diff options
Diffstat (limited to 'Source/Kernel/FileSystems/FAT/FATFS.class.h')
| -rw-r--r-- | Source/Kernel/FileSystems/FAT/FATFS.class.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/Source/Kernel/FileSystems/FAT/FATFS.class.h b/Source/Kernel/FileSystems/FAT/FATFS.class.h new file mode 100644 index 0000000..50ff479 --- /dev/null +++ b/Source/Kernel/FileSystems/FAT/FATFS.class.h @@ -0,0 +1,130 @@ +#ifndef DEF_FATFS_CLASS_H +#define DEF_FATFS_CLASS_H + +#include <VFS/FileSystem.proto.h> +#include <VFS/Part.ns.h> + +struct fat_extBS_32_t { //Extended boot sector for FAT32 + unsigned int table_size_32; + unsigned short extended_flags; + unsigned short fat_version; + unsigned int root_cluster; + unsigned short fat_info; + unsigned short backup_BS_sector; + unsigned char reserved_0[12]; + unsigned char drive_number; + unsigned char reserved_1; + unsigned char boot_signature; + unsigned int volume_id; + unsigned char volume_label[11]; + unsigned char fat_type_label[8]; +}__attribute__((packed)); + +struct fat_extBS_16_t { //Extended boot sector for FAT12 and FAT16 + unsigned char bios_drive_num; + unsigned char reserved1; + unsigned char boot_signature; + unsigned int volume_id; + unsigned char volume_label[11]; + unsigned char fat_type_label[8]; +}__attribute__((packed)); + +struct fat_BS_t { //Boot sector + unsigned char bootjmp[3]; + unsigned char oem_name[8]; + unsigned short bytes_per_sector; + unsigned char sectors_per_cluster; + unsigned short reserved_sector_count; + unsigned char table_count; + unsigned short root_entry_count; + unsigned short total_sectors_16; + unsigned char media_type; + unsigned short table_size_16; + unsigned short sectors_per_track; + unsigned short head_side_count; + unsigned int hidden_sector_count; + unsigned int total_sectors_32; + union { + fat_extBS_32_t extBS_32; + fat_extBS_16_t extBS_16; + }; +}__attribute__((packed)); + +struct fat_date_t { + u16int year : 7; + u16int month : 4; + u16int day : 5; +}__attribute__((packed)); + +struct fat_time_t { + u16int hour : 5; + u16int minutes : 6; + u16int seconds : 5; +}__attribute__((packed)); + +struct fat_dir_entry_t { + char name[8]; + char extension[3]; + u8int attributes; + u8int reserved; + u8int createtenthsofseconds; + fat_time_t created_time; + fat_date_t created_date; + fat_date_t accessed_date; + u16int first_clust_high; //always 0 on FAT12/16 + fat_time_t modified_time; + fat_date_t modified_date; + u16int first_clust_low; + u32int size; +}__attribute__((packed)); + +#define FA_READONLY 0x01 +#define FA_HIDDEN 0x02 +#define FA_SYSTEM 0x04 +#define FA_VOLUMEID 0x08 +#define FA_DIRECTORY 0x10 +#define FA_ARCHIVE 0x20 +#define FA_LFN 0x0F + +class FATFS : public FileSystem { + private: + FATFS() {} + ~FATFS() {} + + fat_BS_t m_bs; + bool m_readOnly; + u32int m_fatSize; //Size of one FAT, in sectors + u32int m_totalSectors; //Total sectors used by the FAT + u32int m_rootDirSectors; //Sectors used by the root directory + u32int m_firstDataSector; //First data sector, start of cluster 2 + u32int m_countOfClusters; //Count of usable clusters, EXCLUDING the ones used by the root directory + u32int m_clusterSize; //size of a cluster in bytes + u32int m_fatType; //12, 16 or 32 + Partition* m_part; + + u32int nextCluster(u32int cluster); //Get the next cluster number in the chain (0 = EOF) + void readCluster(u32int cluster, u8int* data); //Read the content of a cluster to a buffer + + public: + static FATFS* mount(Partition* p, DirectoryNode* mountpoint); + + bool unmount(); + + bool setName(FSNode* node, String name); + bool setPermissions(FSNode* node, u32int permissions); + bool setUid(FSNode* node, u32int uid); + bool setGid(FSNode* node, u32int gid); + bool setParent(FSNode* node, FSNode* parent); + + u32int read(FileNode* file, u64int position, u32int max_length, u8int *data); + bool write(FileNode* file, u64int position, u32int length, u8int *data); + bool truncate(FileNode* file); + + bool loadContents(DirectoryNode* dir); + FileNode* createFile(DirectoryNode* parent, String name); + DirectoryNode* createDirectory(DirectoryNode* parent, String name); + bool remove(DirectoryNode* parent, FSNode* node); +}; + +#endif + |