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[NET]: Modify all rtnetlink methods to only work in the initial namespace (v2)

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Before I can enable rtnetlink to work in all network namespaces I need
to be certain that something won't break.  So this patch deliberately
disables all of the rtnletlink methods in everything except the
initial network namespace.  After the methods have been audited this
extra check can be disabled.

Changes from v1:
- added IPv6 addrlabel protection

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Denis V. Lunev
2007-12-01 00:21:31 +11:00
committed by David S. Miller
parent ad5d20a639
commit b854272b3c
18 changed files with 218 additions and 1 deletions
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21
net/sched/sch_api.c
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@@ -29,6 +29,7 @@
#include <linux/hrtimer.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
@@ -599,6 +600,7 @@ check_loop_fn(struct Qdisc *q, unsigned long cl, struct qdisc_walker *w)
static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
{
struct net *net = skb->sk->sk_net;
struct tcmsg *tcm = NLMSG_DATA(n);
struct rtattr **tca = arg;
struct net_device *dev;
@@ -607,6 +609,9 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
struct Qdisc *p = NULL;
int err;
if (net != &init_net)
return -EINVAL;
if ((dev = __dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL)
return -ENODEV;
@@ -660,6 +665,7 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
{
struct net *net = skb->sk->sk_net;
struct tcmsg *tcm;
struct rtattr **tca;
struct net_device *dev;
@@ -667,6 +673,9 @@ static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
struct Qdisc *q, *p;
int err;
if (net != &init_net)
return -EINVAL;
replay:
/* Reinit, just in case something touches this. */
tcm = NLMSG_DATA(n);
@@ -872,11 +881,15 @@ err_out:
static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = skb->sk->sk_net;
int idx, q_idx;
int s_idx, s_q_idx;
struct net_device *dev;
struct Qdisc *q;
if (net != &init_net)
return 0;
s_idx = cb->args[0];
s_q_idx = q_idx = cb->args[1];
read_lock(&dev_base_lock);
@@ -920,6 +933,7 @@ done:
static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
{
struct net *net = skb->sk->sk_net;
struct tcmsg *tcm = NLMSG_DATA(n);
struct rtattr **tca = arg;
struct net_device *dev;
@@ -932,6 +946,9 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
u32 qid = TC_H_MAJ(clid);
int err;
if (net != &init_net)
return -EINVAL;
if ((dev = __dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL)
return -ENODEV;
@@ -1106,6 +1123,7 @@ static int qdisc_class_dump(struct Qdisc *q, unsigned long cl, struct qdisc_walk
static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = skb->sk->sk_net;
int t;
int s_t;
struct net_device *dev;
@@ -1113,6 +1131,9 @@ static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
struct tcmsg *tcm = (struct tcmsg*)NLMSG_DATA(cb->nlh);
struct qdisc_dump_args arg;
if (net != &init_net)
return 0;
if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm)))
return 0;
if ((dev = dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL)