| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1375724829-19343-1-git-send-email-pshelar@nicira.com>
Date: Mon, 5 Aug 2013 10:47:09 -0700
From: Pravin B Shelar <pshelar@...ira.com>
To: netdev@...r.kernel.org
Cc: stephen@...workplumber.org, Pravin B Shelar <pshelar@...ira.com>
Subject: [PATCH net-next v7 1/8] vxlan: Restructure vxlan socket apis.
Restructure vxlan-socket management APIs so that it can be
shared between ovs.
This patch does not change any functionality.
Signed-off-by: Pravin B Shelar <pshelar@...ira.com>
v6-v7:
- get rid of zero refcnt vs from hashtable.
---
drivers/net/vxlan.c | 92 ++++++++++++++++++++++++++++----------------------
1 files changed, 51 insertions(+), 41 deletions(-)
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 8bf31d9..9c3d4f0 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -188,7 +188,7 @@ static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
}
/* Find VXLAN socket based on network namespace and UDP port */
-static struct vxlan_sock *vxlan_find_port(struct net *net, __be16 port)
+static struct vxlan_sock *vxlan_find_sock(struct net *net, __be16 port)
{
struct vxlan_sock *vs;
@@ -205,7 +205,7 @@ static struct vxlan_dev *vxlan_find_vni(struct net *net, u32 id, __be16 port)
struct vxlan_sock *vs;
struct vxlan_dev *vxlan;
- vs = vxlan_find_port(net, port);
+ vs = vxlan_find_sock(net, port);
if (!vs)
return NULL;
@@ -1365,25 +1365,31 @@ static void vxlan_cleanup(unsigned long arg)
mod_timer(&vxlan->age_timer, next_timer);
}
+static void vxlan_vs_add_dev(struct vxlan_sock *vs, struct vxlan_dev *vxlan)
+{
+ __u32 vni = vxlan->default_dst.remote_vni;
+
+ vxlan->vn_sock = vs;
+ hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));
+}
+
/* Setup stats when device is created */
static int vxlan_init(struct net_device *dev)
{
struct vxlan_dev *vxlan = netdev_priv(dev);
struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id);
struct vxlan_sock *vs;
- __u32 vni = vxlan->default_dst.remote_vni;
dev->tstats = alloc_percpu(struct pcpu_tstats);
if (!dev->tstats)
return -ENOMEM;
spin_lock(&vn->sock_lock);
- vs = vxlan_find_port(dev_net(dev), vxlan->dst_port);
+ vs = vxlan_find_sock(dev_net(dev), vxlan->dst_port);
if (vs) {
/* If we have a socket with same port already, reuse it */
atomic_inc(&vs->refcnt);
- vxlan->vn_sock = vs;
- hlist_add_head_rcu(&vxlan->hlist, vni_head(vs, vni));
+ vxlan_vs_add_dev(vs, vxlan);
} else {
/* otherwise make new socket outside of RTNL */
dev_hold(dev);
@@ -1633,6 +1639,7 @@ static void vxlan_del_work(struct work_struct *work)
static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port)
{
+ struct vxlan_net *vn = net_generic(net, vxlan_net_id);
struct vxlan_sock *vs;
struct sock *sk;
struct sockaddr_in vxlan_addr = {
@@ -1644,8 +1651,10 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port)
unsigned int h;
vs = kmalloc(sizeof(*vs), GFP_KERNEL);
- if (!vs)
+ if (!vs) {
+ pr_debug("memory alocation failure\n");
return ERR_PTR(-ENOMEM);
+ }
for (h = 0; h < VNI_HASH_SIZE; ++h)
INIT_HLIST_HEAD(&vs->vni_list[h]);
@@ -1673,57 +1682,57 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port)
kfree(vs);
return ERR_PTR(rc);
}
+ atomic_set(&vs->refcnt, 1);
/* Disable multicast loopback */
inet_sk(sk)->mc_loop = 0;
+ spin_lock(&vn->sock_lock);
+ hlist_add_head_rcu(&vs->hlist, vs_head(net, port));
+ spin_unlock(&vn->sock_lock);
/* Mark socket as an encapsulation socket. */
udp_sk(sk)->encap_type = 1;
udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv;
udp_encap_enable();
- atomic_set(&vs->refcnt, 1);
+ return vs;
+}
+
+static struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port)
+{
+ struct vxlan_net *vn = net_generic(net, vxlan_net_id);
+ struct vxlan_sock *vs;
+
+ vs = vxlan_socket_create(net, port);
+ if (!IS_ERR(vs))
+ return vs;
+ spin_lock(&vn->sock_lock);
+ vs = vxlan_find_sock(net, port);
+ if (vs)
+ atomic_inc(&vs->refcnt);
+ else
+ vs = ERR_PTR(-EINVAL);
+
+ spin_unlock(&vn->sock_lock);
return vs;
}
/* Scheduled at device creation to bind to a socket */
static void vxlan_sock_work(struct work_struct *work)
{
- struct vxlan_dev *vxlan
- = container_of(work, struct vxlan_dev, sock_work);
- struct net_device *dev = vxlan->dev;
- struct net *net = dev_net(dev);
- __u32 vni = vxlan->default_dst.remote_vni;
- __be16 port = vxlan->dst_port;
+ struct vxlan_dev *vxlan = container_of(work, struct vxlan_dev, sock_work);
+ struct net *net = dev_net(vxlan->dev);
struct vxlan_net *vn = net_generic(net, vxlan_net_id);
- struct vxlan_sock *nvs, *ovs;
-
- nvs = vxlan_socket_create(net, port);
- if (IS_ERR(nvs)) {
- netdev_err(vxlan->dev, "Can not create UDP socket, %ld\n",
- PTR_ERR(nvs));
- goto out;
- }
+ __be16 port = vxlan->dst_port;
+ struct vxlan_sock *nvs;
+ nvs = vxlan_sock_add(net, port);
spin_lock(&vn->sock_lock);
- /* Look again to see if can reuse socket */
- ovs = vxlan_find_port(net, port);
- if (ovs) {
- atomic_inc(&ovs->refcnt);
- vxlan->vn_sock = ovs;
- hlist_add_head_rcu(&vxlan->hlist, vni_head(ovs, vni));
- spin_unlock(&vn->sock_lock);
-
- sk_release_kernel(nvs->sock->sk);
- kfree(nvs);
- } else {
- vxlan->vn_sock = nvs;
- hlist_add_head_rcu(&nvs->hlist, vs_head(net, port));
- hlist_add_head_rcu(&vxlan->hlist, vni_head(nvs, vni));
- spin_unlock(&vn->sock_lock);
- }
-out:
- dev_put(dev);
+ if (!IS_ERR(nvs))
+ vxlan_vs_add_dev(nvs, vxlan);
+ spin_unlock(&vn->sock_lock);
+
+ dev_put(vxlan->dev);
}
static int vxlan_newlink(struct net *net, struct net_device *dev,
@@ -1840,7 +1849,8 @@ static void vxlan_dellink(struct net_device *dev, struct list_head *head)
flush_workqueue(vxlan_wq);
spin_lock(&vn->sock_lock);
- hlist_del_rcu(&vxlan->hlist);
+ if (!hlist_unhashed(&vxlan->hlist))
+ hlist_del_rcu(&vxlan->hlist);
spin_unlock(&vn->sock_lock);
list_del(&vxlan->next);
--
1.7.1
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists