71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
#ifndef INODE_H_
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#define INODE_H_
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#include "emmafs.h"
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#include "util.h"
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typedef struct Inode Inode;
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enum permissions {
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R = 1,
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W = 2,
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X = 4
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};
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// NOTE: Add handling for the block bitmap for when a file is deleted and created. That's how you solve the issue of when a block is usable.
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struct inode_table {
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// the following keyword spam purely exist so I definitely see it with highlighting.
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// NOTE, TODO, FIXME, DEPRECATED, HACK, IMPORTANT: always initialize all values to be null when the inode table is created!!!!
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// TODO: Change currently hardcoded value to actually accurately describe the size of the filesystem, only for temporary purposes.
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Inode* inodes[640000];
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uint32_t size;
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uint32_t used_inodes;
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uint32_t free_inodes;
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};
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struct Inode {
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// file information
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char name[64];
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uint32_t filesize;
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// ownership and permissions
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uint8_t user_permissions;
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uint8_t group_permissions;
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// UID
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uint16_t owner;
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// GID
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uint16_t group;
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// timestamps
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tm created;
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tm last_modified;
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// needed to determine file size
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uint16_t block_count;
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// Data block pointers!!
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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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struct indirect_data_block* file_indirect_data_block;
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struct doubly_indirect_data_block* file_doubly_indirect_data_block;
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struct trebly_indirect_data_block* file_trebly_indirect_data_block;
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};
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Inode* create_empty_inode(char name[64], uint8_t user_permissions, uint8_t group_permissions, uint16_t owner, uint16_t group, struct data_block* data_block);
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Inode* find_inode(char filename[64], struct inode_table* itable);
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bool inode_exists(struct inode_table* itable, char filename[64]);
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void delete_inode(struct inode_table* itable, char filename[64]);
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#endif // INODE_H_
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