NFS: Change nfs_find_client() to take "struct sockaddr *"

Adjust arguments and callers of nfs_find_client() to pass a
"struct sockaddr *" instead of "struct sockaddr_in *" to support non-IPv4
addresses.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>

Trond: Also fix up protocol version number argument in nfs_find_client() to
use the correct u32 type.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/callback.c

@@ -164,12 +164,11 @@ void nfs_callback_down(void)
 
 static int nfs_callback_authenticate(struct svc_rqst *rqstp)
 {
-	struct sockaddr_in *addr = svc_addr_in(rqstp);
 	struct nfs_client *clp;
 	char buf[RPC_MAX_ADDRBUFLEN];
 
 	/* Don't talk to strangers */
-	clp = nfs_find_client(addr, 4);
+	clp = nfs_find_client(svc_addr(rqstp), 4);
 	if (clp == NULL)
 		return SVC_DROP;
 

fs/nfs/callback_proc.c

@@ -25,7 +25,7 @@ __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *
 
 	res->bitmap[0] = res->bitmap[1] = 0;
 	res->status = htonl(NFS4ERR_BADHANDLE);
-	clp = nfs_find_client((struct sockaddr_in *)args->addr, 4);
+	clp = nfs_find_client(args->addr, 4);
 	if (clp == NULL)
 		goto out;
 
@@ -68,7 +68,7 @@ __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
 	__be32 res;
 	
 	res = htonl(NFS4ERR_BADHANDLE);
-	clp = nfs_find_client((struct sockaddr_in *)args->addr, 4);
+	clp = nfs_find_client(args->addr, 4);
 	if (clp == NULL)
 		goto out;
 

fs/nfs/client.c

@@ -242,7 +242,7 @@ static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
  * Find a client by IP address and protocol version
  * - returns NULL if no such client
  */
-struct nfs_client *_nfs_find_client(const struct sockaddr *addr, int nfsversion)
+struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion)
 {
 	struct nfs_client *clp;
 
@@ -272,11 +272,6 @@ struct nfs_client *_nfs_find_client(const struct sockaddr *addr, int nfsversion)
 	return NULL;
 }
 
-struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion)
-{
-	return _nfs_find_client((const struct sockaddr *)addr, nfsversion);
-}
-
 /*
  * Find an nfs_client on the list that matches the initialisation data
  * that is supplied.

fs/nfs/internal.h

@@ -60,7 +60,7 @@ struct nfs_parsed_mount_data {
 extern struct rpc_program nfs_program;
 
 extern void nfs_put_client(struct nfs_client *);
-extern struct nfs_client *nfs_find_client(const struct sockaddr_in *, int);
+extern struct nfs_client *nfs_find_client(const struct sockaddr *, u32);
 extern struct nfs_server *nfs_create_server(
 					const struct nfs_parsed_mount_data *,
 					struct nfs_fh *);