aboutsummaryrefslogtreecommitdiffstats
path: root/net/sched/cls_flower.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/sched/cls_flower.c')
-rw-r--r--net/sched/cls_flower.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 92478bb122d3..db47828ea5e2 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -88,6 +88,7 @@ struct fl_flow_tmplt {
struct cls_fl_head {
struct rhashtable ht;
+ spinlock_t masks_lock; /* Protect masks list */
struct list_head masks;
struct rcu_work rwork;
struct idr handle_idr;
@@ -312,6 +313,7 @@ static int fl_init(struct tcf_proto *tp)
if (!head)
return -ENOBUFS;
+ spin_lock_init(&head->masks_lock);
INIT_LIST_HEAD_RCU(&head->masks);
rcu_assign_pointer(tp->root, head);
idr_init(&head->handle_idr);
@@ -341,7 +343,11 @@ static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask,
return false;
rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
+
+ spin_lock(&head->masks_lock);
list_del_rcu(&mask->list);
+ spin_unlock(&head->masks_lock);
+
if (async)
tcf_queue_work(&mask->rwork, fl_mask_free_work);
else
@@ -1312,7 +1318,9 @@ static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
/* Wait until any potential concurrent users of mask are finished */
synchronize_rcu();
+ spin_lock(&head->masks_lock);
list_add_tail_rcu(&newmask->list, &head->masks);
+ spin_unlock(&head->masks_lock);
return newmask;