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authorAl Viro <viro@zeniv.linux.org.uk>2018-10-08 13:22:43 +0300
committerDavid S. Miller <davem@davemloft.net>2018-10-08 20:33:35 +0300
commitb245d32c995868879f361d252f32bb8a2ca33deb (patch)
tree38ec387482ac2e5c6e965a3e2ed02bc364abbc98 /net/sched/cls_u32.c
parent8a8065f6836b4be114ff193248386f339a0c28f3 (diff)
downloadlinux-b245d32c995868879f361d252f32bb8a2ca33deb.tar.xz
net: sched: cls_u32: keep track of knodes count in tc_u_common
allows to simplify u32_delete() considerably Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/cls_u32.c')
-rw-r--r--net/sched/cls_u32.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 3d4c360f9b0c..61593bee08db 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -97,6 +97,7 @@ struct tc_u_common {
int refcnt;
struct idr handle_idr;
struct hlist_node hnode;
+ long knodes;
};
static inline unsigned int u32_hash_fold(__be32 key,
@@ -452,6 +453,7 @@ static void u32_delete_key_freepf_work(struct work_struct *work)
static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode *key)
{
+ struct tc_u_common *tp_c = tp->data;
struct tc_u_knode __rcu **kp;
struct tc_u_knode *pkp;
struct tc_u_hnode *ht = rtnl_dereference(key->ht_up);
@@ -462,6 +464,7 @@ static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode *key)
kp = &pkp->next, pkp = rtnl_dereference(*kp)) {
if (pkp == key) {
RCU_INIT_POINTER(*kp, key->next);
+ tp_c->knodes--;
tcf_unbind_filter(tp, &key->res);
idr_remove(&ht->handle_idr, key->handle);
@@ -576,6 +579,7 @@ static int u32_replace_hw_knode(struct tcf_proto *tp, struct tc_u_knode *n,
static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht,
struct netlink_ext_ack *extack)
{
+ struct tc_u_common *tp_c = tp->data;
struct tc_u_knode *n;
unsigned int h;
@@ -583,6 +587,7 @@ static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht,
while ((n = rtnl_dereference(ht->ht[h])) != NULL) {
RCU_INIT_POINTER(ht->ht[h],
rtnl_dereference(n->next));
+ tp_c->knodes--;
tcf_unbind_filter(tp, &n->res);
u32_remove_hw_knode(tp, n, extack);
idr_remove(&ht->handle_idr, n->handle);
@@ -1141,6 +1146,7 @@ static int u32_change(struct net *net, struct sk_buff *in_skb,
RCU_INIT_POINTER(n->next, pins);
rcu_assign_pointer(*ins, n);
+ tp_c->knodes++;
*arg = n;
return 0;
}