Can now retrieve filenames from Master Table

Makefile

@@ -11,12 +11,12 @@ CFLAGS = -O0 -g -Wall -D_FILE_OFFSET_BITS=64 -DFUSE_USE_VERSION=25
 LIBS := fuse 
 LIBS := $(addprefix -l,$(LIBS))
 
-all: tfs
+all: lsfs_fuse
 
 %.o: %.c .always_rebuilt
 	$(GCC) $(CFLAGS) -c -o $@ $<
 
-tfs: $(OBJS) .always_rebuilt
+lsfs_fuse: $(OBJS) .always_rebuilt
 	$(GCC) $(OBJS) $(LIBS) $(CFLAGS) -o lsfs_fuse
 
 clean:

lsfs_disk_controller.h

@@ -11,7 +11,7 @@
 #include <unistd.h>
 
 typedef struct struct_partition_control partition_control;
-typedef struct struct_global_tag global_tag;
+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;
@@ -19,23 +19,22 @@ typedef struct tag_record tag_record;
 
 typedef uint64_t lsfs_sector_offset;
 typedef lsfs_sector_offset lsfs_file_id;
-typedef lsfs_sector_offset lsfs_tag_id;
 
 //typedef uint64_t sector_index;
 static FILE* disk;
-static partition_control p_control; // used for debugging
+static partition_control p_control;
 
 int create_file_system();
-lsfs_sector_offset 
lsfs_disk_create_tag(char* tag_name, bool is_filename);
-lsfs_sector_offset lsfs_disk_create_file(char* filename, lsfs_tag_id* tags, void* file_data);
-int 
lsfs_disk_untag_file(lsfs_tag_id tag_id, lsfs_file_id file_id);
-int 
lsfs_disk_tag_file(lsfs_tag_id tag_id, lsfs_file_id file_id);
-int 
lsfs_disk_delete_tag(lsfs_tag_id tag_id);
+//lsfs_sector_offset lsfs_disk_create_tag(char* tag_name, bool is_filename);
+lsfs_sector_offset lsfs_disk_create_file(char* filename, lsfs_file_id* tags, void* file_data);
+//int lsfs_disk_untag_file(lsfs_file_id file_id, lsfs_file_id file_id);
+//int lsfs_disk_tag_file(lsfs_file_id file_id, lsfs_file_id file_id);
+//int lsfs_disk_delete_tag(lsfs_file_id file_id);
 int lsfs_disk_delete_file(lsfs_file_id file_id);
 int get_free_sectors(int num_sectors_needed, lsfs_sector_offset* output_array);
 int lsfs_disk_read_data_from_file(lsfs_file_id file_id, int buffer_size, void* buffer_for_data);
 int lsfs_disk_write_data_to_file(lsfs_file_id file_id, int data_length, char *data);
-int 
lsfs_disk_rename_tag(lsfs_file_id file_id, char* new_tagname);
+//int lsfs_disk_rename_tag(lsfs_file_id file_id, char* new_filename);
 int lsfs_disk_rename_file(lsfs_file_id file_id, const char* new_filename);
 int lsfs_disk_load_disk();
 int write_data_to_disk(lsfs_sector_offset at_sector, void* data_to_write);
@@ -43,21 +42,21 @@ int read_data_from_disk(lsfs_sector_offset index, void* data_buffer);
 int write_data_to_disk_off(lsfs_sector_offset index, void* data_to_write, int offset);
 
 
-#define SECTOR_SIZE 4096
-#define DEFAULT_FILE_SIZE 1 // This is in sectors
-#define DEFAULT_MASTER_TAG_TABLE_SIZE 3855 // correspond to 1 MiB in sectors 3855 * 57825
+#define SECTOR_SIZE 512
+#define DEFAULT_FILE_SIZE 4 // This is in sectors
+#define DEFAULT_MASTER_TABLE_SIZE 64 
 #define DEFAULT_TAG_TABLE_SIZE 64 // correspond to 262144 bytes in sectors - 16384 files pr. default. (minus one, the last is a pointer to a table more )
 #define MAX_MASTER_TAGS 57825
 #define MAX_TAGS_IN_TAG_TABLE 16384
 #define MAX_TAGS_FOR_A_FILE 32 
+#define NUM_DATA_POINTERS 28 
 
-#define MAX_NUM_ONE_LEVEL_DATA 256 // First Mib of a 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. 
+//#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;
-    global_tag*      master_table;
+    table_entry*     master_table;
 } __attribute__((packed)) partition_control;
 
 typedef struct File_System_Control_Information {
@@ -71,24 +70,22 @@ typedef struct File_System_Control_Information {
     uint64_t    master_tag_records[16];
 } __attribute__((packed)) FSCI;
 
