/usr/include/glusterfs/rpc/ is in glusterfs-common 3.8.8-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/glusterfs/rpc/acl3-xdr.h
/usr/include/glusterfs/rpc/changelog-xdr.h
/usr/include/glusterfs/rpc/cli1-xdr.h
/usr/include/glusterfs/rpc/glusterd1-xdr.h
/usr/include/glusterfs/rpc/glusterfs-fops.h
/usr/include/glusterfs/rpc/glusterfs3-xdr.h
/usr/include/glusterfs/rpc/glusterfs3.h
/usr/include/glusterfs/rpc/mount3udp.h
/usr/include/glusterfs/rpc/msg-nfs3.h
/usr/include/glusterfs/rpc/nlm4-xdr.h
/usr/include/glusterfs/rpc/nsm-xdr.h
/usr/include/glusterfs/rpc/portmap-xdr.h
/usr/include/glusterfs/rpc/protocol-common.h
/usr/include/glusterfs/rpc/rpc-clnt-ping.h
/usr/include/glusterfs/rpc/rpc-clnt.h
/usr/include/glusterfs/rpc/rpc-common-xdr.h
/usr/include/glusterfs/rpc/rpc-drc.h
/usr/include/glusterfs/rpc/rpc-lib-messages.h
/usr/include/glusterfs/rpc/rpc-transport.h
/usr/include/glusterfs/rpc/rpcsvc-common.h
/usr/include/glusterfs/rpc/rpcsvc.h
/usr/include/glusterfs/rpc/xdr-common.h
/usr/include/glusterfs/rpc/xdr-generic.h
/usr/include/glusterfs/rpc/xdr-nfs3.h
/usr/include/glusterfs/rpc/xdr-rpc.h
/usr/include/glusterfs/rpc/xdr-rpcclnt.h