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Changes to LSFS it self

master
Jørn Guldberg 6 years ago
parent
91d1e1d0f2
commit
ea6451e625
4 changed files with 64 additions and 52 deletions
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  1. 110
      lsfs_disk_controller.h
  2. BIN
      lsfs_fuse
  3. 6
      lsfs_fuse.c
  4. BIN
      lsfs_fuse.o

110
lsfs_disk_controller.h
View File

@ -10,8 +10,9 @@
#include <time.h>
#include <unistd.h>
typedef struct Directory_Table Directory_Table;
typedef struct struct_table_entry struct_table_entry;
typedef struct struct_partition_control partition_control;
typedef struct struct_table_entry table_entry;
typedef struct struct_partition_control partition_control;
typedef struct File_System_Control_Information FSCI;
typedef struct meta_information_format mif;
@ -58,10 +59,6 @@ int save_modified_file_information(lsfs_file* file);
//#define MAX_NUM_TWO_LEVEL_DATA 94 // First Mib of a file.
//#define MAX_NUM_THREE_LEVEL_DATA 94 // First Mib of a file.
typedef struct struct_partition_control{
FSCI* fsci;
table_entry* master_table;
} __attribute__((packed)) partition_control;
typedef struct Partition_Entry
{
@ -74,13 +71,35 @@ typedef struct Partition_Entry
} __attribute__((packed)) Partition_Entry;
typedef struct Master_Boot_record {
typedef struct Master_Boot_record
{
uint8_t offset_on_disk[446]; // The code for the bootloader
Partition_Entry partitions[4];
uint8_t master_tag_records[2]; // Signature
} __attribute__((packed)) Master_Boot_record;
typedef struct File_System_Control_Information {
typedef struct struct_table_entry
{
char filename[256];
lsfs_file_id file_id;
uint64_t file_size;
mif* ext_file_data;
uint32_t file_block_size; // This tells how many block there are allocated for the specific file. eg. we read this amount of bloks for the file.
uint8_t entry_kind;
uint8_t extra_control_bits1;
uint8_t extra_control_bits2;
uint8_t extra_control_bits3;
lsfs_sector_offset data_pointer[NUM_DATA_POINTERS]; // if it is a directory, the first pointer will be to the next table.
} __attribute__((packed)) table_entry;
typedef struct Directory_Table
{
struct_table_entry entries[10];
} __attribute__((packed)) Directory_Table;
typedef struct File_System_Control_Information
{
uint64_t offset_on_disk;
uint64_t next_partition;
uint64_t maximum_sectors_on_partition;
@ -91,23 +110,18 @@ typedef struct File_System_Control_Information {
uint64_t master_tag_records[16];
} __attribute__((packed)) FSCI;
typedef struct struct_table_entry {
char filename[256];
lsfs_file_id file_id;
uint64_t file_size;
mif* ext_file_data;
uint32_t file_block_size; // This tells how many block there are allocated for the specific file. eg. we read this amount of bloks for the file.
struct {
uint32_t is_filename : 1;
} control_bits;
lsfs_sector_offset data_pointer[NUM_DATA_POINTERS];
} __attribute__((packed)) table_entry;
typedef struct struct_partition_control
{
FSCI fsci;
Directory_Table master_table;
} __attribute__((packed)) partition_control;
typedef struct meta_information_format {
char filename[246]; // remeber that the 246 bytes has to be a /0 terminator..
uint32_t owner_id;
lsfs_file_id tags[32];
lsfs_file_id tags[32];
uint64_t file_size;
uint32_t control_bits;
/* not pressent - Permission key table 64 bytes sha-265 pr. key*/
@ -152,20 +166,20 @@ typedef struct lsfs_file {
int lsfs_disk_getattr(lsfs_file* find_file, const char* path) {
int i = 0;
int found = 0;
while((p_control.master_table[i].filename[0]) != 0 && !found) {
if(strcmp( (path + 1 ), p_control.master_table[i].filename ) == 0) {
while((p_control.master_table.entries[i].filename[0]) != 0 && !found) {
if(strcmp( (path + 1 ), p_control.master_table.entries[i].filename ) == 0) {
time_t current_time;
time ( &current_time );
find_file->file_id = p_control.master_table[i].file_id;
find_file->file_id = p_control.master_table.entries[i].file_id;