-typedef struct struct_global_tag {
-    /*  SizeOf this = 
-     *  tagname
-     *  address
-     *  control_bits
-     */
-    char            tagname[256]; 
-    lsfs_tag_id     tag_table_index;
+typedef struct struct_table_entry {
+    char            filename[256]; 
+    lsfs_file_id    tag_table_index;
+    uint64_t        file_size;
+    mif*            ext_file_data;         
     struct {
         uint64_t is_filename : 1;    
     } control_bits;
-} __attribute__((packed)) global_tag; 
+    lsfs_sector_offset data_pointer[NUM_DATA_POINTERS]
+} __attribute__((packed)) table_entry; 
 
 
 typedef struct meta_information_format {
     char            filename[246]; // remeber that the 246 bytes has to be a /0 terminator.. 
     uint32_t        owner_id;
-    lsfs_tag_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*/ 
@@ -100,7 +97,7 @@ typedef struct meta_information_format {
      *  94 next pointers is a pointer 
      *  94 next pointers to pointers to data
      */
-    lsfs_sector_offset   one_level_pointer_data[MAX_NUM_ONE_LEVEL_DATA];
+    lsfs_sector_offset   one_level_pointer_data[NUM_DATA_POINTERS];
     lsfs_sector_offset   two_level_pointer_data[94];
     lsfs_sector_offset   three_level_pointer_data[94]; 
 
@@ -122,7 +119,7 @@ int lsfs_disk_read_data_from_file(lsfs_file_id file_id, int buffer_size, void* b
     mif* mif_record = calloc(1, SECTOR_SIZE);
     read_data_from_disk(file_id, mif_record);
     int return_val = 0;
-    for (int i = 0; i < MAX_NUM_ONE_LEVEL_DATA; ++i) {
+    for (int i = 0; i < NUM_DATA_POINTERS; ++i) {
         if(mif_record->one_level_pointer_data[i] == 0) {
             break;
         }
@@ -167,7 +164,7 @@ int lsfs_disk_write_data_to_file(lsfs_file_id file_id, int data_length, char *da
     }
 
     for (;;) {
-        assert(current_sector <= MAX_NUM_ONE_LEVEL_DATA);
+        assert(current_sector <= NUM_DATA_POINTERS);
         write_data_to_disk(mif_record.one_level_pointer_data[current_sector++], tmp_buffer);
         if (data_length <= 0) break;
 
@@ -203,12 +200,12 @@ time_t lsfs_disk_truncate_file(lsfs_file_id file_id) {
     return result;
 }
 
-int lsfs_disk_rename_tag(lsfs_tag_id tag_id, char* new_tagname) {
+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.mtt_tags[i].tag_table_index == tag_id) {
-            memset(p_control.mtt_tags[i].tagname, 0, sizeof(p_control.mtt_tags[i].tagname));
-            sprintf(p_control.mtt_tags[i].tagname, "%s", new_tagname);  
+        if(p_control.master_table[i].tag_table_index == 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);  
             break;
         }
     }
@@ -216,7 +213,7 @@ int lsfs_disk_rename_tag(lsfs_tag_id tag_id, char* new_tagname) {
 
     // Save the changes to disk
     fseek ( disk , (p_control.fsci->master_tag_records[0] * SECTOR_SIZE) , SEEK_SET ); 
-    fwrite(p_control.mtt_tags, 1, sizeof(global_tag) * DEFAULT_MASTER_TAG_TABLE_SIZE, disk);
+    fwrite(p_control.master_table, 1, sizeof(table_entry) * DEFAULT_MASTER_TABLE_SIZE, disk);
     return 1;
 }
 
@@ -247,7 +244,7 @@ int lsfs_disk_delete_file(lsfs_file_id file_id) {
         if(mif_record->tags[i] == 0) {
             break;
         }
-        lsfs_disk_untag_file(mif_record->tags[i], file_id);        
+        //lsfs_disk_untag_file(mif_record->tags[i], file_id);        
     }    
     // TODO Delete/free all data sectors. 
     // Delete/free the mif record sector.  
@@ -256,16 +253,16 @@ int lsfs_disk_delete_file(lsfs_file_id file_id) {
     return 1;
 }
 
