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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 1b0e3ee4ddd8..2a1c06874c42 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -3,6 +3,7 @@
3 3
4#include <linux/genetlink.h> 4#include <linux/genetlink.h>
5#include <net/netlink.h> 5#include <net/netlink.h>
6#include <net/net_namespace.h>
6 7
7/** 8/**
8 * struct genl_multicast_group - generic netlink multicast group 9 * struct genl_multicast_group - generic netlink multicast group
@@ -27,6 +28,8 @@ struct genl_multicast_group
27 * @name: name of family 28 * @name: name of family
28 * @version: protocol version 29 * @version: protocol version
29 * @maxattr: maximum number of attributes supported 30 * @maxattr: maximum number of attributes supported
31 * @netnsok: set to true if the family can handle network
32 * namespaces and should be presented in all of them
30 * @attrbuf: buffer to store parsed attributes 33 * @attrbuf: buffer to store parsed attributes
31 * @ops_list: list of all assigned operations 34 * @ops_list: list of all assigned operations
32 * @family_list: family list 35 * @family_list: family list
@@ -39,6 +42,7 @@ struct genl_family
39 char name[GENL_NAMSIZ]; 42 char name[GENL_NAMSIZ];
40 unsigned int version; 43 unsigned int version;
41 unsigned int maxattr; 44 unsigned int maxattr;
45 bool netnsok;
42 struct nlattr ** attrbuf; /* private */ 46 struct nlattr ** attrbuf; /* private */
43 struct list_head ops_list; /* private */ 47 struct list_head ops_list; /* private */
44 struct list_head family_list; /* private */ 48 struct list_head family_list; /* private */
@@ -62,8 +66,32 @@ struct genl_info
62 struct genlmsghdr * genlhdr; 66 struct genlmsghdr * genlhdr;
63 void * userhdr; 67 void * userhdr;
64 struct nlattr ** attrs; 68 struct nlattr ** attrs;
69#ifdef CONFIG_NET_NS
70 struct net * _net;
71#endif
65}; 72};
66 73
74#ifdef CONFIG_NET_NS
75static inline struct net *genl_info_net(struct genl_info *info)
76{
77 return info->_net;
78}
79
80static inline void genl_info_net_set(struct genl_info *info, struct net *net)
81{
82 info->_net = net;
83}
84#else
85static inline struct net *genl_info_net(struct genl_info *info)
86{
87 return &init_net;
88}
89
90static inline void genl_info_net_set(struct genl_info *info, struct net *net)
91{
92}
93#endif
94
67/** 95/**
68 * struct genl_ops - generic netlink operations 96 * struct genl_ops - generic netlink operations
69 * @cmd: command identifier 97 * @cmd: command identifier
@@ -98,8 +126,6 @@ extern int genl_register_mc_group(struct genl_family *family,
98extern void genl_unregister_mc_group(struct genl_family *family, 126extern void genl_unregister_mc_group(struct genl_family *family,
99 struct genl_multicast_group *grp); 127 struct genl_multicast_group *grp);
100 128
101extern struct sock *genl_sock;
102
103/** 129/**
104 * genlmsg_put - Add generic netlink header to netlink message 130 * genlmsg_put - Add generic netlink header to netlink message
105 * @skb: socket buffer holding the message 131 * @skb: socket buffer holding the message
@@ -170,7 +196,21 @@ static inline void genlmsg_cancel(struct sk_buff *skb, void *hdr)
170} 196}
171 197
172/** 198/**
173 * genlmsg_multicast - multicast a netlink message 199 * genlmsg_multicast_netns - multicast a netlink message to a specific netns
200 * @net: the net namespace
201 * @skb: netlink message as socket buffer
202 * @pid: own netlink pid to avoid sending to yourself
203 * @group: multicast group id
204 * @flags: allocation flags
205 */
206static inline int genlmsg_multicast_netns(struct net *net, struct sk_buff *skb,
207 u32 pid, unsigned int group, gfp_t flags)
208{
209 return nlmsg_multicast(net->genl_sock, skb, pid, group, flags);
210}
211
212/**
213 * genlmsg_multicast - multicast a netlink message to the default netns
174 * @skb: netlink message as socket buffer 214 * @skb: netlink message as socket buffer
175 * @pid: own netlink pid to avoid sending to yourself 215 * @pid: own netlink pid to avoid sending to yourself
176 * @group: multicast group id 216 * @group: multicast group id
@@ -179,17 +219,29 @@ static inline void genlmsg_cancel(struct sk_buff *skb, void *hdr)
179static inline int genlmsg_multicast(struct sk_buff *skb, u32 pid, 219static inline int genlmsg_multicast(struct sk_buff *skb, u32 pid,
180 unsigned int group, gfp_t flags) 220 unsigned int group, gfp_t flags)
181{ 221{
182 return nlmsg_multicast(genl_sock, skb, pid, group, flags); 222 return genlmsg_multicast_netns(&init_net, skb, pid, group, flags);
183} 223}
184 224
185/** 225/**
226 * genlmsg_multicast_allns - multicast a netlink message to all net namespaces
227 * @skb: netlink message as socket buffer
228 * @pid: own netlink pid to avoid sending to yourself
229 * @group: multicast group id
230 * @flags: allocation flags
231 *
232 * This function must hold the RTNL or rcu_read_lock().
233 */
234int genlmsg_multicast_allns(struct sk_buff *skb, u32 pid,
235 unsigned int group, gfp_t flags);
236
237/**
186 * genlmsg_unicast - unicast a netlink message 238 * genlmsg_unicast - unicast a netlink message
187 * @skb: netlink message as socket buffer 239 * @skb: netlink message as socket buffer
188 * @pid: netlink pid of the destination socket 240 * @pid: netlink pid of the destination socket
189 */ 241 */
190static inline int genlmsg_unicast(struct sk_buff *skb, u32 pid) 242static inline int genlmsg_unicast(struct net *net, struct sk_buff *skb, u32 pid)
191{ 243{
192 return nlmsg_unicast(genl_sock, skb, pid); 244 return nlmsg_unicast(net->genl_sock, skb, pid);
193} 245}
194 246
195/** 247/**
@@ -199,7 +251,7 @@ static inline int genlmsg_unicast(struct sk_buff *skb, u32 pid)
199 */ 251 */
200static inline int genlmsg_reply(struct sk_buff *skb, struct genl_info *info) 252static inline int genlmsg_reply(struct sk_buff *skb, struct genl_info *info)
201{ 253{
202 return genlmsg_unicast(skb, info->snd_pid); 254 return genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
203} 255}
204 256
205/** 257/**