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nexthops: Add ipv6 helper to walk all fib6_nh in a nexthop struct

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IPv6 has traditionally had a single fib6_nh per fib6_info. With
nexthops we can have multiple fib6_nh associated with a fib6_info.
Add a nexthop helper to invoke a callback for each fib6_nh in a
'struct nexthop'. If the callback returns non-0, the loop is
stopped and the return value passed to the caller.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2019-06-08 14:53:22 -07:00
committed by David S. Miller
parent 948622f984
commit f88c9aa12f
2 changed files with 35 additions and 0 deletions
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4
include/net/nexthop.h
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@@ -305,4 +305,8 @@ static inline void nexthop_path_fib6_result(struct fib6_result *res, int hash)
res->nh = &nhi->fib6_nh;
}
}
int nexthop_for_each_fib6_nh(struct nexthop *nh,
int (*cb)(struct fib6_nh *nh, void *arg),
void *arg);
#endif