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Date: Tue, 17 Jul 2018 05:06:46 -0700
From: dsahern@...nel.org
To: netdev@...r.kernel.org
Cc: nikita.leshchenko@...cle.com, roopa@...ulusnetworks.com,
stephen@...workplumber.org, idosch@...lanox.com, jiri@...lanox.com,
saeedm@...lanox.com, alex.aring@...il.com,
linux-wpan@...r.kernel.org, netfilter-devel@...r.kernel.org,
linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>
Subject: [PATCH RFC/RFT net-next 12/17] net/neigh: Change neigh_xmit to take an address family
From: David Ahern <dsahern@...il.com>
The NEIGH_*_TABLE enum is really related to *how* the tables are
stored (in an array), a detail that does not need to leave the
neighbor code. Change the neigh_xmit API to take a proper address
family.
Signed-off-by: David Ahern <dsahern@...il.com>
---
include/net/neighbour.h | 2 +-
net/core/neighbour.c | 10 +++++-----
net/mpls/af_mpls.c | 33 ++++++++++++---------------------
net/mpls/mpls_iptunnel.c | 6 ++----
net/netfilter/nf_flow_table_ip.c | 4 ++--
net/netfilter/nft_fwd_netdev.c | 6 +++---
6 files changed, 25 insertions(+), 36 deletions(-)
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index b70afea05f86..e968db1b7742 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -365,7 +365,7 @@ void neigh_for_each(struct neigh_table *tbl,
void (*cb)(struct neighbour *, void *), void *cookie);
void __neigh_for_each_release(struct neigh_table *tbl,
int (*cb)(struct neighbour *));
-int neigh_xmit(int fam, struct net_device *, const void *, struct sk_buff *);
+int neigh_xmit(u8 fam, struct net_device *, const void *, struct sk_buff *);
void pneigh_for_each(struct neigh_table *tbl,
void (*cb)(struct pneigh_entry *));
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 8bdaeb080ce4..b60087d7c0bc 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -2548,15 +2548,16 @@ void __neigh_for_each_release(struct neigh_table *tbl,
}
EXPORT_SYMBOL(__neigh_for_each_release);
-int neigh_xmit(int index, struct net_device *dev,
+int neigh_xmit(u8 family, struct net_device *dev,
const void *addr, struct sk_buff *skb)
{
int err = -EAFNOSUPPORT;
- if (likely(index < NEIGH_NR_TABLES)) {
+
+ if (likely(family != AF_UNSPEC)) {
struct neigh_table *tbl;
struct neighbour *neigh;
- tbl = neigh_tables[index];
+ tbl = neigh_find_table(dev_net(dev), family);
if (!tbl)
goto out;
rcu_read_lock_bh();
@@ -2570,8 +2571,7 @@ int neigh_xmit(int index, struct net_device *dev,
}
err = neigh->output(neigh, skb);
rcu_read_unlock_bh();
- }
- else if (index == NEIGH_LINK_TABLE) {
+ } else {
err = dev_hard_header(skb, dev, ntohs(skb->protocol),
addr, NULL, skb->len);
if (err < 0)
diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index 7a4de6d618b1..a701dc055de2 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -34,7 +34,7 @@
*/
#define MAX_MP_SELECT_LABELS 4
-#define MPLS_NEIGH_TABLE_UNSPEC (NEIGH_LINK_TABLE + 1)
+#define MPLS_NEIGH_TABLE_UNSPEC AF_UNSPEC
static int zero = 0;
static int one = 1;
@@ -453,7 +453,7 @@ static int mpls_forward(struct sk_buff *skb, struct net_device *dev,
/* If via wasn't specified then send out using device address */
if (nh->nh_via_table == MPLS_NEIGH_TABLE_UNSPEC)
- err = neigh_xmit(NEIGH_LINK_TABLE, out_dev,
+ err = neigh_xmit(AF_UNSPEC, out_dev,
out_dev->dev_addr, skb);
else
err = neigh_xmit(nh->nh_via_table, out_dev,
@@ -651,14 +651,12 @@ static struct net_device *find_outdev(struct net *net,
if (!oif) {
switch (nh->nh_via_table) {
- case NEIGH_ARP_TABLE:
+ case AF_INET:
dev = inet_fib_lookup_dev(net, mpls_nh_via(rt, nh));
break;
- case NEIGH_ND_TABLE:
+ case AF_INET6:
dev = inet6_fib_lookup_dev(net, mpls_nh_via(rt, nh));
break;
- case NEIGH_LINK_TABLE:
- break;
}
} else {
dev = dev_get_by_index(net, oif);
@@ -694,7 +692,7 @@ static int mpls_nh_assign_dev(struct net *net, struct mpls_route *rt,
if (!mpls_dev_get(dev))
goto errout;
- if ((nh->nh_via_table == NEIGH_LINK_TABLE) &&
+ if ((nh->nh_via_table == MPLS_NEIGH_TABLE_UNSPEC) &&
(dev->addr_len != nh->nh_via_alen))
goto errout;
@@ -739,15 +737,15 @@ static int nla_get_via(const struct nlattr *nla, u8 *via_alen, u8 *via_table,
/* Validate the address family */
switch (via->rtvia_family) {
