SUNRPC: Pass a family argument to svc_register()

The sv_family field is going away.  Instead of using sv_family, have
the svc_register() function take a protocol family argument.

Since this argument represents a protocol family, and not an address
family, this argument takes an int, as this is what is passed to
sock_create_kern().  Also make sure svc_register's helpers are
checking for PF_FOO instead of AF_FOO.  The value of [AP]F_FOO are
equivalent; this is simply a symbolic change to reflect the semantics
of the value stored in that variable.

sock_create_kern() should return EPFNOSUPPORT if the passed-in
protocol family isn't supported, but it uses EAFNOSUPPORT for this
case.  We will stick with that tradition here, as svc_register()
is called by the RPC server in the same path as sock_create_kern().

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

2 files changed, 12 insertions, 11 deletions

diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index c51fed4d1af1..41bc36ea2224 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -800,17 +800,17 @@ static int __svc_rpcb_register6(const u32 program, const u32 version,
  * if any error occurs.
  */
 static int __svc_register(const u32 program, const u32 version,
-                          const sa_family_t family,
+                          const int family,
                           const unsigned short protocol,
                           const unsigned short port)
 {
         int error;
 
         switch (family) {
-        case AF_INET:
+        case PF_INET:
                 return __svc_rpcb_register4(program, version,
                                                 protocol, port);
-        case AF_INET6:
+        case PF_INET6:
                 error = __svc_rpcb_register6(program, version,
                                                 protocol, port);
                 if (error < 0)
@@ -840,11 +840,11 @@ static int __svc_register(const u32 program, const u32 version,
  * if any error occurs.
  */
 static int __svc_register(const u32 program, const u32 version,
-                          sa_family_t family,
+                          const int family,
                           const unsigned short protocol,
                           const unsigned short port)
 {
-        if (family != AF_INET)
+        if (family != PF_INET)
                 return -EAFNOSUPPORT;
 
         return rpcb_register(program, version, protocol, port);
@@ -855,13 +855,14 @@ static int __svc_register(const u32 program, const u32 version,
 /**
  * svc_register - register an RPC service with the local portmapper
  * @serv: svc_serv struct for the service to register
+ * @family: protocol family of service's listener socket
  * @proto: transport protocol number to advertise
  * @port: port to advertise
  *
- * Service is registered for any address in serv's address family
+ * Service is registered for any address in the passed-in protocol family
  */
-int svc_register(const struct svc_serv *serv, const unsigned short proto,
-                 const unsigned short port)
+int svc_register(const struct svc_serv *serv, const int family,
+                 const unsigned short proto, const unsigned short port)
 {
         struct svc_program      *progp;
         unsigned int            i;
@@ -879,7 +880,7 @@ int svc_register(const struct svc_serv *serv, const unsigned short proto,
                                         i,
                                         proto == IPPROTO_UDP?  "udp" : "tcp",
                                         port,
-                                        serv->sv_family,
+                                        family,
                                         progp->pg_vers[i]->vs_hidden?
                                                 " (but not telling portmap)" : "");
 
@@ -887,7 +888,7 @@ int svc_register(const struct svc_serv *serv, const unsigned short proto,
                                 continue;
 
                         error = __svc_register(progp->pg_prog, i,
-                                                serv->sv_family, proto, port);
+                                                family, proto, port);
                         if (error < 0)
                                 break;
                 }
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 5763e6460fea..d00583c1cd04 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1122,7 +1122,7 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
 
         /* Register socket with portmapper */
         if (*errp >= 0 && pmap_register)
-                *errp = svc_register(serv, inet->sk_protocol,
+                *errp = svc_register(serv, serv->sv_family, inet->sk_protocol,
                                      ntohs(inet_sk(inet)->sport));
 
         if (*errp < 0) {