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-rw-r--r--include/net/rtnetlink.h199
1 files changed, 199 insertions, 0 deletions
diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h
new file mode 100644
index 0000000000..6506221c5f
--- /dev/null
+++ b/include/net/rtnetlink.h
@@ -0,0 +1,199 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __NET_RTNETLINK_H
+#define __NET_RTNETLINK_H
+
+#include <linux/rtnetlink.h>
+#include <net/netlink.h>
+
+typedef int (*rtnl_doit_func)(struct sk_buff *, struct nlmsghdr *,
+ struct netlink_ext_ack *);
+typedef int (*rtnl_dumpit_func)(struct sk_buff *, struct netlink_callback *);
+
+enum rtnl_link_flags {
+ RTNL_FLAG_DOIT_UNLOCKED = BIT(0),
+ RTNL_FLAG_BULK_DEL_SUPPORTED = BIT(1),
+};
+
+enum rtnl_kinds {
+ RTNL_KIND_NEW,
+ RTNL_KIND_DEL,
+ RTNL_KIND_GET,
+ RTNL_KIND_SET
+};
+#define RTNL_KIND_MASK 0x3
+
+static inline enum rtnl_kinds rtnl_msgtype_kind(int msgtype)
+{
+ return msgtype & RTNL_KIND_MASK;
+}
+
+void rtnl_register(int protocol, int msgtype,
+ rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
+int rtnl_register_module(struct module *owner, int protocol, int msgtype,
+ rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
+int rtnl_unregister(int protocol, int msgtype);
+void rtnl_unregister_all(int protocol);
+
+static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
+{
+ if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
+ return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
+ else
+ return AF_UNSPEC;
+}
+
+/**
+ * struct rtnl_link_ops - rtnetlink link operations
+ *
+ * @list: Used internally
+ * @kind: Identifier
+ * @netns_refund: Physical device, move to init_net on netns exit
+ * @maxtype: Highest device specific netlink attribute number
+ * @policy: Netlink policy for device specific attribute validation
+ * @validate: Optional validation function for netlink/changelink parameters
+ * @alloc: netdev allocation function, can be %NULL and is then used
+ * in place of alloc_netdev_mqs(), in this case @priv_size
+ * and @setup are unused. Returns a netdev or ERR_PTR().
+ * @priv_size: sizeof net_device private space
+ * @setup: net_device setup function
+ * @newlink: Function for configuring and registering a new device
+ * @changelink: Function for changing parameters of an existing device
+ * @dellink: Function to remove a device
+ * @get_size: Function to calculate required room for dumping device
+ * specific netlink attributes
+ * @fill_info: Function to dump device specific netlink attributes
+ * @get_xstats_size: Function to calculate required room for dumping device
+ * specific statistics
+ * @fill_xstats: Function to dump device specific statistics
+ * @get_num_tx_queues: Function to determine number of transmit queues
+ * to create when creating a new device.
+ * @get_num_rx_queues: Function to determine number of receive queues
+ * to create when creating a new device.
