From 61f3cade763dca46127146a52d829e30b8f48921 Mon Sep 17 00:00:00 2001 From: Jesse Gross Date: Fri, 2 Jan 2015 18:26:02 -0800 Subject: [PATCH] geneve: Remove workqueue. The work queue is used only to free the UDP socket upon destruction. This is not necessary with Geneve and generally makes the code more difficult to reason about. It also introduces nondeterministic behavior such as when a socket is rapidly deleted and recreated, which could fail as the the deletion happens asynchronously. Signed-off-by: Jesse Gross Signed-off-by: David S. Miller --- include/net/geneve.h | 1 - net/ipv4/geneve.c | 21 ++------------------- 2 files changed, 2 insertions(+), 20 deletions(-) diff --git a/include/net/geneve.h b/include/net/geneve.h index 112132cf8e2e..56c7e1ac216a 100644 --- a/include/net/geneve.h +++ b/include/net/geneve.h @@ -71,7 +71,6 @@ struct geneve_sock { struct hlist_node hlist; geneve_rcv_t *rcv; void *rcv_data; - struct work_struct del_work; struct socket *sock; struct rcu_head rcu; atomic_t refcnt; diff --git a/net/ipv4/geneve.c b/net/ipv4/geneve.c index 19e256e1dd92..136a829e8746 100644 --- a/net/ipv4/geneve.c +++ b/net/ipv4/geneve.c @@ -61,8 +61,6 @@ struct geneve_net { static int geneve_net_id; -static struct workqueue_struct *geneve_wq; - static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) { return (struct genevehdr *)(udp_hdr(skb) + 1); @@ -307,15 +305,6 @@ error: return 1; } -static void geneve_del_work(struct work_struct *work) -{ - struct geneve_sock *gs = container_of(work, struct geneve_sock, - del_work); - - udp_tunnel_sock_release(gs->sock); - kfree_rcu(gs, rcu); -} - static struct socket *geneve_create_sock(struct net *net, bool ipv6, __be16 port) { @@ -356,8 +345,6 @@ static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, if (!gs) return ERR_PTR(-ENOMEM); - INIT_WORK(&gs->del_work, geneve_del_work); - sock = geneve_create_sock(net, ipv6, port); if (IS_ERR(sock)) { kfree(gs); @@ -430,7 +417,8 @@ void geneve_sock_release(struct geneve_sock *gs) geneve_notify_del_rx_port(gs); spin_unlock(&gn->sock_lock); - queue_work(geneve_wq, &gs->del_work); + udp_tunnel_sock_release(gs->sock); + kfree_rcu(gs, rcu); } EXPORT_SYMBOL_GPL(geneve_sock_release); @@ -458,10 +446,6 @@ static int __init geneve_init_module(void) { int rc; - geneve_wq = alloc_workqueue("geneve", 0, 0); - if (!geneve_wq) - return -ENOMEM; - rc = register_pernet_subsys(&geneve_net_ops); if (rc) return rc; @@ -474,7 +458,6 @@ late_initcall(geneve_init_module); static void __exit geneve_cleanup_module(void) { - destroy_workqueue(geneve_wq); unregister_pernet_subsys(&geneve_net_ops); } module_exit(geneve_cleanup_module);