/*
* Initialize filesystem. Read in file system metadata and initialize
* memory structures. If there are inconsistencies, now would also be
* a good time to deal with that.
*
* HINT: You don't need to deal with the 'conn' parameter AND you may
* just return NULL.
*
*/
static void* vfs_mount(struct fuse_conn_info *conn) {
fprintf(stderr, "vfs_mount called\n");
// Do not touch or move this code; connects the disk
dconnect();
/* 3600: YOU SHOULD ADD CODE HERE TO CHECK THE CONSISTENCY OF YOUR DISK
AND LOAD ANY DATA STRUCTURES INTO MEMORY */
vcb volblock = getvcb();
if(volblock.disk_id != MAGICNUM){
fprintf(stderr, "Invalid disk: Invalid magic number.");
dunconnect();
}
if(volblock.mounted != 0){
fprintf(stderr, "Invalid disk: Disk did not unmount correctly.");
dunconnect();
}
else{
volblock.mounted = 1;
setvcb(volblock);
}
return NULL;
}
void myformat(int size) {
// Do not touch or move this function
dcreate_connect();
// Calculate number of data blocks, FAT entries.
int num_dblocks = get_num_dblocks(size);
// Format volume control block.
vcb volblock = make_volblock(num_dblocks);
char vcbtemp[BLOCKSIZE];
memset(vcbtemp,0,BLOCKSIZE);
memcpy(vcbtemp,&volblock,sizeof(vcb));
dwrite(0,vcbtemp);
// Format directory entries.
dirent dent = make_directent();
char dirtemp[BLOCKSIZE]; //FIXME: Eventually will have to be smaller.
memset(dirtemp,0,BLOCKSIZE);
memcpy(dirtemp,&dent, sizeof(dirent));
for(int i = 1; i < 101; i++){
dwrite(i,dirtemp);
}
/*
dirent dent;
char dirblock[BLOCKSIZE];
memset(dirblock,0,BLOCKSIZE);
memcpy(dirblock,&dirent,sizeof(dirblock));
for(int i = 1; i <= 100; i++){
dwrite(i,dirblock);
} */
/* 3600: FILL IN CODE HERE. YOU SHOULD INITIALIZE ANY ON-DISK
STRUCTURES TO THEIR INITIAL VALUE, AS YOU ARE FORMATTING
A BLANK DISK. YOUR DISK SHOULD BE size BLOCKS IN SIZE. */
/* 3600: AN EXAMPLE OF READING/WRITING TO THE DISK IS BELOW - YOU'LL
WANT TO REPLACE THE CODE BELOW WITH SOMETHING MEANINGFUL. */
/*
// first, create a zero-ed out array of memory
char *tmp = (char *) malloc(BLOCKSIZE);
memset(tmp, 0, BLOCKSIZE);
// now, write that to every block
for (int i=0; i<size; i++)
if (dwrite(i, tmp) < 0)
perror("Error while writing to disk");
*/
// voila! we now have a disk containing all zeros
// Do not touch or move this function
dunconnect();
}
/*
* Called when your file system is unmounted.
*
*/
static void vfs_unmount (void *private_data) {
fprintf(stderr, "vfs_unmount called\n");
/* 3600: YOU SHOULD ADD CODE HERE TO MAKE SURE YOUR ON-DISK STRUCTURES
ARE IN-SYNC BEFORE THE DISK IS UNMOUNTED (ONLY NECESSARY IF YOU
KEEP DATA CACHED THAT'S NOT ON DISK */
// Do not touch or move this code; unconnects the disk
dunconnect();
}
void myformat(int size) {
// Do not touch or move this function
dcreate_connect();
//setting up vcb
vcb myvcb;
initvcb(&myvcb, size);
dirent myde;
initde(&myde);
fatent myfat = { 0, 0, 0 }; //like 20% bruh
char tmp[BLOCKSIZE];
int block = 0; //current block to write to
//write vcb to file
memset(tmp, 0, BLOCKSIZE);
memcpy(tmp, &myvcb, sizeof(vcb));
dwrite(block,tmp);
block++;
//write directory entries to file
for(int i=0; i<25; i++){
memset(tmp, 0, BLOCKSIZE);
memcpy(tmp, &myde, sizeof(dirent));
memcpy(tmp + 128, &myde, sizeof(dirent));
memcpy(tmp + 256, &myde, sizeof(dirent));
memcpy(tmp + 384, &myde, sizeof(dirent));
if(dwrite(block,tmp)< 0)
perror("Error while writing to disk");
block++;
}
//write fatents to file
for (int i=0; i< myvcb.fat_length; i++){
memset(tmp, 0, BLOCKSIZE);
for(int x=0; x<128; x++){
memcpy(tmp + (4 * x), &myfat, sizeof(fatent));
}
if (dwrite(block, tmp) < 0)
perror("Error while writing to disk");
block++;
}
//0 out diskspace where there will be data(not really needed..)
