]); |
| 1457 | buffer[j] = 0; |
| 1458 | fprintf(stderr,"%s attributes=0x%02x begin=%d size=%d\n", |
| 1459 | buffer, |
| 1460 | direntry->attributes, |
| 1461 | begin_of_direntry(direntry),le32_to_cpu(direntry->size)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1462 | } |
| 1463 | } |
| 1464 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1465 | static void print_mapping(const mapping_t* mapping) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1466 | { |
Kevin Wolf | 3e89cb0 | 2010-05-20 10:34:50 +0200 | [diff] [blame] | 1467 | fprintf(stderr, "mapping (%p): begin, end = %d, %d, dir_index = %d, " |
| 1468 | "first_mapping_index = %d, name = %s, mode = 0x%x, " , |
| 1469 | mapping, mapping->begin, mapping->end, mapping->dir_index, |
| 1470 | mapping->first_mapping_index, mapping->path, mapping->mode); |
| 1471 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1472 | if (mapping->mode & MODE_DIRECTORY) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1473 | fprintf(stderr, "parent_mapping_index = %d, first_dir_index = %d\n", mapping->info.dir.parent_mapping_index, mapping->info.dir.first_dir_index); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1474 | else |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1475 | fprintf(stderr, "offset = %d\n", mapping->info.file.offset); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1476 | } |
| 1477 | #endif |
| 1478 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1479 | static int vvfat_read(BlockDriverState *bs, int64_t sector_num, |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1480 | uint8_t *buf, int nb_sectors) |
| 1481 | { |
| 1482 | BDRVVVFATState *s = bs->opaque; |
| 1483 | int i; |
| 1484 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1485 | for(i=0;i<nb_sectors;i++,sector_num++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1486 | if (sector_num >= bs->total_sectors) |
| 1487 | return -1; |
| 1488 | if (s->qcow) { |
Eric Blake | d6a644b | 2017-07-07 07:44:57 -0500 | [diff] [blame] | 1489 | int64_t n; |
Eric Blake | 6f712ee | 2017-03-08 15:34:28 -0600 | [diff] [blame] | 1490 | int ret; |
Eric Blake | d6a644b | 2017-07-07 07:44:57 -0500 | [diff] [blame] | 1491 | ret = bdrv_is_allocated(s->qcow->bs, sector_num * BDRV_SECTOR_SIZE, |
| 1492 | (nb_sectors - i) * BDRV_SECTOR_SIZE, &n); |
Eric Blake | 6f712ee | 2017-03-08 15:34:28 -0600 | [diff] [blame] | 1493 | if (ret < 0) { |
| 1494 | return ret; |
| 1495 | } |
| 1496 | if (ret) { |
Eric Blake | d6a644b | 2017-07-07 07:44:57 -0500 | [diff] [blame] | 1497 | DLOG(fprintf(stderr, "sectors %" PRId64 "+%" PRId64 |
| 1498 | " allocated\n", sector_num, |
| 1499 | n >> BDRV_SECTOR_BITS)); |
| 1500 | if (bdrv_read(s->qcow, sector_num, buf + i * 0x200, |
| 1501 | n >> BDRV_SECTOR_BITS)) { |
Kevin Wolf | 7704df9 | 2011-11-08 10:50:12 +0100 | [diff] [blame] | 1502 | return -1; |
| 1503 | } |
Eric Blake | d6a644b | 2017-07-07 07:44:57 -0500 | [diff] [blame] | 1504 | i += (n >> BDRV_SECTOR_BITS) - 1; |
| 1505 | sector_num += (n >> BDRV_SECTOR_BITS) - 1; |
Kevin Wolf | 7704df9 | 2011-11-08 10:50:12 +0100 | [diff] [blame] | 1506 | continue; |
| 1507 | } |
Eric Blake | d6a644b | 2017-07-07 07:44:57 -0500 | [diff] [blame] | 1508 | DLOG(fprintf(stderr, "sector %" PRId64 " not allocated\n", |
| 1509 | sector_num)); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1510 | } |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 1511 | if (sector_num < s->offset_to_root_dir) { |
| 1512 | if (sector_num < s->offset_to_fat) { |
| 1513 | memcpy(buf + i * 0x200, |
| 1514 | &(s->first_sectors[sector_num * 0x200]), |
| 1515 | 0x200); |
| 1516 | } else if (sector_num < s->offset_to_fat + s->sectors_per_fat) { |
| 1517 | memcpy(buf + i * 0x200, |
| 1518 | &(s->fat.pointer[(sector_num |
| 1519 | - s->offset_to_fat) * 0x200]), |
| 1520 | 0x200); |
| 1521 | } else if (sector_num < s->offset_to_root_dir) { |
| 1522 | memcpy(buf + i * 0x200, |
| 1523 | &(s->fat.pointer[(sector_num - s->offset_to_fat |
| 1524 | - s->sectors_per_fat) * 0x200]), |
| 1525 | 0x200); |
| 1526 | } |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1527 | } else { |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 1528 | uint32_t sector = sector_num - s->offset_to_root_dir, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1529 | sector_offset_in_cluster=(sector%s->sectors_per_cluster), |
| 1530 | cluster_num=sector/s->sectors_per_cluster; |
| 1531 | if(cluster_num > s->cluster_count || read_cluster(s, cluster_num) != 0) { |
| 1532 | /* LATER TODO: strict: return -1; */ |
| 1533 | memset(buf+i*0x200,0,0x200); |
| 1534 | continue; |
| 1535 | } |
| 1536 | memcpy(buf+i*0x200,s->cluster+sector_offset_in_cluster*0x200,0x200); |
| 1537 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1538 | } |
| 1539 | return 0; |
| 1540 | } |
| 1541 | |
Kevin Wolf | 4575eb4 | 2016-04-26 17:14:08 +0200 | [diff] [blame] | 1542 | static int coroutine_fn |
| 1543 | vvfat_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes, |
| 1544 | QEMUIOVector *qiov, int flags) |
Paolo Bonzini | 2914caa | 2011-10-20 13:16:22 +0200 | [diff] [blame] | 1545 | { |
| 1546 | int ret; |
| 1547 | BDRVVVFATState *s = bs->opaque; |
Kevin Wolf | 4575eb4 | 2016-04-26 17:14:08 +0200 | [diff] [blame] | 1548 | uint64_t sector_num = offset >> BDRV_SECTOR_BITS; |
| 1549 | int nb_sectors = bytes >> BDRV_SECTOR_BITS; |
| 1550 | void *buf; |
| 1551 | |
| 1552 | assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0); |
| 1553 | assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0); |
| 1554 | |
| 1555 | buf = g_try_malloc(bytes); |
| 1556 | if (bytes && buf == NULL) { |
| 1557 | return -ENOMEM; |
| 1558 | } |
| 1559 | |
Paolo Bonzini | 2914caa | 2011-10-20 13:16:22 +0200 | [diff] [blame] | 1560 | qemu_co_mutex_lock(&s->lock); |
| 1561 | ret = vvfat_read(bs, sector_num, buf, nb_sectors); |
| 1562 | qemu_co_mutex_unlock(&s->lock); |
Kevin Wolf | 4575eb4 | 2016-04-26 17:14:08 +0200 | [diff] [blame] | 1563 | |
| 1564 | qemu_iovec_from_buf(qiov, 0, buf, bytes); |
| 1565 | g_free(buf); |
| 1566 | |
Paolo Bonzini | 2914caa | 2011-10-20 13:16:22 +0200 | [diff] [blame] | 1567 | return ret; |
| 1568 | } |
| 1569 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1570 | /* LATER TODO: statify all functions */ |
| 1571 | |
| 1572 | /* |
| 1573 | * Idea of the write support (use snapshot): |
| 1574 | * |
| 1575 | * 1. check if all data is consistent, recording renames, modifications, |
| 1576 | * new files and directories (in s->commits). |
| 1577 | * |
| 1578 | * 2. if the data is not consistent, stop committing |
| 1579 | * |
| 1580 | * 3. handle renames, and create new files and directories (do not yet |
| 1581 | * write their contents) |
| 1582 | * |
| 1583 | * 4. walk the directories, fixing the mapping and direntries, and marking |
| 1584 | * the handled mappings as not deleted |
| 1585 | * |
| 1586 | * 5. commit the contents of the files |
| 1587 | * |
| 1588 | * 6. handle deleted files and directories |
| 1589 | * |
| 1590 | */ |
| 1591 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1592 | typedef struct commit_t { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1593 | char* path; |
| 1594 | union { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1595 | struct { uint32_t cluster; } rename; |
| 1596 | struct { int dir_index; uint32_t modified_offset; } writeout; |
| 1597 | struct { uint32_t first_cluster; } new_file; |
| 1598 | struct { uint32_t cluster; } mkdir; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1599 | } param; |
| 1600 | /* DELETEs and RMDIRs are handled differently: see handle_deletes() */ |
| 1601 | enum { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1602 | ACTION_RENAME, ACTION_WRITEOUT, ACTION_NEW_FILE, ACTION_MKDIR |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1603 | } action; |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1604 | } commit_t; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1605 | |
| 1606 | static void clear_commits(BDRVVVFATState* s) |
| 1607 | { |
| 1608 | int i; |
| 1609 | DLOG(fprintf(stderr, "clear_commits (%d commits)\n", s->commits.next)); |
| 1610 | for (i = 0; i < s->commits.next; i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1611 | commit_t* commit = array_get(&(s->commits), i); |
| 1612 | assert(commit->path || commit->action == ACTION_WRITEOUT); |
| 1613 | if (commit->action != ACTION_WRITEOUT) { |
| 1614 | assert(commit->path); |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 1615 | g_free(commit->path); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1616 | } else |
| 1617 | assert(commit->path == NULL); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1618 | } |
| 1619 | s->commits.next = 0; |
| 1620 | } |
| 1621 | |
| 1622 | static void schedule_rename(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1623 | uint32_t cluster, char* new_path) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1624 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1625 | commit_t* commit = array_get_next(&(s->commits)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1626 | commit->path = new_path; |
| 1627 | commit->param.rename.cluster = cluster; |
| 1628 | commit->action = ACTION_RENAME; |
| 1629 | } |
| 1630 | |
| 1631 | static void schedule_writeout(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1632 | int dir_index, uint32_t modified_offset) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1633 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1634 | commit_t* commit = array_get_next(&(s->commits)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1635 | commit->path = NULL; |
| 1636 | commit->param.writeout.dir_index = dir_index; |
| 1637 | commit->param.writeout.modified_offset = modified_offset; |
| 1638 | commit->action = ACTION_WRITEOUT; |
| 1639 | } |
| 1640 | |
| 1641 | static void schedule_new_file(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1642 | char* path, uint32_t first_cluster) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1643 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1644 | commit_t* commit = array_get_next(&(s->commits)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1645 | commit->path = path; |
| 1646 | commit->param.new_file.first_cluster = first_cluster; |
| 1647 | commit->action = ACTION_NEW_FILE; |
| 1648 | } |
| 1649 | |
| 1650 | static void schedule_mkdir(BDRVVVFATState* s, uint32_t cluster, char* path) |
| 1651 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1652 | commit_t* commit = array_get_next(&(s->commits)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1653 | commit->path = path; |
| 1654 | commit->param.mkdir.cluster = cluster; |
| 1655 | commit->action = ACTION_MKDIR; |
| 1656 | } |
| 1657 | |
| 1658 | typedef struct { |
ths | 64eaabd | 2008-07-03 19:54:19 +0000 | [diff] [blame] | 1659 | /* |
| 1660 | * Since the sequence number is at most 0x3f, and the filename |
| 1661 | * length is at most 13 times the sequence number, the maximal |
| 1662 | * filename length is 0x3f * 13 bytes. |
| 1663 | */ |
| 1664 | unsigned char name[0x3f * 13 + 1]; |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1665 | gunichar2 name2[0x3f * 13 + 1]; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1666 | int checksum, len; |
| 1667 | int sequence_number; |
| 1668 | } long_file_name; |
| 1669 | |
| 1670 | static void lfn_init(long_file_name* lfn) |
| 1671 | { |
| 1672 | lfn->sequence_number = lfn->len = 0; |
| 1673 | lfn->checksum = 0x100; |
| 1674 | } |
| 1675 | |
| 1676 | /* return 0 if parsed successfully, > 0 if no long name, < 0 if error */ |
| 1677 | static int parse_long_name(long_file_name* lfn, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1678 | const direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1679 | { |
| 1680 | int i, j, offset; |
| 1681 | const unsigned char* pointer = (const unsigned char*)direntry; |
| 1682 | |
| 1683 | if (!is_long_name(direntry)) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1684 | return 1; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1685 | |
| 1686 | if (pointer[0] & 0x40) { |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1687 | /* first entry; do some initialization */ |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1688 | lfn->sequence_number = pointer[0] & 0x3f; |
| 1689 | lfn->checksum = pointer[13]; |
| 1690 | lfn->name[0] = 0; |
| 1691 | lfn->name[lfn->sequence_number * 13] = 0; |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1692 | } else if ((pointer[0] & 0x3f) != --lfn->sequence_number) { |
