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Message-ID: <1458772618-845742-10-git-send-email-tom@herbertland.com>
Date: Wed, 23 Mar 2016 15:36:58 -0700
From: Tom Herbert <tom@...bertland.com>
To: <davem@...emloft.net>, <netdev@...r.kernel.org>
CC: <kernel-team@...com>
Subject: [PATCH RFC 9/9] udp: Remove udp_offloads
Now that the UDP encapsulation GRO functions have been moved to the UDP
socket we not longer need the udp_offload insfrastructure so removing it.
Signed-off-by: Tom Herbert <tom@...bertland.com>
---
include/linux/netdevice.h | 17 -------------
include/net/protocol.h | 3 ---
net/ipv4/udp_offload.c | 63 -----------------------------------------------
3 files changed, 83 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index be693b3..9262ac9 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2152,23 +2152,6 @@ struct packet_offload {
struct list_head list;
};
-struct udp_offload;
-
-struct udp_offload_callbacks {
- struct sk_buff **(*gro_receive)(struct sk_buff **head,
- struct sk_buff *skb,
- struct udp_offload *uoff);
- int (*gro_complete)(struct sk_buff *skb,
- int nhoff,
- struct udp_offload *uoff);
-};
-
-struct udp_offload {
- __be16 port;
- u8 ipproto;
- struct udp_offload_callbacks callbacks;
-};
-
/* often modified stats are per cpu, other are shared (netdev->stats) */
struct pcpu_sw_netstats {
u64 rx_packets;
diff --git a/include/net/protocol.h b/include/net/protocol.h
index da689f5..bf36ca3 100644
--- a/include/net/protocol.h
+++ b/include/net/protocol.h
@@ -107,9 +107,6 @@ int inet_del_offload(const struct net_offload *prot, unsigned char num);
void inet_register_protosw(struct inet_protosw *p);
void inet_unregister_protosw(struct inet_protosw *p);
-int udp_add_offload(struct net *net, struct udp_offload *prot);
-void udp_del_offload(struct udp_offload *prot);
-
#if IS_ENABLED(CONFIG_IPV6)
int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num);
int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num);
diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c
index dce43c9..320c91e 100644
--- a/net/ipv4/udp_offload.c
+++ b/net/ipv4/udp_offload.c
@@ -14,18 +14,6 @@
#include <net/udp.h>
#include <net/protocol.h>
-static DEFINE_SPINLOCK(udp_offload_lock);
-static struct udp_offload_priv __rcu *udp_offload_base __read_mostly;
-
-#define udp_deref_protected(X) rcu_dereference_protected(X, lockdep_is_held(&udp_offload_lock))
-
-struct udp_offload_priv {
- struct udp_offload *offload;
- possible_net_t net;
- struct rcu_head rcu;
- struct udp_offload_priv __rcu *next;
-};
-
static struct sk_buff *__skb_udp_tunnel_segment(struct sk_buff *skb,
netdev_features_t features,
struct sk_buff *(*gso_inner_segment)(struct sk_buff *skb,
@@ -254,56 +242,6 @@ out:
return segs;
}
-int udp_add_offload(struct net *net, struct udp_offload *uo)
-{
- struct udp_offload_priv *new_offload = kzalloc(sizeof(*new_offload), GFP_ATOMIC);
-
- if (!new_offload)
- return -ENOMEM;
-
- write_pnet(&new_offload->net, net);
- new_offload->offload = uo;
-
- spin_lock(&udp_offload_lock);
- new_offload->next = udp_offload_base;
- rcu_assign_pointer(udp_offload_base, new_offload);
- spin_unlock(&udp_offload_lock);
-
- return 0;
-}
-EXPORT_SYMBOL(udp_add_offload);
-
-static void udp_offload_free_routine(struct rcu_head *head)
-{
- struct udp_offload_priv *ou_priv = container_of(head, struct udp_offload_priv, rcu);
- kfree(ou_priv);
-}
-
-void udp_del_offload(struct udp_offload *uo)
-{
- struct udp_offload_priv __rcu **head = &udp_offload_base;
- struct udp_offload_priv *uo_priv;
-
- spin_lock(&udp_offload_lock);
-
- uo_priv = udp_deref_protected(*head);
- for (; uo_priv != NULL;
- uo_priv = udp_deref_protected(*head)) {
- if (uo_priv->offload == uo) {
- rcu_assign_pointer(*head,
- udp_deref_protected(uo_priv->next));
- goto unlock;
- }
- head = &uo_priv->next;
- }
- pr_warn("udp_del_offload: didn't find offload for port %d\n", ntohs(uo->port));
-unlock:
- spin_unlock(&udp_offload_lock);
- if (uo_priv)
- call_rcu(&uo_priv->rcu, udp_offload_free_routine);
-}
-EXPORT_SYMBOL(udp_del_offload);
-
struct sk_buff **udp_gro_receive(struct sk_buff **head, struct sk_buff *skb,
struct udphdr *uh, udp_lookup_t lookup)
{
@@ -327,7 +265,6 @@ struct sk_buff **udp_gro_receive(struct sk_buff **head, struct sk_buff *skb,
if (sk && udp_sk(sk)->gro_receive)
goto unflush;
-
goto out_unlock;
unflush:
--
2.8.0.rc2
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