for (int i=0; i<size; i++){
if (dwrite(block, tmp) < 0)
perror("Error while writing to disk");
block++;
}
// Do not touch or move this function
dunconnect();
}
/*
* Called when your file system is unmounted.
*
*/
static void vfs_unmount (void *private_data) {
fprintf(stderr, "vfs_unmount called\n");
vcb volblock = getvcb();
// char temp[BLOCKSIZE];
// memset(temp, 0, BLOCKSIZE);
// dread(0, temp);
// memcpy(&volblock, temp, sizeof(volblock));
volblock.mounted = 0;
setvcb(volblock);
// memcpy(temp, &volblock, sizeof(volblock));
// dwrite(0, temp);
/* 3600: YOU SHOULD ADD CODE HERE TO MAKE SURE YOUR ON-DISK STRUCTURES
ARE IN-SYNC BEFORE THE DISK IS UNMOUNTED (ONLY NECESSARY IF YOU
KEEP DATA CACHED THAT'S NOT ON DISK */
// Do not touch or move this code; unconnects the disk
dunconnect();
}
void myformat(int size) {
// Do not touch or move this function
dcreate_connect();
/* 3600: FILL IN CODE HERE. YOU SHOULD INITIALIZE ANY ON-DISK
STRUCTURES TO THEIR INITIAL VALUE, AS YOU ARE FORMATTING
A BLANK DISK. YOUR DISK SHOULD BE size BLOCKS IN SIZE. */
blocknum *blocks = calloc(size-1, BLOCKSIZE);
for (int i = 1; i < size; i++) {
blocknum b;
b.index = i;
b.valid = 0;
blocks[i] = b;
}
freeb *free_blocks = calloc(size - 3, BLOCKSIZE);
for (int i = 0; i < size - 3; i++) {
freeb f;
blocknum b = blocks[i+4];
if ((i + 4) == size) {
b.valid = 1;
b.index = -1;
} else {
b.valid = 0;
}
f.next = b;
free_blocks[i] = f;
// printf("Free block created with next pointing to %d\n", b.index);
}
blocknum invalid_block;
invalid_block.index = -1;
invalid_block.valid = 0;
vcb myvcb;
myvcb.blocksize = BLOCKSIZE;
myvcb.magic = 17;
myvcb.root = blocks[1];
myvcb.root.valid = 1;
myvcb.free = blocks[3];
strcpy(myvcb.name, "Josh and Mich's excellent file system.");
dnode root;
root.direct[0] = blocks[2];
root.direct[0].valid = 1;
root.size = sizeof(blocknum);
root.user = getuid();
root.group = getgid();
root.mode = 0777;
root.single_indirect = invalid_block;
root.double_indirect = invalid_block;
for (int i = 1; i < 54; i++) {
root.direct[i] = invalid_block;
}
struct timespec current_time;
struct timeval ctval;
if (gettimeofday(&ctval, NULL) != 0) {
printf("Error getting time.\n");
}
current_time.tv_sec = ctval.tv_sec;
current_time.tv_nsec = ctval.tv_usec * 1000;
// if ((clock_gettime(CLOCK_REALTIME, ¤t_time)) != 0) {
// printf("ERROR: Cannot get time. \n");
// }
root.access_time = current_time;
root.modify_time = current_time;
root.create_time = current_time;
direntry dot;
dot.type = 'd';
dot.block = blocks[1];
dot.block.valid = 1;
strncpy(dot.name, ".", 55);
direntry dotdot;
dotdot.type = 'd';
dotdot.block = blocks[1];
dotdot.block.valid = 1;
strncpy(dotdot.name, "..", 55);
dirent root_dir;
root_dir.entries[0] = dot;
root_dir.entries[1] = dotdot;
direntry empty;
empty.type = '\0';
empty.block = blocks[size];
strcpy(empty.name, "");