| 1693 | /* not the expected sequence number */ |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1694 | return -1; |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1695 | } else if (pointer[13] != lfn->checksum) { |
| 1696 | /* not the expected checksum */ |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1697 | return -2; |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1698 | } else if (pointer[12] || pointer[26] || pointer[27]) { |
| 1699 | /* invalid zero fields */ |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1700 | return -3; |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1701 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1702 | |
| 1703 | offset = 13 * (lfn->sequence_number - 1); |
| 1704 | for (i = 0, j = 1; i < 13; i++, j+=2) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1705 | if (j == 11) |
| 1706 | j = 14; |
| 1707 | else if (j == 26) |
| 1708 | j = 28; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1709 | |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1710 | if (pointer[j] == 0 && pointer[j + 1] == 0) { |
| 1711 | /* end of long file name */ |
| 1712 | break; |
| 1713 | } |
| 1714 | gunichar2 c = (pointer[j + 1] << 8) + pointer[j]; |
| 1715 | lfn->name2[offset + i] = c; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1716 | } |
| 1717 | |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1718 | if (pointer[0] & 0x40) { |
| 1719 | /* first entry; set len */ |
| 1720 | lfn->len = offset + i; |
| 1721 | } |
| 1722 | if ((pointer[0] & 0x3f) == 0x01) { |
| 1723 | /* last entry; finalize entry */ |
| 1724 | glong olen; |
| 1725 | gchar *utf8 = g_utf16_to_utf8(lfn->name2, lfn->len, NULL, &olen, NULL); |
| 1726 | if (!utf8) { |
| 1727 | return -4; |
| 1728 | } |
| 1729 | lfn->len = olen; |
| 1730 | memcpy(lfn->name, utf8, olen + 1); |
| 1731 | g_free(utf8); |
| 1732 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1733 | |
| 1734 | return 0; |
| 1735 | } |
| 1736 | |
| 1737 | /* returns 0 if successful, >0 if no short_name, and <0 on error */ |
| 1738 | static int parse_short_name(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1739 | long_file_name* lfn, direntry_t* direntry) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1740 | { |
| 1741 | int i, j; |
| 1742 | |
| 1743 | if (!is_short_name(direntry)) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1744 | return 1; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1745 | |
| 1746 | for (j = 7; j >= 0 && direntry->name[j] == ' '; j--); |
| 1747 | for (i = 0; i <= j; i++) { |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1748 | uint8_t c = direntry->name[i]; |
| 1749 | if (c != to_valid_short_char(c)) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1750 | return -1; |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1751 | } else if (s->downcase_short_names) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1752 | lfn->name[i] = qemu_tolower(direntry->name[i]); |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1753 | } else { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1754 | lfn->name[i] = direntry->name[i]; |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1755 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1756 | } |
| 1757 | |
Stefan Weil | f671d17 | 2013-12-11 21:37:11 +0100 | [diff] [blame] | 1758 | for (j = 2; j >= 0 && direntry->name[8 + j] == ' '; j--) { |
| 1759 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1760 | if (j >= 0) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1761 | lfn->name[i++] = '.'; |
| 1762 | lfn->name[i + j + 1] = '\0'; |
| 1763 | for (;j >= 0; j--) { |
Stefan Weil | f671d17 | 2013-12-11 21:37:11 +0100 | [diff] [blame] | 1764 | uint8_t c = direntry->name[8 + j]; |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 1765 | if (c != to_valid_short_char(c)) { |
Stefan Weil | f671d17 | 2013-12-11 21:37:11 +0100 | [diff] [blame] | 1766 | return -2; |
| 1767 | } else if (s->downcase_short_names) { |
| 1768 | lfn->name[i + j] = qemu_tolower(c); |
| 1769 | } else { |
| 1770 | lfn->name[i + j] = c; |
| 1771 | } |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1772 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1773 | } else |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1774 | lfn->name[i + j + 1] = '\0'; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1775 | |
Hervé Poussineau | 8c4517f | 2017-07-15 15:28:38 +0200 | [diff] [blame] | 1776 | if (lfn->name[0] == DIR_KANJI_FAKE) { |
| 1777 | lfn->name[0] = DIR_KANJI; |
Hervé Poussineau | 78f002c | 2017-05-22 23:12:04 +0200 | [diff] [blame] | 1778 | } |
ths | ffe8ab8 | 2007-12-16 03:16:05 +0000 | [diff] [blame] | 1779 | lfn->len = strlen((char*)lfn->name); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1780 | |
| 1781 | return 0; |
| 1782 | } |
| 1783 | |
| 1784 | static inline uint32_t modified_fat_get(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1785 | unsigned int cluster) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1786 | { |
| 1787 | if (cluster < s->last_cluster_of_root_directory) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1788 | if (cluster + 1 == s->last_cluster_of_root_directory) |
| 1789 | return s->max_fat_value; |
| 1790 | else |
| 1791 | return cluster + 1; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1792 | } |
| 1793 | |
| 1794 | if (s->fat_type==32) { |
| 1795 | uint32_t* entry=((uint32_t*)s->fat2)+cluster; |
| 1796 | return le32_to_cpu(*entry); |
| 1797 | } else if (s->fat_type==16) { |
| 1798 | uint16_t* entry=((uint16_t*)s->fat2)+cluster; |
| 1799 | return le16_to_cpu(*entry); |
| 1800 | } else { |
| 1801 | const uint8_t* x=s->fat2+cluster*3/2; |
| 1802 | return ((x[0]|(x[1]<<8))>>(cluster&1?4:0))&0x0fff; |
| 1803 | } |
| 1804 | } |
| 1805 | |
Eric Blake | 6f712ee | 2017-03-08 15:34:28 -0600 | [diff] [blame] | 1806 | static inline bool cluster_was_modified(BDRVVVFATState *s, |
| 1807 | uint32_t cluster_num) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1808 | { |
| 1809 | int was_modified = 0; |
Eric Blake | d6a644b | 2017-07-07 07:44:57 -0500 | [diff] [blame] | 1810 | int i; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1811 | |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 1812 | if (s->qcow == NULL) { |
| 1813 | return 0; |
| 1814 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1815 | |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 1816 | for (i = 0; !was_modified && i < s->sectors_per_cluster; i++) { |
| 1817 | was_modified = bdrv_is_allocated(s->qcow->bs, |
Eric Blake | d6a644b | 2017-07-07 07:44:57 -0500 | [diff] [blame] | 1818 | (cluster2sector(s, cluster_num) + |
| 1819 | i) * BDRV_SECTOR_SIZE, |
| 1820 | BDRV_SECTOR_SIZE, NULL); |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 1821 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1822 | |
Eric Blake | 6f712ee | 2017-03-08 15:34:28 -0600 | [diff] [blame] | 1823 | /* |
| 1824 | * Note that this treats failures to learn allocation status the |
| 1825 | * same as if an allocation has occurred. It's as safe as |
| 1826 | * anything else, given that a failure to learn allocation status |
| 1827 | * will probably result in more failures. |
| 1828 | */ |
| 1829 | return !!was_modified; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1830 | } |
| 1831 | |
| 1832 | static const char* get_basename(const char* path) |
| 1833 | { |
| 1834 | char* basename = strrchr(path, '/'); |
| 1835 | if (basename == NULL) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1836 | return path; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1837 | else |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1838 | return basename + 1; /* strip '/' */ |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1839 | } |
| 1840 | |
| 1841 | /* |
| 1842 | * The array s->used_clusters holds the states of the clusters. If it is |
| 1843 | * part of a file, it has bit 2 set, in case of a directory, bit 1. If it |
| 1844 | * was modified, bit 3 is set. |
| 1845 | * If any cluster is allocated, but not part of a file or directory, this |
| 1846 | * driver refuses to commit. |
| 1847 | */ |
| 1848 | typedef enum { |
| 1849 | USED_DIRECTORY = 1, USED_FILE = 2, USED_ANY = 3, USED_ALLOCATED = 4 |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1850 | } used_t; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1851 | |
| 1852 | /* |
| 1853 | * get_cluster_count_for_direntry() not only determines how many clusters |
| 1854 | * are occupied by direntry, but also if it was renamed or modified. |
| 1855 | * |
| 1856 | * A file is thought to be renamed *only* if there already was a file with |
| 1857 | * exactly the same first cluster, but a different name. |
| 1858 | * |
| 1859 | * Further, the files/directories handled by this function are |
| 1860 | * assumed to be *not* deleted (and *only* those). |
| 1861 | */ |
| 1862 | static uint32_t get_cluster_count_for_direntry(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1863 | direntry_t* direntry, const char* path) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1864 | { |
| 1865 | /* |
| 1866 | * This is a little bit tricky: |
| 1867 | * IF the guest OS just inserts a cluster into the file chain, |
| 1868 | * and leaves the rest alone, (i.e. the original file had clusters |
| 1869 | * 15 -> 16, but now has 15 -> 32 -> 16), then the following happens: |
| 1870 | * |
| 1871 | * - do_commit will write the cluster into the file at the given |
| 1872 | * offset, but |
| 1873 | * |
| 1874 | * - the cluster which is overwritten should be moved to a later |
| 1875 | * position in the file. |
| 1876 | * |
| 1877 | * I am not aware that any OS does something as braindead, but this |
| 1878 | * situation could happen anyway when not committing for a long time. |
| 1879 | * Just to be sure that this does not bite us, detect it, and copy the |
| 1880 | * contents of the clusters to-be-overwritten into the qcow. |
| 1881 | */ |
| 1882 | int copy_it = 0; |
| 1883 | int was_modified = 0; |
| 1884 | int32_t ret = 0; |
| 1885 | |
| 1886 | uint32_t cluster_num = begin_of_direntry(direntry); |
| 1887 | uint32_t offset = 0; |
| 1888 | int first_mapping_index = -1; |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1889 | mapping_t* mapping = NULL; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1890 | const char* basename2 = NULL; |
| 1891 | |
| 1892 | vvfat_close_current_file(s); |
| 1893 | |
| 1894 | /* the root directory */ |
| 1895 | if (cluster_num == 0) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1896 | return 0; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1897 | |
| 1898 | /* write support */ |
| 1899 | if (s->qcow) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1900 | basename2 = get_basename(path); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1901 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1902 | mapping = find_mapping_for_cluster(s, cluster_num); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1903 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1904 | if (mapping) { |
| 1905 | const char* basename; |
bellard | da2414e | 2006-04-23 14:36:41 +0000 | [diff] [blame] | 1906 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1907 | assert(mapping->mode & MODE_DELETED); |
| 1908 | mapping->mode &= ~MODE_DELETED; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1909 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1910 | basename = get_basename(mapping->path); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1911 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1912 | assert(mapping->mode & MODE_NORMAL); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1913 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1914 | /* rename */ |
| 1915 | if (strcmp(basename, basename2)) |
| 1916 | schedule_rename(s, cluster_num, g_strdup(path)); |
| 1917 | } else if (is_file(direntry)) |
| 1918 | /* new file */ |
| 1919 | schedule_new_file(s, g_strdup(path), cluster_num); |
| 1920 | else { |
Blue Swirl | 43dc2a6 | 2010-03-18 18:41:57 +0000 | [diff] [blame] | 1921 | abort(); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1922 | return 0; |
| 1923 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1924 | } |
| 1925 | |
| 1926 | while(1) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1927 | if (s->qcow) { |
| 1928 | if (!copy_it && cluster_was_modified(s, cluster_num)) { |
| 1929 | if (mapping == NULL || |
