SUNRPC: Provide functions for managing universal addresses

Introduce a set of functions in the kernel's RPC implementation for
converting between a socket address and either a standard
presentation address string or an RPC universal address.

The universal address functions will be used to encode and decode
RPCB_FOO and NFSv4 SETCLIENTID arguments.  The other functions are
part of a previous promise to deliver shared functions that can be
used by upper-layer protocols to display and manipulate IP
addresses.

The kernel's current address printf formatters were designed
specifically for kernel to user-space APIs that require a particular
string format for socket addresses, thus are somewhat limited for the
purposes of sunrpc.ko.  The formatter for IPv6 addresses, %pI6, does
not support short-handing or scope IDs.  Also, these printf formatters
are unique per address family, so a separate formatter string is
required for printing AF_INET and AF_INET6 addresses.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 8d2b71d57d29..ff68397f9b19 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -370,8 +370,6 @@ unsigned int nfs_page_array_len(unsigned int base, size_t len)
                 PAGE_SIZE - 1) >> PAGE_SHIFT;
 }
 
-#define IPV6_SCOPE_DELIMITER    '%'
-
 /*
  * Set the port number in an address.  Be agnostic about the address
  * family.