/* Closes INODE and writes it to disk.
If this was the last reference to INODE, frees its memory.
If INODE was also a removed inode, frees its blocks. */
void
inode_close (struct inode *inode)
{
if(INODE_DEBUG || FILE_DEBUG) printf("INODE: closing inode %u \n", inode->sector);
if(INODE_PRINT) inode_print(inode);
/* Ignore null pointer. */
if (inode == NULL)
return;
/* Release resources if this was the last opener. */
if (--inode->open_cnt == 0)
{
lock_acquire(&inode->lock);
/* Remove from inode list and release lock. */
list_remove (&inode->elem);
/* Deallocate blocks if removed. */
if (inode->removed)
{
if(INODE_DEBUG) printf("INODE: removing inode %u\n", inode->sector);
/* truncate inode to size 0 */
inode_truncate(inode);
/* release inode */
free_map_release (inode->sector, 1);
}
lock_release(&inode->lock);
free (inode);
}
}
void fs_removeAllFiles() {
int i;
int count;
INode* node;
if (FS_DEBUG) {
lightLine();
printf("removeAllFiles()\n");
lightLine();
}
count = iNodes->count;
for (i = 0; i < count; i++) {
node = list_peekFirst(iNodes);
inode_print(node);
fs_removeFile(node->id);
}
}
int main(int argc, char **argv)
{
FILE *fp;
ext2_superblock_t *superblock = (ext2_superblock_t *)malloc(sizeof(ext2_superblock_t));
if(argc != 2){
printf("incorrect arguments!\n");
return -1;
}
if((fp = fopen(argv[1],"rb")) == NULL)
{
printf("file NULL!\n");
return -1;
}
fseek(fp, 1024, SEEK_SET);
fread(superblock, 1024,1, fp);
//if(superblock->s_magic
printf("sizei %x\n",1024 << superblock->s_log_block_size);
uint32_t blockstart;
if(superblock->s_log_block_size == 0)//1KB blocks
{
blockstart = 0x800;
}else{
blockstart = 0x1000;
}
int32_t groups = (1024/sizeof(ext2_group_descriptor_t));//superblock->s_blocks_count/superblock->s_blocks_per_group + 1;
uint32_t total_groups = superblock->s_blocks_count / superblock->s_blocks_per_group;
uint32_t total_inodes = superblock->s_inodes_count / superblock->s_inodes_per_group;
printf("inodes %i groups %i\n",total_inodes,total_groups);
ext2_group_descriptor_t *gd_table = malloc(sizeof(ext2_group_descriptor_t)*groups);
fread(gd_table, 1024,1, fp);
int i;
// for(i = 0; i < groups; i++)
gd_print(gd_table[0]);
fseek(fp, 0, SEEK_SET);
uint32_t fs_size = superblock->s_blocks_count * 1024;
char *fs = malloc(fs_size);
fread(fs, fs_size,1, fp);
int inode_start = BLOCK(gd_table[0].bg_inode_table);
printf("inode_start %x\n",inode_start);
ext2_inode_t *inode_table = (ext2_inode_t *)&fs[inode_start];
// for(i = 0; i < 16; i++)
inode_print(inode_table[21]);
ext2_directory_t *root = open_root(fs, inode_table);
list_files(root, inode_table[1].i_size);
printf("\n\n");
ext2_directory_t *dir = open_dir(fs, inode_table, 12);
list_files(dir, inode_table[11].i_size);
int test = lookup_file(dir, inode_table[11].i_size, "map");
if(test)
printf("awesome\n");
/*
// printf("\nsize %i\n",sizeof(ext2_inode_t));
printf("groups %i\n",groups);
printf("magic %x\n",superblock->s_magic);*/
fclose(fp);
return 0;
}
