[IPV4]: encapsulation annotations

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/if_tunnel.h b/include/linux/if_tunnel.h
index bef9f8f..8de079b 100644 (file)
--- a/include/linux/if_tunnel.h
+++ b/include/linux/if_tunnel.h
@@ -19,10 +19,10 @@ struct ip_tunnel_parm
 {
        char                    name[IFNAMSIZ];
        int                     link;
-       __u16                   i_flags;
-       __u16                   o_flags;
-       __u32                   i_key;
-       __u32                   o_key;
+       __be16                  i_flags;
+       __be16                  o_flags;
+       __be32                  i_key;
+       __be32                  o_key;
        struct iphdr            iph;
 };
 

diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index 8ae7f74..7907c42 100644 (file)
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -211,8 +211,8 @@ struct xfrm_user_tmpl {
 
 struct xfrm_encap_tmpl {
        __u16           encap_type;
-       __u16           encap_sport;
-       __u16           encap_dport;
+       __be16          encap_sport;
+       __be16          encap_dport;
        xfrm_address_t  encap_oa;
 };
 

diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 9954297..67a5509 100644 (file)
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -14,7 +14,7 @@
  * into IP header for icv calculation. Options are already checked
  * for validity, so paranoia is not required. */
 
-static int ip_clear_mutable_options(struct iphdr *iph, u32 *daddr)
+static int ip_clear_mutable_options(struct iphdr *iph, __be32 *daddr)
 {
        unsigned char * optptr = (unsigned char*)(iph+1);
        int  l = iph->ihl*4 - sizeof(struct iphdr);
@@ -162,7 +162,7 @@ static int ah_input(struct xfrm_state *x, struct sk_buff *skb)
        iph->frag_off = 0;
        iph->check = 0;
        if (ihl > sizeof(*iph)) {
-               u32 dummy;
+               __be32 dummy;
                if (ip_clear_mutable_options(iph, &dummy))
                        goto out;
        }

diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index b5c205b..f2c6776 100644 (file)
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -67,7 +67,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
        if (x->encap) {
                struct xfrm_encap_tmpl *encap = x->encap;
                struct udphdr *uh;
-               u32 *udpdata32;
+               __be32 *udpdata32;
 
                uh = (struct udphdr *)esph;
                uh->source = encap->encap_sport;
@@ -81,7 +81,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
                        esph = (struct ip_esp_hdr *)(uh + 1);
                        break;
                case UDP_ENCAP_ESPINUDP_NON_IKE:
-                       udpdata32 = (u32 *)(uh + 1);
+                       udpdata32 = (__be32 *)(uh + 1);
                        udpdata32[0] = udpdata32[1] = 0;
                        esph = (struct ip_esp_hdr *)(udpdata32 + 2);
                        break;

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index d5b5dec..2522114 100644 (file)
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -144,7 +144,7 @@ static struct net_device *ipgre_fb_tunnel_dev;
  */
 
 #define HASH_SIZE  16
-#define HASH(addr) ((addr^(addr>>4))&0xF)
+#define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF)
 
 static struct ip_tunnel *tunnels[4][HASH_SIZE];
 
@@ -157,7 +157,7 @@ static DEFINE_RWLOCK(ipgre_lock);
 
 /* Given src, dst and key, find appropriate for input tunnel. */
 
-static struct ip_tunnel * ipgre_tunnel_lookup(u32 remote, u32 local, u32 key)
+static struct ip_tunnel * ipgre_tunnel_lookup(__be32 remote, __be32 local, __be32 key)
 {
        unsigned h0 = HASH(remote);
        unsigned h1 = HASH(key);
@@ -194,9 +194,9 @@ static struct ip_tunnel * ipgre_tunnel_lookup(u32 remote, u32 local, u32 key)
 
 static struct ip_tunnel **ipgre_bucket(struct ip_tunnel *t)
 {
-       u32 remote = t->parms.iph.daddr;
-       u32 local = t->parms.iph.saddr;
-       u32 key = t->parms.i_key;
+       __be32 remote = t->parms.iph.daddr;
+       __be32 local = t->parms.iph.saddr;
+       __be32 key = t->parms.i_key;
        unsigned h = HASH(key);
        int prio = 0;
 
