/*
 * This file implements the Super Block object and associated functions.  Most
 * of the functions here are just wrappers for the Super Block Operations that
 * get specified by the individual file systems, since most of them need to know
 * driver-specific values.  There usually isn't a generic way to handle these
 * operations.
 */

#include <sys/types.h>
#include <nucleus/vfs.h>

/* Data for find callback */
struct FindData {
	ino_t ino;
	Inode *result;
};

/* Super Block object type */
ObjectType superBlockType = {
	.size = sizeof(SuperBlock),
};

/* Find an Inode by ino value */
int
compare_inode_ino(void *addr, void *data)
{
	Inode *inode = addr;
	struct FindData *find = data;
	if (find->ino == inode->ino){
		find->result = get(inode);
		return 1;
	}
	return 0;
}

/* Allocate an Inode */
Inode *
super_alloc_inode(SuperBlock *sb)
{
	if (!sb->ops || !sb->ops->alloc_inode)
		return NULL;
	return sb->ops->alloc_inode(sb);
}

/* Search for an Inode in a Super Block's Inode list */
Inode *
super_find_inode(SuperBlock *sb, ino_t ino)
{
	Inode *inode;
	struct FindData find = {
		.ino = ino,
		.result = NULL,
	};
	iterate(sb->inodes, compare_inode_ino, &find);
	return find.result;
}