+ * @get_link_net: Function to get the i/o netns of the device
+ * @get_linkxstats_size: Function to calculate the required room for
+ * dumping device-specific extended link stats
+ * @fill_linkxstats: Function to dump device-specific extended link stats
+ */
+struct rtnl_link_ops {
+ struct list_head list;
+
+ const char *kind;
+
+ size_t priv_size;
+ struct net_device *(*alloc)(struct nlattr *tb[],
+ const char *ifname,
+ unsigned char name_assign_type,
+ unsigned int num_tx_queues,
+ unsigned int num_rx_queues);
+ void (*setup)(struct net_device *dev);
+
+ bool netns_refund;
+ unsigned int maxtype;
+ const struct nla_policy *policy;
+ int (*validate)(struct nlattr *tb[],
+ struct nlattr *data[],
+ struct netlink_ext_ack *extack);
+
+ int (*newlink)(struct net *src_net,
+ struct net_device *dev,
+ struct nlattr *tb[],
+ struct nlattr *data[],
+ struct netlink_ext_ack *extack);
+ int (*changelink)(struct net_device *dev,
+ struct nlattr *tb[],
+ struct nlattr *data[],
+ struct netlink_ext_ack *extack);
+ void (*dellink)(struct net_device *dev,
+ struct list_head *head);
+
+ size_t (*get_size)(const struct net_device *dev);
+ int (*fill_info)(struct sk_buff *skb,
+ const struct net_device *dev);
+
+ size_t (*get_xstats_size)(const struct net_device *dev);
+ int (*fill_xstats)(struct sk_buff *skb,
+ const struct net_device *dev);
+ unsigned int (*get_num_tx_queues)(void);
+ unsigned int (*get_num_rx_queues)(void);
+
+ unsigned int slave_maxtype;
+ const struct nla_policy *slave_policy;
+ int (*slave_changelink)(struct net_device *dev,
+ struct net_device *slave_dev,
+ struct nlattr *tb[],
+ struct nlattr *data[],
+ struct netlink_ext_ack *extack);
+ size_t (*get_slave_size)(const struct net_device *dev,
+ const struct net_device *slave_dev);
+ int (*fill_slave_info)(struct sk_buff *skb,
+ const struct net_device *dev,
+ const struct net_device *slave_dev);
+ struct net *(*get_link_net)(const struct net_device *dev);
+ size_t (*get_linkxstats_size)(const struct net_device *dev,
+ int attr);
+ int (*fill_linkxstats)(struct sk_buff *skb,
+ const struct net_device *dev,
+ int *prividx, int attr);
+};
+
+int __rtnl_link_register(struct rtnl_link_ops *ops);
+void __rtnl_link_unregister(struct rtnl_link_ops *ops);
+
+int rtnl_link_register(struct rtnl_link_ops *ops);
+void rtnl_link_unregister(struct rtnl_link_ops *ops);
+
+/**
+ * struct rtnl_af_ops - rtnetlink address family operations
+ *
+ * @list: Used internally
+ * @family: Address family
+ * @fill_link_af: Function to fill IFLA_AF_SPEC with address family
+ * specific netlink attributes.
+ * @get_link_af_size: Function to calculate size of address family specific
+ * netlink attributes.
+ * @validate_link_af: Validate a IFLA_AF_SPEC attribute, must check attr
+ * for invalid configuration settings.
+ * @set_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
+ * net_device accordingly.
+ */
+struct rtnl_af_ops {
+ struct list_head list;
+ int family;
+
+ int (*fill_link_af)(struct sk_buff *skb,
+ const struct net_device *dev,
+ u32 ext_filter_mask);
+ size_t (*get_link_af_size)(const struct net_device *dev,
+ u32 ext_filter_mask);
+
+ int (*validate_link_af)(const struct net_device *dev,
+ const struct nlattr *attr,
+ struct netlink_ext_ack *extack);
+ int (*set_link_af)(struct net_device *dev,
+ const struct nlattr *attr,
+ struct netlink_ext_ack *extack);
+ int (*fill_stats_af)(struct sk_buff *skb,
+ const struct net_device *dev);
+ size_t (*get_stats_af_size)(const struct net_device *dev);
+};
+
+void rtnl_af_register(struct rtnl_af_ops *ops);
+void rtnl_af_unregister(struct rtnl_af_ops *ops);
+
+struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
+struct net_device *rtnl_create_link(struct net *net, const char *ifname,
+ unsigned char name_assign_type,
+ const struct rtnl_link_ops *ops,
+ struct nlattr *tb[],
+ struct netlink_ext_ack *extack);
+int rtnl_delete_link(struct net_device *dev, u32 portid, const struct nlmsghdr *nlh);
+int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm,
+ u32 portid, const struct nlmsghdr *nlh);
+
+int rtnl_nla_parse_ifinfomsg(struct nlattr **tb, const struct nlattr *nla_peer,
+ struct netlink_ext_ack *exterr);
+struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid);
+
+#define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
+
+#endif
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