int nilfs_direct_delete_and_convert(struct nilfs_bmap *bmap,
__u64 key, __u64 *keys, __u64 *ptrs, int n)
{
struct nilfs_direct *direct;
__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 */
direct = (struct nilfs_direct *)bmap;
dptrs = nilfs_direct_dptrs(direct);
for (i = 0, j = 0; i < NILFS_DIRECT_NBLOCKS; i++) {
if ((j < n) && (i == keys[j])) {
dptrs[i] = (i != key) ?
nilfs_bmap_ptr_to_dptr(ptrs[j]) :
NILFS_BMAP_INVALID_PTR;
j++;
} else
dptrs[i] = NILFS_BMAP_INVALID_PTR;
}
nilfs_direct_init(bmap);
return 0;
}
static int nilfs_direct_assign_v(struct nilfs_direct *direct,
__u64 key, __u64 ptr,
struct buffer_head **bh,
sector_t blocknr,
union nilfs_binfo *binfo)
{
union nilfs_bmap_ptr_req req;
int ret;
req.bpr_ptr = ptr;
ret = nilfs_bmap_start_v(&direct->d_bmap, &req, blocknr);
if (unlikely(ret < 0))
return ret;
binfo->bi_v.bi_vblocknr = nilfs_bmap_ptr_to_dptr(ptr);
binfo->bi_v.bi_blkoff = nilfs_bmap_key_to_dkey(key);
return 0;
}
static int nilfs_direct_assign_v(struct nilfs_direct *direct,
__u64 key, __u64 ptr,
struct buffer_head **bh,
sector_t blocknr,
union nilfs_binfo *binfo)
{
struct inode *dat = nilfs_bmap_get_dat(&direct->d_bmap);
union nilfs_bmap_ptr_req req;
int ret;
req.bpr_ptr = ptr;
ret = nilfs_dat_prepare_start(dat, &req.bpr_req);
if (!ret) {
nilfs_dat_commit_start(dat, &req.bpr_req, blocknr);
binfo->bi_v.bi_vblocknr = nilfs_bmap_ptr_to_dptr(ptr);
binfo->bi_v.bi_blkoff = nilfs_bmap_key_to_dkey(key);
}
return ret;
}
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);
}
