static int nilfs_direct_prepare_delete(struct nilfs_direct *direct, union nilfs_bmap_ptr_req *req, __u64 key, struct nilfs_bmap_stats *stats) { int ret; req->bpr_ptr = nilfs_direct_get_ptr(direct, key); ret = nilfs_bmap_prepare_end_ptr(&direct->d_bmap, req); if (!ret) stats->bs_nblocks = 1; return ret; }
static int nilfs_direct_delete(struct nilfs_bmap *bmap, __u64 key) { union nilfs_bmap_ptr_req req; struct inode *dat; int ret; if (key > NILFS_DIRECT_KEY_MAX || nilfs_direct_get_ptr(bmap, key) == NILFS_BMAP_INVALID_PTR) return -ENOENT; dat = NILFS_BMAP_USE_VBN(bmap) ? nilfs_bmap_get_dat(bmap) : NULL; req.bpr_ptr = nilfs_direct_get_ptr(bmap, key); ret = nilfs_bmap_prepare_end_ptr(bmap, &req, dat); if (!ret) { nilfs_bmap_commit_end_ptr(bmap, &req, dat); nilfs_direct_set_ptr(bmap, key, NILFS_BMAP_INVALID_PTR); nilfs_inode_sub_blocks(bmap->b_inode, 1); } return ret; }