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Date: Mon, 17 Aug 2015 14:11:44 -0700
From: Pravin B Shelar <pshelar@...ira.com>
To: netdev@...r.kernel.org
Cc: Pravin B Shelar <pshelar@...ira.com>
Subject: [PATCH net-next v2 8/9] geneve: Move device hash table to geneve socket.
This change simplifies Geneve Tunnel hash table management.
Signed-off-by: Pravin B Shelar <pshelar@...ira.com>
---
drivers/net/geneve.c | 76 ++++++++++++++++++++++++++++------------------------
1 file changed, 41 insertions(+), 35 deletions(-)
diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index eb298ff..e47cdd9 100644
--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -40,7 +40,6 @@ MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
/* per-network namespace private data for this module */
struct geneve_net {
struct list_head geneve_list;
- struct hlist_head vni_list[VNI_HASH_SIZE];
struct list_head sock_list;
};
@@ -63,12 +62,12 @@ struct geneve_dev {
struct geneve_sock {
bool collect_md;
- struct geneve_net *gn;
struct list_head list;
struct socket *sock;
struct rcu_head rcu;
int refcnt;
struct udp_offload udp_offloads;
+ struct hlist_head vni_list[VNI_HASH_SIZE];
};
static inline __u32 geneve_net_vni_hash(u8 vni[3])
@@ -90,7 +89,7 @@ static __be64 vni_to_tunnel_id(const __u8 *vni)
#endif
}
-static struct geneve_dev *geneve_lookup(struct geneve_net *gn, __be16 port,
+static struct geneve_dev *geneve_lookup(struct geneve_sock *gs,
__be32 addr, u8 vni[])
{
struct hlist_head *vni_list_head;
@@ -99,13 +98,11 @@ static struct geneve_dev *geneve_lookup(struct geneve_net *gn, __be16 port,
/* Find the device for this VNI */
hash = geneve_net_vni_hash(vni);
- vni_list_head = &gn->vni_list[hash];
+ vni_list_head = &gs->vni_list[hash];
hlist_for_each_entry_rcu(geneve, vni_list_head, hlist) {
if (!memcmp(vni, geneve->vni, sizeof(geneve->vni)) &&
- addr == geneve->remote.sin_addr.s_addr &&
- port == geneve->dst_port) {
+ addr == geneve->remote.sin_addr.s_addr)
return geneve;
- }
}
return NULL;
}
@@ -118,9 +115,7 @@ static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb)
/* geneve receive/decap routine */
static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
{
- struct inet_sock *sk = inet_sk(gs->sock->sk);
struct genevehdr *gnvh = geneve_hdr(skb);
- struct geneve_net *gn = gs->gn;
struct metadata_dst *tun_dst = NULL;
struct geneve_dev *geneve = NULL;
struct pcpu_sw_netstats *stats;
@@ -130,8 +125,6 @@ static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
bool xnet;
int err;
- iph = ip_hdr(skb); /* Still outer IP header... */
-
if (gs->collect_md) {
static u8 zero_vni[3];
@@ -139,10 +132,11 @@ static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
addr = 0;
} else {
vni = gnvh->vni;
+ iph = ip_hdr(skb); /* Still outer IP header... */
addr = iph->saddr;
}
- geneve = geneve_lookup(gn, sk->inet_sport, addr, vni);
+ geneve = geneve_lookup(gs, addr, vni);
if (!geneve)
goto drop;
@@ -419,6 +413,7 @@ static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
struct geneve_sock *gs;
struct socket *sock;
struct udp_tunnel_sock_cfg tunnel_cfg;
+ int h;
gs = kzalloc(sizeof(*gs), GFP_KERNEL);
if (!gs)
@@ -432,7 +427,8 @@ static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
gs->sock = sock;
gs->refcnt = 1;
- gs->gn = gn;
+ for (h = 0; h < VNI_HASH_SIZE; ++h)
+ INIT_HLIST_HEAD(&gs->vni_list[h]);
/* Initialize the geneve udp offloads structure */
gs->udp_offloads.port = port;
