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net: kill sk_change_net and sk_release_kernel 

These functions are no longer needed and no longer used kill them.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2015-05-08 21:12:13 -05:00 committed by David S. Miller
parent 13d3078e22
commit affb9792f1
2 changed files with 0 additions and 36 deletions
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17
include/net/sock.h
View File

@ -1518,7 +1518,6 @@ static inline void unlock_sock_fast(struct sock *sk, bool slow)
struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
struct proto *prot, int kern);
void sk_free(struct sock *sk);
void sk_release_kernel(struct sock *sk);
struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority);
struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force,
@ -2194,22 +2193,6 @@ void sock_net_set(struct sock *sk, struct net *net)
write_pnet(&sk->sk_net, net);
}
/*
* Kernel sockets, f.e. rtnl or icmp_socket, are a part of a namespace.
* They should not hold a reference to a namespace in order to allow
* to stop it.
* Sockets after sk_change_net should be released using sk_release_kernel
*/
static inline void sk_change_net(struct sock *sk, struct net *net)
{
struct net *current_net = sock_net(sk);
if (!net_eq(current_net, net)) {
put_net(current_net);
sock_net_set(sk, net);
}
}
static inline struct sock *skb_steal_sock(struct sk_buff *skb)
{
if (skb->sk) {

19
net/core/sock.c
View File

@ -1466,25 +1466,6 @@ void sk_free(struct sock *sk)
}
EXPORT_SYMBOL(sk_free);
/*
* Last sock_put should drop reference to sk->sk_net. It has already
* been dropped in sk_change_net. Taking reference to stopping namespace
* is not an option.
* Take reference to a socket to remove it from hash _alive_ and after that
* destroy it in the context of init_net.
*/
void sk_release_kernel(struct sock *sk)
{
if (sk == NULL || sk->sk_socket == NULL)
return;
sock_hold(sk);
sock_net_set(sk, get_net(&init_net));
sock_release(sk->sk_socket);
sock_put(sk);
}
EXPORT_SYMBOL(sk_release_kernel);
static void sk_update_clone(const struct sock *sk, struct sock *newsk)
{
if (mem_cgroup_sockets_enabled && sk->sk_cgrp)