+ unpacked->bi_inum = inode.k->p.offset;
+ unpacked->bi_journal_seq= 0;
+ unpacked->bi_hash_seed = inode.v->bi_hash_seed;
+ unpacked->bi_flags = le32_to_cpu(inode.v->bi_flags);
+ unpacked->bi_mode = le16_to_cpu(inode.v->bi_mode);
+
+ if (INODE_NEW_VARINT(inode.v)) {
+ return bch2_inode_unpack_v2(unpacked, inode.v->fields,
+ bkey_val_end(inode),
+ INODE_NR_FIELDS(inode.v));
+ } else {
+ return bch2_inode_unpack_v1(inode, unpacked);
+ }
+ break;
+ }
+ case KEY_TYPE_inode_v2: {
+ struct bkey_s_c_inode_v2 inode = bkey_s_c_to_inode_v2(k);
+
+ unpacked->bi_inum = inode.k->p.offset;
+ unpacked->bi_journal_seq= le64_to_cpu(inode.v->bi_journal_seq);
+ unpacked->bi_hash_seed = inode.v->bi_hash_seed;
+ unpacked->bi_flags = le64_to_cpu(inode.v->bi_flags);
+ unpacked->bi_mode = le16_to_cpu(inode.v->bi_mode);
+
+ return bch2_inode_unpack_v2(unpacked, inode.v->fields,
+ bkey_val_end(inode),
+ INODEv2_NR_FIELDS(inode.v));
+ }
+ default:
+ BUG();
+ }
+}
+
+int bch2_inode_peek(struct btree_trans *trans,
+ struct btree_iter *iter,
+ struct bch_inode_unpacked *inode,
+ subvol_inum inum, unsigned flags)
+{
+ struct bkey_s_c k;
+ u32 snapshot;
+ int ret;
+
+ ret = bch2_subvolume_get_snapshot(trans, inum.subvol, &snapshot);
+ if (ret)
+ return ret;
+
+ bch2_trans_iter_init(trans, iter, BTREE_ID_inodes,
+ SPOS(0, inum.inum, snapshot),
+ flags|BTREE_ITER_CACHED);
+ k = bch2_btree_iter_peek_slot(iter);
+ ret = bkey_err(k);
+ if (ret)
+ goto err;
+
+ ret = bkey_is_inode(k.k) ? 0 : -ENOENT;
+ if (ret)
+ goto err;
+
+ ret = bch2_inode_unpack(k, inode);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ bch2_trans_iter_exit(trans, iter);
+ return ret;
+}
+
+int bch2_inode_write(struct btree_trans *trans,
+ struct btree_iter *iter,
+ struct bch_inode_unpacked *inode)
+{
+ struct bkey_inode_buf *inode_p;
+
+ inode_p = bch2_trans_kmalloc(trans, sizeof(*inode_p));
+ if (IS_ERR(inode_p))
+ return PTR_ERR(inode_p);
+
+ bch2_inode_pack(trans->c, inode_p, inode);
+ inode_p->inode.k.p.snapshot = iter->snapshot;
+ return bch2_trans_update(trans, iter, &inode_p->inode.k_i, 0);
+}