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-rw-r--r--include/linux/connector.h3
-rw-r--r--include/linux/netlink.h6
-rw-r--r--include/net/genetlink.h46
-rw-r--r--include/net/netlink.h31
-rw-r--r--include/uapi/linux/devlink.h2
5 files changed, 76 insertions, 12 deletions
diff --git a/include/linux/connector.h b/include/linux/connector.h
index cec2d99ae902..70bc1160f3d8 100644
--- a/include/linux/connector.h
+++ b/include/linux/connector.h
@@ -100,8 +100,7 @@ void cn_del_callback(const struct cb_id *id);
*/
int cn_netlink_send_mult(struct cn_msg *msg, u16 len, u32 portid,
u32 group, gfp_t gfp_mask,
- int (*filter)(struct sock *dsk, struct sk_buff *skb,
- void *data),
+ netlink_filter_fn filter,
void *filter_data);
/**
diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index abe91ed6b9aa..1a4445bf2ab9 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -228,10 +228,12 @@ bool netlink_strict_get_check(struct sk_buff *skb);
int netlink_unicast(struct sock *ssk, struct sk_buff *skb, __u32 portid, int nonblock);
int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 portid,
__u32 group, gfp_t allocation);
+
+typedef int (*netlink_filter_fn)(struct sock *dsk, struct sk_buff *skb, void *data);
+
int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb,
__u32 portid, __u32 group, gfp_t allocation,
- int (*filter)(struct sock *dsk,
- struct sk_buff *skb, void *data),
+ netlink_filter_fn filter,
void *filter_data);
int netlink_set_err(struct sock *ssk, __u32 portid, __u32 group, int code);
int netlink_register_notifier(struct notifier_block *nb);
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index c53244f20437..85c63d4f16dd 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -51,6 +51,9 @@ struct genl_info;
* @split_ops: the split do/dump form of operation definition
* @n_split_ops: number of entries in @split_ops, not that with split do/dump
* ops the number of entries is not the same as number of commands
+ * @sock_priv_size: the size of per-socket private memory
+ * @sock_priv_init: the per-socket private memory initializer
+ * @sock_priv_destroy: the per-socket private memory destructor
*
* Attribute policies (the combination of @policy and @maxattr fields)
* can be attached at the family level or at the operation level.
@@ -84,11 +87,17 @@ struct genl_family {
const struct genl_multicast_group *mcgrps;
struct module *module;
+ size_t sock_priv_size;
+ void (*sock_priv_init)(void *priv);
+ void (*sock_priv_destroy)(void *priv);
+
/* private: internal use only */
/* protocol family identifier */
int id;
/* starting number of multicast group IDs in this family */
unsigned int mcgrp_offset;
+ /* list of per-socket privs */
+ struct xarray *sock_privs;
};
/**
@@ -298,6 +307,8 @@ static inline bool genl_info_is_ntf(const struct genl_info *info)
return !info->nlhdr;
}
+void *__genl_sk_priv_get(struct genl_family *family, struct sock *sk);
+void *genl_sk_priv_get(struct genl_family *family, struct sock *sk);
int genl_register_family(struct genl_family *family);
int genl_unregister_family(const struct genl_family *family);
void genl_notify(const struct genl_family *family, struct sk_buff *skb,
@@ -438,6 +449,35 @@ static inline void genlmsg_cancel(struct sk_buff *skb, void *hdr)
}
/**
+ * genlmsg_multicast_netns_filtered - multicast a netlink message
+ * to a specific netns with filter
+ * function
+ * @family: the generic netlink family
+ * @net: the net namespace
+ * @skb: netlink message as socket buffer
+ * @portid: own netlink portid to avoid sending to yourself
+ * @group: offset of multicast group in groups array
+ * @flags: allocation flags
+ * @filter: filter function
+ * @filter_data: filter function private data
+ *
+ * Return: 0 on success, negative error code for failure.