for (int i = 2; i < 8; i++) {
root_dir.entries[i] = empty;
}
//printf("The size of vcb is: %d\n", (int) sizeof(myvcb));
// Write the vcb to memory at block 0
if (bwrite(0, &myvcb) < 0) {
perror("ERROR: Could not write vcb to disk.\n");
}
// printf("The size of root_dir is %d\n", (int) sizeof(root_dir));
// Write the root dir to memory at block 1
char* root_tmp = malloc(sizeof(root));
memcpy(root_tmp, &root, sizeof(root));
if (dwrite(1, root_tmp) < 0) {
perror("Error writing root dir to disk.");
}
free(root_tmp);
// Write the root dir entries to memory at block 2
char* root_dir_tmp = malloc(sizeof(root_dir));
memcpy(root_dir_tmp, &root_dir, sizeof(root_dir));
if (dwrite(2, root_dir_tmp) < 0) {
perror("Error writing root dir entries to disk.");
}
free(root_dir_tmp);
// Write the rest of the disk as free blocks
for (int i = 3; i < size; i++) {
freeb f = free_blocks[i-3];
char* free_tmp = malloc(sizeof(f));
memcpy(free_tmp, &f, sizeof(f));
// printf("Writing free block %d to disk at block %d.\n", f.next.index, i);
if (dwrite(i, free_tmp) < 0) {
perror("Error writing free blocks to disk.");
}
free(free_tmp);
}
/* 3600: AN EXAMPLE OF READING/WRITING TO THE DISK IS BELOW - YOU'LL
WANT TO REPLACE THE CODE BELOW WITH SOMETHING MEANINGFUL. */
/*
// first, create a zero-ed out array of memory
char *tmp = (char *) malloc(BLOCKSIZE);
memset(tmp, 0, BLOCKSIZE);
// now, write that to every block
for (int i=0; i<size; i++)
if (dwrite(i, tmp) < 0)
perror("Error while writing to disk");
// voila! we now have a disk containing all zeros
*/
// Do not touch or move this function
dunconnect();
}
void myformat(int size) {
// Do not touch or move this function
dcreate_connect();
/* 3600: FILL IN CODE HERE. YOU SHOULD INITIALIZE ANY ON-DISK
STRUCTURES TO THEIR INITIAL VALUE, AS YOU ARE FORMATTING
A BLANK DISK. YOUR DISK SHOULD BE size BLOCKS IN SIZE. */
vcb *vol_ctrl_blk = (vcb *) calloc(1, sizeof(vcb));
if (vol_ctrl_blk == NULL) {
printf("Error: Failed to allocate the volume control block.\n");
}
vol_ctrl_blk->magic_num = MAGIC_NUM;
vol_ctrl_blk->blocksize = BLOCKSIZE;
vol_ctrl_blk->de_start = 1; // next block
vol_ctrl_blk->de_length = NUM_DIRENTS; // allocate 100 files at start
vol_ctrl_blk->fat_start = vol_ctrl_blk->de_start + vol_ctrl_blk->de_length; // next available block
vol_ctrl_blk->fat_length = floor((size - (vol_ctrl_blk->de_length+1))/(NUM_FATENTS_PER_BLOCK + 1));
vol_ctrl_blk->db_start = 1 + vol_ctrl_blk->de_length + vol_ctrl_blk->fat_length;
vol_ctrl_blk->volume_size = size;
vol_ctrl_blk->user = getuid();
vol_ctrl_blk->group = getgid();
vol_ctrl_blk->mode = 0777;
struct timespec time;
clock_gettime(CLOCK_REALTIME, &time);
vol_ctrl_blk->access_time = vol_ctrl_blk->modify_time = vol_ctrl_blk->create_time = time;
// Initialize our disk cache to store all disk changes before flushing all at end.
