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Date: Fri, 19 Sep 2008 12:24:48 -0300
From: Arnaldo Carvalho de Melo <acme@...hat.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: Rémi Denis-Courmont
<remi.denis-courmont@...ia.com>, netdev@...r.kernel.org
Subject: [PATCH]: net: Use hton[sl]() was Re: [PATCH 10/14] Phonet: Phonet
datagram transport protocol
Em Fri, Sep 19, 2008 at 09:33:33AM +0300, Rémi Denis-Courmont escreveu:
> On Tuesday 16 September 2008 20:06:44 ext Arnaldo Carvalho de Melo, you wrote:
> > > + ph->robj = pn_obj(dst);
> > > + ph->sobj = pn_obj(src);
> > > +
> > > + skb->protocol = __constant_htons(ETH_P_PHONET);
> >
> > No need for __constant_htons(CONSTANT), htons will do the right thing
> > and the code will be shorter, clearer.
>
> Ok. There are quite many of these in net/ though... is that reserved for
> switch/case only?
Nope, they should only be used when initializing static variables.
David, the following patch converts what is in net-next-2.6 net/ now:
commit 8e64a880d1f8a3df44648e0109f22a22322acc56
Author: Arnaldo Carvalho de Melo <acme@...hat.com>
Date: Fri Sep 19 11:34:45 2008 -0300
net: Use hton[sl]() instead of __constant_hton[sl]() where applicable
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 97688cd..8883e9c 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -48,7 +48,7 @@ static int vlan_dev_rebuild_header(struct sk_buff *skb)
switch (veth->h_vlan_encapsulated_proto) {
#ifdef CONFIG_INET
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
/* TODO: Confirm this will work with VLAN headers... */
return arp_find(veth->h_dest, skb);
diff --git a/net/atm/br2684.c b/net/atm/br2684.c
index 8d9a6f1..280de48 100644
--- a/net/atm/br2684.c
+++ b/net/atm/br2684.c
@@ -375,11 +375,11 @@ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
if (memcmp
(skb->data + 6, ethertype_ipv6,
sizeof(ethertype_ipv6)) == 0)
- skb->protocol = __constant_htons(ETH_P_IPV6);
+ skb->protocol = htons(ETH_P_IPV6);
else if (memcmp
(skb->data + 6, ethertype_ipv4,
sizeof(ethertype_ipv4)) == 0)
- skb->protocol = __constant_htons(ETH_P_IP);
+ skb->protocol = htons(ETH_P_IP);
else
goto error;
skb_pull(skb, sizeof(llc_oui_ipv4));
@@ -404,9 +404,9 @@ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
skb_reset_network_header(skb);
iph = ip_hdr(skb);
if (iph->version == 4)
- skb->protocol = __constant_htons(ETH_P_IP);
+ skb->protocol = htons(ETH_P_IP);
else if (iph->version == 6)
- skb->protocol = __constant_htons(ETH_P_IPV6);
+ skb->protocol = htons(ETH_P_IPV6);
else
goto error;
skb->pkt_type = PACKET_HOST;
diff --git a/net/core/dev.c b/net/core/dev.c
index f48d1b2..fdfc4b6 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1675,13 +1675,13 @@ static u16 simple_tx_hash(struct net_device *dev, struct sk_buff *skb)
}
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
ip_proto = ip_hdr(skb)->protocol;
addr1 = ip_hdr(skb)->saddr;
addr2 = ip_hdr(skb)->daddr;
ihl = ip_hdr(skb)->ihl;
break;
- case __constant_htons(ETH_P_IPV6):
+ case htons(ETH_P_IPV6):
ip_proto = ipv6_hdr(skb)->nexthdr;
addr1 = ipv6_hdr(skb)->saddr.s6_addr32[3];
addr2 = ipv6_hdr(skb)->daddr.s6_addr32[3];
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index a80839b..647a9ed 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -129,7 +129,7 @@ int eth_rebuild_header(struct sk_buff *skb)
switch (eth->h_proto) {
#ifdef CONFIG_INET
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