| 1930 | mapping->begin > cluster_num || |
| 1931 | mapping->end <= cluster_num) |
| 1932 | mapping = find_mapping_for_cluster(s, cluster_num); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1933 | |
| 1934 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1935 | if (mapping && |
| 1936 | (mapping->mode & MODE_DIRECTORY) == 0) { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1937 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1938 | /* was modified in qcow */ |
| 1939 | if (offset != mapping->info.file.offset + s->cluster_size |
| 1940 | * (cluster_num - mapping->begin)) { |
| 1941 | /* offset of this cluster in file chain has changed */ |
Blue Swirl | 43dc2a6 | 2010-03-18 18:41:57 +0000 | [diff] [blame] | 1942 | abort(); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1943 | copy_it = 1; |
| 1944 | } else if (offset == 0) { |
| 1945 | const char* basename = get_basename(mapping->path); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1946 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1947 | if (strcmp(basename, basename2)) |
| 1948 | copy_it = 1; |
| 1949 | first_mapping_index = array_index(&(s->mapping), mapping); |
| 1950 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1951 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1952 | if (mapping->first_mapping_index != first_mapping_index |
| 1953 | && mapping->info.file.offset > 0) { |
Blue Swirl | 43dc2a6 | 2010-03-18 18:41:57 +0000 | [diff] [blame] | 1954 | abort(); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1955 | copy_it = 1; |
| 1956 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1957 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1958 | /* need to write out? */ |
| 1959 | if (!was_modified && is_file(direntry)) { |
| 1960 | was_modified = 1; |
| 1961 | schedule_writeout(s, mapping->dir_index, offset); |
| 1962 | } |
| 1963 | } |
| 1964 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1965 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1966 | if (copy_it) { |
Eric Blake | d6a644b | 2017-07-07 07:44:57 -0500 | [diff] [blame] | 1967 | int i; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1968 | /* |
| 1969 | * This is horribly inefficient, but that is okay, since |
| 1970 | * it is rarely executed, if at all. |
| 1971 | */ |
| 1972 | int64_t offset = cluster2sector(s, cluster_num); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 1973 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1974 | vvfat_close_current_file(s); |
Kevin Wolf | 7704df9 | 2011-11-08 10:50:12 +0100 | [diff] [blame] | 1975 | for (i = 0; i < s->sectors_per_cluster; i++) { |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 1976 | int res; |
| 1977 | |
Eric Blake | d6a644b | 2017-07-07 07:44:57 -0500 | [diff] [blame] | 1978 | res = bdrv_is_allocated(s->qcow->bs, |
| 1979 | (offset + i) * BDRV_SECTOR_SIZE, |
| 1980 | BDRV_SECTOR_SIZE, NULL); |
Eric Blake | 6f712ee | 2017-03-08 15:34:28 -0600 | [diff] [blame] | 1981 | if (res < 0) { |
| 1982 | return -1; |
| 1983 | } |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 1984 | if (!res) { |
| 1985 | res = vvfat_read(s->bs, offset, s->cluster_buffer, 1); |
| 1986 | if (res) { |
Kevin Wolf | 7704df9 | 2011-11-08 10:50:12 +0100 | [diff] [blame] | 1987 | return -1; |
| 1988 | } |
Kevin Wolf | 18d51c4 | 2016-05-31 14:42:08 +0200 | [diff] [blame] | 1989 | res = bdrv_write(s->qcow, offset, s->cluster_buffer, 1); |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 1990 | if (res) { |
Kevin Wolf | 7704df9 | 2011-11-08 10:50:12 +0100 | [diff] [blame] | 1991 | return -2; |
| 1992 | } |
| 1993 | } |
| 1994 | } |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1995 | } |
| 1996 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 1997 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 1998 | ret++; |
| 1999 | if (s->used_clusters[cluster_num] & USED_ANY) |
| 2000 | return 0; |
| 2001 | s->used_clusters[cluster_num] = USED_FILE; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2002 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2003 | cluster_num = modified_fat_get(s, cluster_num); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2004 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2005 | if (fat_eof(s, cluster_num)) |
| 2006 | return ret; |
| 2007 | else if (cluster_num < 2 || cluster_num > s->max_fat_value - 16) |
| 2008 | return -1; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2009 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2010 | offset += s->cluster_size; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2011 | } |
| 2012 | } |
| 2013 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2014 | /* |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 2015 | * This function looks at the modified data (qcow). |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2016 | * It returns 0 upon inconsistency or error, and the number of clusters |
| 2017 | * used by the directory, its subdirectories and their files. |
| 2018 | */ |
| 2019 | static int check_directory_consistency(BDRVVVFATState *s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2020 | int cluster_num, const char* path) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2021 | { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2022 | int ret = 0; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 2023 | unsigned char* cluster = g_malloc(s->cluster_size); |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2024 | direntry_t* direntries = (direntry_t*)cluster; |
| 2025 | mapping_t* mapping = find_mapping_for_cluster(s, cluster_num); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2026 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2027 | long_file_name lfn; |
| 2028 | int path_len = strlen(path); |
Kevin Wolf | 0d460d6 | 2011-06-01 10:57:00 +0200 | [diff] [blame] | 2029 | char path2[PATH_MAX + 1]; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2030 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2031 | assert(path_len < PATH_MAX); /* len was tested before! */ |
blueswir1 | 363a37d | 2008-08-21 17:58:08 +0000 | [diff] [blame] | 2032 | pstrcpy(path2, sizeof(path2), path); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2033 | path2[path_len] = '/'; |
| 2034 | path2[path_len + 1] = '\0'; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2035 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2036 | if (mapping) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2037 | const char* basename = get_basename(mapping->path); |
| 2038 | const char* basename2 = get_basename(path); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2039 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2040 | assert(mapping->mode & MODE_DIRECTORY); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2041 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2042 | assert(mapping->mode & MODE_DELETED); |
| 2043 | mapping->mode &= ~MODE_DELETED; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2044 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2045 | if (strcmp(basename, basename2)) |
| 2046 | schedule_rename(s, cluster_num, g_strdup(path)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2047 | } else |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2048 | /* new directory */ |
| 2049 | schedule_mkdir(s, cluster_num, g_strdup(path)); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 2050 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2051 | lfn_init(&lfn); |
| 2052 | do { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2053 | int i; |
| 2054 | int subret = 0; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2055 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2056 | ret++; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2057 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2058 | if (s->used_clusters[cluster_num] & USED_ANY) { |
| 2059 | fprintf(stderr, "cluster %d used more than once\n", (int)cluster_num); |
Markus Armbruster | 6262bbd | 2014-05-28 11:17:04 +0200 | [diff] [blame] | 2060 | goto fail; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2061 | } |
| 2062 | s->used_clusters[cluster_num] = USED_DIRECTORY; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2063 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2064 | DLOG(fprintf(stderr, "read cluster %d (sector %d)\n", (int)cluster_num, (int)cluster2sector(s, cluster_num))); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2065 | subret = vvfat_read(s->bs, cluster2sector(s, cluster_num), cluster, |
| 2066 | s->sectors_per_cluster); |
| 2067 | if (subret) { |
| 2068 | fprintf(stderr, "Error fetching direntries\n"); |
| 2069 | fail: |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2070 | g_free(cluster); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2071 | return 0; |
| 2072 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2073 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2074 | for (i = 0; i < 0x10 * s->sectors_per_cluster; i++) { |
| 2075 | int cluster_count = 0; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2076 | |
Stefan Weil | b2bedb2 | 2011-09-12 22:33:01 +0200 | [diff] [blame] | 2077 | DLOG(fprintf(stderr, "check direntry %d:\n", i); print_direntry(direntries + i)); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2078 | if (is_volume_label(direntries + i) || is_dot(direntries + i) || |
| 2079 | is_free(direntries + i)) |
| 2080 | continue; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2081 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2082 | subret = parse_long_name(&lfn, direntries + i); |
| 2083 | if (subret < 0) { |
| 2084 | fprintf(stderr, "Error in long name\n"); |
| 2085 | goto fail; |
| 2086 | } |
| 2087 | if (subret == 0 || is_free(direntries + i)) |
| 2088 | continue; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2089 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2090 | if (fat_chksum(direntries+i) != lfn.checksum) { |
| 2091 | subret = parse_short_name(s, &lfn, direntries + i); |
| 2092 | if (subret < 0) { |
| 2093 | fprintf(stderr, "Error in short name (%d)\n", subret); |
| 2094 | goto fail; |
| 2095 | } |
| 2096 | if (subret > 0 || !strcmp((char*)lfn.name, ".") |
| 2097 | || !strcmp((char*)lfn.name, "..")) |
| 2098 | continue; |
| 2099 | } |
| 2100 | lfn.checksum = 0x100; /* cannot use long name twice */ |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2101 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2102 | if (path_len + 1 + lfn.len >= PATH_MAX) { |
| 2103 | fprintf(stderr, "Name too long: %s/%s\n", path, lfn.name); |
| 2104 | goto fail; |
| 2105 | } |
blueswir1 | 363a37d | 2008-08-21 17:58:08 +0000 | [diff] [blame] | 2106 | pstrcpy(path2 + path_len + 1, sizeof(path2) - path_len - 1, |
| 2107 | (char*)lfn.name); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2108 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2109 | if (is_directory(direntries + i)) { |
| 2110 | if (begin_of_direntry(direntries + i) == 0) { |
| 2111 | DLOG(fprintf(stderr, "invalid begin for directory: %s\n", path2); print_direntry(direntries + i)); |
| 2112 | goto fail; |
| 2113 | } |
| 2114 | cluster_count = check_directory_consistency(s, |
| 2115 | begin_of_direntry(direntries + i), path2); |
| 2116 | if (cluster_count == 0) { |
| 2117 | DLOG(fprintf(stderr, "problem in directory %s:\n", path2); print_direntry(direntries + i)); |
| 2118 | goto fail; |
| 2119 | } |
| 2120 | } else if (is_file(direntries + i)) { |
| 2121 | /* check file size with FAT */ |
| 2122 | cluster_count = get_cluster_count_for_direntry(s, direntries + i, path2); |
| 2123 | if (cluster_count != |
Laurent Vivier | 13385ae | 2016-05-31 18:35:54 +0200 | [diff] [blame] | 2124 | DIV_ROUND_UP(le32_to_cpu(direntries[i].size), s->cluster_size)) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2125 | DLOG(fprintf(stderr, "Cluster count mismatch\n")); |
| 2126 | goto fail; |
| 2127 | } |
| 2128 | } else |
Blue Swirl | 43dc2a6 | 2010-03-18 18:41:57 +0000 | [diff] [blame] | 2129 | abort(); /* cluster_count = 0; */ |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2130 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2131 | ret += cluster_count; |
| 2132 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2133 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2134 | cluster_num = modified_fat_get(s, cluster_num); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2135 | } while(!fat_eof(s, cluster_num)); |
