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/*
* Copyright (C) 2019 Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com>
*/
#include <stdlib.h>
#include <sys/mman.h>
#include <apfs/checksum.h>
#include <apfs/raw.h>
#include "mkapfs.h"
#include "object.h"
/**
* set_object_header - Set the header for a filesystem object
* @obj: pointer to the on-disk object header
* @size: size of the object (in bytes)
* @oid: object id
* @type: object type
* @subtype: object subtype
*
* All other fields of the object headed by @obj must be set in advance by
* the caller, otherwise the checksum won't be correct.
*/
void set_object_header(struct apfs_obj_phys *obj, u32 size, u64 oid, u32 type, u32 subtype)
{
char *after_cksum = (char *)obj + APFS_MAX_CKSUM_SIZE;
int after_cksum_len = size - APFS_MAX_CKSUM_SIZE;
obj->o_oid = cpu_to_le64(oid);
obj->o_xid = cpu_to_le64(MKFS_XID);
obj->o_type = cpu_to_le32(type);
obj->o_subtype = cpu_to_le32(subtype);
obj->o_cksum = cpu_to_le64(fletcher64(after_cksum, after_cksum_len));
}
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