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authorDenis V. Lunev <den@openvz.org>2007-12-01 00:21:31 +1100
committerDavid S. Miller <davem@davemloft.net>2008-01-28 14:54:24 -0800
commitb854272b3c732316676e9128f7b9e6f1e1ff88b0 (patch)
treec90c74b9ec068453881f1173da4c57d6bb00a7d9 /net/sched/sch_api.c
parentad5d20a63940fcfb40af76ba06148f36d5d0b433 (diff)
[NET]: Modify all rtnetlink methods to only work in the initial namespace (v2)
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>
Diffstat (limited to 'net/sched/sch_api.c')
-rw-r--r--net/sched/sch_api.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 259321be1ad..f30e3f7ad88 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -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)