From 5744dd9b71c6b9df944c6a32a000d4a564a2abd7 Mon Sep 17 00:00:00 2001 From: Li RongQing Date: Tue, 11 Sep 2012 21:59:01 +0000 Subject: [PATCH] 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 Signed-off-by: Li RongQing Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 4 ++-- net/ipv6/route.c | 8 ++++---- 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; }