ip6mr: Add API for default_rule fib
Add the ability to discern whether a given FIB rule notification relates to the default rule inserted when registering ip6mr or a different one. Would later be used by drivers wishing to offload ipv6 multicast routes but unable to offload rules other than the default one. Signed-off-by: Yuval Mintz <yuvalm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -8,6 +8,7 @@
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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 <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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@ -63,6 +64,15 @@ static inline void ip6_mr_cleanup(void)
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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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@ -268,6 +268,13 @@ static unsigned int ip6mr_rules_seq_read(struct net *net)
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{
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return fib_rules_seq_read(net, RTNL_FAMILY_IP6MR);
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}
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bool ip6mr_rule_default(const struct fib_rule *rule)
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{
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return fib_rule_matchall(rule) && rule->action == FR_ACT_TO_TBL &&
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rule->table == RT6_TABLE_DFLT && !rule->l3mdev;
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}
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EXPORT_SYMBOL(ip6mr_rule_default);
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#else
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#define ip6mr_for_each_table(mrt, net) \
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for (mrt = net->ipv6.mrt6; mrt; mrt = NULL)
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