| 2136 | |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2137 | g_free(cluster); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2138 | return ret; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2139 | } |
| 2140 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2141 | /* returns 1 on success */ |
| 2142 | static int is_consistent(BDRVVVFATState* s) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2143 | { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2144 | int i, check; |
| 2145 | int used_clusters_count = 0; |
| 2146 | |
| 2147 | DLOG(checkpoint()); |
| 2148 | /* |
| 2149 | * - get modified FAT |
| 2150 | * - compare the two FATs (TODO) |
| 2151 | * - get buffer for marking used clusters |
| 2152 | * - recurse direntries from root (using bs->bdrv_read to make |
| 2153 | * sure to get the new data) |
| 2154 | * - check that the FAT agrees with the size |
| 2155 | * - count the number of clusters occupied by this directory and |
| 2156 | * its files |
| 2157 | * - check that the cumulative used cluster count agrees with the |
| 2158 | * FAT |
| 2159 | * - if all is fine, return number of used clusters |
| 2160 | */ |
| 2161 | if (s->fat2 == NULL) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2162 | int size = 0x200 * s->sectors_per_fat; |
| 2163 | s->fat2 = g_malloc(size); |
| 2164 | memcpy(s->fat2, s->fat.pointer, size); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2165 | } |
| 2166 | check = vvfat_read(s->bs, |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 2167 | s->offset_to_fat, s->fat2, s->sectors_per_fat); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2168 | if (check) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2169 | fprintf(stderr, "Could not copy fat\n"); |
| 2170 | return 0; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2171 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2172 | assert (s->used_clusters); |
| 2173 | for (i = 0; i < sector2cluster(s, s->sector_count); i++) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2174 | s->used_clusters[i] &= ~USED_ANY; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2175 | |
| 2176 | clear_commits(s); |
| 2177 | |
| 2178 | /* mark every mapped file/directory as deleted. |
| 2179 | * (check_directory_consistency() will unmark those still present). */ |
| 2180 | if (s->qcow) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2181 | for (i = 0; i < s->mapping.next; i++) { |
| 2182 | mapping_t* mapping = array_get(&(s->mapping), i); |
| 2183 | if (mapping->first_mapping_index < 0) |
| 2184 | mapping->mode |= MODE_DELETED; |
| 2185 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2186 | |
| 2187 | used_clusters_count = check_directory_consistency(s, 0, s->path); |
| 2188 | if (used_clusters_count <= 0) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2189 | DLOG(fprintf(stderr, "problem in directory\n")); |
| 2190 | return 0; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2191 | } |
| 2192 | |
| 2193 | check = s->last_cluster_of_root_directory; |
| 2194 | for (i = check; i < sector2cluster(s, s->sector_count); i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2195 | if (modified_fat_get(s, i)) { |
| 2196 | if(!s->used_clusters[i]) { |
| 2197 | DLOG(fprintf(stderr, "FAT was modified (%d), but cluster is not used?\n", i)); |
| 2198 | return 0; |
| 2199 | } |
| 2200 | check++; |
| 2201 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2202 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2203 | if (s->used_clusters[i] == USED_ALLOCATED) { |
| 2204 | /* allocated, but not used... */ |
| 2205 | DLOG(fprintf(stderr, "unused, modified cluster: %d\n", i)); |
| 2206 | return 0; |
| 2207 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2208 | } |
| 2209 | |
| 2210 | if (check != used_clusters_count) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2211 | return 0; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2212 | |
| 2213 | return used_clusters_count; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2214 | } |
| 2215 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2216 | static inline void adjust_mapping_indices(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2217 | int offset, int adjust) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2218 | { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2219 | int i; |
| 2220 | |
| 2221 | for (i = 0; i < s->mapping.next; i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2222 | mapping_t* mapping = array_get(&(s->mapping), i); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2223 | |
| 2224 | #define ADJUST_MAPPING_INDEX(name) \ |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2225 | if (mapping->name >= offset) \ |
| 2226 | mapping->name += adjust |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2227 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2228 | ADJUST_MAPPING_INDEX(first_mapping_index); |
| 2229 | if (mapping->mode & MODE_DIRECTORY) |
| 2230 | ADJUST_MAPPING_INDEX(info.dir.parent_mapping_index); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2231 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2232 | } |
| 2233 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2234 | /* insert or update mapping */ |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2235 | static mapping_t* insert_mapping(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2236 | uint32_t begin, uint32_t end) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2237 | { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2238 | /* |
| 2239 | * - find mapping where mapping->begin >= begin, |
| 2240 | * - if mapping->begin > begin: insert |
| 2241 | * - adjust all references to mappings! |
| 2242 | * - else: adjust |
| 2243 | * - replace name |
| 2244 | */ |
| 2245 | int index = find_mapping_for_cluster_aux(s, begin, 0, s->mapping.next); |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2246 | mapping_t* mapping = NULL; |
| 2247 | mapping_t* first_mapping = array_get(&(s->mapping), 0); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2248 | |
| 2249 | if (index < s->mapping.next && (mapping = array_get(&(s->mapping), index)) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2250 | && mapping->begin < begin) { |
| 2251 | mapping->end = begin; |
| 2252 | index++; |
| 2253 | mapping = array_get(&(s->mapping), index); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2254 | } |
| 2255 | if (index >= s->mapping.next || mapping->begin > begin) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2256 | mapping = array_insert(&(s->mapping), index, 1); |
| 2257 | mapping->path = NULL; |
| 2258 | adjust_mapping_indices(s, index, +1); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2259 | } |
| 2260 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2261 | mapping->begin = begin; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2262 | mapping->end = end; |
| 2263 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2264 | DLOG(mapping_t* next_mapping; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2265 | assert(index + 1 >= s->mapping.next || |
| 2266 | ((next_mapping = array_get(&(s->mapping), index + 1)) && |
| 2267 | next_mapping->begin >= end))); |
| 2268 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2269 | if (s->current_mapping && first_mapping != (mapping_t*)s->mapping.pointer) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2270 | s->current_mapping = array_get(&(s->mapping), |
| 2271 | s->current_mapping - first_mapping); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2272 | |
| 2273 | return mapping; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2274 | } |
| 2275 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2276 | static int remove_mapping(BDRVVVFATState* s, int mapping_index) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2277 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2278 | mapping_t* mapping = array_get(&(s->mapping), mapping_index); |
| 2279 | mapping_t* first_mapping = array_get(&(s->mapping), 0); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2280 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2281 | /* free mapping */ |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2282 | if (mapping->first_mapping_index < 0) { |
| 2283 | g_free(mapping->path); |
| 2284 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2285 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2286 | /* remove from s->mapping */ |
| 2287 | array_remove(&(s->mapping), mapping_index); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2288 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2289 | /* adjust all references to mappings */ |
| 2290 | adjust_mapping_indices(s, mapping_index, -1); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2291 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2292 | if (s->current_mapping && first_mapping != (mapping_t*)s->mapping.pointer) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2293 | s->current_mapping = array_get(&(s->mapping), |
| 2294 | s->current_mapping - first_mapping); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2295 | |
| 2296 | return 0; |
| 2297 | } |
| 2298 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2299 | static void adjust_dirindices(BDRVVVFATState* s, int offset, int adjust) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2300 | { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2301 | int i; |
| 2302 | for (i = 0; i < s->mapping.next; i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2303 | mapping_t* mapping = array_get(&(s->mapping), i); |
| 2304 | if (mapping->dir_index >= offset) |
| 2305 | mapping->dir_index += adjust; |
| 2306 | if ((mapping->mode & MODE_DIRECTORY) && |
| 2307 | mapping->info.dir.first_dir_index >= offset) |
| 2308 | mapping->info.dir.first_dir_index += adjust; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2309 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2310 | } |
| 2311 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2312 | static direntry_t* insert_direntries(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2313 | int dir_index, int count) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2314 | { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2315 | /* |
| 2316 | * make room in s->directory, |
| 2317 | * adjust_dirindices |
| 2318 | */ |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2319 | direntry_t* result = array_insert(&(s->directory), dir_index, count); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2320 | if (result == NULL) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2321 | return NULL; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2322 | adjust_dirindices(s, dir_index, count); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2323 | return result; |
| 2324 | } |
| 2325 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2326 | static int remove_direntries(BDRVVVFATState* s, int dir_index, int count) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2327 | { |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2328 | int ret = array_remove_slice(&(s->directory), dir_index, count); |
| 2329 | if (ret) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2330 | return ret; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2331 | adjust_dirindices(s, dir_index, -count); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2332 | return 0; |
| 2333 | } |
| 2334 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2335 | /* |
| 2336 | * Adapt the mappings of the cluster chain starting at first cluster |
| 2337 | * (i.e. if a file starts at first_cluster, the chain is followed according |
| 2338 | * to the modified fat, and the corresponding entries in s->mapping are |
| 2339 | * adjusted) |
| 2340 | */ |
| 2341 | static int commit_mappings(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2342 | uint32_t first_cluster, int dir_index) |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2343 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2344 | mapping_t* mapping = find_mapping_for_cluster(s, first_cluster); |
| 2345 | direntry_t* direntry = array_get(&(s->directory), dir_index); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2346 | uint32_t cluster = first_cluster; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2347 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2348 | vvfat_close_current_file(s); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2349 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2350 | assert(mapping); |
