net/ipv6: Remove rt6i_prefsrc

After the conversion to fib6_info, rt6i_prefsrc has a single user that
reads the value and otherwise it is only set. The one reader can be
converted to use rt->from so rt6i_prefsrc can be removed, reducing
rt6_info by another 20 bytes.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index 3f3af5e..6b3ea50 100644 (file)
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -784,7 +784,7 @@ cxgbi_check_route6(struct sockaddr *dst_addr, int ifindex)
        csk->mtu = mtu;
        csk->dst = dst;
 
-       if (ipv6_addr_any(&rt->rt6i_prefsrc.addr)) {
+       if (!rt->from || ipv6_addr_any(&rt->from->fib6_prefsrc.addr)) {
                struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt);
 
                err = ipv6_dev_get_saddr(&init_net, idev ? idev->dev : NULL,
@@ -795,7 +795,7 @@ cxgbi_check_route6(struct sockaddr *dst_addr, int ifindex)
                        goto rel_rt;
                }
        } else {
-               pref_saddr = rt->rt6i_prefsrc.addr;
+               pref_saddr = rt->from->fib6_prefsrc.addr;
        }
 
        csk->csk_family = AF_INET6;

diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 3d49305..c749666 100644 (file)
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -182,7 +182,6 @@ struct rt6_info {
        struct in6_addr                 rt6i_gateway;
        struct inet6_dev                *rt6i_idev;
        u32                             rt6i_flags;
-       struct rt6key                   rt6i_prefsrc;
 
        struct list_head                rt6i_uncached;
        struct uncached_list            *rt6i_uncached_list;

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 0fa62ac..b3268ea 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -995,7 +995,6 @@ static void ip6_rt_copy_init(struct rt6_info *rt, struct fib6_info *ort)
 #ifdef CONFIG_IPV6_SUBTREES
        rt->rt6i_src = ort->fib6_src;
 #endif
-       rt->rt6i_prefsrc = ort->fib6_prefsrc;
 }
 
 static struct fib6_node* fib6_backtrack(struct fib6_node *fn,
@@ -1449,11 +1448,6 @@ static int rt6_insert_exception(struct rt6_info *nrt,
        if (ort->fib6_src.plen)
                src_key = &nrt->rt6i_src.addr;
 #endif
-
-       /* Update rt6i_prefsrc as it could be changed
-        * in rt6_remove_prefsrc()
-        */
-       nrt->rt6i_prefsrc = ort->fib6_prefsrc;
        /* rt6_mtu_change() might lower mtu on ort.
         * Only insert this exception route if its mtu
         * is less than ort's mtu value.
@@ -1635,25 +1629,6 @@ static void rt6_update_exception_stamp_rt(struct rt6_info *rt)
        rcu_read_unlock();
 }
 
-static void rt6_exceptions_remove_prefsrc(struct fib6_info *rt)
-{
-       struct rt6_exception_bucket *bucket;
-       struct rt6_exception *rt6_ex;
-       int i;
-
-       bucket = rcu_dereference_protected(rt->rt6i_exception_bucket,
-                                       lockdep_is_held(&rt6_exception_lock));
-
-       if (bucket) {
-               for (i = 0; i < FIB6_EXCEPTION_BUCKET_SIZE; i++) {
-                       hlist_for_each_entry(rt6_ex, &bucket->chain, hlist) {
-                               rt6_ex->rt6i->rt6i_prefsrc.plen = 0;
-                       }
-                       bucket++;
-               }
-       }
-}
-
 static bool rt6_mtu_change_route_allowed(struct inet6_dev *idev,
                                         struct rt6_info *rt, int mtu)
 {
@@ -3793,8 +3768,6 @@ static int fib6_remove_prefsrc(struct fib6_info *rt, void *arg)
                spin_lock_bh(&rt6_exception_lock);
                /* remove prefsrc entry */
                rt->fib6_prefsrc.plen = 0;
-               /* need to update cache as well */
-               rt6_exceptions_remove_prefsrc(rt);
                spin_unlock_bh(&rt6_exception_lock);
        }
        return 0;