luck/tmp_suning_uos_patched
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geneve: Remove workqueue.

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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 <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jesse Gross 2015-01-02 18:26:02 -08:00 committed by David S. Miller
parent 7beceebf5b
commit 61f3cade76
2 changed files with 2 additions and 20 deletions
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1
include/net/geneve.h
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@ -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;

21
net/ipv4/geneve.c
View File

@ -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 @@ static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
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);