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authorFlorian Westphal <fw@strlen.de>2015-04-02 14:31:43 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2015-04-08 16:49:10 +0200
commit383307838d41935841ba6b2e939b968326e2dea1 (patch)
tree85a4d1735e895f9549e63a06209b893097ab686c /net/bridge
parenta99074ae1f5cce08c769542440391981899ac04c (diff)
downloadlinux-383307838d41935841ba6b2e939b968326e2dea1.tar.bz2
netfilter: bridge: add and use nf_bridge_info_get helper
Don't access skb->nf_bridge directly, this pointer will be removed soon. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/bridge')
-rw-r--r--net/bridge/br_netfilter.c24
1 files changed, 16 insertions, 8 deletions
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index ca1cb6704a78..301f12b0a7cd 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -124,6 +124,11 @@ struct brnf_frag_data {
static DEFINE_PER_CPU(struct brnf_frag_data, brnf_frag_data_storage);
#endif
+static struct nf_bridge_info *nf_bridge_info_get(const struct sk_buff *skb)
+{
+ return skb->nf_bridge;
+}
+
static inline struct rtable *bridge_parent_rtable(const struct net_device *dev)
{
struct net_bridge_port *port;
@@ -268,7 +273,7 @@ static void nf_bridge_update_protocol(struct sk_buff *skb)
* bridge PRE_ROUTING hook. */
static int br_nf_pre_routing_finish_ipv6(struct sk_buff *skb)
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct rtable *rt;
if (nf_bridge->mask & BRNF_PKT_TYPE) {
@@ -300,7 +305,6 @@ static int br_nf_pre_routing_finish_ipv6(struct sk_buff *skb)
*/
static int br_nf_pre_routing_finish_bridge(struct sk_buff *skb)
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
struct neighbour *neigh;
struct dst_entry *dst;
@@ -310,6 +314,7 @@ static int br_nf_pre_routing_finish_bridge(struct sk_buff *skb)
dst = skb_dst(skb);
neigh = dst_neigh_lookup_skb(dst, skb);
if (neigh) {
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
int ret;
if (neigh->hh.hh_len) {
@@ -396,7 +401,7 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
struct iphdr *iph = ip_hdr(skb);
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct rtable *rt;
int err;
int frag_max_size;
@@ -488,7 +493,7 @@ static struct net_device *brnf_get_logical_dev(struct sk_buff *skb, const struct
/* Some common code for IPv4/IPv6 */
static struct net_device *setup_pre_routing(struct sk_buff *skb)
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
if (skb->pkt_type == PACKET_OTHERHOST) {
skb->pkt_type = PACKET_HOST;
@@ -687,7 +692,7 @@ static unsigned int br_nf_local_in(const struct nf_hook_ops *ops,
/* PF_BRIDGE/FORWARD *************************************************/
static int br_nf_forward_finish(struct sk_buff *skb)
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct net_device *in;
if (!IS_ARP(skb) && !IS_VLAN_ARP(skb)) {
@@ -738,6 +743,10 @@ static unsigned int br_nf_forward_ip(const struct nf_hook_ops *ops,
if (!nf_bridge_unshare(skb))
return NF_DROP;
+ nf_bridge = nf_bridge_info_get(skb);
+ if (!nf_bridge)
+ return NF_DROP;
+
parent = bridge_parent(out);
if (!parent)
return NF_DROP;
@@ -751,7 +760,6 @@ static unsigned int br_nf_forward_ip(const struct nf_hook_ops *ops,
nf_bridge_pull_encap_header(skb);
- nf_bridge = skb->nf_bridge;
if (skb->pkt_type == PACKET_OTHERHOST) {
skb->pkt_type = PACKET_HOST;
nf_bridge->mask |= BRNF_PKT_TYPE;
@@ -886,7 +894,7 @@ static unsigned int br_nf_post_routing(const struct nf_hook_ops *ops,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct net_device *realoutdev = bridge_parent(skb->dev);
u_int8_t pf;
@@ -955,7 +963,7 @@ static unsigned int ip_sabotage_in(const struct nf_hook_ops *ops,
*/
static void br_nf_pre_routing_finish_bridge_slow(struct sk_buff *skb)
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
skb_pull(skb, ETH_HLEN);
nf_bridge->mask &= ~BRNF_BRIDGED_DNAT;