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authorEric W. Biederman <ebiederm@xmission.com>2007-10-08 23:24:22 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:49:07 -0700
commit1b8d7ae42d02e483ad94035cca851e4f7fbecb40 (patch)
tree81f8cc0ee49ef99cc67dfed3dc7b7ecb510abf8b /net/atm
parent457c4cbc5a3dde259d2a1f15d5f9785290397267 (diff)
downloadlinux-2.6.38-lt-ux500-1b8d7ae42d02e483ad94035cca851e4f7fbecb40.tar.gz
[NET]: Make socket creation namespace safe.
This patch passes in the namespace a new socket should be created in and has the socket code do the appropriate reference counting. By virtue of this all socket create methods are touched. In addition the socket create methods are modified so that they will fail if you attempt to create a socket in a non-default network namespace. Failing if we attempt to create a socket outside of the default network namespace ensures that as we incrementally make the network stack network namespace aware we will not export functionality that someone has not audited and made certain is network namespace safe. Allowing us to partially enable network namespaces before all of the exotic protocols are supported. Any protocol layers I have missed will fail to compile because I now pass an extra parameter into the socket creation code. [ Integrated AF_IUCV build fixes from Andrew Morton... -DaveM ] Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/atm')
-rw-r--r--net/atm/common.c4
-rw-r--r--net/atm/common.h2
-rw-r--r--net/atm/pvc.c7
-rw-r--r--net/atm/svc.c11
4 files changed, 15 insertions, 9 deletions
diff --git a/net/atm/common.c b/net/atm/common.c
index 299ec1eb872..e166d9e0ffd 100644
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -125,7 +125,7 @@ static struct proto vcc_proto = {
.obj_size = sizeof(struct atm_vcc),
};
-int vcc_create(struct socket *sock, int protocol, int family)
+int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
{
struct sock *sk;
struct atm_vcc *vcc;
@@ -133,7 +133,7 @@ int vcc_create(struct socket *sock, int protocol, int family)
sock->sk = NULL;
if (sock->type == SOCK_STREAM)
return -EINVAL;
- sk = sk_alloc(family, GFP_KERNEL, &vcc_proto, 1);
+ sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto, 1);
if (!sk)
return -ENOMEM;
sock_init_data(sock, sk);
diff --git a/net/atm/common.h b/net/atm/common.h
index ad78c9e1117..16f32c1fa1c 100644
--- a/net/atm/common.h
+++ b/net/atm/common.h
@@ -10,7 +10,7 @@
#include <linux/poll.h> /* for poll_table */
-int vcc_create(struct socket *sock, int protocol, int family);
+int vcc_create(struct net *net, struct socket *sock, int protocol, int family);
int vcc_release(struct socket *sock);
int vcc_connect(struct socket *sock, int itf, short vpi, int vci);
int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
diff --git a/net/atm/pvc.c b/net/atm/pvc.c
index 848e6e191cc..43e8bf5ed00 100644
--- a/net/atm/pvc.c
+++ b/net/atm/pvc.c
@@ -124,10 +124,13 @@ static const struct proto_ops pvc_proto_ops = {
};
-static int pvc_create(struct socket *sock,int protocol)
+static int pvc_create(struct net *net, struct socket *sock,int protocol)
{
+ if (net != &init_net)
+ return -EAFNOSUPPORT;
+
sock->ops = &pvc_proto_ops;
- return vcc_create(sock, protocol, PF_ATMPVC);
+ return vcc_create(net, sock, protocol, PF_ATMPVC);
}
diff --git a/net/atm/svc.c b/net/atm/svc.c
index 53d04c7992c..daf9a48a7db 100644
--- a/net/atm/svc.c
+++ b/net/atm/svc.c
@@ -25,7 +25,7 @@
#include "signaling.h"
#include "addr.h"
-static int svc_create(struct socket *sock,int protocol);
+static int svc_create(struct net *net, struct socket *sock,int protocol);
/*
* Note: since all this is still nicely synchronized with the signaling demon,
@@ -326,7 +326,7 @@ static int svc_accept(struct socket *sock,struct socket *newsock,int flags)
lock_sock(sk);
- error = svc_create(newsock,0);
+ error = svc_create(sk->sk_net, newsock,0);
if (error)
goto out;
@@ -627,12 +627,15 @@ static const struct proto_ops svc_proto_ops = {
};
-static int svc_create(struct socket *sock,int protocol)
+static int svc_create(struct net *net, struct socket *sock,int protocol)
{
int error;
+ if (net != &init_net)
+ return -EAFNOSUPPORT;
+
sock->ops = &svc_proto_ops;
- error = vcc_create(sock, protocol, AF_ATMSVC);
+ error = vcc_create(net, sock, protocol, AF_ATMSVC);
if (error) return error;
ATM_SD(sock)->local.sas_family = AF_ATMSVC;
ATM_SD(sock)->remote.sas_family = AF_ATMSVC;