@@ -236,9 +236,9 @@ static void ipgre_tunnel_unlink(struct ip_tunnel *t)
 
 static struct ip_tunnel * ipgre_tunnel_locate(struct ip_tunnel_parm *parms, int create)
 {
-       u32 remote = parms->iph.daddr;
-       u32 local = parms->iph.saddr;
-       u32 key = parms->i_key;
+       __be32 remote = parms->iph.daddr;
+       __be32 local = parms->iph.saddr;
+       __be32 key = parms->i_key;
        struct ip_tunnel *t, **tp, *nt;
        struct net_device *dev;
        unsigned h = HASH(key);
@@ -319,12 +319,12 @@ static void ipgre_err(struct sk_buff *skb, u32 info)
  */
 
        struct iphdr *iph = (struct iphdr*)skb->data;
-       u16          *p = (u16*)(skb->data+(iph->ihl<<2));
+       __be16       *p = (__be16*)(skb->data+(iph->ihl<<2));
        int grehlen = (iph->ihl<<2) + 4;
        int type = skb->h.icmph->type;
        int code = skb->h.icmph->code;
        struct ip_tunnel *t;
-       u16 flags;
+       __be16 flags;
 
        flags = p[0];
        if (flags&(GRE_CSUM|GRE_KEY|GRE_SEQ|GRE_ROUTING|GRE_VERSION)) {
@@ -370,7 +370,7 @@ static void ipgre_err(struct sk_buff *skb, u32 info)
        }
 
        read_lock(&ipgre_lock);
-       t = ipgre_tunnel_lookup(iph->daddr, iph->saddr, (flags&GRE_KEY) ? *(((u32*)p) + (grehlen>>2) - 1) : 0);
+       t = ipgre_tunnel_lookup(iph->daddr, iph->saddr, (flags&GRE_KEY) ? *(((__be32*)p) + (grehlen>>2) - 1) : 0);
        if (t == NULL || t->parms.iph.daddr == 0 || MULTICAST(t->parms.iph.daddr))
                goto out;
 
@@ -388,14 +388,14 @@ out:
 #else
        struct iphdr *iph = (struct iphdr*)dp;
        struct iphdr *eiph;
-       u16          *p = (u16*)(dp+(iph->ihl<<2));
+       __be16       *p = (__be16*)(dp+(iph->ihl<<2));
        int type = skb->h.icmph->type;
        int code = skb->h.icmph->code;
        int rel_type = 0;
        int rel_code = 0;
        __be32 rel_info = 0;
        __u32 n = 0;
-       u16 flags;
+       __be16 flags;
        int grehlen = (iph->ihl<<2) + 4;
        struct sk_buff *skb2;
        struct flowi fl;
@@ -556,9 +556,9 @@ static int ipgre_rcv(struct sk_buff *skb)
 {
        struct iphdr *iph;
        u8     *h;
-       u16    flags;
+       __be16    flags;
        u16    csum = 0;
-       u32    key = 0;
+       __be32 key = 0;
        u32    seqno = 0;
        struct ip_tunnel *tunnel;
        int    offset = 4;
@@ -568,7 +568,7 @@ static int ipgre_rcv(struct sk_buff *skb)
 
        iph = skb->nh.iph;
        h = skb->data;
-       flags = *(u16*)h;
+       flags = *(__be16*)h;
 
        if (flags&(GRE_CSUM|GRE_KEY|GRE_ROUTING|GRE_SEQ|GRE_VERSION)) {
                /* - Version must be 0.
@@ -592,11 +592,11 @@ static int ipgre_rcv(struct sk_buff *skb)
                        offset += 4;
                }
                if (flags&GRE_KEY) {
-                       key = *(u32*)(h + offset);
+                       key = *(__be32*)(h + offset);
                        offset += 4;
                }
                if (flags&GRE_SEQ) {
-                       seqno = ntohl(*(u32*)(h + offset));
+                       seqno = ntohl(*(__be32*)(h + offset));
                        offset += 4;
                }
        }
@@ -605,7 +605,7 @@ static int ipgre_rcv(struct sk_buff *skb)
        if ((tunnel = ipgre_tunnel_lookup(iph->saddr, iph->daddr, key)) != NULL) {
                secpath_reset(skb);
 
-               skb->protocol = *(u16*)(h + 2);
+               skb->protocol = *(__be16*)(h + 2);
                /* WCCP version 1 and 2 protocol decoding.
                 * - Change protocol to IP
                 * - When dealing with WCCPv2, Skip extra 4 bytes in GRE header
@@ -673,13 +673,13 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
        struct iphdr  *old_iph = skb->nh.iph;
        struct iphdr  *tiph;
        u8     tos;
-       u16    df;
+       __be16 df;
        struct rtable *rt;                      /* Route to the other host */
        struct net_device *tdev;                        /* Device to other host */
        struct iphdr  *iph;                     /* Our new IP header */
        int    max_headroom;                    /* The extra header space needed */
        int    gre_hlen;
-       u32    dst;
+       __be32 dst;
        int    mtu;
 
        if (tunnel->recursion++) {
@@ -860,11 +860,11 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
                        iph->ttl = dst_metric(&rt->u.dst, RTAX_HOPLIMIT);
        }
 