+ */
+static inline int
+genlmsg_multicast_netns_filtered(const struct genl_family *family,
+ struct net *net, struct sk_buff *skb,
+ u32 portid, unsigned int group, gfp_t flags,
+ netlink_filter_fn filter,
+ void *filter_data)
+{
+ if (WARN_ON_ONCE(group >= family->n_mcgrps))
+ return -EINVAL;
+ group = family->mcgrp_offset + group;
+ return nlmsg_multicast_filtered(net->genl_sock, skb, portid, group,
+ flags, filter, filter_data);
+}
+
+/**
* genlmsg_multicast_netns - multicast a netlink message to a specific netns
* @family: the generic netlink family
* @net: the net namespace
@@ -450,10 +490,8 @@ static inline int genlmsg_multicast_netns(const struct genl_family *family,
struct net *net, struct sk_buff *skb,
u32 portid, unsigned int group, gfp_t flags)
{
- if (WARN_ON_ONCE(group >= family->n_mcgrps))
- return -EINVAL;
- group = family->mcgrp_offset + group;
- return nlmsg_multicast(net->genl_sock, skb, portid, group, flags);
+ return genlmsg_multicast_netns_filtered(family, net, skb, portid,
+ group, flags, NULL, NULL);
}
/**
diff --git a/include/net/netlink.h b/include/net/netlink.h
index 28039e57070a..c19ff921b661 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -1087,21 +1087,29 @@ static inline void nlmsg_free(struct sk_buff *skb)
}
/**
- * nlmsg_multicast - multicast a netlink message
+ * nlmsg_multicast_filtered - multicast a netlink message with filter function
* @sk: netlink socket to spread messages to
* @skb: netlink message as socket buffer
* @portid: own netlink portid to avoid sending to yourself
* @group: multicast group id
* @flags: allocation flags
+ * @filter: filter function
+ * @filter_data: filter function private data
+ *
+ * Return: 0 on success, negative error code for failure.
*/
-static inline int nlmsg_multicast(struct sock *sk, struct sk_buff *skb,
- u32 portid, unsigned int group, gfp_t flags)
+static inline int nlmsg_multicast_filtered(struct sock *sk, struct sk_buff *skb,
+ u32 portid, unsigned int group,
+ gfp_t flags,
+ netlink_filter_fn filter,
+ void *filter_data)
{
int err;
NETLINK_CB(skb).dst_group = group;
- err = netlink_broadcast(sk, skb, portid, group, flags);
+ err = netlink_broadcast_filtered(sk, skb, portid, group, flags,
+ filter, filter_data);
if (err > 0)
err = 0;
@@ -1109,6 +1117,21 @@ static inline int nlmsg_multicast(struct sock *sk, struct sk_buff *skb,
}
/**
+ * nlmsg_multicast - multicast a netlink message
+ * @sk: netlink socket to spread messages to
+ * @skb: netlink message as socket buffer
+ * @portid: own netlink portid to avoid sending to yourself
+ * @group: multicast group id
+ * @flags: allocation flags
+ */
+static inline int nlmsg_multicast(struct sock *sk, struct sk_buff *skb,
+ u32 portid, unsigned int group, gfp_t flags)
+{
+ return nlmsg_multicast_filtered(sk, skb, portid, group, flags,
+ NULL, NULL);
+}
+
+/**
* nlmsg_unicast - unicast a netlink message
* @sk: netlink socket to spread message to
* @skb: netlink message as socket buffer
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index b3c8383d342d..130cae0d3e20 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -139,6 +139,8 @@ enum devlink_command {
DEVLINK_CMD_SELFTESTS_GET, /* can dump */
DEVLINK_CMD_SELFTESTS_RUN,
+ DEVLINK_CMD_NOTIFY_FILTER_SET,
+
/* add new commands above here */
__DEVLINK_CMD_MAX,
DEVLINK_CMD_MAX = __DEVLINK_CMD_MAX - 1
generated by cgit v1.2.3 (git 2.0.4) at 2026-04-28 20:31:44 +0000