-int lsfs_disk_delete_tag(lsfs_tag_id tag_id) {
+/*int lsfs_disk_delete_tag(lsfs_file_id file_id) {
     tag_record* tag_table = calloc(64, SECTOR_SIZE);
-    read_data_from_disk(tag_id, tag_table);
+    read_data_from_disk(file_id, tag_table);
 
     for (int i = 0; i < MAX_TAGS_IN_TAG_TABLE; ++i)
     {
         if(tag_table[i].mif_record == 0) {
             break;
         }
-        lsfs_disk_untag_file(tag_id, tag_table[i].mif_record);
+        lsfs_disk_untag_file(file_id, tag_table[i].mif_record);
     }
 
 
@@ -273,14 +270,14 @@ int lsfs_disk_delete_tag(lsfs_tag_id tag_id) {
 
     for (int i = 0; i < MAX_MASTER_TAGS; ++i)
     {
-        if(p_control.mtt_tags[i].tag_table_index == tag_id) {
-            p_control.mtt_tags[i] = p_control.mtt_tags[i+1];
+        if(p_control.master_table[i].tag_table_index == file_id) {
+            p_control.master_table[i] = p_control.master_table[i+1];
             truncate_table = 1;
-            printf("Tag deleted from master table - TagID: %lu\n", tag_id);
+            printf("Tag deleted from master table - TagID: %lu\n", file_id);
         }
         else if (truncate_table) {
-            p_control.mtt_tags[i] = p_control.mtt_tags[i+1];
-            if (p_control.mtt_tags[i+1].tag_table_index == 0) {
+            p_control.master_table[i] = p_control.master_table[i+1];
+            if (p_control.master_table[i+1].tag_table_index == 0) {
                 break;
             }
         }
@@ -289,19 +286,19 @@ int lsfs_disk_delete_tag(lsfs_tag_id tag_id) {
 
     // Save the changes to disk
     fseek ( disk , (p_control.fsci->master_tag_records[0] * SECTOR_SIZE) , SEEK_SET ); 
-    fwrite(p_control.mtt_tags, 1, sizeof(global_tag) * DEFAULT_MASTER_TAG_TABLE_SIZE, disk);
+    fwrite(p_control.master_table, 1, sizeof(table_entry) * DEFAULT_MASTER_TABLE_SIZE, disk);
     free(tag_table); 
     return 1;
-}
+}*/
 
-int lsfs_disk_tag_file(lsfs_tag_id tag_id, lsfs_file_id file_id) {
+/*int lsfs_disk_tag_file(lsfs_file_id file_id, lsfs_file_id file_id) {
     mif* mif_record = calloc(1, SECTOR_SIZE);
     read_data_from_disk(file_id, mif_record);
 
     for (int i = 0; i < MAX_TAGS_FOR_A_FILE; ++i)
     {
         if(mif_record->tags[i] == 0) {
-            mif_record->tags[i] = tag_id;
+            mif_record->tags[i] = file_id;
             break;
         }
     }
@@ -309,7 +306,7 @@ int lsfs_disk_tag_file(lsfs_tag_id tag_id, lsfs_file_id file_id) {
     free(mif_record); 
 
     tag_record* tag_table = calloc(64, SECTOR_SIZE);
-    read_data_from_disk(tag_id, tag_table);
+    read_data_from_disk(file_id, tag_table);
 
     for (int i = 0; i < MAX_TAGS_IN_TAG_TABLE; ++i)
     {
@@ -319,22 +316,23 @@ int lsfs_disk_tag_file(lsfs_tag_id tag_id, lsfs_file_id file_id) {
             break;
         }
     }
-    write_data_to_disk(tag_id, tag_table);
+    write_data_to_disk(file_id, tag_table);
     free(tag_table); 
     return 1;
 }
+*/
 
-int lsfs_disk_untag_file(lsfs_tag_id tag_id, lsfs_file_id file_id) {
+/*int lsfs_disk_untag_file(lsfs_file_id file_id, lsfs_file_id file_id) {
     mif* mif_record = calloc(1, SECTOR_SIZE);
     read_data_from_disk(file_id, mif_record);
     int truncate_table = 0;
 
     for (int i = 0; i < MAX_TAGS_FOR_A_FILE; ++i)
     {
-        if(mif_record->tags[i] == tag_id) {
+        if(mif_record->tags[i] == file_id) {
             mif_record->tags[i] = mif_record->tags[i+1];
             truncate_table = 1;
-            printf("file untagged - TagID: %lu - FileID: %lu \n", tag_id, file_id);
+            printf("file untagged - TagID: %lu - FileID: %lu \n", file_id, file_id);
         }
         else if (truncate_table) {
             mif_record->tags[i] = mif_record->tags[i+1];
@@ -354,7 +352,7 @@ int lsfs_disk_untag_file(lsfs_tag_id tag_id, lsfs_file_id file_id) {
     free(mif_record); 
 