return arp_find(eth->h_dest, skb);
#endif
default:
diff --git a/net/ipv4/ipvs/ip_vs_core.c b/net/ipv4/ipvs/ip_vs_core.c
index ece748d..958abf3 100644
--- a/net/ipv4/ipvs/ip_vs_core.c
+++ b/net/ipv4/ipvs/ip_vs_core.c
@@ -938,7 +938,7 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb,
EnterFunction(11);
- af = (skb->protocol == __constant_htons(ETH_P_IP)) ? AF_INET : AF_INET6;
+ af = (skb->protocol == htons(ETH_P_IP)) ? AF_INET : AF_INET6;
if (skb->ipvs_property)
return NF_ACCEPT;
@@ -1258,7 +1258,7 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb,
struct ip_vs_conn *cp;
int ret, restart, af;
- af = (skb->protocol == __constant_htons(ETH_P_IP)) ? AF_INET : AF_INET6;
+ af = (skb->protocol == htons(ETH_P_IP)) ? AF_INET : AF_INET6;
ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 17c7b09..64ce3d3 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1050,10 +1050,10 @@ ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
}
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
ret = ip4ip6_tnl_xmit(skb, dev);
break;
- case __constant_htons(ETH_P_IPV6):
+ case htons(ETH_P_IPV6):
ret = ip6ip6_tnl_xmit(skb, dev);
break;
default:
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
index 7229e95..5966b9f 100644
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -39,7 +39,7 @@ static unsigned int classify_1d(struct sk_buff *skb)
return skb->priority - 256;
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
dscp = ip_hdr(skb)->tos & 0xfc;
break;
diff --git a/net/sched/cls_flow.c b/net/sched/cls_flow.c
index 8f63a1a..0ebaff6 100644
--- a/net/sched/cls_flow.c
+++ b/net/sched/cls_flow.c
@@ -67,9 +67,9 @@ static inline u32 addr_fold(void *addr)
static u32 flow_get_src(const struct sk_buff *skb)
{
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
return ntohl(ip_hdr(skb)->saddr);
- case __constant_htons(ETH_P_IPV6):
+ case htons(ETH_P_IPV6):
return ntohl(ipv6_hdr(skb)->saddr.s6_addr32[3]);
default:
return addr_fold(skb->sk);
@@ -79,9 +79,9 @@ static u32 flow_get_src(const struct sk_buff *skb)
static u32 flow_get_dst(const struct sk_buff *skb)
{
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
return ntohl(ip_hdr(skb)->daddr);
- case __constant_htons(ETH_P_IPV6):
+ case htons(ETH_P_IPV6):
return ntohl(ipv6_hdr(skb)->daddr.s6_addr32[3]);
default:
return addr_fold(skb->dst) ^ (__force u16)skb->protocol;
@@ -91,9 +91,9 @@ static u32 flow_get_dst(const struct sk_buff *skb)
static u32 flow_get_proto(const struct sk_buff *skb)
{
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
return ip_hdr(skb)->protocol;
- case __constant_htons(ETH_P_IPV6):
+ case htons(ETH_P_IPV6):
return ipv6_hdr(skb)->nexthdr;
default:
return 0;
@@ -120,7 +120,7 @@ static u32 flow_get_proto_src(const struct sk_buff *skb)
u32 res = 0;
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP): {
+ case htons(ETH_P_IP): {
struct iphdr *iph = ip_hdr(skb);
if (!(iph->frag_off&htons(IP_MF|IP_OFFSET)) &&
@@ -128,7 +128,7 @@ static u32 flow_get_proto_src(const struct sk_buff *skb)
res = ntohs(*(__be16 *)((void *)iph + iph->ihl * 4));
break;
}
- case __constant_htons(ETH_P_IPV6): {
+ case htons(ETH_P_IPV6): {
struct ipv6hdr *iph = ipv6_hdr(skb);
if (has_ports(iph->nexthdr))
@@ -147,7 +147,7 @@ static u32 flow_get_proto_dst(const struct sk_buff *skb)
u32 res = 0;
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP): {
+ case htons(ETH_P_IP): {
struct iphdr *iph = ip_hdr(skb);