find_file->table_entry_pointer = i;
find_file->filename = p_control.master_table[i].filename;
find_file->filename = p_control.master_table.entries[i].filename;
find_file->owner_id = getuid();
find_file->size = p_control.master_table[i].file_size; // p_control.master_table[i].data_pointer[0]; //;
find_file->size = p_control.master_table.entries[i].file_size; // p_control.master_table.entries[i].data_pointer[0]; //;
find_file->creation_date = (uint64_t) current_time;
find_file->access_time = (uint64_t) current_time;
find_file->modification_time = (uint64_t) current_time;
find_file->data = p_control.master_table[i].data_pointer;
find_file->data = p_control.master_table.entries[i].data_pointer;
find_file->file_block_size = 1; // TODO: should be loaded from disk.
found = 1;
}
@ -224,7 +238,7 @@ int lsfs_disk_write_data_to_file(lsfs_file *file, int data_length, char *data) {
for (;;) {
assert(current_sector <= NUM_DATA_POINTERS);
written = written + write_data_to_disk(p_control.master_table[file->file_id].data_pointer[current_sector], 4, tmp_buffer);
written = written + write_data_to_disk(p_control.master_table.entries[file->file_id].data_pointer[current_sector], 4, tmp_buffer);
if (data_length <= 0) break;
data += SECTOR_SIZE;
@ -255,7 +269,7 @@ time_t lsfs_disk_truncate_file(lsfs_file *file, off_t offset) {
//read_data_from_disk(file_id, &file_mif);
time_t result = lsfs_disk_update_timestamps(file);
file->size = (int) offset; // p_control.master_table[i].data_pointer[0]; //;
file->size = (int) offset; // p_control.master_table.entries[i].data_pointer[0]; //;
save_modified_file_information(file);
//write_data_to_disk(file->file_id, 4, NULL);
@ -265,16 +279,16 @@ time_t lsfs_disk_truncate_file(lsfs_file *file, off_t offset) {
// int lsfs_disk_rename_tag(lsfs_file_id file_id, char* new_filename) {
// for (int i = 0; i < MAX_MASTER_TAGS; ++i)
// {
// if(p_control.master_table[i].file_id == file_id) {
// memset(p_control.master_table[i].filename, 0, sizeof(p_control.master_table[i].filename));
// sprintf(p_control.master_table[i].filename, "%s", new_filename);
// if(p_control.master_table.entries[i].file_id == file_id) {
// memset(p_control.master_table.entries[i].filename, 0, sizeof(p_control.master_table.entries[i].filename));
// sprintf(p_control.master_table.entries[i].filename, "%s", new_filename);
// break;
// }
// }
// // free the sectors including the tag table
// // Save the changes to disk
// fseek ( disk , (p_control.fsci->master_tag_records[0] * SECTOR_SIZE) , SEEK_SET );
// fseek ( disk , (p_control.fsci.master_tag_records[0] * SECTOR_SIZE) , SEEK_SET );
// fwrite(p_control.master_table, 1, sizeof(table_entry) * DEFAULT_MASTER_TABLE_SIZE, disk);
// return 1;
// }
@ -330,13 +344,13 @@ int lsfs_disk_delete_file(lsfs_file_id file_id) {
for (int i = 0; i < MAX_MASTER_TAGS; ++i)
{
if(p_control.master_table[i].file_id == file_id) {
p_control.master_table[i] = p_control.master_table[i+1];
if(p_control.master_table.entries[i].file_id == file_id) {
p_control.master_table.entries[i] = p_control.master_table[i+1];
truncate_table = 1;
printf("Tag deleted from master table - TagID: %lu\n", file_id);
}
else if (truncate_table) {
p_control.master_table[i] = p_control.master_table[i+1];
p_control.master_table.entries[i] = p_control.master_table[i+1];
if (p_control.master_table[i+1].file_id == 0) {
break;
}
@ -345,7 +359,7 @@ int lsfs_disk_delete_file(lsfs_file_id file_id) {
// free the sectors including the tag table
// Save the changes to disk
fseek ( disk , (p_control.fsci->master_tag_records[0] * SECTOR_SIZE) , SEEK_SET );
fseek ( disk , (p_control.fsci.master_tag_records[0] * SECTOR_SIZE) , SEEK_SET );
fwrite(p_control.master_table, 1, sizeof(table_entry) * DEFAULT_MASTER_TABLE_SIZE, disk);
free(tag_table);
return 1;
@ -460,7 +474,7 @@ int lsfs_disk_delete_file(lsfs_file_id file_id) {
//printf("Sector number: %lu, is assignt to you \n", (*free_sectors));
