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authorDavid S. Miller <davem@davemloft.net>2012-06-29 01:32:45 -0700
committerDavid S. Miller <davem@davemloft.net>2012-06-29 01:36:36 -0700
commit7a9bc9b81a5bc6e44ebc80ef781332e4385083f2 (patch)
tree1342c672823d47bfb112fee63951af9f6a3eb590 /include/net/fib_rules.h
parentb8c8430726e5bd552e01dacc5a44f3f83f7446ca (diff)
downloadlinux-7a9bc9b81a5bc6e44ebc80ef781332e4385083f2.tar.gz
ipv4: Elide fib_validate_source() completely when possible.
If rpfilter is off (or the SKB has an IPSEC path) and there are not tclassid users, we don't have to do anything at all when fib_validate_source() is invoked besides setting the itag to zero. We monitor tclassid uses with a counter (modified only under RTNL and marked __read_mostly) and we protect the fib_validate_source() real work with a test against this counter and whether rpfilter is to be done. Having a way to know whether we need no tclassid processing or not also opens the door for future optimized rpfilter algorithms that do not perform full FIB lookups. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/fib_rules.h')
-rw-r--r--include/net/fib_rules.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h
index 075f1e3a0fe..e361f488242 100644
--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h
@@ -52,6 +52,7 @@ struct fib_rules_ops {
struct sk_buff *,
struct fib_rule_hdr *,
struct nlattr **);
+ void (*delete)(struct fib_rule *);
int (*compare)(struct fib_rule *,
struct fib_rule_hdr *,
struct nlattr **);