case AF_PACKET:
- *via_table = NEIGH_LINK_TABLE;
+ *via_table = MPLS_NEIGH_TABLE_UNSPEC;
break;
case AF_INET:
- *via_table = NEIGH_ARP_TABLE;
+ *via_table = AF_INET;
if (alen != 4)
goto errout;
break;
case AF_INET6:
- *via_table = NEIGH_ND_TABLE;
+ *via_table = AF_INET6;
if (alen != 16)
goto errout;
break;
@@ -1596,23 +1594,16 @@ static struct notifier_block mpls_dev_notifier = {
.notifier_call = mpls_dev_notify,
};
-static int nla_put_via(struct sk_buff *skb,
- u8 table, const void *addr, int alen)
+static int nla_put_via(struct sk_buff *skb, u8 family,
+ const void *addr, int alen)
{
- static const int table_to_family[NEIGH_NR_TABLES + 1] = {
- AF_INET, AF_INET6, AF_DECnet, AF_PACKET,
- };
struct nlattr *nla;
struct rtvia *via;
- int family = AF_UNSPEC;
nla = nla_reserve(skb, RTA_VIA, alen + 2);
if (!nla)
return -EMSGSIZE;
- if (table <= NEIGH_NR_TABLES)
- family = table_to_family[table];
-
via = nla_data(nla);
via->rtvia_family = family;
memcpy(via->rtvia_addr, addr, alen);
@@ -2295,7 +2286,7 @@ static int resize_platform_label_table(struct net *net, size_t limit)
rt0->rt_protocol = RTPROT_KERNEL;
rt0->rt_payload_type = MPT_IPV4;
rt0->rt_ttl_propagate = MPLS_TTL_PROP_DEFAULT;
- rt0->rt_nh->nh_via_table = NEIGH_LINK_TABLE;
+ rt0->rt_nh->nh_via_table = MPLS_NEIGH_TABLE_UNSPEC;
rt0->rt_nh->nh_via_alen = lo->addr_len;
memcpy(__mpls_nh_via(rt0, rt0->rt_nh), lo->dev_addr,
lo->addr_len);
@@ -2309,7 +2300,7 @@ static int resize_platform_label_table(struct net *net, size_t limit)
rt2->rt_protocol = RTPROT_KERNEL;
rt2->rt_payload_type = MPT_IPV6;
rt2->rt_ttl_propagate = MPLS_TTL_PROP_DEFAULT;
- rt2->rt_nh->nh_via_table = NEIGH_LINK_TABLE;
+ rt2->rt_nh->nh_via_table = MPLS_NEIGH_TABLE_UNSPEC;
rt2->rt_nh->nh_via_alen = lo->addr_len;
memcpy(__mpls_nh_via(rt2, rt2->rt_nh), lo->dev_addr,
lo->addr_len);
diff --git a/net/mpls/mpls_iptunnel.c b/net/mpls/mpls_iptunnel.c
index 6e558a419f60..6dc8370c290d 100644
--- a/net/mpls/mpls_iptunnel.c
+++ b/net/mpls/mpls_iptunnel.c
@@ -138,11 +138,9 @@ static int mpls_xmit(struct sk_buff *skb)
mpls_stats_inc_outucastpkts(out_dev, skb);
if (rt)
- err = neigh_xmit(NEIGH_ARP_TABLE, out_dev, &rt->rt_gateway,
- skb);
+ err = neigh_xmit(AF_INET, out_dev, &rt->rt_gateway, skb);
else if (rt6)
- err = neigh_xmit(NEIGH_ND_TABLE, out_dev, &rt6->rt6i_gateway,
- skb);
+ err = neigh_xmit(AF_INET6, out_dev, &rt6->rt6i_gateway, skb);
if (err)
net_dbg_ratelimited("%s: packet transmission failed: %d\n",
__func__, err);
diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c
index 15ed91309992..e56fcea9c7ba 100644
--- a/net/netfilter/nf_flow_table_ip.c
+++ b/net/netfilter/nf_flow_table_ip.c
@@ -265,7 +265,7 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
skb->dev = outdev;
nexthop = rt_nexthop(rt, flow->tuplehash[!dir].tuple.src_v4.s_addr);
skb_dst_set_noref(skb, &rt->dst);
- neigh_xmit(NEIGH_ARP_TABLE, outdev, &nexthop, skb);
+ neigh_xmit(AF_INET, outdev, &nexthop, skb);
return NF_STOLEN;
}
@@ -482,7 +482,7 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
skb->dev = outdev;
nexthop = rt6_nexthop(rt, &flow->tuplehash[!dir].tuple.src_v6);
skb_dst_set_noref(skb, &rt->dst);
- neigh_xmit(NEIGH_ND_TABLE, outdev, nexthop, skb);
+ neigh_xmit(AF_INET6, outdev, nexthop, skb);
return NF_STOLEN;
}
diff --git a/net/netfilter/nft_fwd_netdev.c b/net/netfilter/nft_fwd_netdev.c
index 8abb9891cdf2..c361b0636a8c 100644
--- a/net/netfilter/nft_fwd_netdev.c
+++ b/net/netfilter/nft_fwd_netdev.c
@@ -84,7 +84,7 @@ static void nft_fwd_neigh_eval(const struct nft_expr *expr,
unsigned int verdict = NF_STOLEN;
struct sk_buff *skb = pkt->skb;
struct net_device *dev;
- int neigh_table;
+ u8 neigh_table;
switch (priv->nfproto) {
case NFPROTO_IPV4: {
@@ -100,7 +100,7 @@ static void nft_fwd_neigh_eval(const struct nft_expr *expr,
}
iph = ip_hdr(skb);
ip_decrease_ttl(iph);
- neigh_table = NEIGH_ARP_TABLE;
+ neigh_table = AF_INET;
break;
}
case NFPROTO_IPV6: {
@@ -116,7 +116,7 @@ static void nft_fwd_neigh_eval(const struct nft_expr *expr,
}
ip6h = ipv6_hdr(skb);
ip6h->hop_limit--;
- neigh_table = NEIGH_ND_TABLE;
+ neigh_table = AF_INET6;
break;
}
default:
--
2.11.0
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