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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>
This commit is contained in:
Yuval Mintz 2018-03-26 15:01:35 +03:00 committed by David S. Miller
parent 088aa3eec2
commit d3c07e5b99
2 changed files with 17 additions and 0 deletions
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10
include/linux/mroute6.h
View File

@ -8,6 +8,7 @@
#include <net/net_namespace.h>
#include <uapi/linux/mroute6.h>
#include <linux/mroute_base.h>
#include <net/fib_rules.h>
#ifdef CONFIG_IPV6_MROUTE
static inline int ip6_mroute_opt(int opt)
@ -63,6 +64,15 @@ static inline void ip6_mr_cleanup(void)
}
#endif
#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
bool ip6mr_rule_default(const struct fib_rule *rule);
#else
static inline bool ip6mr_rule_default(const struct fib_rule *rule)
{
return true;
}
#endif
#define VIFF_STATIC 0x8000
struct mfc6_cache_cmp_arg {

7
net/ipv6/ip6mr.c
View File

@ -268,6 +268,13 @@ static unsigned int ip6mr_rules_seq_read(struct net *net)
{
return fib_rules_seq_read(net, RTNL_FAMILY_IP6MR);
}
bool ip6mr_rule_default(const struct fib_rule *rule)
{
return fib_rule_matchall(rule) && rule->action == FR_ACT_TO_TBL &&
rule->table == RT6_TABLE_DFLT && !rule->l3mdev;
}
EXPORT_SYMBOL(ip6mr_rule_default);
#else
#define ip6mr_for_each_table(mrt, net) \
for (mrt = net->ipv6.mrt6; mrt; mrt = NULL)