1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12 #ifndef _LINUX_MSDOS_FS_H 13 #define _LINUX_MSDOS_FS_H 14 15 #include <linux/magic.h> 16 17 #include <asm/byteorder.h> 18 19 #define SECTOR_SIZE 512 20 #define SECTOR_BITS 9 21 #define MSDOS_DPB (MSDOS_DPS) 22 #define MSDOS_DPB_BITS 4 23 #define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry)) 24 #define MSDOS_DPS_BITS 4 25 #define CF_LE_W(v) le16_to_cpu(v) 26 #define CF_LE_L(v) le32_to_cpu(v) 27 #define CT_LE_W(v) cpu_to_le16(v) 28 #define CT_LE_L(v) cpu_to_le32(v) 29 30 #define MSDOS_ROOT_INO 1 31 #define MSDOS_DIR_BITS 5 32 33 #define FAT_MAX_DIR_ENTRIES (65536) 34 #define FAT_MAX_DIR_SIZE (FAT_MAX_DIR_ENTRIES << MSDOS_DIR_BITS) 35 36 #define ATTR_NONE 0 37 #define ATTR_RO 1 38 #define ATTR_HIDDEN 2 39 #define ATTR_SYS 4 40 #define ATTR_VOLUME 8 41 #define ATTR_DIR 16 42 #define ATTR_ARCH 32 43 44 #define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN) 45 46 #define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME) 47 48 #define CASE_LOWER_BASE 8 49 #define CASE_LOWER_EXT 16 50 51 #define DELETED_FLAG 0xe5 52 #define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG) 53 54 #define MSDOS_VALID_MODE (S_IFREG | S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO) 55 56 #define MSDOS_MKMODE(a, m) (m & (a & ATTR_RO ? S_IRUGO|S_IXUGO : S_IRWXUGO)) 57 58 #define MSDOS_NAME 11 59 #define MSDOS_LONGNAME 256 60 #define MSDOS_SLOTS 21 61 #define MSDOS_DOT ". " 62 #define MSDOS_DOTDOT ".. " 63 64 #define FAT_VALID_MEDIA(x) ((0xF8 <= (x) && (x) <= 0xFF) || (x) == 0xF0) 65 #define FAT_FIRST_ENT(s, x) ((MSDOS_SB(s)->fat_bits == 32 ? 0x0FFFFF00 : MSDOS_SB(s)->fat_bits == 16 ? 0xFF00 : 0xF00) | (x)) 66 67 #define FAT_START_ENT 2 68 69 #define MAX_FAT12 0xFF4 70 #define MAX_FAT16 0xFFF4 71 #define MAX_FAT32 0x0FFFFFF6 72 #define MAX_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? MAX_FAT32 : MSDOS_SB(s)->fat_bits == 16 ? MAX_FAT16 : MAX_FAT12) 73 74 #define BAD_FAT12 0xFF7 75 #define BAD_FAT16 0xFFF7 76 #define BAD_FAT32 0x0FFFFFF7 77 78 #define EOF_FAT12 0xFFF 79 #define EOF_FAT16 0xFFFF 80 #define EOF_FAT32 0x0FFFFFFF 81 82 #define FAT_ENT_FREE (0) 83 #define FAT_ENT_BAD (BAD_FAT32) 84 #define FAT_ENT_EOF (EOF_FAT32) 85 86 #define FAT_FSINFO_SIG1 0x41615252 87 #define FAT_FSINFO_SIG2 0x61417272 88 #define IS_FSINFO(x) (le32_to_cpu((x)->signature1) == FAT_FSINFO_SIG1 && le32_to_cpu((x)->signature2) == FAT_FSINFO_SIG2) 89 90 #define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct dirent [2]) 91 #define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct dirent [2]) 92 93 #define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, __u32) 94 #define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, __u32) 95 #define VFAT_IOCTL_GET_VOLUME_ID _IOR('r', 0x12, __u32) 96 97 #define VFAT_SFN_DISPLAY_LOWER 0x0001 98 #define VFAT_SFN_DISPLAY_WIN95 0x0002 99 #define VFAT_SFN_DISPLAY_WINNT 0x0004 100 #define VFAT_SFN_CREATE_WIN95 0x0100 101 #define VFAT_SFN_CREATE_WINNT 0x0200 102 103 struct fat_boot_sector { 104 __u8 ignored[3]; 105 __u8 system_id[8]; 106 __u8 sector_size[2]; 107 __u8 sec_per_clus; 108 __le16 reserved; 109 __u8 fats; 110 __u8 dir_entries[2]; 111 __u8 sectors[2]; 112 __u8 media; 113 __le16 fat_length; 114 __le16 secs_track; 115 __le16 heads; 116 __le32 hidden; 117 __le32 total_sect; 118 119 __le32 fat32_length; 120 __le16 flags; 121 __u8 version[2]; 122 __le32 root_cluster; 123 __le16 info_sector; 124 __le16 backup_boot; 125 __le16 reserved2[6]; 126 }; 127 128 struct fat_boot_fsinfo { 129 __le32 signature1; 130 __le32 reserved1[120]; 131 __le32 signature2; 132 __le32 free_clusters; 133 __le32 next_cluster; 134 __le32 reserved2[4]; 135 }; 136 137 struct fat_boot_bsx { 138 __u8 drive; 139 __u8 reserved1; 140 __u8 signature; 141 __u8 vol_id[4]; 142 __u8 vol_label[11]; 143 __u8 type[8]; 144 }; 145 #define FAT16_BSX_OFFSET 36 146 #define FAT32_BSX_OFFSET 64 147 148 struct msdos_dir_entry { 149 __u8 name[MSDOS_NAME]; 150 __u8 attr; 151 __u8 lcase; 152 __u8 ctime_cs; 153 __le16 ctime; 154 __le16 cdate; 155 __le16 adate; 156 __le16 starthi; 157 __le16 time,date,start; 158 __le32 size; 159 }; 160 161 struct msdos_dir_slot { 162 __u8 id; 163 __u8 name0_4[10]; 164 __u8 attr; 165 __u8 reserved; 166 __u8 alias_checksum; 167 __u8 name5_10[12]; 168 __le16 start; 169 __u8 name11_12[4]; 170 }; 171 172 struct fat_slot_info { 173 loff_t i_pos; 174 loff_t slot_off; 175 int nr_slots; 176 struct msdos_dir_entry *de; 177 struct buffer_head *bh; 178 }; 179 180 #endif 181