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vvfat: fix field names in FAT12/FAT16 and FAT32 boot sectors

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Specification: "FAT: General overview of on-disk format" v1.03, pages 11-13
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Hervé Poussineau 2017-05-22 23:11:58 +02:00 committed by Kevin Wolf
parent 4dc705dc7e
commit 92e28d8220
1 changed files with 14 additions and 7 deletions
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21
block/vvfat.c
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@ -217,23 +217,30 @@ typedef struct bootsector_t {
union {
struct {
uint8_t drive_number;
uint8_t current_head;
uint8_t reserved1;
uint8_t signature;
uint32_t id;
uint8_t volume_label[11];
uint8_t fat_type[8];
uint8_t ignored[0x1c0];
} QEMU_PACKED fat16;
struct {
uint32_t sectors_per_fat;
uint16_t flags;
uint8_t major,minor;
uint32_t first_cluster_of_root_directory;
uint32_t first_cluster_of_root_dir;
uint16_t info_sector;
uint16_t backup_boot_sector;
uint16_t ignored;
uint8_t reserved[12];
uint8_t drive_number;
uint8_t reserved1;
uint8_t signature;
uint32_t id;
uint8_t volume_label[11];
uint8_t fat_type[8];
uint8_t ignored[0x1a4];
} QEMU_PACKED fat32;
} u;
uint8_t fat_type[8];
uint8_t ignored[0x1c0];
uint8_t magic[2];
} QEMU_PACKED bootsector_t;
@ -973,13 +980,13 @@ static int init_directories(BDRVVVFATState* s,
/* LATER TODO: if FAT32, this is wrong */
/* drive_number: fda=0, hda=0x80 */
bootsector->u.fat16.drive_number = s->offset_to_bootsector == 0 ? 0 : 0x80;
bootsector->u.fat16.current_head=0;
bootsector->u.fat16.signature=0x29;
bootsector->u.fat16.id=cpu_to_le32(0xfabe1afd);
memcpy(bootsector->u.fat16.volume_label, s->volume_label,
sizeof(bootsector->u.fat16.volume_label));
memcpy(bootsector->fat_type,(s->fat_type==12?"FAT12 ":s->fat_type==16?"FAT16 ":"FAT32 "),8);
memcpy(bootsector->u.fat16.fat_type,
s->fat_type == 12 ? "FAT12 " : "FAT16 ", 8);
bootsector->magic[0]=0x55; bootsector->magic[1]=0xaa;
return 0;