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authorEric W. Biederman <ebiederm@xmission.com>2007-09-17 11:56:21 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:49:10 -0700
commit881d966b48b035ab3f3aeaae0f3d3f9b584f45b2 (patch)
treec579d59a4107cbbe9e2b85939bc0d496b815c887 /include/net
parentb4b510290b056b86611757ce1175a230f1080f53 (diff)
[NET]: Make the device list and device lookups per namespace.
This patch makes most of the generic device layer network namespace safe. This patch makes dev_base_head a network namespace variable, and then it picks up a few associated variables. The functions: dev_getbyhwaddr dev_getfirsthwbytype dev_get_by_flags dev_get_by_name __dev_get_by_name dev_get_by_index __dev_get_by_index dev_ioctl dev_ethtool dev_load wireless_process_ioctl were modified to take a network namespace argument, and deal with it. vlan_ioctl_set and brioctl_set were modified so their hooks will receive a network namespace argument. So basically anthing in the core of the network stack that was affected to by the change of dev_base was modified to handle multiple network namespaces. The rest of the network stack was simply modified to explicitly use &init_net the initial network namespace. This can be fixed when those components of the network stack are modified to handle multiple network namespaces. For now the ifindex generator is left global. Fundametally ifindex numbers are per namespace, or else we will have corner case problems with migration when we get that far. At the same time there are assumptions in the network stack that the ifindex of a network device won't change. Making the ifindex number global seems a good compromise until the network stack can cope with ifindex changes when you change namespaces, and the like. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/net_namespace.h4
-rw-r--r--include/net/pkt_cls.h3
-rw-r--r--include/net/rtnetlink.h2
-rw-r--r--include/net/wext.h15
4 files changed, 18 insertions, 6 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 54724768134..fac42db7f6d 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -22,6 +22,10 @@ struct net {
struct proc_dir_entry *proc_net;
struct proc_dir_entry *proc_net_stat;
struct proc_dir_entry *proc_net_root;
+
+ struct list_head dev_base_head;
+ struct hlist_head *dev_name_head;
+ struct hlist_head *dev_index_head;
};
extern struct net init_net;
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index 7968b1d6636..f285de69c61 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -2,6 +2,7 @@
#define __NET_PKT_CLS_H
#include <linux/pkt_cls.h>
+#include <net/net_namespace.h>
#include <net/sch_generic.h>
#include <net/act_api.h>
@@ -351,7 +352,7 @@ tcf_match_indev(struct sk_buff *skb, char *indev)
if (indev[0]) {
if (!skb->iif)
return 0;
- dev = __dev_get_by_index(skb->iif);
+ dev = __dev_get_by_index(&init_net, skb->iif);
if (!dev || strcmp(indev, dev->name))
return 0;
}
diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h
index 8218288ab7e..793863e09c6 100644
--- a/include/net/rtnetlink.h
+++ b/include/net/rtnetlink.h
@@ -78,7 +78,7 @@ extern void __rtnl_link_unregister(struct rtnl_link_ops *ops);
extern int rtnl_link_register(struct rtnl_link_ops *ops);
extern void rtnl_link_unregister(struct rtnl_link_ops *ops);
-extern struct net_device *rtnl_create_link(char *ifname,
+extern struct net_device *rtnl_create_link(struct net *net, char *ifname,
const struct rtnl_link_ops *ops, struct nlattr *tb[]);
extern const struct nla_policy ifla_policy[IFLA_MAX+1];
diff --git a/include/net/wext.h b/include/net/wext.h
index c02b8decf3a..80b31d826b7 100644
--- a/include/net/wext.h
+++ b/include/net/wext.h
@@ -5,16 +5,23 @@
* wireless extensions interface to the core code
*/
+struct net;
+
#ifdef CONFIG_WIRELESS_EXT
-extern int wext_proc_init(void);
-extern int wext_handle_ioctl(struct ifreq *ifr, unsigned int cmd,
+extern int wext_proc_init(struct net *net);
+extern void wext_proc_exit(struct net *net);
+extern int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,
void __user *arg);
#else
-static inline int wext_proc_init(void)
+static inline int wext_proc_init(struct net *net)
{
return 0;
}
-static inline int wext_handle_ioctl(struct ifreq *ifr, unsigned int cmd,
+static inline void wext_proc_exit(struct net *net)
+{
+ return;
+}
+static inline int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,
void __user *arg)
{
return -EINVAL;