| 2351 | assert(mapping->begin == first_cluster); |
| 2352 | mapping->first_mapping_index = -1; |
| 2353 | mapping->dir_index = dir_index; |
| 2354 | mapping->mode = (dir_index <= 0 || is_directory(direntry)) ? |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2355 | MODE_DIRECTORY : MODE_NORMAL; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2356 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2357 | while (!fat_eof(s, cluster)) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2358 | uint32_t c, c1; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2359 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2360 | for (c = cluster, c1 = modified_fat_get(s, c); c + 1 == c1; |
| 2361 | c = c1, c1 = modified_fat_get(s, c1)); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2362 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2363 | c++; |
| 2364 | if (c > mapping->end) { |
| 2365 | int index = array_index(&(s->mapping), mapping); |
| 2366 | int i, max_i = s->mapping.next - index; |
| 2367 | for (i = 1; i < max_i && mapping[i].begin < c; i++); |
| 2368 | while (--i > 0) |
| 2369 | remove_mapping(s, index + 1); |
| 2370 | } |
| 2371 | assert(mapping == array_get(&(s->mapping), s->mapping.next - 1) |
| 2372 | || mapping[1].begin >= c); |
| 2373 | mapping->end = c; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2374 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2375 | if (!fat_eof(s, c1)) { |
| 2376 | int i = find_mapping_for_cluster_aux(s, c1, 0, s->mapping.next); |
| 2377 | mapping_t* next_mapping = i >= s->mapping.next ? NULL : |
| 2378 | array_get(&(s->mapping), i); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2379 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2380 | if (next_mapping == NULL || next_mapping->begin > c1) { |
| 2381 | int i1 = array_index(&(s->mapping), mapping); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2382 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2383 | next_mapping = insert_mapping(s, c1, c1+1); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2384 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2385 | if (c1 < c) |
| 2386 | i1++; |
| 2387 | mapping = array_get(&(s->mapping), i1); |
| 2388 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2389 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2390 | next_mapping->dir_index = mapping->dir_index; |
| 2391 | next_mapping->first_mapping_index = |
| 2392 | mapping->first_mapping_index < 0 ? |
| 2393 | array_index(&(s->mapping), mapping) : |
| 2394 | mapping->first_mapping_index; |
| 2395 | next_mapping->path = mapping->path; |
| 2396 | next_mapping->mode = mapping->mode; |
| 2397 | next_mapping->read_only = mapping->read_only; |
| 2398 | if (mapping->mode & MODE_DIRECTORY) { |
| 2399 | next_mapping->info.dir.parent_mapping_index = |
| 2400 | mapping->info.dir.parent_mapping_index; |
| 2401 | next_mapping->info.dir.first_dir_index = |
| 2402 | mapping->info.dir.first_dir_index + |
| 2403 | 0x10 * s->sectors_per_cluster * |
| 2404 | (mapping->end - mapping->begin); |
| 2405 | } else |
| 2406 | next_mapping->info.file.offset = mapping->info.file.offset + |
| 2407 | mapping->end - mapping->begin; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2408 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2409 | mapping = next_mapping; |
| 2410 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 2411 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2412 | cluster = c1; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2413 | } |
| 2414 | |
| 2415 | return 0; |
| 2416 | } |
| 2417 | |
| 2418 | static int commit_direntries(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2419 | int dir_index, int parent_mapping_index) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2420 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2421 | direntry_t* direntry = array_get(&(s->directory), dir_index); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2422 | uint32_t first_cluster = dir_index == 0 ? 0 : begin_of_direntry(direntry); |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2423 | mapping_t* mapping = find_mapping_for_cluster(s, first_cluster); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2424 | |
| 2425 | int factor = 0x10 * s->sectors_per_cluster; |
| 2426 | int old_cluster_count, new_cluster_count; |
| 2427 | int current_dir_index = mapping->info.dir.first_dir_index; |
| 2428 | int first_dir_index = current_dir_index; |
| 2429 | int ret, i; |
| 2430 | uint32_t c; |
| 2431 | |
| 2432 | DLOG(fprintf(stderr, "commit_direntries for %s, parent_mapping_index %d\n", mapping->path, parent_mapping_index)); |
| 2433 | |
| 2434 | assert(direntry); |
| 2435 | assert(mapping); |
| 2436 | assert(mapping->begin == first_cluster); |
| 2437 | assert(mapping->info.dir.first_dir_index < s->directory.next); |
| 2438 | assert(mapping->mode & MODE_DIRECTORY); |
| 2439 | assert(dir_index == 0 || is_directory(direntry)); |
| 2440 | |
| 2441 | mapping->info.dir.parent_mapping_index = parent_mapping_index; |
| 2442 | |
| 2443 | if (first_cluster == 0) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2444 | old_cluster_count = new_cluster_count = |
| 2445 | s->last_cluster_of_root_directory; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2446 | } else { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2447 | for (old_cluster_count = 0, c = first_cluster; !fat_eof(s, c); |
| 2448 | c = fat_get(s, c)) |
| 2449 | old_cluster_count++; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2450 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2451 | for (new_cluster_count = 0, c = first_cluster; !fat_eof(s, c); |
| 2452 | c = modified_fat_get(s, c)) |
| 2453 | new_cluster_count++; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2454 | } |
| 2455 | |
| 2456 | if (new_cluster_count > old_cluster_count) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2457 | if (insert_direntries(s, |
| 2458 | current_dir_index + factor * old_cluster_count, |
| 2459 | factor * (new_cluster_count - old_cluster_count)) == NULL) |
| 2460 | return -1; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2461 | } else if (new_cluster_count < old_cluster_count) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2462 | remove_direntries(s, |
| 2463 | current_dir_index + factor * new_cluster_count, |
| 2464 | factor * (old_cluster_count - new_cluster_count)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2465 | |
| 2466 | for (c = first_cluster; !fat_eof(s, c); c = modified_fat_get(s, c)) { |
Kevin Wolf | ebb72c9 | 2016-04-27 14:11:38 +0200 | [diff] [blame] | 2467 | direntry_t *first_direntry; |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2468 | void* direntry = array_get(&(s->directory), current_dir_index); |
| 2469 | int ret = vvfat_read(s->bs, cluster2sector(s, c), direntry, |
| 2470 | s->sectors_per_cluster); |
| 2471 | if (ret) |
| 2472 | return ret; |
Kevin Wolf | ebb72c9 | 2016-04-27 14:11:38 +0200 | [diff] [blame] | 2473 | |
| 2474 | /* The first directory entry on the filesystem is the volume name */ |
| 2475 | first_direntry = (direntry_t*) s->directory.pointer; |
| 2476 | assert(!memcmp(first_direntry->name, s->volume_label, 11)); |
| 2477 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2478 | current_dir_index += factor; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2479 | } |
| 2480 | |
| 2481 | ret = commit_mappings(s, first_cluster, dir_index); |
| 2482 | if (ret) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2483 | return ret; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2484 | |
| 2485 | /* recurse */ |
| 2486 | for (i = 0; i < factor * new_cluster_count; i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2487 | direntry = array_get(&(s->directory), first_dir_index + i); |
| 2488 | if (is_directory(direntry) && !is_dot(direntry)) { |
| 2489 | mapping = find_mapping_for_cluster(s, first_cluster); |
| 2490 | assert(mapping->mode & MODE_DIRECTORY); |
| 2491 | ret = commit_direntries(s, first_dir_index + i, |
| 2492 | array_index(&(s->mapping), mapping)); |
| 2493 | if (ret) |
| 2494 | return ret; |
| 2495 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2496 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2497 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2498 | return 0; |
| 2499 | } |
| 2500 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2501 | /* commit one file (adjust contents, adjust mapping), |
| 2502 | return first_mapping_index */ |
| 2503 | static int commit_one_file(BDRVVVFATState* s, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2504 | int dir_index, uint32_t offset) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2505 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2506 | direntry_t* direntry = array_get(&(s->directory), dir_index); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2507 | uint32_t c = begin_of_direntry(direntry); |
| 2508 | uint32_t first_cluster = c; |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2509 | mapping_t* mapping = find_mapping_for_cluster(s, c); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2510 | uint32_t size = filesize_of_direntry(direntry); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 2511 | char* cluster = g_malloc(s->cluster_size); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2512 | uint32_t i; |
| 2513 | int fd = 0; |
| 2514 | |
| 2515 | assert(offset < size); |
| 2516 | assert((offset % s->cluster_size) == 0); |
| 2517 | |
| 2518 | for (i = s->cluster_size; i < offset; i += s->cluster_size) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2519 | c = modified_fat_get(s, c); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2520 | |
Corey Bryant | 6165f4d | 2012-08-14 16:43:45 -0400 | [diff] [blame] | 2521 | fd = qemu_open(mapping->path, O_RDWR | O_CREAT | O_BINARY, 0666); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2522 | if (fd < 0) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2523 | fprintf(stderr, "Could not open %s... (%s, %d)\n", mapping->path, |
| 2524 | strerror(errno), errno); |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2525 | g_free(cluster); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2526 | return fd; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2527 | } |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2528 | if (offset > 0) { |
| 2529 | if (lseek(fd, offset, SEEK_SET) != offset) { |
Corey Bryant | 2e1e79d | 2012-08-14 16:43:46 -0400 | [diff] [blame] | 2530 | qemu_close(fd); |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2531 | g_free(cluster); |
| 2532 | return -3; |
| 2533 | } |
| 2534 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2535 | |
| 2536 | while (offset < size) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2537 | uint32_t c1; |
| 2538 | int rest_size = (size - offset > s->cluster_size ? |
| 2539 | s->cluster_size : size - offset); |
| 2540 | int ret; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2541 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2542 | c1 = modified_fat_get(s, c); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2543 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2544 | assert((size - offset == 0 && fat_eof(s, c)) || |
| 2545 | (size > offset && c >=2 && !fat_eof(s, c))); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2546 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2547 | ret = vvfat_read(s->bs, cluster2sector(s, c), |
Marc-André Lureau | 78ee96d | 2017-06-22 13:04:16 +0200 | [diff] [blame] | 2548 | (uint8_t*)cluster, DIV_ROUND_UP(rest_size, 0x200)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2549 | |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2550 | if (ret < 0) { |
Corey Bryant | 2e1e79d | 2012-08-14 16:43:46 -0400 | [diff] [blame] | 2551 | qemu_close(fd); |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2552 | g_free(cluster); |
| 2553 | return ret; |
| 2554 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2555 | |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2556 | if (write(fd, cluster, rest_size) < 0) { |
Corey Bryant | 2e1e79d | 2012-08-14 16:43:46 -0400 | [diff] [blame] | 2557 | qemu_close(fd); |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2558 | g_free(cluster); |
| 2559 | return -2; |
| 2560 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2561 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2562 | offset += rest_size; |
