Nucleus

/*
 * 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>

static void super_block_new(Object *);
static void super_block_delete(Object *);

/* Super Block object type */
ObjectType superBlockType = {
	.name = "SUPER BLOCK",
	.size = sizeof(SuperBlock),
	.new = super_block_new,
	.delete = super_block_delete,
};

/* Create a new SuperBlock object */
static void
super_block_new(Object *obj)
{
	SuperBlock *sb = (void *) obj;
	sb->inodes = create_list(&inodeType, LIST_NORMAL);
}

/* Destroy SuperBlock object */
static void
super_block_delete(Object *obj)
{
	SuperBlock *sb = (void *) obj;
	destroy_list(sb->inodes);
}

/* Allocate an Inode */
Inode *
super_alloc_inode(SuperBlock *sb)
{
	if (!sb->ops || !sb->ops->alloc_inode)
		return NULL;
	Inode *inode = sb->ops->alloc_inode(sb);
	inode->super = get(sb);
	add(sb->inodes, inode);
	return inode;
}

/* Search for an Inode in a Super Block's Inode list */
Inode *
super_find_inode(SuperBlock *sb, ino_t ino)
{
	Inode *inode;
	foreach (sb->inodes, inode) {
		if (inode->ino == ino)
			break;
	}
	return inode;
}