Hi- This is server-side support for RPC-with-TLS, to accompany similar support in the Linux NFS client. This implementation can support both the opportunistic use of transport layer security (it will be used if the client cares to) and the required use of transport layer security (the server requires the client to use it to access a particular export). The kernel patches, along with the the handshake upcall, are carried in the topic-rpc-with-tls-upcall branch available from: https://git.kernel.org/pub/scm/linux/kernel/git/cel/linux.git The user space componenet of the upcall can be found in the netlink-v7 branch from: https://github.com/oracle/ktls-utils This work includes a man page, tlshd(8), that explains how to set up certificates for the server to use. Currently, NFS support for RPC-with-TLS does not implement support for pre-shared keys. Without any other user space componentry, this implementation will be able to handle clients that request the use of RPC-with-TLS. To support security policies that restrict access to exports based on the client's use of TLS, modifications to exportfs and mountd are needed. These can be found here: git://git.linux-nfs.org/projects/cel/nfs-utils.git They include an update to exports(5) explaining how to use the new "xprtsec=" export option. I will post these for review under separate cover. --- Chuck Lever (5): SUNRPC: Revert 987c7b1d094d SUNRPC: Recognize control messages in server-side TCP socket code SUNRPC: Ensure server-side sockets have a sock->file SUNRPC: Support TLS handshake in the server-side TCP socket code NFSD: Handle new xprtsec= export option fs/nfsd/export.c | 53 +++++++++- fs/nfsd/export.h | 11 ++ include/linux/sunrpc/svc_xprt.h | 5 +- include/linux/sunrpc/svcsock.h | 2 + include/trace/events/sunrpc.h | 42 +++++++- net/sunrpc/svc_xprt.c | 5 +- net/sunrpc/svcauth_unix.c | 11 +- net/sunrpc/svcsock.c | 177 +++++++++++++++++++++++++++++--- 8 files changed, 284 insertions(+), 22 deletions(-) -- Chuck Lever
