diff options
author | Wei Wang <weiwan@google.com> | 2017-06-17 10:42:42 -0700 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2017-06-17 22:54:01 -0400 |
commit | a4c2fd7f78915a0d7c5275e7612e7793157a01f2 (patch) | |
tree | 67797baa578f3492c80ef57a9eaf0d31040833f5 /net/ipv4 | |
parent | b2a9c0ed75a32e788d034a58a18f2fc46396e412 (diff) |
net: remove DST_NOCACHE flag
DST_NOCACHE flag check has been removed from dst_release() and
dst_hold_safe() in a previous patch because all the dst are now ref
counted properly and can be released based on refcnt only.
Looking at the rest of the DST_NOCACHE use, all of them can now be
removed or replaced with other checks.
So this patch gets rid of all the DST_NOCACHE usage and remove this flag
completely.
Signed-off-by: Wei Wang <weiwan@google.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r-- | net/ipv4/route.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 9a0f496f8bf4..c816cd53f7fc 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1299,7 +1299,7 @@ static struct fib_nh_exception *find_exception(struct fib_nh *nh, __be32 daddr) } static bool rt_bind_exception(struct rtable *rt, struct fib_nh_exception *fnhe, - __be32 daddr) + __be32 daddr, const bool do_cache) { bool ret = false; @@ -1328,7 +1328,7 @@ static bool rt_bind_exception(struct rtable *rt, struct fib_nh_exception *fnhe, if (!rt->rt_gateway) rt->rt_gateway = daddr; - if (!(rt->dst.flags & DST_NOCACHE)) { + if (do_cache) { dst_hold(&rt->dst); rcu_assign_pointer(*porig, rt); if (orig) { @@ -1441,7 +1441,8 @@ static bool rt_cache_valid(const struct rtable *rt) static void rt_set_nexthop(struct rtable *rt, __be32 daddr, const struct fib_result *res, struct fib_nh_exception *fnhe, - struct fib_info *fi, u16 type, u32 itag) + struct fib_info *fi, u16 type, u32 itag, + const bool do_cache) { bool cached = false; @@ -1462,8 +1463,8 @@ static void rt_set_nexthop(struct rtable *rt, __be32 daddr, #endif rt->dst.lwtstate = lwtstate_get(nh->nh_lwtstate); if (unlikely(fnhe)) - cached = rt_bind_exception(rt, fnhe, daddr); - else if (!(rt->dst.flags & DST_NOCACHE)) + cached = rt_bind_exception(rt, fnhe, daddr, do_cache); + else if (do_cache) cached = rt_cache_route(nh, rt); if (unlikely(!cached)) { /* Routes we intend to cache in nexthop exception or @@ -1471,7 +1472,6 @@ static void rt_set_nexthop(struct rtable *rt, __be32 daddr, * However, if we are unsuccessful at storing this * route into the cache we really need to set it. */ - rt->dst.flags |= DST_NOCACHE; if (!rt->rt_gateway) rt->rt_gateway = daddr; rt_add_uncached_list(rt); @@ -1494,7 +1494,7 @@ struct rtable *rt_dst_alloc(struct net_device *dev, struct rtable *rt; rt = dst_alloc(&ipv4_dst_ops, dev, 1, DST_OBSOLETE_FORCE_CHK, - (will_cache ? 0 : (DST_HOST | DST_NOCACHE)) | + (will_cache ? 0 : DST_HOST) | (nopolicy ? DST_NOPOLICY : 0) | (noxfrm ? DST_NOXFRM : 0)); @@ -1738,7 +1738,8 @@ rt_cache: rth->dst.input = ip_forward; - rt_set_nexthop(rth, daddr, res, fnhe, res->fi, res->type, itag); + rt_set_nexthop(rth, daddr, res, fnhe, res->fi, res->type, itag, + do_cache); set_lwt_redirect(rth); skb_dst_set(skb, &rth->dst); out: @@ -2026,10 +2027,8 @@ local_input: rth->dst.input = lwtunnel_input; } - if (unlikely(!rt_cache_route(nh, rth))) { - rth->dst.flags |= DST_NOCACHE; + if (unlikely(!rt_cache_route(nh, rth))) rt_add_uncached_list(rth); - } } skb_dst_set(skb, &rth->dst); err = 0; @@ -2260,7 +2259,7 @@ add: #endif } - rt_set_nexthop(rth, fl4->daddr, res, fnhe, fi, type, 0); + rt_set_nexthop(rth, fl4->daddr, res, fnhe, fi, type, 0, do_cache); set_lwt_redirect(rth); return rth; |