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Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

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Pablo Neira Ayuso says:

====================
Netfilter fixes for net-next

The following batch contains a couple of fixes to address some fallout
from the previous pull request, they are:

1) Address link problems in the bridge code after e5de75b. Fix it by
   using rcu hook to address to avoid ifdef pollution and hard
   dependency between bridge and br_netfilter.

2) Address sparse warnings in the netfilter reject code, patch from
   Florian Westphal.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2015-03-10 12:48:47 -04:00
commit 515fb5c317
8 changed files with 23 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
include/net/netfilter/ipv4/nf_reject.h
View file

@ -12,7 +12,7 @@ const struct tcphdr *nf_reject_ip_tcphdr_get(struct sk_buff *oldskb,
struct tcphdr *_oth, int hook);
struct iphdr *nf_reject_iphdr_put(struct sk_buff *nskb,
const struct sk_buff *oldskb,
__be16 protocol, int ttl);
__u8 protocol, int ttl);
void nf_reject_ip_tcphdr_put(struct sk_buff *nskb, const struct sk_buff *oldskb,
const struct tcphdr *oth);

2
include/net/netfilter/ipv6/nf_reject.h
View file

@ -13,7 +13,7 @@ const struct tcphdr *nf_reject_ip6_tcphdr_get(struct sk_buff *oldskb,
unsigned int *otcplen, int hook);
struct ipv6hdr *nf_reject_ip6hdr_put(struct sk_buff *nskb,
const struct sk_buff *oldskb,
__be16 protocol, int hoplimit);
__u8 protocol, int hoplimit);
void nf_reject_ip6_tcphdr_put(struct sk_buff *nskb,
const struct sk_buff *oldskb,
const struct tcphdr *oth, unsigned int otcplen);

7
net/bridge/br_device.c
View file

@ -25,6 +25,9 @@
#define COMMON_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | \
NETIF_F_GSO_MASK | NETIF_F_HW_CSUM)
const struct nf_br_ops __rcu *nf_br_ops __read_mostly;
EXPORT_SYMBOL_GPL(nf_br_ops);
/* net device transmit always called with BH disabled */
netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{
@ -33,10 +36,12 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
struct net_bridge_fdb_entry *dst;
struct net_bridge_mdb_entry *mdst;
struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats);
const struct nf_br_ops *nf_ops;
u16 vid = 0;
rcu_read_lock();
if (br_nf_prerouting_finish_bridge(skb)) {
nf_ops = rcu_dereference(nf_br_ops);
if (nf_ops && nf_ops->br_dev_xmit_hook(skb)) {
rcu_read_unlock();
return NETDEV_TX_OK;
}

9
net/bridge/br_netfilter.c
View file

@ -914,7 +914,7 @@ static void br_nf_pre_routing_finish_bridge_slow(struct sk_buff *skb)
br_handle_frame_finish(skb);
}
int br_nf_prerouting_finish_bridge(struct sk_buff *skb)
static int br_nf_dev_xmit(struct sk_buff *skb)
{
if (skb->nf_bridge && (skb->nf_bridge->mask & BRNF_BRIDGED_DNAT)) {
br_nf_pre_routing_finish_bridge_slow(skb);
@ -922,7 +922,10 @@ int br_nf_prerouting_finish_bridge(struct sk_buff *skb)
}
return 0;
}
EXPORT_SYMBOL_GPL(br_nf_prerouting_finish_bridge);
static const struct nf_br_ops br_ops = {
.br_dev_xmit_hook = br_nf_dev_xmit,
};
void br_netfilter_enable(void)
{
@ -1061,12 +1064,14 @@ static int __init br_netfilter_init(void)
return -ENOMEM;
}
#endif
RCU_INIT_POINTER(nf_br_ops, &br_ops);
printk(KERN_NOTICE "Bridge firewalling registered\n");
return 0;
}
static void __exit br_netfilter_fini(void)
{
RCU_INIT_POINTER(nf_br_ops, NULL);
nf_unregister_hooks(br_nf_ops, ARRAY_SIZE(br_nf_ops));
#ifdef CONFIG_SYSCTL
unregister_net_sysctl_table(brnf_sysctl_header);

10
net/bridge/br_private.h
View file

@ -763,17 +763,17 @@ static inline int br_vlan_enabled(struct net_bridge *br)
}
#endif
struct nf_br_ops {
int (*br_dev_xmit_hook)(struct sk_buff *skb);
};
extern const struct nf_br_ops __rcu *nf_br_ops;
/* br_netfilter.c */
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
int br_nf_prerouting_finish_bridge(struct sk_buff *skb);
int br_nf_core_init(void);
void br_nf_core_fini(void);
void br_netfilter_rtable_init(struct net_bridge *);
#else
static inline int br_nf_prerouting_finish_bridge(struct sk_buff *skb)
{
return 0;
}
static inline int br_nf_core_init(void) { return 0; }
static inline void br_nf_core_fini(void) {}
#define br_netfilter_rtable_init(x)

2
net/bridge/netfilter/nft_reject_bridge.c
View file

@ -99,7 +99,7 @@ static void nft_reject_br_send_v4_unreach(struct sk_buff *oldskb,
if (!pskb_may_pull(oldskb, len))
return;
if (pskb_trim_rcsum(oldskb, htons(ip_hdr(oldskb)->tot_len)))
if (pskb_trim_rcsum(oldskb, ntohs(ip_hdr(oldskb)->tot_len)))
return;
if (ip_hdr(oldskb)->protocol == IPPROTO_TCP ||

2
net/ipv4/netfilter/nf_reject_ipv4.c
View file

@ -43,7 +43,7 @@ EXPORT_SYMBOL_GPL(nf_reject_ip_tcphdr_get);
struct iphdr *nf_reject_iphdr_put(struct sk_buff *nskb,
const struct sk_buff *oldskb,
__be16 protocol, int ttl)
__u8 protocol, int ttl)
{
struct iphdr *niph, *oiph = ip_hdr(oldskb);

2
net/ipv6/netfilter/nf_reject_ipv6.c
View file

@ -65,7 +65,7 @@ EXPORT_SYMBOL_GPL(nf_reject_ip6_tcphdr_get);
struct ipv6hdr *nf_reject_ip6hdr_put(struct sk_buff *nskb,
const struct sk_buff *oldskb,
__be16 protocol, int hoplimit)
__u8 protocol, int hoplimit)
{
struct ipv6hdr *ip6h;
const struct ipv6hdr *oip6h = ipv6_hdr(oldskb);