superblock.h

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#ifndef __SOFS19_SUPERBLOCK__
#define __SOFS19_SUPERBLOCK__
 
#include <inttypes.h>
 
namespace sofs19
{
 
#define MAGIC_NUMBER 0x50F5
 
#define VERSION_NUMBER 0x2019
 
#define PARTITION_NAME_SIZE 21
 
#define HEAD_CACHE_SIZE 64
 
#define TAIL_CACHE_SIZE 170
 
    struct SOSuperBlock
    {
 
        uint16_t magic;
 
        uint16_t version;
 
        char name[PARTITION_NAME_SIZE + 1];
 
        uint8_t mntstat;
 
        uint8_t mntcnt;
 
        uint32_t ntotal;
 
 
        /* Inode meta data */
 
        uint32_t it_size;
 
        uint32_t itotal;
 
        uint32_t ifree;
 
        uint32_t ihead;
 
        uint32_t itail;
 
 
        /* Data blocks' metadata */
 
        uint32_t dz_start;
 
        uint32_t dz_total;
 
        uint32_t dz_free;
 
        uint32_t head_blk;
 
        uint32_t head_idx;
 
        uint32_t tail_blk;
 
        uint32_t tail_idx;
 
        struct HeadCache
        {
            uint32_t idx;
            uint32_t ref[HEAD_CACHE_SIZE];
        } head_cache;
 
        struct TailCache
        {
            uint32_t idx;
            uint32_t ref[TAIL_CACHE_SIZE];
        } tail_cache;
 
    };
 
};
 
#endif /*__SOFS19_SUPERBLOCK__ */