+static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *data)
+{
+ struct nfs_server *server = NFS_SB(sb);
+ struct nfs_server *parent = NFS_SB(data->sb);
+ struct inode *root_inode;
+ struct nfs_fsinfo fsinfo;
+ void *err = ERR_PTR(-ENOMEM);
+
+ sb->s_op = data->sb->s_op;
+ sb->s_blocksize = data->sb->s_blocksize;
+ sb->s_blocksize_bits = data->sb->s_blocksize_bits;
+ sb->s_maxbytes = data->sb->s_maxbytes;
+
+ server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
+ server->io_stats = nfs_alloc_iostats();
+ if (server->io_stats == NULL)
+ goto out;
+
+ server->client = rpc_clone_client(parent->client);
+ if (IS_ERR((err = server->client)))
+ goto out;
+
+ if (!IS_ERR(parent->client_sys)) {
+ server->client_sys = rpc_clone_client(parent->client_sys);
+ if (IS_ERR((err = server->client_sys)))
+ goto out;
+ }
+ if (!IS_ERR(parent->client_acl)) {
+ server->client_acl = rpc_clone_client(parent->client_acl);
+ if (IS_ERR((err = server->client_acl)))
+ goto out;
+ }
+ root_inode = nfs_fhget(sb, data->fh, data->fattr);
+ if (!root_inode)
+ goto out;
+ sb->s_root = d_alloc_root(root_inode);
+ if (!sb->s_root)
+ goto out_put_root;
+ fsinfo.fattr = data->fattr;
+ if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0)
+ nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
+ sb->s_root->d_op = server->rpc_ops->dentry_ops;
+ sb->s_flags |= MS_ACTIVE;
+ return server;
+out_put_root:
+ iput(root_inode);
+out:
+ return err;
+}
+