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authorLi RongQing <roy.qing.li@gmail.com>2012-09-12 01:59:01 +0400
committerDavid S. Miller <davem@davemloft.net>2012-09-14 00:53:46 +0400
commit5744dd9b71c6b9df944c6a32a000d4a564a2abd7 (patch)
tree5d40eb61a4152f32fa15afdfded741648cfc28c7 /net/ipv6
parentfb0af4c74f200e3c4846d91d8f2f8b265450bba7 (diff)
downloadlinux-5744dd9b71c6b9df944c6a32a000d4a564a2abd7.tar.xz
ipv6: replace write lock with read lock when get route info
geting route info does not write rt->rt6i_table, so replace write lock with read lock Suggested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/addrconf.c4
-rw-r--r--net/ipv6/route.c8
2 files changed, 6 insertions, 6 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 5fd8ec895c8b..719a828fb67f 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1708,7 +1708,7 @@ static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
if (table == NULL)
return NULL;
- write_lock_bh(&table->tb6_lock);
+ read_lock_bh(&table->tb6_lock);
fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
if (!fn)
goto out;
@@ -1723,7 +1723,7 @@ static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
break;
}
out:
- write_unlock_bh(&table->tb6_lock);
+ read_unlock_bh(&table->tb6_lock);
return rt;
}
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index f568ac697987..83dafa528936 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1837,7 +1837,7 @@ static struct rt6_info *rt6_get_route_info(struct net *net,
if (!table)
return NULL;
- write_lock_bh(&table->tb6_lock);
+ read_lock_bh(&table->tb6_lock);
fn = fib6_locate(&table->tb6_root, prefix ,prefixlen, NULL, 0);
if (!fn)
goto out;
@@ -1853,7 +1853,7 @@ static struct rt6_info *rt6_get_route_info(struct net *net,
break;
}
out:
- write_unlock_bh(&table->tb6_lock);
+ read_unlock_bh(&table->tb6_lock);
return rt;
}
@@ -1896,7 +1896,7 @@ struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, struct net_dev
if (!table)
return NULL;
- write_lock_bh(&table->tb6_lock);
+ read_lock_bh(&table->tb6_lock);
for (rt = table->tb6_root.leaf; rt; rt=rt->dst.rt6_next) {
if (dev == rt->dst.dev &&
((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) &&
@@ -1905,7 +1905,7 @@ struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, struct net_dev
}
if (rt)
dst_hold(&rt->dst);
- write_unlock_bh(&table->tb6_lock);
+ read_unlock_bh(&table->tb6_lock);
return rt;
}