-       ((u16*)(iph+1))[0] = tunnel->parms.o_flags;
-       ((u16*)(iph+1))[1] = skb->protocol;
+       ((__be16*)(iph+1))[0] = tunnel->parms.o_flags;
+       ((__be16*)(iph+1))[1] = skb->protocol;
 
        if (tunnel->parms.o_flags&(GRE_KEY|GRE_CSUM|GRE_SEQ)) {
-               u32 *ptr = (u32*)(((u8*)iph) + tunnel->hlen - 4);
+               __be32 *ptr = (__be32*)(((u8*)iph) + tunnel->hlen - 4);
 
                if (tunnel->parms.o_flags&GRE_SEQ) {
                        ++tunnel->o_seqno;
@@ -877,7 +877,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
                }
                if (tunnel->parms.o_flags&GRE_CSUM) {
                        *ptr = 0;
-                       *(__u16*)ptr = ip_compute_csum((void*)(iph+1), skb->len - sizeof(struct iphdr));
+                       *(__be16*)ptr = ip_compute_csum((void*)(iph+1), skb->len - sizeof(struct iphdr));
                }
        }
 
@@ -1068,7 +1068,7 @@ static int ipgre_header(struct sk_buff *skb, struct net_device *dev, unsigned sh
 {
        struct ip_tunnel *t = netdev_priv(dev);
        struct iphdr *iph = (struct iphdr *)skb_push(skb, t->hlen);
-       u16 *p = (u16*)(iph+1);
+       __be16 *p = (__be16*)(iph+1);
 
        memcpy(iph, &t->parms.iph, sizeof(struct iphdr));
        p[0]            = t->parms.o_flags;

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 0c45565..9d719d6 100644 (file)
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -118,7 +118,7 @@
 #include <net/xfrm.h>
 
 #define HASH_SIZE  16
-#define HASH(addr) ((addr^(addr>>4))&0xF)
+#define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF)
 
 static int ipip_fb_tunnel_init(struct net_device *dev);
 static int ipip_tunnel_init(struct net_device *dev);
@@ -134,7 +134,7 @@ static struct ip_tunnel **tunnels[4] = { tunnels_wc, tunnels_l, tunnels_r, tunne
 
 static DEFINE_RWLOCK(ipip_lock);
 
-static struct ip_tunnel * ipip_tunnel_lookup(u32 remote, u32 local)
+static struct ip_tunnel * ipip_tunnel_lookup(__be32 remote, __be32 local)
 {
        unsigned h0 = HASH(remote);
        unsigned h1 = HASH(local);
@@ -160,8 +160,8 @@ static struct ip_tunnel * ipip_tunnel_lookup(u32 remote, u32 local)
 
 static struct ip_tunnel **ipip_bucket(struct ip_tunnel *t)
 {
-       u32 remote = t->parms.iph.daddr;
-       u32 local = t->parms.iph.saddr;
+       __be32 remote = t->parms.iph.daddr;
+       __be32 local = t->parms.iph.saddr;
        unsigned h = 0;
        int prio = 0;
 
@@ -203,8 +203,8 @@ static void ipip_tunnel_link(struct ip_tunnel *t)
 
 static struct ip_tunnel * ipip_tunnel_locate(struct ip_tunnel_parm *parms, int create)
 {
-       u32 remote = parms->iph.daddr;
-       u32 local = parms->iph.saddr;
+       __be32 remote = parms->iph.daddr;
+       __be32 local = parms->iph.saddr;
        struct ip_tunnel *t, **tp, *nt;
        struct net_device *dev;
        unsigned h = 0;
@@ -519,13 +519,13 @@ static int ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
        struct net_device_stats *stats = &tunnel->stat;
        struct iphdr  *tiph = &tunnel->parms.iph;
        u8     tos = tunnel->parms.iph.tos;
-       u16    df = tiph->frag_off;
+       __be16 df = tiph->frag_off;
        struct rtable *rt;                      /* Route to the other host */
        struct net_device *tdev;                        /* Device to other host */
        struct iphdr  *old_iph = skb->nh.iph;
        struct iphdr  *iph;                     /* Our new IP header */
        int    max_headroom;                    /* The extra header space needed */
-       u32    dst = tiph->daddr;
+       __be32 dst = tiph->daddr;
        int    mtu;
 
        if (tunnel->recursion++) {