vxlan_multicast: Move multicast helpers to a separate file
subsequent patches will add more helpers. Signed-off-by: Roopa Prabhu <roopa@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu
David S. Miller
parent
7b8135f4df
commit
a498c5953a
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@ -4,4 +4,4 @@
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obj-$(CONFIG_VXLAN) += vxlan.o
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vxlan-objs := vxlan_core.o
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vxlan-objs := vxlan_core.o vxlan_multicast.o
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@ -1445,58 +1445,6 @@ static bool vxlan_snoop(struct net_device *dev,
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return false;
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}
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/* See if multicast group is already in use by other ID */
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static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev,
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union vxlan_addr *rip, int rifindex)
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{
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union vxlan_addr *ip = (rip ? : &dev->default_dst.remote_ip);
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int ifindex = (rifindex ? : dev->default_dst.remote_ifindex);
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struct vxlan_dev *vxlan;
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struct vxlan_sock *sock4;
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#if IS_ENABLED(CONFIG_IPV6)
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struct vxlan_sock *sock6;
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#endif
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unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
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sock4 = rtnl_dereference(dev->vn4_sock);
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/* The vxlan_sock is only used by dev, leaving group has
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* no effect on other vxlan devices.
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*/
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if (family == AF_INET && sock4 && refcount_read(&sock4->refcnt) == 1)
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return false;
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#if IS_ENABLED(CONFIG_IPV6)
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sock6 = rtnl_dereference(dev->vn6_sock);
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if (family == AF_INET6 && sock6 && refcount_read(&sock6->refcnt) == 1)
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return false;
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#endif
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list_for_each_entry(vxlan, &vn->vxlan_list, next) {
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if (!netif_running(vxlan->dev) || vxlan == dev)
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continue;
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if (family == AF_INET &&
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rtnl_dereference(vxlan->vn4_sock) != sock4)
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continue;
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#if IS_ENABLED(CONFIG_IPV6)
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if (family == AF_INET6 &&
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rtnl_dereference(vxlan->vn6_sock) != sock6)
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continue;
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#endif
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if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip,
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ip))
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continue;
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if (vxlan->default_dst.remote_ifindex != ifindex)
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continue;
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return true;
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}
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return false;
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}
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static bool __vxlan_sock_release_prep(struct vxlan_sock *vs)
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{
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struct vxlan_net *vn;
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@ -1545,77 +1493,6 @@ static void vxlan_sock_release(struct vxlan_dev *vxlan)
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#endif
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}
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/* Update multicast group membership when first VNI on
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* multicast address is brought up
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*/
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static int vxlan_igmp_join(struct vxlan_dev *vxlan, union vxlan_addr *rip,
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int rifindex)
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{
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union vxlan_addr *ip = (rip ? : &vxlan->default_dst.remote_ip);
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int ifindex = (rifindex ? : vxlan->default_dst.remote_ifindex);
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int ret = -EINVAL;
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struct sock *sk;
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if (ip->sa.sa_family == AF_INET) {
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struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
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struct ip_mreqn mreq = {
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.imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
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.imr_ifindex = ifindex,
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};
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sk = sock4->sock->sk;
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lock_sock(sk);
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ret = ip_mc_join_group(sk, &mreq);
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release_sock(sk);
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#if IS_ENABLED(CONFIG_IPV6)
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} else {
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struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
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sk = sock6->sock->sk;
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lock_sock(sk);
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ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
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&ip->sin6.sin6_addr);
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release_sock(sk);
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#endif
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}
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return ret;
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}
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static int vxlan_igmp_leave(struct vxlan_dev *vxlan, union vxlan_addr *rip,
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int rifindex)
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{
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union vxlan_addr *ip = (rip ? : &vxlan->default_dst.remote_ip);
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int ifindex = (rifindex ? : vxlan->default_dst.remote_ifindex);
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int ret = -EINVAL;
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struct sock *sk;
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if (ip->sa.sa_family == AF_INET) {
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struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
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struct ip_mreqn mreq = {
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.imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
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.imr_ifindex = ifindex,
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};
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sk = sock4->sock->sk;
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lock_sock(sk);
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ret = ip_mc_leave_group(sk, &mreq);
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release_sock(sk);
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#if IS_ENABLED(CONFIG_IPV6)
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} else {
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struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
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sk = sock6->sock->sk;
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lock_sock(sk);
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ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
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&ip->sin6.sin6_addr);
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release_sock(sk);
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#endif
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}
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return ret;
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}
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static bool vxlan_remcsum(struct vxlanhdr *unparsed,
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struct sk_buff *skb, u32 vxflags)
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{
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@ -0,0 +1,134 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Vxlan multicast group handling