@@ -446,7 +442,6 @@ static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
tunnel_cfg.encap_rcv = geneve_udp_encap_recv;
tunnel_cfg.encap_destroy = NULL;
setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
-
list_add(&gs->list, &gn->sock_list);
return gs;
}
@@ -471,19 +466,32 @@ static void geneve_sock_release(struct geneve_sock *gs)
kfree_rcu(gs, rcu);
}
+static struct geneve_sock *geneve_find_sock(struct geneve_net *gn,
+ __be16 dst_port)
+{
+ struct geneve_sock *gs;
+
+ list_for_each_entry(gs, &gn->sock_list, list) {
+ if (inet_sk(gs->sock->sk)->inet_sport == dst_port &&
+ inet_sk(gs->sock->sk)->sk.sk_family == AF_INET) {
+ return gs;
+ }
+ }
+ return NULL;
+}
+
static int geneve_open(struct net_device *dev)
{
struct geneve_dev *geneve = netdev_priv(dev);
struct net *net = geneve->net;
struct geneve_net *gn = net_generic(net, geneve_net_id);
struct geneve_sock *gs;
+ __u32 hash;
- list_for_each_entry(gs, &gn->sock_list, list) {
- if (inet_sk(gs->sock->sk)->inet_sport == geneve->dst_port &&
- inet_sk(gs->sock->sk)->sk.sk_family == AF_INET) {
- gs->refcnt++;
- goto out;
- }
+ gs = geneve_find_sock(gn, geneve->dst_port);
+ if (gs) {
+ gs->refcnt++;
+ goto out;
}
gs = geneve_socket_create(net, geneve->dst_port, false);
@@ -494,6 +502,9 @@ out:
if (geneve->collect_md)
gs->collect_md = true;
geneve->sock = gs;
+
+ hash = geneve_net_vni_hash(geneve->vni);
+ hlist_add_head_rcu(&geneve->hlist, &gs->vni_list[hash]);
return 0;
}
@@ -505,6 +516,8 @@ static int geneve_stop(struct net_device *dev)
if (geneve->collect_md)
gs->collect_md = false;
+ if (!hlist_unhashed(&geneve->hlist))
+ hlist_del_rcu(&geneve->hlist);
geneve_sock_release(gs);
return 0;
}
@@ -792,8 +805,8 @@ static int geneve_configure(struct net *net, struct net_device *dev,
__u16 dst_port, bool metadata)
{
struct geneve_net *gn = net_generic(net, geneve_net_id);
- struct geneve_dev *t, *geneve = netdev_priv(dev);
- __u32 hash;
+ struct geneve_dev *geneve = netdev_priv(dev);
+ struct geneve_dev *t;
int err;
geneve->net = net;
@@ -807,9 +820,12 @@ static int geneve_configure(struct net *net, struct net_device *dev,
if (IN_MULTICAST(ntohl(geneve->remote.sin_addr.s_addr)))
return -EINVAL;
- t = geneve_lookup(gn, htons(dst_port), rem_addr, geneve->vni);
- if (t)
- return -EBUSY;
+ list_for_each_entry(t, &gn->geneve_list, next) {
+ if (!memcmp(geneve->vni, t->vni, sizeof(t->vni)) &&
+ rem_addr == t->remote.sin_addr.s_addr &&
+ htons(dst_port) == geneve->dst_port)
+ return -EBUSY;
+ }
geneve->ttl = ttl;
geneve->tos = tos;
@@ -821,8 +837,6 @@ static int geneve_configure(struct net *net, struct net_device *dev,
return err;
list_add(&geneve->next, &gn->geneve_list);
- hash = geneve_net_vni_hash(geneve->vni);
- hlist_add_head_rcu(&geneve->hlist, &gn->vni_list[hash]);
return 0;
}
@@ -861,9 +875,6 @@ static void geneve_dellink(struct net_device *dev, struct list_head *head)
{
struct geneve_dev *geneve = netdev_priv(dev);
- if (!hlist_unhashed(&geneve->hlist))
- hlist_del_rcu(&geneve->hlist);
-
list_del(&geneve->next);
unregister_netdevice_queue(dev, head);
}
@@ -948,14 +959,9 @@ EXPORT_SYMBOL_GPL(geneve_dev_create_fb);
static __net_init int geneve_init_net(struct net *net)
{
struct geneve_net *gn = net_generic(net, geneve_net_id);
- unsigned int h;
INIT_LIST_HEAD(&gn->geneve_list);
-
INIT_LIST_HEAD(&gn->sock_list);
- for (h = 0; h < VNI_HASH_SIZE; ++h)
- INIT_HLIST_HEAD(&gn->vni_list[h]);
-
return 0;
}
--
1.8.3.1
--
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