//char* data = "red_file_1\nred_file_2\n";
//char* sector_to_write = write_mechanism_new_buffer(data);
fseek ( disk , (p_control.fsci->master_tag_records[0] * SECTOR_SIZE) , SEEK_SET );
fseek ( disk , (p_control.fsci.master_tag_records[0] * SECTOR_SIZE) , SEEK_SET );
fwrite(p_control.master_table, 1, sizeof(table_entry) * DEFAULT_MASTER_TABLE_SIZE, disk);
fseek ( disk , ((*free_sectors) * SECTOR_SIZE) , SEEK_SET );
@ -485,17 +499,17 @@ int get_free_sectors(int num_sectors_needed, lsfs_sector_offset* output_array) {
if (num_sectors_needed > 1) {
for (int i = 0; i < num_sectors_needed; ++i)
{
output_array[i] = p_control.fsci->next_free_sector;
p_control.fsci->next_free_sector++;
output_array[i] = p_control.fsci.next_free_sector;
p_control.fsci.next_free_sector++;
}
}
else {
output_array[0] = p_control.fsci->next_free_sector;
p_control.fsci->next_free_sector++;
output_array[0] = p_control.fsci.next_free_sector;
p_control.fsci.next_free_sector++;
}
printf("Sector %lu is assignt\n", output_array[0]);
write_data_to_disk(0, 4, p_control.fsci);
return p_control.fsci->next_free_sector;
write_data_to_disk(0, 4, &p_control.fsci);
return p_control.fsci.next_free_sector;
}
int create_file_system() {
@ -547,7 +561,7 @@ int lsfs_disk_load_disk() {
printf("%d\n", mbr.partitions[i].LBA_abs_first_sector);
// First we find the Mater Table.
fseek ( disk , mbr.partitions[i].LBA_abs_first_sector * SECTOR_SIZE, SEEK_SET );
fread(p_control.master_table, 1, sizeof(table_entry) * DEFAULT_MASTER_TABLE_SIZE , disk);
fread(&p_control.master_table, 1, sizeof(table_entry) * DEFAULT_MASTER_TABLE_SIZE , disk);
return 1;
}
}
@ -616,12 +630,12 @@ lsfs_file_id lsfs_disk_create_file(char* filename, lsfs_file_id* tags, void* fil
int save_modified_file_information(lsfs_file* file) {
// Write the file struct into the table_entry, such that we can save the data correct.
p_control.master_table[file->table_entry_pointer].file_id = file->file_id;
memcpy(p_control.master_table[file->table_entry_pointer].filename, file->filename, 256);
p_control.master_table[file->table_entry_pointer].file_size = file->size; // p_control.master_table[i].data_pointer[0]; //;
//p_control.master_table[i].data_pointer = find_file->data;
p_control.master_table.entries[file->table_entry_pointer].file_id = file->file_id;
memcpy(p_control.master_table.entries[file->table_entry_pointer].filename, file->filename, 256);
p_control.master_table.entries[file->table_entry_pointer].file_size = file->size; // p_control.master_table.entries[i].data_pointer[0]; //;
//p_control.master_table.entries[i].data_pointer = find_file->data;
write_data_to_disk(file->table_entry_pointer, file->file_block_size, &p_control.master_table[file->table_entry_pointer]);
write_data_to_disk(file->table_entry_pointer, file->file_block_size, &p_control.master_table.entries[file->table_entry_pointer]);
return 0;
}

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lsfs_fuse
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6
lsfs_fuse.c
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@ -217,8 +217,8 @@ int lsfs_readdir( const char *path, void *buf, fuse_fill_dir_t filler, off_t off
filler(buf, "..", NULL, 0);
int i = 0;
while(strcmp( "", p_control.master_table[i].filename ) != 0) {
filler(buf, p_control.master_table[i].filename, NULL, 0);
while(strcmp( "", p_control.master_table.entries[i].filename ) != 0) {
filler(buf, p_control.master_table.entries[i].filename, NULL, 0);
i++;
}
@ -311,8 +311,6 @@ end:
int main( int argc, char *argv[] ) {
// "/home/rhodez-x/Documents/github/SingOS/SingOS.img"
disk = fopen ("/home/rhodez-x/Documents/github/SingOS/SingOS.img", "r+b");
p_control.fsci = malloc(sizeof(FSCI));
p_control.master_table = malloc(sizeof(table_entry) * DEFAULT_MASTER_TABLE_SIZE);
if (lsfs_disk_load_disk())
{
return fuse_main( argc, argv, &lsfs_oper );

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