static int nilfs_direct_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr) { union nilfs_bmap_ptr_req req; struct inode *dat = NULL; struct buffer_head *bh; int ret; if (key > NILFS_DIRECT_KEY_MAX) return -ENOENT; if (nilfs_direct_get_ptr(bmap, key) != NILFS_BMAP_INVALID_PTR) return -EEXIST; if (NILFS_BMAP_USE_VBN(bmap)) { req.bpr_ptr = nilfs_direct_find_target_v(bmap, key); dat = nilfs_bmap_get_dat(bmap); } ret = nilfs_bmap_prepare_alloc_ptr(bmap, &req, dat); if (!ret) { /* ptr must be a pointer to a buffer head. */ bh = (struct buffer_head *)((unsigned long)ptr); set_buffer_nilfs_volatile(bh); nilfs_bmap_commit_alloc_ptr(bmap, &req, dat); nilfs_direct_set_ptr(bmap, key, req.bpr_ptr); if (!nilfs_bmap_dirty(bmap)) nilfs_bmap_set_dirty(bmap); if (NILFS_BMAP_USE_VBN(bmap)) nilfs_bmap_set_target_v(bmap, key, req.bpr_ptr); nilfs_inode_add_blocks(bmap->b_inode, 1); } return ret; }
static int nilfs_direct_prepare_insert(struct nilfs_direct *direct, __u64 key, union nilfs_bmap_ptr_req *req, struct nilfs_bmap_stats *stats) { int ret; if (NILFS_BMAP_USE_VBN(&direct->d_bmap)) req->bpr_ptr = nilfs_direct_find_target_v(direct, key); ret = nilfs_bmap_prepare_alloc_ptr(&direct->d_bmap, req); if (ret < 0) return ret; stats->bs_nblocks = 1; return 0; }