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authorIdo Schimmel <idosch@mellanox.com>2017-08-03 14:28:25 +0300
committerDavid S. Miller <davem@davemloft.net>2017-08-04 01:36:00 +0300
commita460aa83963b185a32a6377eb486b6e613ac8e38 (patch)
tree03992757839f1f03ae32475f966e300f7addf432 /include/net/ip6_fib.h
parentfc882fcff1ee774cb6be9d3c714ae5ab9eec5aa4 (diff)
downloadlinux-a460aa83963b185a32a6377eb486b6e613ac8e38.tar.xz
ipv6: fib: Add helpers to hold / drop a reference on rt6_info
Similar to commit 1c677b3d2828 ("ipv4: fib: Add fib_info_hold() helper") and commit b423cb10807b ("ipv4: fib: Export free_fib_info()") add an helper to hold a reference on rt6_info and export rt6_release() to drop it and potentially release the route. This is needed so that drivers capable of FIB offload could hold a reference on the route before queueing it for offload and drop it after the route has been programmed to the device's tables. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ip6_fib.h')
-rw-r--r--include/net/ip6_fib.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 0b3052157e6b..1d790ea40ea7 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -187,6 +187,22 @@ static inline void ip6_rt_put(struct rt6_info *rt)
dst_release(&rt->dst);
}
+void rt6_free_pcpu(struct rt6_info *non_pcpu_rt);
+
+static inline void rt6_hold(struct rt6_info *rt)
+{
+ atomic_inc(&rt->rt6i_ref);
+}
+
+static inline void rt6_release(struct rt6_info *rt)
+{
+ if (atomic_dec_and_test(&rt->rt6i_ref)) {
+ rt6_free_pcpu(rt);
+ dst_dev_put(&rt->dst);
+ dst_release(&rt->dst);
+ }
+}
+
enum fib6_walk_state {
#ifdef CONFIG_IPV6_SUBTREES
FWS_S,