linux-toradex.git/include/linux/sunrpc/clnt.h, branch v3.4.73

SUNRPC: Add API to acquire source address

2012-03-02T20:36:53+00:00

NFSv4.0 clients must send endpoint information for their callback
service to NFSv4.0 servers during their first contact with a server.
Traditionally on Linux, user space provides the callback endpoint IP
address via the "clientaddr=" mount option.

During an NFSv4 migration event, it is possible that an FSID may be
migrated to a destination server that is accessible via a different
source IP address than the source server was.  The client must update
callback endpoint information on the destination server so that it can
maintain leases and allow delegation.

Without a new "clientaddr=" option from user space, however, the
kernel itself must construct an appropriate IP address for the
callback update.  Provide an API in the RPC client for upper layer
RPC consumers to acquire a source address for a remote.

The mechanism used by the mount.nfs command is copied: set up a
connected UDP socket to the designated remote, then scrape the source
address off the socket.  We are careful to select the correct network
namespace when setting up the temporary UDP socket.

Signed-off-by: Chuck Lever 
Signed-off-by: Trond Myklebust

SUNRPC: Move clnt->cl_server into struct rpc_xprt

2012-03-02T20:36:41+00:00

When the cl_xprt field is updated, the cl_server field will also have
to change.  Since the contents of cl_server follow the remote endpoint
of cl_xprt, just move that field to the rpc_xprt.

Signed-off-by: Trond Myklebust 
[ cel: simplify check_gss_callback_principal(), whitespace changes ]
[ cel: forward ported to 3.4 ]
Signed-off-by: Chuck Lever 
Signed-off-by: Trond Myklebust

SUNRPC: Use RCU to dereference the rpc_clnt.cl_xprt field

2012-03-02T20:36:38+00:00

A migration event will replace the rpc_xprt used by an rpc_clnt.  To
ensure this can be done safely, all references to cl_xprt must now use
a form of rcu_dereference().

Special care is taken with rpc_peeraddr2str(), which returns a pointer
to memory whose lifetime is the same as the rpc_xprt.

Signed-off-by: Trond Myklebust 
[ cel: fix lockdep splats and layering violations ]
[ cel: forward ported to 3.4 ]
[ cel: remove rpc_max_reqs(), add rpc_net_ns() ]
Signed-off-by: Chuck Lever 
Signed-off-by: Trond Myklebust

SUNRPC: constify the rpc_program

2012-02-01T00:28:20+00:00

Signed-off-by: Trond Myklebust

SUNRPC: constify rpc_program->name

2012-02-01T00:28:20+00:00

Signed-off-by: Trond Myklebust

SUNRPC: constify rpc_clnt fields cl_server and cl_protname

2012-02-01T00:28:19+00:00

...and get rid of the superfluous cl_inline_name.

Signed-off-by: Trond Myklebust

SUNRPC: parametrize rpc_uaddr2sockaddr() by network context

2012-02-01T00:28:12+00:00

Parametrize rpc_uaddr2sockaddr() by network context and thus force it's callers to pass
in network context instead of using hard-coded "init_net".

Signed-off-by: Stanislav Kinsbursky 
Signed-off-by: Trond Myklebust

SUNRPC: parametrize rpc_pton() by network context

2012-02-01T00:28:12+00:00

Parametrize rpc_pton() by network context and thus force it's callers to pass
in network context instead of using hard-coded "init_net".

Signed-off-by: Stanislav Kinsbursky 
Signed-off-by: Trond Myklebust

SUNRPC: parametrize local rpcbind clients creation with net ns

2012-02-01T00:28:11+00:00

These client are per network namespace and thus can be created for different
network namespaces.

Signed-off-by: Stanislav Kinsbursky 
Signed-off-by: Trond Myklebust

SUNRPC: register rpcbind programs in passed network namespase context

2012-02-01T00:28:10+00:00

Registering rpcbind program requires rpcbind clients, which are per network
namespace context.

Signed-off-by: Stanislav Kinsbursky 
Signed-off-by: Trond Myklebust