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Commit e3ea9731 authored by Ido Schimmel's avatar Ido Schimmel Committed by David S. Miller
Browse files

ipv6: fib_rules: Check if rule is a default rule 



As explained in commit 3c71006d ("ipv4: fib_rules: Check if rule is
a default rule"), drivers supporting IPv6 FIB offload need to be able to
sanitize the rules they don't support and potentially flush their
tables.

Add an IPv6 helper to check if a FIB rule is a default rule.

Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1b2a4440

include/net/ip6_fib.h

+5 −0
Original line number Diff line number Diff line
@@ -295,6 +295,7 @@ int ipv6_route_open(struct inode *inode, struct file *file); 
#ifdef CONFIG_IPV6_MULTIPLE_TABLES

int fib6_rules_init(void);

void fib6_rules_cleanup(void);

bool fib6_rule_default(const struct fib_rule *rule);

#else

static inline int               fib6_rules_init(void)

{
@@ -304,5 +305,9 @@ static inline void fib6_rules_cleanup(void) 
{

	return ;

}

static inline bool fib6_rule_default(const struct fib_rule *rule)

{

	return true;

}

#endif

#endif

net/ipv6/fib6_rules.c

+20 −0
Original line number Diff line number Diff line
@@ -29,6 +29,26 @@ struct fib6_rule { 
	u8			tclass;

};



static bool fib6_rule_matchall(const struct fib_rule *rule)

{

	struct fib6_rule *r = container_of(rule, struct fib6_rule, common);



	if (r->dst.plen || r->src.plen || r->tclass)

		return false;

	return fib_rule_matchall(rule);

}



bool fib6_rule_default(const struct fib_rule *rule)

{

	if (!fib6_rule_matchall(rule) || rule->action != FR_ACT_TO_TBL ||

	    rule->l3mdev)

		return false;

	if (rule->table != RT6_TABLE_LOCAL && rule->table != RT6_TABLE_MAIN)

		return false;

	return true;

}

EXPORT_SYMBOL_GPL(fib6_rule_default);



struct dst_entry *fib6_rule_lookup(struct net *net, struct flowi6 *fl6,

				   int flags, pol_lookup_t lookup)

{