init_cache(vol_ctrl_blk);
write_data(0, vol_ctrl_blk);
// write empty_dirent to dirent blocks
dirent empty_dirent;
empty_dirent.valid = 0;
write_region_data(vol_ctrl_blk->de_start, vol_ctrl_blk->de_start + vol_ctrl_blk->de_length, &empty_dirent);
// Create empty fatent
fatent empty_fatent;
empty_fatent.used = 0;
empty_fatent.eof = 0;
empty_fatent.next = 0;
fatent empty_fatents[NUM_FATENTS_PER_BLOCK];
for (unsigned int i=0; i < NUM_FATENTS_PER_BLOCK; i++) { // initialize the array to have NUM_FATENTS_PER_BLOCK in each block
empty_fatents[i] = empty_fatent; // all empty
}
// write empty fatents to fatent blocks
write_region_data(vol_ctrl_blk->fat_start, vol_ctrl_blk->fat_start + vol_ctrl_blk->fat_length, empty_fatents);
// create a zero-ed out array of memory
char *tmp = (char *) malloc(BLOCKSIZE);
memset(tmp, 0, BLOCKSIZE);
// write 0's to data blocks
write_region_data(vol_ctrl_blk->db_start, size, tmp);
free(tmp);
// Flush our changes from the cache to disk
flush_cache(vol_ctrl_blk);
free(vol_ctrl_blk);
// Do not touch or move this function
dunconnect();
}
void myformat(int size) {
// Do not touch or move this function
dcreate_connect();
int num_dblocks = get_num_dblocks(size);
// Format vcb
vcb volblock = make_volblock(num_dblocks);
// Do we need to malloc space(BLOCKSIZE) for vcbtemp?
char vcbtemp[BLOCKSIZE];
memset(vcbtemp, 0, BLOCKSIZE);
memcpy(vcbtemp, &volblock, BLOCKSIZE);
dwrite(0, vcbtemp);
// Format dirents
dirent dent = make_dirent();
// Do we need to malloc space(BLOCKSIZE) for dirtemp?
char dirtemp[BLOCKSIZE];
memset(dirtemp, 0, BLOCKSIZE);
memcpy(dirtemp, &dent, BLOCKSIZE);
for(int i = volblock.de_start; i < volblock.de_start+volblock.de_length; i++){
dwrite(i, dirtemp);
}
// char fat_block_temp[BLOCKSIZE];
// memset(fat_block_temp,0,BLOCKSIZE);
fatent fe = make_fatent();
fatent fat_block[128];
int remaining = volblock.fat_length;
int block = volblock.fat_start;
while(remaining > 0){
for(int i = 0; i<128; i++){
fat_block[i] = fe;
remaining--;
}
char fat_block_temp[BLOCKSIZE];
memset(fat_block_temp,0,BLOCKSIZE);
memcpy(fat_block_temp,&fat_block,sizeof(fat_block));
dwrite(block,fat_block_temp);
block++;
}
char empty_block[BLOCKSIZE];
memset(empty_block,0,BLOCKSIZE);
for(int i = 0; i < num_dblocks; i++){
dwrite((volblock.db_start + i), empty_block);
}
/*
char fat_entry_temp[4];
// memset(fat_entry_temp,0,4);
// memcpy(fat_entry_temp,&fe,4);
for(int i = volblock.fat_start; i<volblock.fat_start+volblock.fat_length;i++){
fprintf(stderr,"writing fat shit");
for(int j = 0; j < 128; j++){
// Set FAT defaults
// Format single FAT block with 128 default FAT entries
memcpy(&fat_block_temp[4*j],fat_entry_temp,4);
fprintf(stderr,"memcpy(&fat_block_temp...");
}
dwrite(i, fat_block_temp);
}*/
/* 3600: FILL IN CODE HERE. YOU SHOULD INITIALIZE ANY ON-DISK
STRUCTURES TO THEIR INITIAL VALUE, AS YOU ARE FORMATTING
A BLANK DISK. YOUR DISK SHOULD BE size BLOCKS IN SIZE. */
/* 3600: AN EXAMPLE OF READING/WRITING TO THE DISK IS BELOW - YOU'LL
WANT TO REPLACE THE CODE BELOW WITH SOMETHING MEANINGFUL. */
/*
// first, create a zero-ed out array of memory
char *tmp = (char *) malloc(BLOCKSIZE);
memset(tmp, 0, BLOCKSIZE);
// now, write that to every block
for (int i=0; i<size; i++)
if (dwrite(i, tmp) < 0)
perror("Error while writing to disk");
// voila! we now have a disk containing all zeros
*/
// Do not touch or move this function
dunconnect();
}