[DECnet]: Endian annotation and fixes for DECnet.

The typedef for dn_address has been removed in favour of using __le16
or __u16 directly as appropriate. All the DECnet header files are
updated accordingly.

The byte ordering of dn_eth2dn() and dn_dn2eth() are both changed
since just about all their callers wanted network order rather than
host order, so the conversion is now done in the functions themselves.

Several missed endianess conversions have been picked up during the
conversion process. The nh_gw field in struct dn_fib_info has been
changed from a 32 bit field to 16 bits as it ought to be.

One or two cases of using htons rather than dn_htons in the routing
code have been found and fixed.

There are still a few warnings to fix, but this patch deals with the
important cases.

Signed-off-by: Steven Whitehouse <steve@chygwyn.com>
Signed-off-by: Patrick Caulfield <patrick@tykepenguin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 52 insertions, 53 deletions

diff --git a/include/net/dn.h b/include/net/dn.h
index a4b6168..465b783 100644
--- a/include/net/dn.h
+++ b/include/net/dn.h
@@ -6,10 +6,8 @@
 #include <net/tcp.h>
 #include <asm/byteorder.h>
 
-typedef unsigned short dn_address;
-
-#define dn_ntohs(x) le16_to_cpu((unsigned short)(x))
-#define dn_htons(x) cpu_to_le16((unsigned short)(x))
+#define dn_ntohs(x) le16_to_cpu(x)
+#define dn_htons(x) cpu_to_le16(x)
 
 struct dn_scp                                   /* Session Control Port */
 {
@@ -31,36 +29,36 @@ struct dn_scp                                   /* Session Control Port */
 #define DN_CL    15                     /* Closed               */
 #define DN_CN    16                     /* Closed Notification  */
 
-        unsigned short          addrloc;
-        unsigned short          addrrem;
-        unsigned short          numdat;
-        unsigned short          numoth;
-        unsigned short          numoth_rcv;
-        unsigned short          numdat_rcv;
-        unsigned short          ackxmt_dat;
-        unsigned short          ackxmt_oth;
-        unsigned short          ackrcv_dat;
-        unsigned short          ackrcv_oth;
-        unsigned char           flowrem_sw;
-	unsigned char		flowloc_sw;
+        __le16          addrloc;
+        __le16          addrrem;
+        __u16          numdat;
+        __u16          numoth;
+        __u16          numoth_rcv;
+        __u16          numdat_rcv;
+        __u16          ackxmt_dat;
+        __u16          ackxmt_oth;
+        __u16          ackrcv_dat;
+        __u16          ackrcv_oth;
+        __u8           flowrem_sw;
+	__u8           flowloc_sw;
 #define DN_SEND         2
 #define DN_DONTSEND     1
 #define DN_NOCHANGE     0
-	unsigned short		flowrem_dat;
-	unsigned short		flowrem_oth;
-	unsigned short		flowloc_dat;
-	unsigned short		flowloc_oth;
-	unsigned char		services_rem;
-	unsigned char		services_loc;
-	unsigned char		info_rem;
-	unsigned char		info_loc;
-
-	unsigned short		segsize_rem;
-	unsigned short		segsize_loc;
-
-	unsigned char		nonagle;
-	unsigned char		multi_ireq;
-	unsigned char		accept_mode;
+	__u16		flowrem_dat;
+	__u16		flowrem_oth;
+	__u16		flowloc_dat;
+	__u16		flowloc_oth;
+	__u8		services_rem;
+	__u8		services_loc;
+	__u8		info_rem;
+	__u8		info_loc;
+
+	__u16		segsize_rem;
+	__u16		segsize_loc;
+
+	__u8		nonagle;
+	__u8		multi_ireq;
+	__u8		accept_mode;
 	unsigned long		seg_total; /* Running total of current segment */
 
 	struct optdata_dn     conndata_in;
@@ -160,40 +158,41 @@ static inline struct dn_scp *DN_SK(struct sock *sk)
  */
 #define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb)
 struct dn_skb_cb {
-	unsigned short dst;
-	unsigned short src;
-	unsigned short hops;
-	unsigned short dst_port;
-	unsigned short src_port;
-	unsigned char services;
-	unsigned char info;
-	unsigned char rt_flags;
-	unsigned char nsp_flags;
-	unsigned short segsize;
-	unsigned short segnum;
-	unsigned short xmit_count;
+	__le16 dst;
+	__le16 src;
+	__u16 hops;
+	__le16 dst_port;
+	__le16 src_port;
+	__u8 services;
+	__u8 info;
+	__u8 rt_flags;
+	__u8 nsp_flags;
+	__u16 segsize;
+	__u16 segnum;
+	__u16 xmit_count;
 	unsigned long stamp;
 	int iif;
 };
 
-static inline dn_address dn_eth2dn(unsigned char *ethaddr)
+static inline __le16 dn_eth2dn(unsigned char *ethaddr)
 {
-	return ethaddr[4] | (ethaddr[5] << 8);
+	return dn_htons(ethaddr[4] | (ethaddr[5] << 8));
 }
 
-static inline dn_address dn_saddr2dn(struct sockaddr_dn *saddr)
+static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr)
 {
-	return *(dn_address *)saddr->sdn_nodeaddr;
+	return *(__le16 *)saddr->sdn_nodeaddr;
 }
 
-static inline void dn_dn2eth(unsigned char *ethaddr, dn_address addr)
+static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr)
 {
+	__u16 a = dn_ntohs(addr);
 	ethaddr[0] = 0xAA;
 	ethaddr[1] = 0x00;
 	ethaddr[2] = 0x04;
 	ethaddr[3] = 0x00;
-	ethaddr[4] = (unsigned char)(addr & 0xff);
-	ethaddr[5] = (unsigned char)(addr >> 8);
+	ethaddr[4] = (__u8)(a & 0xff);
+	ethaddr[5] = (__u8)(a >> 8);
 }
 
 static inline void dn_sk_ports_copy(struct flowi *fl, struct dn_scp *scp)
@@ -202,7 +201,7 @@ static inline void dn_sk_ports_copy(struct flowi *fl, struct dn_scp *scp)
 	fl->uli_u.dnports.dport = scp->addrrem;
 	fl->uli_u.dnports.objnum = scp->addr.sdn_objnum;
 	if (fl->uli_u.dnports.objnum == 0) {
-		fl->uli_u.dnports.objnamel = scp->addr.sdn_objnamel;
+		fl->uli_u.dnports.objnamel = (__u8)dn_ntohs(scp->addr.sdn_objnamel);
 		memcpy(fl->uli_u.dnports.objname, scp->addr.sdn_objname, 16);
 	}
 }
@@ -217,7 +216,7 @@ extern unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu);
 extern struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
 extern struct sock *dn_find_by_skb(struct sk_buff *skb);
 #define DN_ASCBUF_LEN 9
-extern char *dn_addr2asc(dn_address, char *);
+extern char *dn_addr2asc(__u16, char *);
 extern int dn_destroy_timer(struct sock *sk);
 
 extern int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf, unsigned char type);
@@ -226,7 +225,7 @@ extern int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn
 extern void dn_start_slow_timer(struct sock *sk);
 extern void dn_stop_slow_timer(struct sock *sk);
 
-extern dn_address decnet_address;
+extern __le16 decnet_address;
 extern int decnet_debug_level;
 extern int decnet_time_wait;
 extern int decnet_dn_count;