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-rw-r--r--drivers/net/tun.c24
-rw-r--r--include/linux/net.h1
-rw-r--r--net/socket.c3
3 files changed, 4 insertions, 24 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index e470ae59d405..3262f3e2b8b2 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -146,7 +146,6 @@ struct tun_file {
struct socket socket;
struct socket_wq wq;
struct tun_struct __rcu *tun;
- struct net *net;
struct fasync_struct *fasync;
/* only used for fasnyc */
unsigned int flags;
@@ -493,10 +492,7 @@ static void __tun_detach(struct tun_file *tfile, bool clean)
tun->dev->reg_state == NETREG_REGISTERED)
unregister_netdevice(tun->dev);
}
-
- BUG_ON(!test_bit(SOCK_EXTERNALLY_ALLOCATED,
- &tfile->socket.flags));
- sk_release_kernel(&tfile->sk);
+ sock_put(&tfile->sk);
}
}
@@ -1492,18 +1488,10 @@ out:
return ret;
}
-static int tun_release(struct socket *sock)
-{
- if (sock->sk)
- sock_put(sock->sk);
- return 0;
-}
-
/* Ops structure to mimic raw sockets with tun */
static const struct proto_ops tun_socket_ops = {
.sendmsg = tun_sendmsg,
.recvmsg = tun_recvmsg,
- .release = tun_release,
};
static struct proto tun_proto = {
@@ -1865,7 +1853,7 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
if (cmd == TUNSETIFF && !tun) {
ifr.ifr_name[IFNAMSIZ-1] = '\0';
- ret = tun_set_iff(tfile->net, file, &ifr);
+ ret = tun_set_iff(sock_net(&tfile->sk), file, &ifr);
if (ret)
goto unlock;
@@ -2154,16 +2142,16 @@ out:
static int tun_chr_open(struct inode *inode, struct file * file)
{
+ struct net *net = current->nsproxy->net_ns;
struct tun_file *tfile;
DBG1(KERN_INFO, "tunX: tun_chr_open\n");
- tfile = (struct tun_file *)sk_alloc(&init_net, AF_UNSPEC, GFP_KERNEL,
+ tfile = (struct tun_file *)sk_alloc(net, AF_UNSPEC, GFP_KERNEL,
&tun_proto);
if (!tfile)
return -ENOMEM;
RCU_INIT_POINTER(tfile->tun, NULL);
- tfile->net = get_net(current->nsproxy->net_ns);
tfile->flags = 0;
tfile->ifindex = 0;
@@ -2174,13 +2162,11 @@ static int tun_chr_open(struct inode *inode, struct file * file)
tfile->socket.ops = &tun_socket_ops;
sock_init_data(&tfile->socket, &tfile->sk);
- sk_change_net(&tfile->sk, tfile->net);
tfile->sk.sk_write_space = tun_sock_write_space;
tfile->sk.sk_sndbuf = INT_MAX;
file->private_data = tfile;
- set_bit(SOCK_EXTERNALLY_ALLOCATED, &tfile->socket.flags);
INIT_LIST_HEAD(&tfile->next);
sock_set_flag(&tfile->sk, SOCK_ZEROCOPY);
@@ -2191,10 +2177,8 @@ static int tun_chr_open(struct inode *inode, struct file * file)
static int tun_chr_close(struct inode *inode, struct file *file)
{
struct tun_file *tfile = file->private_data;
- struct net *net = tfile->net;
tun_detach(tfile, true);
- put_net(net);
return 0;
}
diff --git a/include/linux/net.h b/include/linux/net.h
index 738ea48be889..8a5e81d2bdf7 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -38,7 +38,6 @@ struct net;
#define SOCK_NOSPACE 2
#define SOCK_PASSCRED 3
#define SOCK_PASSSEC 4
-#define SOCK_EXTERNALLY_ALLOCATED 5
#ifndef ARCH_HAS_SOCKET_TYPES
/**
diff --git a/net/socket.c b/net/socket.c
index 884e32997698..b5f1f43ed8f4 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -576,9 +576,6 @@ void sock_release(struct socket *sock)
if (rcu_dereference_protected(sock->wq, 1)->fasync_list)
pr_err("%s: fasync list not empty!\n", __func__);
- if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags))
- return;
-
this_cpu_sub(sockets_in_use, 1);
if (!sock->file) {
iput(SOCK_INODE(sock));