     tag_record* tag_table = calloc(64, SECTOR_SIZE);
-    read_data_from_disk(tag_id, tag_table);
+    read_data_from_disk(file_id, tag_table);
     truncate_table = 0;
 
     for (int i = 0; i < MAX_TAGS_IN_TAG_TABLE; ++i)
@@ -371,30 +369,30 @@ int lsfs_disk_untag_file(lsfs_tag_id tag_id, lsfs_file_id file_id) {
             }
         }
     }
-    write_data_to_disk(tag_id, tag_table);    
+    write_data_to_disk(file_id, tag_table);    
     free(tag_table);
     return 1;
-}
+}*/
 
-lsfs_tag_id lsfs_disk_create_tag(char* tag_name, bool is_filename) {
-    /* Return ID of new tag, oterwise return 0 */
-    lsfs_tag_id* free_sectors;
+/*lsfs_file_id lsfs_disk_create_tag(char* tag_name, bool is_filename) {
+    // Return ID of new tag, oterwise return 0 
+    lsfs_file_id* free_sectors;
     // Returns an array, with the sector numbers that is assignt to you
-    free_sectors = calloc(DEFAULT_TAG_TABLE_SIZE, sizeof(lsfs_tag_id));
+    free_sectors = calloc(DEFAULT_TAG_TABLE_SIZE, sizeof(lsfs_file_id));
     get_free_sectors(DEFAULT_TAG_TABLE_SIZE, free_sectors); // has to be freed 
     
     // Insert tag in the master tag, table an set the pointer to the first of the tag table
     int index_in_mtt = 0; 
-    while(p_control.mtt_tags[index_in_mtt].tag_table_index != 0) {
+    while(p_control.master_table[index_in_mtt].tag_table_index != 0) {
         //TODO also have to count if we enter next data section. 
         index_in_mtt++;
     }
 
 
-    p_control.mtt_tags[index_in_mtt].tag_table_index = free_sectors[0]; 
+    p_control.master_table[index_in_mtt].tag_table_index = free_sectors[0]; 
     printf("%lu\n", free_sectors[0]);
-    sprintf(p_control.mtt_tags[index_in_mtt].tagname, "%s", tag_name);
-    p_control.mtt_tags[index_in_mtt].control_bits.is_filename = is_filename;
+    sprintf(p_control.master_table[index_in_mtt].filename, "%s", tag_name);
+    p_control.master_table[index_in_mtt].control_bits.is_filename = is_filename;
 
     tag_record new_tag[DEFAULT_TAG_TABLE_SIZE];
     memset(new_tag, 0, (DEFAULT_TAG_TABLE_SIZE * sizeof(tag_record)));
@@ -403,7 +401,7 @@ lsfs_tag_id lsfs_disk_create_tag(char* tag_name, bool is_filename) {
     //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 ); 
-    fwrite(p_control.mtt_tags, 1, sizeof(global_tag) * DEFAULT_MASTER_TAG_TABLE_SIZE, disk);
+    fwrite(p_control.master_table, 1, sizeof(table_entry) * DEFAULT_MASTER_TABLE_SIZE, disk);
     
     fseek ( disk , ((*free_sectors) * SECTOR_SIZE) , SEEK_SET ); 
     fwrite(new_tag, 1, DEFAULT_TAG_TABLE_SIZE * sizeof(tag_record), disk);
@@ -413,6 +411,7 @@ lsfs_tag_id lsfs_disk_create_tag(char* tag_name, bool is_filename) {
     free(free_sectors);
     return return_value;
 }
+*/
 
 int get_free_sectors(int num_sectors_needed, lsfs_sector_offset* output_array) {
     /*
@@ -462,10 +461,10 @@ int create_file_system() {
     free(zero_buffer);
     /* MASTER TAG TABLE */
 
-    global_tag mtt_tags[DEFAULT_MASTER_TAG_TABLE_SIZE];
-    memset(mtt_tags, 0, (DEFAULT_MASTER_TAG_TABLE_SIZE * sizeof(global_tag)));
+    table_entry master_table[DEFAULT_MASTER_TABLE_SIZE];
+    memset(master_table, 0, (DEFAULT_MASTER_TABLE_SIZE * sizeof(table_entry)));
 
