int nilfs_direct_delete_and_convert(struct nilfs_bmap *bmap,
__u64 key, __u64 *keys, __u64 *ptrs, int n)
{
__le64 *dptrs;
int ret, i, j;
/* no need to allocate any resource for conversion */
/* delete */
ret = bmap->b_ops->bop_delete(bmap, key);
if (ret < 0)
return ret;
/* free resources */
if (bmap->b_ops->bop_clear != NULL)
bmap->b_ops->bop_clear(bmap);
/* convert */
dptrs = nilfs_direct_dptrs(bmap);
for (i = 0, j = 0; i < NILFS_DIRECT_NBLOCKS; i++) {
if ((j < n) && (i == keys[j])) {
dptrs[i] = (i != key) ?
cpu_to_le64(ptrs[j]) :
NILFS_BMAP_INVALID_PTR;
j++;
} else
dptrs[i] = NILFS_BMAP_INVALID_PTR;
}
nilfs_direct_init(bmap);
return 0;
}
static inline void nilfs_direct_set_ptr(struct nilfs_bmap *direct,
__u64 key, __u64 ptr)
{
*(nilfs_direct_dptrs(direct) + key) = cpu_to_le64(ptr);
}
static inline __u64
nilfs_direct_get_ptr(const struct nilfs_bmap *direct, __u64 key)
{
return le64_to_cpu(*(nilfs_direct_dptrs(direct) + key));
}
static inline void nilfs_direct_set_ptr(struct nilfs_direct *direct,
__u64 key, __u64 ptr)
{
*(nilfs_direct_dptrs(direct) + key) = nilfs_bmap_ptr_to_dptr(ptr);
}
static inline __u64
nilfs_direct_get_ptr(const struct nilfs_direct *direct, __u64 key)
{
return nilfs_bmap_dptr_to_ptr(*(nilfs_direct_dptrs(direct) + key));
}
