From faa041a40b9fa64913789fcc0161c7c73161f57e Mon Sep 17 00:00:00 2001
From: David Ahern <dsahern@gmail.com>
Date: Wed, 27 Mar 2019 20:53:49 -0700
Subject: [PATCH] ipv4: Create cleanup helper for fib_nh
Move the fib_nh cleanup code from free_fib_info_rcu into a new helper,
fib_nh_release. Move classid accounting into fib_nh_release which is
called per fib_nh to make accounting symmetrical with fib_nh_init.
Export the helper to allow for use with nexthop objects in the
future.
Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/net/ip_fib.h | 1 +
net/ipv4/fib_semantics.c | 29 +++++++++++++++++------------
2 files changed, 18 insertions(+), 12 deletions(-)
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 1af1f552644a9..5a4df0ba175e4 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -419,6 +419,7 @@ void fib_select_path(struct net *net, struct fib_result *res,
int fib_nh_init(struct net *net, struct fib_nh *fib_nh,
struct fib_config *cfg, int nh_weight,
struct netlink_ext_ack *extack);
+void fib_nh_release(struct net *net, struct fib_nh *fib_nh);
/* Exported by fib_trie.c */
void fib_trie_init(void);
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index cd15746e2b3f7..184940a06cb51 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -204,18 +204,28 @@ static void rt_fibinfo_free_cpus(struct rtable __rcu * __percpu *rtp)
free_percpu(rtp);
}
+void fib_nh_release(struct net *net, struct fib_nh *fib_nh)
+{
+#ifdef CONFIG_IP_ROUTE_CLASSID
+ if (fib_nh->nh_tclassid)
+ net->ipv4.fib_num_tclassid_users--;
+#endif
+ if (fib_nh->nh_dev)
+ dev_put(fib_nh->nh_dev);
+
+ lwtstate_put(fib_nh->nh_lwtstate);
+ free_nh_exceptions(fib_nh);
+ rt_fibinfo_free_cpus(fib_nh->nh_pcpu_rth_output);
+ rt_fibinfo_free(&fib_nh->nh_rth_input);
+}
+
/* Release a nexthop info record */
static void free_fib_info_rcu(struct rcu_head *head)
{
struct fib_info *fi = container_of(head, struct fib_info, rcu);
change_nexthops(fi) {
- if (nexthop_nh->nh_dev)
- dev_put(nexthop_nh->nh_dev);
- lwtstate_put(nexthop_nh->nh_lwtstate);
- free_nh_exceptions(nexthop_nh);
- rt_fibinfo_free_cpus(nexthop_nh->nh_pcpu_rth_output);
- rt_fibinfo_free(&nexthop_nh->nh_rth_input);
+ fib_nh_release(fi->fib_net, nexthop_nh);
} endfor_nexthops(fi);
ip_fib_metrics_put(fi->fib_metrics);
@@ -230,12 +240,7 @@ void free_fib_info(struct fib_info *fi)
return;
}
fib_info_cnt--;
-#ifdef CONFIG_IP_ROUTE_CLASSID
- change_nexthops(fi) {
- if (nexthop_nh->nh_tclassid)
- fi->fib_net->ipv4.fib_num_tclassid_users--;
- } endfor_nexthops(fi);
-#endif
+
call_rcu(&fi->rcu, free_fib_info_rcu);
}
EXPORT_SYMBOL_GPL(free_fib_info);
--
2.49.0