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-rw-r--r--include/net/genetlink.h66
1 files changed, 59 insertions, 7 deletions
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index 1b0e3ee..2a1c0687 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -3,6 +3,7 @@
#include <linux/genetlink.h>
#include <net/netlink.h>
+#include <net/net_namespace.h>
/**
* struct genl_multicast_group - generic netlink multicast group
@@ -27,6 +28,8 @@ struct genl_multicast_group
* @name: name of family
* @version: protocol version
* @maxattr: maximum number of attributes supported
+ * @netnsok: set to true if the family can handle network
+ * namespaces and should be presented in all of them
* @attrbuf: buffer to store parsed attributes
* @ops_list: list of all assigned operations
* @family_list: family list
@@ -39,6 +42,7 @@ struct genl_family
char name[GENL_NAMSIZ];
unsigned int version;
unsigned int maxattr;
+ bool netnsok;
struct nlattr ** attrbuf; /* private */
struct list_head ops_list; /* private */
struct list_head family_list; /* private */
@@ -62,8 +66,32 @@ struct genl_info
struct genlmsghdr * genlhdr;
void * userhdr;
struct nlattr ** attrs;
+#ifdef CONFIG_NET_NS
+ struct net * _net;
+#endif
};
+#ifdef CONFIG_NET_NS
+static inline struct net *genl_info_net(struct genl_info *info)
+{
+ return info->_net;
+}
+
+static inline void genl_info_net_set(struct genl_info *info, struct net *net)
+{
+ info->_net = net;
+}
+#else
+static inline struct net *genl_info_net(struct genl_info *info)
+{
+ return &init_net;
+}
+
+static inline void genl_info_net_set(struct genl_info *info, struct net *net)
+{
+}
+#endif
+
/**
* struct genl_ops - generic netlink operations
* @cmd: command identifier
@@ -98,8 +126,6 @@ extern int genl_register_mc_group(struct genl_family *family,
extern void genl_unregister_mc_group(struct genl_family *family,
struct genl_multicast_group *grp);
-extern struct sock *genl_sock;
-
/**
* genlmsg_put - Add generic netlink header to netlink message
* @skb: socket buffer holding the message
@@ -170,7 +196,21 @@ static inline void genlmsg_cancel(struct sk_buff *skb, void *hdr)
}
/**
- * genlmsg_multicast - multicast a netlink message
+ * genlmsg_multicast_netns - multicast a netlink message to a specific netns
+ * @net: the net namespace
+ * @skb: netlink message as socket buffer
+ * @pid: own netlink pid to avoid sending to yourself
+ * @group: multicast group id
+ * @flags: allocation flags
+ */
+static inline int genlmsg_multicast_netns(struct net *net, struct sk_buff *skb,
+ u32 pid, unsigned int group, gfp_t flags)
+{
+ return nlmsg_multicast(net->genl_sock, skb, pid, group, flags);
+}
+
+/**
+ * genlmsg_multicast - multicast a netlink message to the default netns
* @skb: netlink message as socket buffer
* @pid: own netlink pid to avoid sending to yourself
* @group: multicast group id
@@ -179,17 +219,29 @@ static inline void genlmsg_cancel(struct sk_buff *skb, void *hdr)
static inline int genlmsg_multicast(struct sk_buff *skb, u32 pid,
unsigned int group, gfp_t flags)
{
- return nlmsg_multicast(genl_sock, skb, pid, group, flags);
+ return genlmsg_multicast_netns(&init_net, skb, pid, group, flags);
}
/**
+ * genlmsg_multicast_allns - multicast a netlink message to all net namespaces
+ * @skb: netlink message as socket buffer
+ * @pid: own netlink pid to avoid sending to yourself
+ * @group: multicast group id
+ * @flags: allocation flags
+ *
+ * This function must hold the RTNL or rcu_read_lock().
+ */
+int genlmsg_multicast_allns(struct sk_buff *skb, u32 pid,
+ unsigned int group, gfp_t flags);
+
+/**
* genlmsg_unicast - unicast a netlink message
* @skb: netlink message as socket buffer
* @pid: netlink pid of the destination socket
*/
-static inline int genlmsg_unicast(struct sk_buff *skb, u32 pid)
+static inline int genlmsg_unicast(struct net *net, struct sk_buff *skb, u32 pid)
{
- return nlmsg_unicast(genl_sock, skb, pid);
+ return nlmsg_unicast(net->genl_sock, skb, pid);
}
/**
@@ -199,7 +251,7 @@ static inline int genlmsg_unicast(struct sk_buff *skb, u32 pid)
*/
static inline int genlmsg_reply(struct sk_buff *skb, struct genl_info *info)
{
- return genlmsg_unicast(skb, info->snd_pid);
+ return genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
}
/**
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