| 2563 | c = c1; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2564 | } |
| 2565 | |
Kirill A. Shutemov | 2dedf83 | 2010-01-20 00:56:14 +0100 | [diff] [blame] | 2566 | if (ftruncate(fd, size)) { |
| 2567 | perror("ftruncate()"); |
Corey Bryant | 2e1e79d | 2012-08-14 16:43:46 -0400 | [diff] [blame] | 2568 | qemu_close(fd); |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2569 | g_free(cluster); |
Kirill A. Shutemov | 2dedf83 | 2010-01-20 00:56:14 +0100 | [diff] [blame] | 2570 | return -4; |
| 2571 | } |
Corey Bryant | 2e1e79d | 2012-08-14 16:43:46 -0400 | [diff] [blame] | 2572 | qemu_close(fd); |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2573 | g_free(cluster); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2574 | |
| 2575 | return commit_mappings(s, first_cluster, dir_index); |
| 2576 | } |
| 2577 | |
| 2578 | #ifdef DEBUG |
| 2579 | /* test, if all mappings point to valid direntries */ |
| 2580 | static void check1(BDRVVVFATState* s) |
| 2581 | { |
| 2582 | int i; |
| 2583 | for (i = 0; i < s->mapping.next; i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2584 | mapping_t* mapping = array_get(&(s->mapping), i); |
| 2585 | if (mapping->mode & MODE_DELETED) { |
| 2586 | fprintf(stderr, "deleted\n"); |
| 2587 | continue; |
| 2588 | } |
| 2589 | assert(mapping->dir_index < s->directory.next); |
| 2590 | direntry_t* direntry = array_get(&(s->directory), mapping->dir_index); |
| 2591 | assert(mapping->begin == begin_of_direntry(direntry) || mapping->first_mapping_index >= 0); |
| 2592 | if (mapping->mode & MODE_DIRECTORY) { |
| 2593 | assert(mapping->info.dir.first_dir_index + 0x10 * s->sectors_per_cluster * (mapping->end - mapping->begin) <= s->directory.next); |
| 2594 | assert((mapping->info.dir.first_dir_index % (0x10 * s->sectors_per_cluster)) == 0); |
| 2595 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2596 | } |
| 2597 | } |
| 2598 | |
| 2599 | /* test, if all direntries have mappings */ |
| 2600 | static void check2(BDRVVVFATState* s) |
| 2601 | { |
| 2602 | int i; |
| 2603 | int first_mapping = -1; |
| 2604 | |
| 2605 | for (i = 0; i < s->directory.next; i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2606 | direntry_t* direntry = array_get(&(s->directory), i); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2607 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2608 | if (is_short_name(direntry) && begin_of_direntry(direntry)) { |
| 2609 | mapping_t* mapping = find_mapping_for_cluster(s, begin_of_direntry(direntry)); |
| 2610 | assert(mapping); |
| 2611 | assert(mapping->dir_index == i || is_dot(direntry)); |
| 2612 | assert(mapping->begin == begin_of_direntry(direntry) || is_dot(direntry)); |
| 2613 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2614 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2615 | if ((i % (0x10 * s->sectors_per_cluster)) == 0) { |
| 2616 | /* cluster start */ |
| 2617 | int j, count = 0; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2618 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2619 | for (j = 0; j < s->mapping.next; j++) { |
| 2620 | mapping_t* mapping = array_get(&(s->mapping), j); |
| 2621 | if (mapping->mode & MODE_DELETED) |
| 2622 | continue; |
| 2623 | if (mapping->mode & MODE_DIRECTORY) { |
| 2624 | if (mapping->info.dir.first_dir_index <= i && mapping->info.dir.first_dir_index + 0x10 * s->sectors_per_cluster > i) { |
| 2625 | assert(++count == 1); |
| 2626 | if (mapping->first_mapping_index == -1) |
| 2627 | first_mapping = array_index(&(s->mapping), mapping); |
| 2628 | else |
| 2629 | assert(first_mapping == mapping->first_mapping_index); |
| 2630 | if (mapping->info.dir.parent_mapping_index < 0) |
| 2631 | assert(j == 0); |
| 2632 | else { |
| 2633 | mapping_t* parent = array_get(&(s->mapping), mapping->info.dir.parent_mapping_index); |
| 2634 | assert(parent->mode & MODE_DIRECTORY); |
| 2635 | assert(parent->info.dir.first_dir_index < mapping->info.dir.first_dir_index); |
| 2636 | } |
| 2637 | } |
| 2638 | } |
| 2639 | } |
| 2640 | if (count == 0) |
| 2641 | first_mapping = -1; |
| 2642 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2643 | } |
| 2644 | } |
| 2645 | #endif |
| 2646 | |
| 2647 | static int handle_renames_and_mkdirs(BDRVVVFATState* s) |
| 2648 | { |
| 2649 | int i; |
| 2650 | |
| 2651 | #ifdef DEBUG |
| 2652 | fprintf(stderr, "handle_renames\n"); |
| 2653 | for (i = 0; i < s->commits.next; i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2654 | commit_t* commit = array_get(&(s->commits), i); |
| 2655 | fprintf(stderr, "%d, %s (%d, %d)\n", i, commit->path ? commit->path : "(null)", commit->param.rename.cluster, commit->action); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2656 | } |
| 2657 | #endif |
| 2658 | |
| 2659 | for (i = 0; i < s->commits.next;) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2660 | commit_t* commit = array_get(&(s->commits), i); |
| 2661 | if (commit->action == ACTION_RENAME) { |
| 2662 | mapping_t* mapping = find_mapping_for_cluster(s, |
| 2663 | commit->param.rename.cluster); |
| 2664 | char* old_path = mapping->path; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2665 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2666 | assert(commit->path); |
| 2667 | mapping->path = commit->path; |
| 2668 | if (rename(old_path, mapping->path)) |
| 2669 | return -2; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2670 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2671 | if (mapping->mode & MODE_DIRECTORY) { |
| 2672 | int l1 = strlen(mapping->path); |
| 2673 | int l2 = strlen(old_path); |
| 2674 | int diff = l1 - l2; |
| 2675 | direntry_t* direntry = array_get(&(s->directory), |
| 2676 | mapping->info.dir.first_dir_index); |
| 2677 | uint32_t c = mapping->begin; |
| 2678 | int i = 0; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2679 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2680 | /* recurse */ |
| 2681 | while (!fat_eof(s, c)) { |
| 2682 | do { |
| 2683 | direntry_t* d = direntry + i; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2684 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2685 | if (is_file(d) || (is_directory(d) && !is_dot(d))) { |
| 2686 | mapping_t* m = find_mapping_for_cluster(s, |
| 2687 | begin_of_direntry(d)); |
| 2688 | int l = strlen(m->path); |
| 2689 | char* new_path = g_malloc(l + diff + 1); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2690 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2691 | assert(!strncmp(m->path, mapping->path, l2)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2692 | |
blueswir1 | 363a37d | 2008-08-21 17:58:08 +0000 | [diff] [blame] | 2693 | pstrcpy(new_path, l + diff + 1, mapping->path); |
| 2694 | pstrcpy(new_path + l1, l + diff + 1 - l1, |
| 2695 | m->path + l2); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2696 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2697 | schedule_rename(s, m->begin, new_path); |
| 2698 | } |
| 2699 | i++; |
| 2700 | } while((i % (0x10 * s->sectors_per_cluster)) != 0); |
| 2701 | c = fat_get(s, c); |
| 2702 | } |
| 2703 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2704 | |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 2705 | g_free(old_path); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2706 | array_remove(&(s->commits), i); |
| 2707 | continue; |
| 2708 | } else if (commit->action == ACTION_MKDIR) { |
| 2709 | mapping_t* mapping; |
| 2710 | int j, parent_path_len; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2711 | |
bellard | 48c2f06 | 2005-12-19 22:11:49 +0000 | [diff] [blame] | 2712 | #ifdef __MINGW32__ |
| 2713 | if (mkdir(commit->path)) |
| 2714 | return -5; |
| 2715 | #else |
| 2716 | if (mkdir(commit->path, 0755)) |
| 2717 | return -5; |
| 2718 | #endif |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2719 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2720 | mapping = insert_mapping(s, commit->param.mkdir.cluster, |
| 2721 | commit->param.mkdir.cluster + 1); |
| 2722 | if (mapping == NULL) |
| 2723 | return -6; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2724 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2725 | mapping->mode = MODE_DIRECTORY; |
| 2726 | mapping->read_only = 0; |
| 2727 | mapping->path = commit->path; |
| 2728 | j = s->directory.next; |
| 2729 | assert(j); |
| 2730 | insert_direntries(s, s->directory.next, |
| 2731 | 0x10 * s->sectors_per_cluster); |
| 2732 | mapping->info.dir.first_dir_index = j; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2733 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2734 | parent_path_len = strlen(commit->path) |
| 2735 | - strlen(get_basename(commit->path)) - 1; |
| 2736 | for (j = 0; j < s->mapping.next; j++) { |
| 2737 | mapping_t* m = array_get(&(s->mapping), j); |
| 2738 | if (m->first_mapping_index < 0 && m != mapping && |
| 2739 | !strncmp(m->path, mapping->path, parent_path_len) && |
| 2740 | strlen(m->path) == parent_path_len) |
| 2741 | break; |
| 2742 | } |
| 2743 | assert(j < s->mapping.next); |
| 2744 | mapping->info.dir.parent_mapping_index = j; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2745 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2746 | array_remove(&(s->commits), i); |
| 2747 | continue; |
| 2748 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2749 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2750 | i++; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2751 | } |
| 2752 | return 0; |
| 2753 | } |
| 2754 | |
| 2755 | /* |
| 2756 | * TODO: make sure that the short name is not matching *another* file |
| 2757 | */ |
| 2758 | static int handle_commits(BDRVVVFATState* s) |
| 2759 | { |
| 2760 | int i, fail = 0; |
| 2761 | |
| 2762 | vvfat_close_current_file(s); |
| 2763 | |
| 2764 | for (i = 0; !fail && i < s->commits.next; i++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2765 | commit_t* commit = array_get(&(s->commits), i); |
| 2766 | switch(commit->action) { |
| 2767 | case ACTION_RENAME: case ACTION_MKDIR: |
Blue Swirl | 43dc2a6 | 2010-03-18 18:41:57 +0000 | [diff] [blame] | 2768 | abort(); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2769 | fail = -2; |
| 2770 | break; |
| 2771 | case ACTION_WRITEOUT: { |
Blue Swirl | a6c6f76 | 2010-03-13 14:18:50 +0000 | [diff] [blame] | 2772 | #ifndef NDEBUG |
| 2773 | /* these variables are only used by assert() below */ |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2774 | direntry_t* entry = array_get(&(s->directory), |
| 2775 | commit->param.writeout.dir_index); |
| 2776 | uint32_t begin = begin_of_direntry(entry); |
| 2777 | mapping_t* mapping = find_mapping_for_cluster(s, begin); |
Blue Swirl | a6c6f76 | 2010-03-13 14:18:50 +0000 | [diff] [blame] | 2778 | #endif |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2779 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2780 | assert(mapping); |
| 2781 | assert(mapping->begin == begin); |
| 2782 | assert(commit->path == NULL); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2783 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2784 | if (commit_one_file(s, commit->param.writeout.dir_index, |
| 2785 | commit->param.writeout.modified_offset)) |
| 2786 | fail = -3; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2787 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2788 | break; |
| 2789 | } |
| 2790 | case ACTION_NEW_FILE: { |
| 2791 | int begin = commit->param.new_file.first_cluster; |
| 2792 | mapping_t* mapping = find_mapping_for_cluster(s, begin); |
| 2793 | direntry_t* entry; |
| 2794 | int i; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2795 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2796 | /* find direntry */ |
| 2797 | for (i = 0; i < s->directory.next; i++) { |
| 2798 | entry = array_get(&(s->directory), i); |
| 2799 | if (is_file(entry) && begin_of_direntry(entry) == begin) |
| 2800 | break; |
| 2801 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2802 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2803 | if (i >= s->directory.next) { |
| 2804 | fail = -6; |
| 2805 | continue; |
| 2806 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2807 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2808 | /* make sure there exists an initial mapping */ |
| 2809 | if (mapping && mapping->begin != begin) { |
| 2810 | mapping->end = begin; |
| 2811 | mapping = NULL; |
| 2812 | } |
| 2813 | if (mapping == NULL) { |
| 2814 | mapping = insert_mapping(s, begin, begin+1); |
| 2815 | } |
| 2816 | /* most members will be fixed in commit_mappings() */ |
