SUNRPC: Clean up static inline functions in svc_xprt.h

Clean up:  Enable the use of const arguments in higher level svc_ APIs
by adding const to the arguments of the helper functions in svc_xprt.h

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h
index 0127dac..959b931 100644 (file)
--- a/include/linux/sunrpc/svc_xprt.h
+++ b/include/linux/sunrpc/svc_xprt.h
@@ -88,29 +88,32 @@ static inline void svc_xprt_get(struct svc_xprt *xprt)
        kref_get(&xprt->xpt_ref);
 }
 static inline void svc_xprt_set_local(struct svc_xprt *xprt,
-                                     struct sockaddr *sa, int salen)
+                                     const struct sockaddr *sa,
+                                     const size_t salen)
 {
        memcpy(&xprt->xpt_local, sa, salen);
        xprt->xpt_locallen = salen;
 }
 static inline void svc_xprt_set_remote(struct svc_xprt *xprt,
-                                      struct sockaddr *sa, int salen)
+                                      const struct sockaddr *sa,
+                                      const size_t salen)
 {
        memcpy(&xprt->xpt_remote, sa, salen);
        xprt->xpt_remotelen = salen;
 }
-static inline unsigned short svc_addr_port(struct sockaddr *sa)
+static inline unsigned short svc_addr_port(const struct sockaddr *sa)
 {
-       unsigned short ret = 0;
+       const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
+       const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
+
        switch (sa->sa_family) {
        case AF_INET:
-               ret = ntohs(((struct sockaddr_in *)sa)->sin_port);
-               break;
+               return ntohs(sin->sin_port);
        case AF_INET6:
-               ret = ntohs(((struct sockaddr_in6 *)sa)->sin6_port);
-               break;
+               return ntohs(sin6->sin6_port);
        }
-       return ret;
+
+       return 0;
 }
 
 static inline size_t svc_addr_len(struct sockaddr *sa)
@@ -124,36 +127,39 @@ static inline size_t svc_addr_len(struct sockaddr *sa)
        return -EAFNOSUPPORT;
 }
 
-static inline unsigned short svc_xprt_local_port(struct svc_xprt *xprt)
+static inline unsigned short svc_xprt_local_port(const struct svc_xprt *xprt)
 {
-       return svc_addr_port((struct sockaddr *)&xprt->xpt_local);
+       return svc_addr_port((const struct sockaddr *)&xprt->xpt_local);
 }
 
-static inline unsigned short svc_xprt_remote_port(struct svc_xprt *xprt)
+static inline unsigned short svc_xprt_remote_port(const struct svc_xprt *xprt)
 {
-       return svc_addr_port((struct sockaddr *)&xprt->xpt_remote);
+       return svc_addr_port((const struct sockaddr *)&xprt->xpt_remote);
 }
 
-static inline char *__svc_print_addr(struct sockaddr *addr,
-                                    char *buf, size_t len)
+static inline char *__svc_print_addr(const struct sockaddr *addr,
+                                    char *buf, const size_t len)
 {
+       const struct sockaddr_in *sin = (const struct sockaddr_in *)addr;
+       const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)addr;
+
        switch (addr->sa_family) {
        case AF_INET:
-               snprintf(buf, len, "%pI4, port=%u",
-                       &((struct sockaddr_in *)addr)->sin_addr,
-                       ntohs(((struct sockaddr_in *) addr)->sin_port));
+               snprintf(buf, len, "%pI4, port=%u", &sin->sin_addr,
+                       ntohs(sin->sin_port));
                break;
 
        case AF_INET6:
                snprintf(buf, len, "%pI6, port=%u",
-                        &((struct sockaddr_in6 *)addr)->sin6_addr,
-                       ntohs(((struct sockaddr_in6 *) addr)->sin6_port));
+                        &sin6->sin6_addr,
+                       ntohs(sin6->sin6_port));
                break;
 
        default:
                snprintf(buf, len, "unknown address type: %d", addr->sa_family);
                break;
        }
+
        return buf;
 }
 #endif /* SUNRPC_SVC_XPRT_H */