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Commit 3dfbcc41 authored by Thomas Graf's avatar Thomas Graf Committed by David S. Miller
Browse files

[NET] rules: Add support to invert selectors 



Introduces a new flag FIB_RULE_INVERT causing rules to apply
if the specified selector doesn't match.

Signed-off-by: default avatarThomas Graf <tgraf@suug.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1f6c9557

include/linux/fib_rules.h

+1 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 


/* rule is permanent, and cannot be deleted */

#define FIB_RULE_PERMANENT	1

#define FIB_RULE_INVERT		2



struct fib_rule_hdr

{

net/core/fib_rules.c

+17 −7
Original line number Diff line number Diff line
@@ -107,6 +107,22 @@ int fib_rules_unregister(struct fib_rules_ops *ops) 


EXPORT_SYMBOL_GPL(fib_rules_unregister);



static int fib_rule_match(struct fib_rule *rule, struct fib_rules_ops *ops,

			  struct flowi *fl, int flags)

{

	int ret = 0;



	if (rule->ifindex && (rule->ifindex != fl->iif))

		goto out;



	if ((rule->mark ^ fl->mark) & rule->mark_mask)

		goto out;



	ret = ops->match(rule, fl, flags);

out:

	return (rule->flags & FIB_RULE_INVERT) ? !ret : ret;

}



int fib_rules_lookup(struct fib_rules_ops *ops, struct flowi *fl,

		     int flags, struct fib_lookup_arg *arg)

{
@@ -116,13 +132,7 @@ int fib_rules_lookup(struct fib_rules_ops *ops, struct flowi *fl, 
	rcu_read_lock();



	list_for_each_entry_rcu(rule, ops->rules_list, list) {

		if (rule->ifindex && (rule->ifindex != fl->iif))

			continue;



		if ((rule->mark ^ fl->mark) & rule->mark_mask)

			continue;



		if (!ops->match(rule, fl, flags))

		if (!fib_rule_match(rule, ops, fl, flags))

			continue;



		err = ops->action(rule, fl, flags, arg);