-    fwrite(&mtt_tags, 1, sizeof(mtt_tags), disk);
+    fwrite(&master_table, 1, sizeof(master_table), disk);
     zero_buffer = calloc(1, 16);
     fwrite(zero_buffer, 1, 16, disk);
     free(zero_buffer);
@@ -475,22 +474,22 @@ int create_file_system() {
 int lsfs_disk_load_disk() {
     
     // First we find the Mater Table.     
-    fseek ( disk , 1 * SECTOR_SIZE, SEEK_SET );
-    fread(p_control.mtt_tags, 1, sizeof(global_tag) * DEFAULT_MASTER_TAG_TABLE_SIZE , disk);
+    fseek ( disk , 24 * SECTOR_SIZE, SEEK_SET );
+    fread(p_control.master_table, 1, sizeof(table_entry) * DEFAULT_MASTER_TABLE_SIZE , disk);
 
     // Now we can finde the FSCI data
-    fseek ( disk , 0, SEEK_SET );
-    fread(p_control.fsci, 1, sizeof(FSCI), disk);
+    //fseek ( disk , 0, SEEK_SET );
+    //fread(p_control.fsci, 1, sizeof(FSCI), disk);
 
     return 1;
 }
 
 
-lsfs_tag_id lsfs_disk_create_file(char* filename, lsfs_tag_id* tags, void* file_data) {
+lsfs_file_id lsfs_disk_create_file(char* filename, lsfs_file_id* tags, void* file_data) {
 
     // create space for mif
     mif new_file_data;
-    lsfs_tag_id return_id;
+    lsfs_file_id return_id;
 
 
     memset(new_file_data.filename, 0, sizeof(new_file_data.filename));   
@@ -499,11 +498,11 @@ lsfs_tag_id lsfs_disk_create_file(char* filename, lsfs_tag_id* tags, void* file_
     printf("%s\n", new_file_data.filename);
     new_file_data.owner_id = getuid();
     
-    lsfs_tag_id* index_to_mif_data;
-    index_to_mif_data = calloc(1, sizeof(lsfs_tag_id));
+    lsfs_file_id* index_to_mif_data;
+    index_to_mif_data = calloc(1, sizeof(lsfs_file_id));
     get_free_sectors(1, index_to_mif_data); // has to be freed 
 
-    memset(new_file_data.tags, 0, (32 * sizeof(lsfs_tag_id)));
+    memset(new_file_data.tags, 0, (32 * sizeof(lsfs_file_id)));
     
     new_file_data.file_size = 0;
 
@@ -532,7 +531,7 @@ lsfs_tag_id lsfs_disk_create_file(char* filename, lsfs_tag_id* tags, void* file_
     if (tags != NULL) {
         while(tags[i] != 0) {
             printf("A tag is found \n");
-            lsfs_disk_tag_file(tags[i], index_to_mif_data[0]);
+            //lsfs_disk_tag_file(tags[i], index_to_mif_data[0]);
             new_file_data.tags[i] = tags[i];
             i++;
         }        

lsfs_fuse.c

@@ -187,6 +187,10 @@ int lsfs_readdir( const char *path, void *buf, fuse_fill_dir_t filler, off_t off
     filler(buf, ".", NULL, 0);
     filler(buf, "..", NULL, 0);
     filler(buf, "hello", NULL, 0);
+    filler(buf, p_control.master_table[0].filename, NULL, 0);
+    filler(buf, p_control.master_table[1].filename, NULL, 0);
+    filler(buf, p_control.master_table[2].filename, NULL, 0);
+
 
     return 0;
 }
@@ -292,10 +296,10 @@ end:
 
 int main( int argc, char *argv[] ) {
 
-    disk = fopen ( "~/Documents/github/SingOS/bin/SingOS.img" , "r+b" );
+    disk = fopen ( "/home/rhodez-x/Documents/github/SingOS/bin/SingOS.img" , "r+b" );
     p_control.fsci = malloc(sizeof(FSCI));
-    p_control.master_table = malloc(sizeof(global_tag) * DEFAULT_MASTER_TAG_TABLE_SIZE);
-    lsfs_disk_load_disk(disk, &p_control);
+    p_control.master_table = malloc(sizeof(table_entry) * DEFAULT_MASTER_TABLE_SIZE);
+    lsfs_disk_load_disk();
     
     //tag_record *tag_table = calloc(1, SECTOR_SIZE);
     //mif* mif_data = calloc(1, SECTOR_SIZE);