| 2817 | assert(commit->path); |
| 2818 | mapping->path = commit->path; |
| 2819 | mapping->read_only = 0; |
| 2820 | mapping->mode = MODE_NORMAL; |
| 2821 | mapping->info.file.offset = 0; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2822 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2823 | if (commit_one_file(s, i, 0)) |
| 2824 | fail = -7; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2825 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2826 | break; |
| 2827 | } |
| 2828 | default: |
Blue Swirl | 43dc2a6 | 2010-03-18 18:41:57 +0000 | [diff] [blame] | 2829 | abort(); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2830 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2831 | } |
| 2832 | if (i > 0 && array_remove_slice(&(s->commits), 0, i)) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2833 | return -1; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2834 | return fail; |
| 2835 | } |
| 2836 | |
| 2837 | static int handle_deletes(BDRVVVFATState* s) |
| 2838 | { |
| 2839 | int i, deferred = 1, deleted = 1; |
| 2840 | |
| 2841 | /* delete files corresponding to mappings marked as deleted */ |
| 2842 | /* handle DELETEs and unused mappings (modified_fat_get(s, mapping->begin) == 0) */ |
| 2843 | while (deferred && deleted) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2844 | deferred = 0; |
| 2845 | deleted = 0; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2846 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2847 | for (i = 1; i < s->mapping.next; i++) { |
| 2848 | mapping_t* mapping = array_get(&(s->mapping), i); |
| 2849 | if (mapping->mode & MODE_DELETED) { |
| 2850 | direntry_t* entry = array_get(&(s->directory), |
| 2851 | mapping->dir_index); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2852 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2853 | if (is_free(entry)) { |
| 2854 | /* remove file/directory */ |
| 2855 | if (mapping->mode & MODE_DIRECTORY) { |
| 2856 | int j, next_dir_index = s->directory.next, |
| 2857 | first_dir_index = mapping->info.dir.first_dir_index; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2858 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2859 | if (rmdir(mapping->path) < 0) { |
| 2860 | if (errno == ENOTEMPTY) { |
| 2861 | deferred++; |
| 2862 | continue; |
| 2863 | } else |
| 2864 | return -5; |
| 2865 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2866 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2867 | for (j = 1; j < s->mapping.next; j++) { |
| 2868 | mapping_t* m = array_get(&(s->mapping), j); |
| 2869 | if (m->mode & MODE_DIRECTORY && |
| 2870 | m->info.dir.first_dir_index > |
| 2871 | first_dir_index && |
| 2872 | m->info.dir.first_dir_index < |
| 2873 | next_dir_index) |
| 2874 | next_dir_index = |
| 2875 | m->info.dir.first_dir_index; |
| 2876 | } |
| 2877 | remove_direntries(s, first_dir_index, |
| 2878 | next_dir_index - first_dir_index); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2879 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2880 | deleted++; |
| 2881 | } |
| 2882 | } else { |
| 2883 | if (unlink(mapping->path)) |
| 2884 | return -4; |
| 2885 | deleted++; |
| 2886 | } |
| 2887 | DLOG(fprintf(stderr, "DELETE (%d)\n", i); print_mapping(mapping); print_direntry(entry)); |
| 2888 | remove_mapping(s, i); |
| 2889 | } |
| 2890 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2891 | } |
| 2892 | |
| 2893 | return 0; |
| 2894 | } |
| 2895 | |
| 2896 | /* |
| 2897 | * synchronize mapping with new state: |
| 2898 | * |
| 2899 | * - copy FAT (with bdrv_read) |
| 2900 | * - mark all filenames corresponding to mappings as deleted |
| 2901 | * - recurse direntries from root (using bs->bdrv_read) |
| 2902 | * - delete files corresponding to mappings marked as deleted |
| 2903 | */ |
| 2904 | static int do_commit(BDRVVVFATState* s) |
| 2905 | { |
| 2906 | int ret = 0; |
| 2907 | |
| 2908 | /* the real meat are the commits. Nothing to do? Move along! */ |
| 2909 | if (s->commits.next == 0) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2910 | return 0; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2911 | |
| 2912 | vvfat_close_current_file(s); |
| 2913 | |
| 2914 | ret = handle_renames_and_mkdirs(s); |
| 2915 | if (ret) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2916 | fprintf(stderr, "Error handling renames (%d)\n", ret); |
Blue Swirl | 43dc2a6 | 2010-03-18 18:41:57 +0000 | [diff] [blame] | 2917 | abort(); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2918 | return ret; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2919 | } |
| 2920 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 2921 | /* copy FAT (with bdrv_read) */ |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2922 | memcpy(s->fat.pointer, s->fat2, 0x200 * s->sectors_per_fat); |
| 2923 | |
| 2924 | /* recurse direntries from root (using bs->bdrv_read) */ |
| 2925 | ret = commit_direntries(s, 0, -1); |
| 2926 | if (ret) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2927 | fprintf(stderr, "Fatal: error while committing (%d)\n", ret); |
Blue Swirl | 43dc2a6 | 2010-03-18 18:41:57 +0000 | [diff] [blame] | 2928 | abort(); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2929 | return ret; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2930 | } |
| 2931 | |
| 2932 | ret = handle_commits(s); |
| 2933 | if (ret) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2934 | fprintf(stderr, "Error handling commits (%d)\n", ret); |
Blue Swirl | 43dc2a6 | 2010-03-18 18:41:57 +0000 | [diff] [blame] | 2935 | abort(); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2936 | return ret; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2937 | } |
| 2938 | |
| 2939 | ret = handle_deletes(s); |
| 2940 | if (ret) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2941 | fprintf(stderr, "Error deleting\n"); |
Blue Swirl | 43dc2a6 | 2010-03-18 18:41:57 +0000 | [diff] [blame] | 2942 | abort(); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2943 | return ret; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2944 | } |
| 2945 | |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 2946 | if (s->qcow->bs->drv->bdrv_make_empty) { |
| 2947 | s->qcow->bs->drv->bdrv_make_empty(s->qcow->bs); |
Kevin Wolf | 7704df9 | 2011-11-08 10:50:12 +0100 | [diff] [blame] | 2948 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2949 | |
| 2950 | memset(s->used_clusters, 0, sector2cluster(s, s->sector_count)); |
| 2951 | |
| 2952 | DLOG(checkpoint()); |
| 2953 | return 0; |
| 2954 | } |
| 2955 | |
| 2956 | static int try_commit(BDRVVVFATState* s) |
| 2957 | { |
| 2958 | vvfat_close_current_file(s); |
| 2959 | DLOG(checkpoint()); |
| 2960 | if(!is_consistent(s)) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2961 | return -1; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2962 | return do_commit(s); |
| 2963 | } |
| 2964 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 2965 | static int vvfat_write(BlockDriverState *bs, int64_t sector_num, |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2966 | const uint8_t *buf, int nb_sectors) |
| 2967 | { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 2968 | BDRVVVFATState *s = bs->opaque; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2969 | int i, ret; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2970 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2971 | DLOG(checkpoint()); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2972 | |
Kevin Wolf | ac48e38 | 2010-09-10 12:27:02 +0200 | [diff] [blame] | 2973 | /* Check if we're operating in read-only mode */ |
| 2974 | if (s->qcow == NULL) { |
| 2975 | return -EACCES; |
| 2976 | } |
| 2977 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2978 | vvfat_close_current_file(s); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2979 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2980 | /* |
| 2981 | * Some sanity checks: |
| 2982 | * - do not allow writing to the boot sector |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2983 | */ |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2984 | |
Hervé Poussineau | 4dc705d | 2017-05-22 23:11:57 +0200 | [diff] [blame] | 2985 | if (sector_num < s->offset_to_fat) |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2986 | return -1; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2987 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 2988 | for (i = sector2cluster(s, sector_num); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2989 | i <= sector2cluster(s, sector_num + nb_sectors - 1);) { |
| 2990 | mapping_t* mapping = find_mapping_for_cluster(s, i); |
| 2991 | if (mapping) { |
| 2992 | if (mapping->read_only) { |
| 2993 | fprintf(stderr, "Tried to write to write-protected file %s\n", |
| 2994 | mapping->path); |
| 2995 | return -1; |
| 2996 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 2997 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 2998 | if (mapping->mode & MODE_DIRECTORY) { |
| 2999 | int begin = cluster2sector(s, i); |
| 3000 | int end = begin + s->sectors_per_cluster, k; |
| 3001 | int dir_index; |
| 3002 | const direntry_t* direntries; |
| 3003 | long_file_name lfn; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 3004 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 3005 | lfn_init(&lfn); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 3006 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 3007 | if (begin < sector_num) |
| 3008 | begin = sector_num; |
| 3009 | if (end > sector_num + nb_sectors) |
| 3010 | end = sector_num + nb_sectors; |
| 3011 | dir_index = mapping->dir_index + |
| 3012 | 0x10 * (begin - mapping->begin * s->sectors_per_cluster); |
| 3013 | direntries = (direntry_t*)(buf + 0x200 * (begin - sector_num)); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 3014 | |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 3015 | for (k = 0; k < (end - begin) * 0x10; k++) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 3016 | /* no access to the direntry of a read-only file */ |
Hervé Poussineau | e03da26 | 2017-07-15 15:28:40 +0200 | [diff] [blame] | 3017 | if (is_short_name(direntries + k) && |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 3018 | (direntries[k].attributes & 1)) { |
| 3019 | if (memcmp(direntries + k, |
| 3020 | array_get(&(s->directory), dir_index + k), |
| 3021 | sizeof(direntry_t))) { |
Alistair Francis | 2ab4b13 | 2017-09-11 12:52:50 -0700 | [diff] [blame] | 3022 | warn_report("tried to write to write-protected " |
| 3023 | "file"); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 3024 | return -1; |
| 3025 | } |
| 3026 | } |
| 3027 | } |
| 3028 | } |
| 3029 | i = mapping->end; |
| 3030 | } else |
| 3031 | i++; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 3032 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3033 | |
| 3034 | /* |
| 3035 | * Use qcow backend. Commit later. |
| 3036 | */ |
| 3037 | DLOG(fprintf(stderr, "Write to qcow backend: %d + %d\n", (int)sector_num, nb_sectors)); |
Kevin Wolf | 18d51c4 | 2016-05-31 14:42:08 +0200 | [diff] [blame] | 3038 | ret = bdrv_write(s->qcow, sector_num, buf, nb_sectors); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3039 | if (ret < 0) { |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 3040 | fprintf(stderr, "Error writing to qcow backend\n"); |
| 3041 | return ret; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3042 | } |
| 3043 | |
| 3044 | for (i = sector2cluster(s, sector_num); |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 3045 | i <= sector2cluster(s, sector_num + nb_sectors - 1); i++) |
| 3046 | if (i >= 0) |
| 3047 | s->used_clusters[i] |= USED_ALLOCATED; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3048 | |
| 3049 | DLOG(checkpoint()); |
| 3050 | /* TODO: add timeout */ |
| 3051 | try_commit(s); |
| 3052 | |
| 3053 | DLOG(checkpoint()); |
| 3054 | return 0; |
| 3055 | } |
| 3056 | |
Kevin Wolf | 4575eb4 | 2016-04-26 17:14:08 +0200 | [diff] [blame] | 3057 | static int coroutine_fn |
| 3058 | vvfat_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, |
| 3059 | QEMUIOVector *qiov, int flags) |
Paolo Bonzini | e183ef7 | 2011-10-20 13:16:23 +0200 | [diff] [blame] | 3060 | { |
| 3061 | int ret; |
| 3062 | BDRVVVFATState *s = bs->opaque; |
Kevin Wolf | 4575eb4 | 2016-04-26 17:14:08 +0200 | [diff] [blame] | 3063 | uint64_t sector_num = offset >> BDRV_SECTOR_BITS; |
| 3064 | int nb_sectors = bytes >> BDRV_SECTOR_BITS; |
| 3065 | void *buf; |
