mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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96e8f5a9fe
Multicast routing is today handled in the input path. Locally generated MC packets don't hit the IPMR code today. Thus if a VXLAN remote address is multicast, the driver needs to set an OIF during route lookup. Thus MC routing configuration needs to be kept in sync with the VXLAN FDB and MDB. Ideally, the VXLAN packets would be routed by the MC routing code instead. To that end, this patch adds support to route locally generated multicast packets. The newly-added routines do largely what ip6_mr_input() and ip6_mr_forward() do: make an MR cache lookup to find where to send the packets, and use ip6_output() to send each of them. When no cache entry is found, the packet is punted to the daemon for resolution. Similarly to the IPv4 case in a previous patch, the new logic is contingent on a newly-added IP6CB flag being set. Signed-off-by: Petr Machata <petrm@nvidia.com> Link: https://patch.msgid.link/3bcc034a3ab4d3c291072fff38f78d7fbbeef4e6.1750113335.git.petrm@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
148 lines
3.1 KiB
C
148 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_MROUTE6_H
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#define __LINUX_MROUTE6_H
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#include <linux/pim.h>
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#include <linux/skbuff.h> /* for struct sk_buff_head */
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#include <net/net_namespace.h>
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#include <uapi/linux/mroute6.h>
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#include <linux/mroute_base.h>
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#include <linux/sockptr.h>
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#include <net/fib_rules.h>
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#ifdef CONFIG_IPV6_MROUTE
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static inline int ip6_mroute_opt(int opt)
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{
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return (opt >= MRT6_BASE) && (opt <= MRT6_MAX);
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}
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#else
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static inline int ip6_mroute_opt(int opt)
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{
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return 0;
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}
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#endif
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struct sock;
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#ifdef CONFIG_IPV6_MROUTE
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extern int ip6_mroute_setsockopt(struct sock *, int, sockptr_t, unsigned int);
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extern int ip6_mroute_getsockopt(struct sock *, int, sockptr_t, sockptr_t);
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extern int ip6_mr_input(struct sk_buff *skb);
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extern int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
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extern int ip6_mr_init(void);
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extern int ip6_mr_output(struct net *net, struct sock *sk, struct sk_buff *skb);
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extern void ip6_mr_cleanup(void);
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int ip6mr_ioctl(struct sock *sk, int cmd, void *arg);
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#else
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static inline int ip6_mroute_setsockopt(struct sock *sock, int optname,
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sockptr_t optval, unsigned int optlen)
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{
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return -ENOPROTOOPT;
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}
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static inline
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int ip6_mroute_getsockopt(struct sock *sock,
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int optname, sockptr_t optval, sockptr_t optlen)
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{
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return -ENOPROTOOPT;
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}
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static inline
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int ip6mr_ioctl(struct sock *sk, int cmd, void *arg)
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{
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return -ENOIOCTLCMD;
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}
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static inline int ip6_mr_init(void)
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{
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return 0;
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}
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static inline int
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ip6_mr_output(struct net *net, struct sock *sk, struct sk_buff *skb)
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{
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return ip6_output(net, sk, skb);
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}
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static inline void ip6_mr_cleanup(void)
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{
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return;
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}
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#endif
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#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
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bool ip6mr_rule_default(const struct fib_rule *rule);
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#else
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static inline bool ip6mr_rule_default(const struct fib_rule *rule)
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{
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return true;
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}
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#endif
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#define VIFF_STATIC 0x8000
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struct mfc6_cache_cmp_arg {
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struct in6_addr mf6c_mcastgrp;
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struct in6_addr mf6c_origin;
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};
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struct mfc6_cache {
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struct mr_mfc _c;
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union {
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struct {
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struct in6_addr mf6c_mcastgrp;
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struct in6_addr mf6c_origin;
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};
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struct mfc6_cache_cmp_arg cmparg;
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};
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};
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#define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
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struct rtmsg;
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extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
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struct rtmsg *rtm, u32 portid);
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#ifdef CONFIG_IPV6_MROUTE
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bool mroute6_is_socket(struct net *net, struct sk_buff *skb);
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extern int ip6mr_sk_done(struct sock *sk);
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static inline int ip6mr_sk_ioctl(struct sock *sk, unsigned int cmd,
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void __user *arg)
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{
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switch (cmd) {
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/* These userspace buffers will be consumed by ip6mr_ioctl() */
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case SIOCGETMIFCNT_IN6: {
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struct sioc_mif_req6 buffer;
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return sock_ioctl_inout(sk, cmd, arg, &buffer,
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sizeof(buffer));
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}
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case SIOCGETSGCNT_IN6: {
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struct sioc_sg_req6 buffer;
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return sock_ioctl_inout(sk, cmd, arg, &buffer,
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sizeof(buffer));
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}
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}
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return 1;
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}
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#else
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static inline bool mroute6_is_socket(struct net *net, struct sk_buff *skb)
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{
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return false;
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}
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static inline int ip6mr_sk_done(struct sock *sk)
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{
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return 0;
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}
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static inline int ip6mr_sk_ioctl(struct sock *sk, unsigned int cmd,
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void __user *arg)
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{
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return 1;
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}
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#endif
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#endif
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