inetpeer: Introduce inet_peer_address_t.

Currently only the v4 aspect is used, but this will change.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/inetpeer.h b/include/net/inetpeer.h
index fe239bf..d7e6079 100644 (file)
--- a/include/net/inetpeer.h
+++ b/include/net/inetpeer.h
@@ -13,10 +13,18 @@
 #include <linux/spinlock.h>
 #include <asm/atomic.h>
 
+typedef struct {
+       union {
+               __be32          a4;
+               __be32          a6[4];
+       };
+       __u16   family;
+} inet_peer_address_t;
+
 struct inet_peer {
        /* group together avl_left,avl_right,v4daddr to speedup lookups */
        struct inet_peer __rcu  *avl_left, *avl_right;
-       __be32                  v4daddr;        /* peer's address */
+       inet_peer_address_t     daddr;
        __u32                   avl_height;
        struct list_head        unused;
        __u32                   dtime;          /* the time of last use of not

diff --git a/net/ipv4/inetpeer.c b/net/ipv4/inetpeer.c
index f944008..893f998 100644 (file)
--- a/net/ipv4/inetpeer.c
+++ b/net/ipv4/inetpeer.c
@@ -63,7 +63,7 @@
  *             refcnt: atomically against modifications on other CPU;
  *                usually under some other lock to prevent node disappearing
  *             dtime: unused node list lock
- *             v4daddr: unchangeable
+ *             daddr: unchangeable
  *             ip_id_count: atomic value (no lock needed)
  */
 
@@ -165,9 +165,9 @@ static void unlink_from_unused(struct inet_peer *p)
        for (u = rcu_dereference_protected(_base->root,         \
                        lockdep_is_held(&_base->lock));         \
             u != peer_avl_empty; ) {                           \
-               if (_daddr == u->v4daddr)                       \
+               if (_daddr == u->daddr.a4)                      \
                        break;                                  \
-               if ((__force __u32)_daddr < (__force __u32)u->v4daddr)  \
+               if ((__force __u32)_daddr < (__force __u32)u->daddr.a4) \
                        v = &u->avl_left;                       \
                else                                            \
                        v = &u->avl_right;                      \
@@ -191,7 +191,7 @@ static struct inet_peer *lookup_rcu_bh(__be32 daddr, struct inet_peer_base *base
        int count = 0;
 
        while (u != peer_avl_empty) {
-               if (daddr == u->v4daddr) {
+               if (daddr == u->daddr.a4) {
                        /* Before taking a reference, check if this entry was
                         * deleted, unlink_from_pool() sets refcnt=-1 to make
                         * distinction between an unused entry (refcnt=0) and
@@ -201,7 +201,7 @@ static struct inet_peer *lookup_rcu_bh(__be32 daddr, struct inet_peer_base *base
                                u = NULL;
                        return u;
                }
-               if ((__force __u32)daddr < (__force __u32)u->v4daddr)
+               if ((__force __u32)daddr < (__force __u32)u->daddr.a4)
                        u = rcu_dereference_bh(u->avl_left);
                else
                        u = rcu_dereference_bh(u->avl_right);
@@ -354,7 +354,7 @@ static void unlink_from_pool(struct inet_peer *p, struct inet_peer_base *base)
        if (atomic_cmpxchg(&p->refcnt, 1, -1) == 1) {
                struct inet_peer __rcu **stack[PEER_MAXDEPTH];
                struct inet_peer __rcu ***stackptr, ***delp;
-               if (lookup(p->v4daddr, stack, base) != p)
+               if (lookup(p->daddr.a4, stack, base) != p)
                        BUG();
                delp = stackptr - 1; /* *delp[0] == p */
                if (p->avl_left == peer_avl_empty_rcu) {
@@ -367,7 +367,7 @@ static void unlink_from_pool(struct inet_peer *p, struct inet_peer_base *base)
                        BUG_ON(rcu_dereference_protected(*stackptr[-1],
                                        lockdep_is_held(&base->lock)) != t);
                        **--stackptr = t->avl_left;
-                       /* t is removed, t->v4daddr > x->v4daddr for any
+                       /* t is removed, t->daddr > x->daddr for any
                         * x in p->avl_left subtree.
                         * Put t in the old place of p. */
                        RCU_INIT_POINTER(*delp[0], t);
@@ -479,7 +479,7 @@ struct inet_peer *inet_getpeer(__be32 daddr, int create)
        }
        p = create ? kmem_cache_alloc(peer_cachep, GFP_ATOMIC) : NULL;
        if (p) {
-               p->v4daddr = daddr;
+               p->daddr.a4 = daddr;
                atomic_set(&p->refcnt, 1);
                atomic_set(&p->rid, 0);
                atomic_set(&p->ip_id_count, secure_ip_id(daddr));

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 69ccbc1..b8bbf89 100644 (file)
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1347,7 +1347,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
                    tcp_death_row.sysctl_tw_recycle &&
                    (dst = inet_csk_route_req(sk, req)) != NULL &&
                    (peer = rt_get_peer((struct rtable *)dst)) != NULL &&
-                   peer->v4daddr == saddr) {
+                   peer->daddr.a4 == saddr) {
                        inet_peer_refcheck(peer);
                        if ((u32)get_seconds() - peer->tcp_ts_stamp < TCP_PAWS_MSL &&
                            (s32)(peer->tcp_ts - req->ts_recent) >