These two patches cause the SUNRPC layer in Linux to attempt to contact
rpcbind using an AF_UNIX socket with an abstract address before
the existing attempts of AF_UNIX to a socket in the filesystem, and IP
to a well known port.

This allows the benefits of an AF_UNIX connection combined with the
benefits of honouring the network namespace when connection rpcbind.

For this to be useful, rpcbind must listed on that name, and user-space
tools must also connect to the same address.  This requires changes to
rpcbind and too libtirpc.  libtirpc currently has a bug which causes
sockets bountd to abstract addresses to appear to be unbound, so asking
systemd to pass rpcbind an abstract socket doesn't work - rpcbind
rejects it.

Patches for rpcbind and libtirpc will follow.

NeilBrown


---

NeilBrown (2):
      SUNRPC: support abstract unix socket addresses
      SUNRPC: attempt to reach rpcbind with an abstract socket name


 net/sunrpc/clnt.c      |  8 ++++++--
 net/sunrpc/rpcb_clnt.c | 39 +++++++++++++++++++++++++++++++--------
 net/sunrpc/xprtsock.c  |  9 +++++++--
 3 files changed, 44 insertions(+), 12 deletions(-)

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