if (!(iph->frag_off&htons(IP_MF|IP_OFFSET)) &&
@@ -155,7 +155,7 @@ static u32 flow_get_proto_dst(const struct sk_buff *skb)
res = ntohs(*(__be16 *)((void *)iph + iph->ihl * 4 + 2));
break;
}
- case __constant_htons(ETH_P_IPV6): {
+ case htons(ETH_P_IPV6): {
struct ipv6hdr *iph = ipv6_hdr(skb);
if (has_ports(iph->nexthdr))
@@ -213,9 +213,9 @@ static u32 flow_get_nfct(const struct sk_buff *skb)
static u32 flow_get_nfct_src(const struct sk_buff *skb)
{
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
return ntohl(CTTUPLE(skb, src.u3.ip));
- case __constant_htons(ETH_P_IPV6):
+ case htons(ETH_P_IPV6):
return ntohl(CTTUPLE(skb, src.u3.ip6[3]));
}
fallback:
@@ -225,9 +225,9 @@ fallback:
static u32 flow_get_nfct_dst(const struct sk_buff *skb)
{
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
return ntohl(CTTUPLE(skb, dst.u3.ip));
- case __constant_htons(ETH_P_IPV6):
+ case htons(ETH_P_IPV6):
return ntohl(CTTUPLE(skb, dst.u3.ip6[3]));
}
fallback:
diff --git a/net/sched/sch_dsmark.c b/net/sched/sch_dsmark.c
index edd1298..ba43aab 100644
--- a/net/sched/sch_dsmark.c
+++ b/net/sched/sch_dsmark.c
@@ -202,7 +202,7 @@ static int dsmark_enqueue(struct sk_buff *skb, struct Qdisc *sch)
if (p->set_tc_index) {
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
if (skb_cow_head(skb, sizeof(struct iphdr)))
goto drop;
@@ -210,7 +210,7 @@ static int dsmark_enqueue(struct sk_buff *skb, struct Qdisc *sch)
& ~INET_ECN_MASK;
break;
- case __constant_htons(ETH_P_IPV6):
+ case htons(ETH_P_IPV6):
if (skb_cow_head(skb, sizeof(struct ipv6hdr)))
goto drop;
@@ -289,11 +289,11 @@ static struct sk_buff *dsmark_dequeue(struct Qdisc *sch)
pr_debug("index %d->%d\n", skb->tc_index, index);
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
ipv4_change_dsfield(ip_hdr(skb), p->mask[index],
p->value[index]);
break;
- case __constant_htons(ETH_P_IPV6):
+ case htons(ETH_P_IPV6):
ipv6_change_dsfield(ipv6_hdr(skb), p->mask[index],
p->value[index]);
break;
diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index 6e041d1..fe1508e 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -119,7 +119,7 @@ static unsigned sfq_hash(struct sfq_sched_data *q, struct sk_buff *skb)
u32 h, h2;
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
{
const struct iphdr *iph = ip_hdr(skb);
h = iph->daddr;
@@ -134,7 +134,7 @@ static unsigned sfq_hash(struct sfq_sched_data *q, struct sk_buff *skb)
h2 ^= *(((u32*)iph) + iph->ihl);
break;
}
- case __constant_htons(ETH_P_IPV6):
+ case htons(ETH_P_IPV6):
{
struct ipv6hdr *iph = ipv6_hdr(skb);
h = iph->daddr.s6_addr32[3];
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index e55427f..5c1954d 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -769,7 +769,7 @@ repost:
/* check for expected message types */
/* The order of some of these tests is important. */
switch (headerp->rm_type) {
- case __constant_htonl(RDMA_MSG):
+ case htonl(RDMA_MSG):
/* never expect read chunks */
/* never expect reply chunks (two ways to check) */
/* never expect write chunks without having offered RDMA */
@@ -802,7 +802,7 @@ repost:
rpcrdma_inline_fixup(rqst, (char *)iptr, rep->rr_len);
break;
- case __constant_htonl(RDMA_NOMSG):
+ case htonl(RDMA_NOMSG):
/* never expect read or write chunks, always reply chunks */
if (headerp->rm_body.rm_chunks[0] != xdr_zero ||
headerp->rm_body.rm_chunks[1] != xdr_zero ||
--
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