79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
#ifndef BLOCK_H_
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#define BLOCK_H_
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#include "emmafs.h"
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#define BLOCKSIZE 4096
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// NOTE: This is about how many inode get reserved per bit at fs creation. TODO: Come up witha better name.
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#define BITS_PER_INODE 16384
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typedef struct tm tm;
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struct data_block {
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char data[BLOCKSIZE];
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};
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struct indirect_data_block {
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struct data_block* first_data_block;
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struct data_block* second_data_block;
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struct data_block* third_data_block;
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struct data_block* fourth_data_block;
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struct data_block* fifth_data_block;
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struct data_block* sixth_data_block;
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struct data_block* seventh_data_block;
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struct data_block* eighth_data_block;
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struct data_block* nineth_data_block;
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struct data_block* tenth_data_block;
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struct data_block* eleventh_data_block;
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struct data_block* twelveth_data_block;
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};
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struct doubly_indirect_data_block {
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struct data_block* first_indirect_data_block;
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struct data_block* second_indirect_data_block;
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struct data_block* third_indirect_data_block;
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struct data_block* fourth_indirect_data_block;
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struct data_block* fifth_indirect_data_block;
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struct data_block* sixth_indirect_data_block;
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struct data_block* seventh_indirect_data_block;
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struct data_block* eighth_indirect_data_block;
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struct data_block* nineth_indirect_data_block;
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struct data_block* tenth_indirect_data_block;
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struct data_block* eleventh_indirect_data_block;
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struct data_block* twelveth_indirect_data_block;
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};
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struct trebly_indirect_data_block {
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struct data_block* first_doubly_indirect_data_block;
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struct data_block* second_doubly_indirect_data_block;
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struct data_block* third_doubly_indirect_data_block;
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struct data_block* fourth_doubly_indirect_data_block;
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struct data_block* fifth_doubly_indirect_data_block;
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struct data_block* sixth_doubly_indirect_data_block;
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struct data_block* seventh_doubly_indirect_data_block;
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struct data_block* eighth_doubly_indirect_data_block;
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struct data_block* nineth_doubly_indirect_data_block;
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struct data_block* tenth_doubly_indirect_data_block;
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struct data_block* eleventh_doubly_indirect_data_block;
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struct data_block* twelveth_doubly_indirect_data_block;
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};
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struct tm *local_time;
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// Global Variables
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time_t current_time;
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// Provide fs size in bytes
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int find_number_of_inodes(size_t fs_size);
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tm* get_local_time();
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size_t get_file_size(uint16_t block_count);
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// DEPRECATED? Probably unneeded and will soon be removed. This should not be handled on the fs level.
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uint16_t bytes_to_kb(uint32_t bytes);
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uint16_t kb_to_mb(uint16_t kb);
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uint16_t mb_to_gb(uint16_t mb);
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uint16_t gb_to_tb(uint16_t gb);
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uint8_t tb_to_pb(uint16_t tb);
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#endif // BLOCK_H_
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