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*
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*/
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#include <linux/kernel.h>
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#include <net/net_namespace.h>
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#include <net/sock.h>
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#include <linux/igmp.h>
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#include <net/vxlan.h>
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#include "vxlan_private.h"
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/* Update multicast group membership when first VNI on
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* multicast address is brought up
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*/
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int vxlan_igmp_join(struct vxlan_dev *vxlan, union vxlan_addr *rip,
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int rifindex)
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{
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union vxlan_addr *ip = (rip ? : &vxlan->default_dst.remote_ip);
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int ifindex = (rifindex ? : vxlan->default_dst.remote_ifindex);
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int ret = -EINVAL;
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struct sock *sk;
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if (ip->sa.sa_family == AF_INET) {
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struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
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struct ip_mreqn mreq = {
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.imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
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.imr_ifindex = ifindex,
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};
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sk = sock4->sock->sk;
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lock_sock(sk);
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ret = ip_mc_join_group(sk, &mreq);
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release_sock(sk);
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#if IS_ENABLED(CONFIG_IPV6)
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} else {
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struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
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sk = sock6->sock->sk;
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lock_sock(sk);
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ret = ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
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&ip->sin6.sin6_addr);
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release_sock(sk);
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#endif
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}
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return ret;
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}
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int vxlan_igmp_leave(struct vxlan_dev *vxlan, union vxlan_addr *rip,
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int rifindex)
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{
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union vxlan_addr *ip = (rip ? : &vxlan->default_dst.remote_ip);
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int ifindex = (rifindex ? : vxlan->default_dst.remote_ifindex);
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int ret = -EINVAL;
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struct sock *sk;
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if (ip->sa.sa_family == AF_INET) {
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struct vxlan_sock *sock4 = rtnl_dereference(vxlan->vn4_sock);
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struct ip_mreqn mreq = {
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.imr_multiaddr.s_addr = ip->sin.sin_addr.s_addr,
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.imr_ifindex = ifindex,
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};
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sk = sock4->sock->sk;
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lock_sock(sk);
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ret = ip_mc_leave_group(sk, &mreq);
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release_sock(sk);
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#if IS_ENABLED(CONFIG_IPV6)
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} else {
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struct vxlan_sock *sock6 = rtnl_dereference(vxlan->vn6_sock);
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sk = sock6->sock->sk;
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lock_sock(sk);
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ret = ipv6_stub->ipv6_sock_mc_drop(sk, ifindex,
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&ip->sin6.sin6_addr);
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release_sock(sk);
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#endif
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}
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return ret;
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}
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/* See if multicast group is already in use by other ID */
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bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev,
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union vxlan_addr *rip, int rifindex)
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{
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union vxlan_addr *ip = (rip ? : &dev->default_dst.remote_ip);
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int ifindex = (rifindex ? : dev->default_dst.remote_ifindex);
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struct vxlan_dev *vxlan;
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struct vxlan_sock *sock4;
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#if IS_ENABLED(CONFIG_IPV6)
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struct vxlan_sock *sock6;
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#endif
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unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
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sock4 = rtnl_dereference(dev->vn4_sock);
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/* The vxlan_sock is only used by dev, leaving group has
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* no effect on other vxlan devices.
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*/
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if (family == AF_INET && sock4 && refcount_read(&sock4->refcnt) == 1)
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return false;
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#if IS_ENABLED(CONFIG_IPV6)
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sock6 = rtnl_dereference(dev->vn6_sock);
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if (family == AF_INET6 && sock6 && refcount_read(&sock6->refcnt) == 1)
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return false;
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#endif
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list_for_each_entry(vxlan, &vn->vxlan_list, next) {
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if (!netif_running(vxlan->dev) || vxlan == dev)
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continue;
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if (family == AF_INET &&
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rtnl_dereference(vxlan->vn4_sock) != sock4)
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continue;
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#if IS_ENABLED(CONFIG_IPV6)
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if (family == AF_INET6 &&
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rtnl_dereference(vxlan->vn6_sock) != sock6)
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continue;
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#endif
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if (!vxlan_addr_equal(&vxlan->default_dst.remote_ip, ip))
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continue;
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if (vxlan->default_dst.remote_ifindex != ifindex)
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continue;
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return true;
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}
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return false;
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}
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@ -112,4 +112,11 @@ int vxlan_fdb_update(struct vxlan_dev *vxlan,
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__u32 ifindex, __u16 ndm_flags, u32 nhid,
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bool swdev_notify, struct netlink_ext_ack *extack);
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/* vxlan_multicast.c */
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int vxlan_igmp_join(struct vxlan_dev *vxlan, union vxlan_addr *rip,
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int rifindex);
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int vxlan_igmp_leave(struct vxlan_dev *vxlan, union vxlan_addr *rip,
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int rifindex);
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bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev,
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union vxlan_addr *rip, int rifindex);
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#endif
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