| 3066 | |
| 3067 | assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0); |
| 3068 | assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0); |
| 3069 | |
| 3070 | buf = g_try_malloc(bytes); |
| 3071 | if (bytes && buf == NULL) { |
| 3072 | return -ENOMEM; |
| 3073 | } |
| 3074 | qemu_iovec_to_buf(qiov, 0, buf, bytes); |
| 3075 | |
Paolo Bonzini | e183ef7 | 2011-10-20 13:16:23 +0200 | [diff] [blame] | 3076 | qemu_co_mutex_lock(&s->lock); |
| 3077 | ret = vvfat_write(bs, sector_num, buf, nb_sectors); |
| 3078 | qemu_co_mutex_unlock(&s->lock); |
Kevin Wolf | 4575eb4 | 2016-04-26 17:14:08 +0200 | [diff] [blame] | 3079 | |
| 3080 | g_free(buf); |
| 3081 | |
Paolo Bonzini | e183ef7 | 2011-10-20 13:16:23 +0200 | [diff] [blame] | 3082 | return ret; |
| 3083 | } |
| 3084 | |
Paolo Bonzini | b6b8a33 | 2013-09-04 19:00:28 +0200 | [diff] [blame] | 3085 | static int64_t coroutine_fn vvfat_co_get_block_status(BlockDriverState *bs, |
Hervé Poussineau | d6a7e54 | 2017-05-22 23:11:54 +0200 | [diff] [blame] | 3086 | int64_t sector_num, int nb_sectors, int *n, BlockDriverState **file) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3087 | { |
Hervé Poussineau | 139921a | 2017-05-22 23:11:53 +0200 | [diff] [blame] | 3088 | *n = bs->total_sectors - sector_num; |
Paolo Bonzini | 4bc74be | 2013-09-04 19:00:30 +0200 | [diff] [blame] | 3089 | if (*n > nb_sectors) { |
| 3090 | *n = nb_sectors; |
| 3091 | } else if (*n < 0) { |
| 3092 | return 0; |
| 3093 | } |
| 3094 | return BDRV_BLOCK_DATA; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3095 | } |
| 3096 | |
Kevin Wolf | 4575eb4 | 2016-04-26 17:14:08 +0200 | [diff] [blame] | 3097 | static int coroutine_fn |
| 3098 | write_target_commit(BlockDriverState *bs, uint64_t offset, uint64_t bytes, |
| 3099 | QEMUIOVector *qiov, int flags) |
| 3100 | { |
Paolo Bonzini | 254aee4 | 2017-06-29 15:27:43 +0200 | [diff] [blame] | 3101 | int ret; |
| 3102 | |
Kevin Wolf | 9217e26 | 2010-09-10 12:27:03 +0200 | [diff] [blame] | 3103 | BDRVVVFATState* s = *((BDRVVVFATState**) bs->opaque); |
Paolo Bonzini | 254aee4 | 2017-06-29 15:27:43 +0200 | [diff] [blame] | 3104 | qemu_co_mutex_lock(&s->lock); |
| 3105 | ret = try_commit(s); |
| 3106 | qemu_co_mutex_unlock(&s->lock); |
| 3107 | |
| 3108 | return ret; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3109 | } |
| 3110 | |
| 3111 | static void write_target_close(BlockDriverState *bs) { |
Kevin Wolf | 9217e26 | 2010-09-10 12:27:03 +0200 | [diff] [blame] | 3112 | BDRVVVFATState* s = *((BDRVVVFATState**) bs->opaque); |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 3113 | bdrv_unref_child(s->bs, s->qcow); |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 3114 | g_free(s->qcow_filename); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3115 | } |
| 3116 | |
| 3117 | static BlockDriver vvfat_write_target = { |
Christoph Hellwig | f9e9643 | 2009-05-27 16:14:13 +0200 | [diff] [blame] | 3118 | .format_name = "vvfat_write_target", |
Kevin Wolf | a8a4d15 | 2017-02-15 20:51:58 +0100 | [diff] [blame] | 3119 | .instance_size = sizeof(void*), |
Kevin Wolf | 4575eb4 | 2016-04-26 17:14:08 +0200 | [diff] [blame] | 3120 | .bdrv_co_pwritev = write_target_commit, |
Christoph Hellwig | f9e9643 | 2009-05-27 16:14:13 +0200 | [diff] [blame] | 3121 | .bdrv_close = write_target_close, |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3122 | }; |
| 3123 | |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 3124 | static void vvfat_qcow_options(int *child_flags, QDict *child_options, |
| 3125 | int parent_flags, QDict *parent_options) |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3126 | { |
Alberto Garcia | f87a0e2 | 2016-09-15 17:53:02 +0300 | [diff] [blame] | 3127 | qdict_set_default_str(child_options, BDRV_OPT_READ_ONLY, "off"); |
| 3128 | *child_flags = BDRV_O_NO_FLUSH; |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 3129 | } |
| 3130 | |
| 3131 | static const BdrvChildRole child_vvfat_qcow = { |
| 3132 | .inherit_options = vvfat_qcow_options, |
| 3133 | }; |
| 3134 | |
| 3135 | static int enable_write_target(BlockDriverState *bs, Error **errp) |
| 3136 | { |
| 3137 | BDRVVVFATState *s = bs->opaque; |
Chunyan Liu | facdbb0 | 2014-06-05 17:20:52 +0800 | [diff] [blame] | 3138 | BlockDriver *bdrv_qcow = NULL; |
Kevin Wolf | 5db15a5 | 2015-09-14 15:33:33 +0200 | [diff] [blame] | 3139 | BlockDriverState *backing; |
Chunyan Liu | facdbb0 | 2014-06-05 17:20:52 +0800 | [diff] [blame] | 3140 | QemuOpts *opts = NULL; |
Kevin Wolf | a655211 | 2010-09-10 12:27:04 +0200 | [diff] [blame] | 3141 | int ret; |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3142 | int size = sector2cluster(s, s->sector_count); |
Max Reitz | e664171 | 2015-08-26 19:47:48 +0200 | [diff] [blame] | 3143 | QDict *options; |
| 3144 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3145 | s->used_clusters = calloc(size, 1); |
| 3146 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 3147 | array_init(&(s->commits), sizeof(commit_t)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3148 | |
Jeff Cody | 9a29e18 | 2015-01-22 08:03:30 -0500 | [diff] [blame] | 3149 | s->qcow_filename = g_malloc(PATH_MAX); |
| 3150 | ret = get_tmp_filename(s->qcow_filename, PATH_MAX); |
Jim Meyering | eba2505 | 2012-05-28 09:27:54 +0200 | [diff] [blame] | 3151 | if (ret < 0) { |
Markus Armbruster | 68c70af | 2014-05-16 11:00:17 +0200 | [diff] [blame] | 3152 | error_setg_errno(errp, -ret, "can't create temporary file"); |
Fam Zheng | 78f27bd | 2013-07-17 17:57:37 +0800 | [diff] [blame] | 3153 | goto err; |
Jim Meyering | eba2505 | 2012-05-28 09:27:54 +0200 | [diff] [blame] | 3154 | } |
Kevin Wolf | 91a073a | 2009-05-27 14:48:06 +0200 | [diff] [blame] | 3155 | |
| 3156 | bdrv_qcow = bdrv_find_format("qcow"); |
Max Reitz | 1bcb15c | 2014-12-02 18:32:43 +0100 | [diff] [blame] | 3157 | if (!bdrv_qcow) { |
| 3158 | error_setg(errp, "Failed to locate qcow driver"); |
| 3159 | ret = -ENOENT; |
| 3160 | goto err; |
| 3161 | } |
| 3162 | |
Chunyan Liu | c282e1f | 2014-06-05 17:21:11 +0800 | [diff] [blame] | 3163 | opts = qemu_opts_create(bdrv_qcow->create_opts, NULL, 0, &error_abort); |
Markus Armbruster | 39101f2 | 2015-02-12 16:46:36 +0100 | [diff] [blame] | 3164 | qemu_opt_set_number(opts, BLOCK_OPT_SIZE, s->sector_count * 512, |
| 3165 | &error_abort); |
Markus Armbruster | f43e47d | 2015-02-12 17:52:20 +0100 | [diff] [blame] | 3166 | qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, "fat:", &error_abort); |
Kevin Wolf | 91a073a | 2009-05-27 14:48:06 +0200 | [diff] [blame] | 3167 | |
Chunyan Liu | c282e1f | 2014-06-05 17:21:11 +0800 | [diff] [blame] | 3168 | ret = bdrv_create(bdrv_qcow, s->qcow_filename, opts, errp); |
Chunyan Liu | facdbb0 | 2014-06-05 17:20:52 +0800 | [diff] [blame] | 3169 | qemu_opts_del(opts); |
Fam Zheng | 78f27bd | 2013-07-17 17:57:37 +0800 | [diff] [blame] | 3170 | if (ret < 0) { |
| 3171 | goto err; |
| 3172 | } |
Kevin Wolf | a655211 | 2010-09-10 12:27:04 +0200 | [diff] [blame] | 3173 | |
Max Reitz | e664171 | 2015-08-26 19:47:48 +0200 | [diff] [blame] | 3174 | options = qdict_new(); |
Eric Blake | 46f5ac2 | 2017-04-27 16:58:17 -0500 | [diff] [blame] | 3175 | qdict_put_str(options, "write-target.driver", "qcow"); |
Kevin Wolf | eecc774 | 2016-05-30 17:13:09 +0200 | [diff] [blame] | 3176 | s->qcow = bdrv_open_child(s->qcow_filename, options, "write-target", bs, |
| 3177 | &child_vvfat_qcow, false, errp); |
Max Reitz | c4b48bf | 2016-07-11 15:54:52 +0200 | [diff] [blame] | 3178 | QDECREF(options); |
Max Reitz | 5b36393 | 2016-05-17 16:41:31 +0200 | [diff] [blame] | 3179 | if (!s->qcow) { |
| 3180 | ret = -EINVAL; |
Fam Zheng | 78f27bd | 2013-07-17 17:57:37 +0800 | [diff] [blame] | 3181 | goto err; |
Kevin Wolf | d6e9098 | 2010-03-31 14:40:27 +0200 | [diff] [blame] | 3182 | } |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3183 | |
| 3184 | #ifndef _WIN32 |
| 3185 | unlink(s->qcow_filename); |
| 3186 | #endif |
| 3187 | |
Kevin Wolf | a8a4d15 | 2017-02-15 20:51:58 +0100 | [diff] [blame] | 3188 | backing = bdrv_new_open_driver(&vvfat_write_target, NULL, BDRV_O_ALLOW_RDWR, |
| 3189 | &error_abort); |
| 3190 | *(void**) backing->opaque = s; |
| 3191 | |
Kevin Wolf | 12fa4af | 2017-02-17 20:42:32 +0100 | [diff] [blame] | 3192 | bdrv_set_backing_hd(s->bs, backing, &error_abort); |
Kevin Wolf | 5db15a5 | 2015-09-14 15:33:33 +0200 | [diff] [blame] | 3193 | bdrv_unref(backing); |
| 3194 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 3195 | return 0; |
Fam Zheng | 78f27bd | 2013-07-17 17:57:37 +0800 | [diff] [blame] | 3196 | |
| 3197 | err: |
| 3198 | g_free(s->qcow_filename); |
| 3199 | s->qcow_filename = NULL; |
| 3200 | return ret; |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 3201 | } |
| 3202 | |
Kevin Wolf | 91ef382 | 2016-12-20 16:23:46 +0100 | [diff] [blame] | 3203 | static void vvfat_child_perm(BlockDriverState *bs, BdrvChild *c, |
| 3204 | const BdrvChildRole *role, |
Kevin Wolf | e0995dc | 2017-09-14 12:47:11 +0200 | [diff] [blame] | 3205 | BlockReopenQueue *reopen_queue, |
Kevin Wolf | 91ef382 | 2016-12-20 16:23:46 +0100 | [diff] [blame] | 3206 | uint64_t perm, uint64_t shared, |
| 3207 | uint64_t *nperm, uint64_t *nshared) |
| 3208 | { |
| 3209 | BDRVVVFATState *s = bs->opaque; |
| 3210 | |
| 3211 | assert(c == s->qcow || role == &child_backing); |
| 3212 | |
| 3213 | if (c == s->qcow) { |
| 3214 | /* This is a private node, nobody should try to attach to it */ |
| 3215 | *nperm = BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE; |
| 3216 | *nshared = BLK_PERM_WRITE_UNCHANGED; |
| 3217 | } else { |
| 3218 | /* The backing file is there so 'commit' can use it. vvfat doesn't |
| 3219 | * access it in any way. */ |
| 3220 | *nperm = 0; |
| 3221 | *nshared = BLK_PERM_ALL; |
| 3222 | } |
| 3223 | } |
| 3224 | |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 3225 | static void vvfat_close(BlockDriverState *bs) |
| 3226 | { |
| 3227 | BDRVVVFATState *s = bs->opaque; |
| 3228 | |
| 3229 | vvfat_close_current_file(s); |
| 3230 | array_free(&(s->fat)); |
| 3231 | array_free(&(s->directory)); |
| 3232 | array_free(&(s->mapping)); |
Stefan Weil | ce13782 | 2011-09-30 23:29:53 +0200 | [diff] [blame] | 3233 | g_free(s->cluster_buffer); |
Kevin Wolf | 3397f0c | 2011-11-22 16:52:13 +0100 | [diff] [blame] | 3234 | |
| 3235 | if (s->qcow) { |
| 3236 | migrate_del_blocker(s->migration_blocker); |
| 3237 | error_free(s->migration_blocker); |
| 3238 | } |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 3239 | } |
| 3240 | |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 3241 | static BlockDriver bdrv_vvfat = { |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 3242 | .format_name = "vvfat", |
| 3243 | .protocol_name = "fat", |
| 3244 | .instance_size = sizeof(BDRVVVFATState), |
| 3245 | |
| 3246 | .bdrv_parse_filename = vvfat_parse_filename, |
| 3247 | .bdrv_file_open = vvfat_open, |
Eric Blake | a650648 | 2016-06-23 16:37:17 -0600 | [diff] [blame] | 3248 | .bdrv_refresh_limits = vvfat_refresh_limits, |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 3249 | .bdrv_close = vvfat_close, |
Kevin Wolf | 91ef382 | 2016-12-20 16:23:46 +0100 | [diff] [blame] | 3250 | .bdrv_child_perm = vvfat_child_perm, |
Kevin Wolf | 7ad9be6 | 2013-04-12 19:42:04 +0200 | [diff] [blame] | 3251 | |
Kevin Wolf | 4575eb4 | 2016-04-26 17:14:08 +0200 | [diff] [blame] | 3252 | .bdrv_co_preadv = vvfat_co_preadv, |
| 3253 | .bdrv_co_pwritev = vvfat_co_pwritev, |
Paolo Bonzini | b6b8a33 | 2013-09-04 19:00:28 +0200 | [diff] [blame] | 3254 | .bdrv_co_get_block_status = vvfat_co_get_block_status, |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 3255 | }; |
| 3256 | |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 3257 | static void bdrv_vvfat_init(void) |
| 3258 | { |
| 3259 | bdrv_register(&bdrv_vvfat); |
| 3260 | } |
| 3261 | |
| 3262 | block_init(bdrv_vvfat_init); |
| 3263 | |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3264 | #ifdef DEBUG |
Thomas Huth | 7a6ab45 | 2017-09-13 12:21:28 +0200 | [diff] [blame] | 3265 | static void checkpoint(void) |
| 3266 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 3267 | assert(((mapping_t*)array_get(&(vvv->mapping), 0))->end == 2); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3268 | check1(vvv); |
| 3269 | check2(vvv); |
| 3270 | assert(!vvv->current_mapping || vvv->current_fd || (vvv->current_mapping->mode & MODE_DIRECTORY)); |
bellard | a046433 | 2005-12-18 18:29:50 +0000 | [diff] [blame] | 3271 | } |
| 3272 | #endif |