1/* SPDX-License-Identifier: GPL-2.0-or-later */
  2#ifndef _NET_CORE_DEV_H
  3#define _NET_CORE_DEV_H
  4
  5#include <linux/types.h>
  6
  7struct net;
  8struct net_device;
  9struct netdev_bpf;
 10struct netdev_phys_item_id;
 11struct netlink_ext_ack;
 12
 13/* Random bits of netdevice that don't need to be exposed */
 14#define FLOW_LIMIT_HISTORY	(1 << 7)  /* must be ^2 and !overflow buckets */
 15struct sd_flow_limit {
 16	u64			count;
 17	unsigned int		num_buckets;
 18	unsigned int		history_head;
 19	u16			history[FLOW_LIMIT_HISTORY];
 20	u8			buckets[];
 21};
 22
 23extern int netdev_flow_limit_table_len;
 24
 25#ifdef CONFIG_PROC_FS
 26int __init dev_proc_init(void);
 27#else
 28#define dev_proc_init() 0
 29#endif
 30
 31void linkwatch_init_dev(struct net_device *dev);
 32void linkwatch_forget_dev(struct net_device *dev);
 33void linkwatch_run_queue(void);
 34
 35void dev_addr_flush(struct net_device *dev);
 36int dev_addr_init(struct net_device *dev);
 37void dev_addr_check(struct net_device *dev);
 38
 39/* sysctls not referred to from outside net/core/ */
 40extern int		netdev_budget;
 41extern unsigned int	netdev_budget_usecs;
 42extern unsigned int	sysctl_skb_defer_max;
 43extern int		netdev_tstamp_prequeue;
 44extern int		netdev_unregister_timeout_secs;
 45extern int		weight_p;
 46extern int		dev_weight_rx_bias;
 47extern int		dev_weight_tx_bias;
 48
 49/* rtnl helpers */
 50extern struct list_head net_todo_list;
 51void netdev_run_todo(void);
 52
 53/* netdev management, shared between various uAPI entry points */
 54struct netdev_name_node {
 55	struct hlist_node hlist;
 56	struct list_head list;
 57	struct net_device *dev;
 58	const char *name;
 59};
 60
 61int netdev_get_name(struct net *net, char *name, int ifindex);
 62int dev_change_name(struct net_device *dev, const char *newname);
 63
 64int netdev_name_node_alt_create(struct net_device *dev, const char *name);
 65int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
 66
 67int dev_validate_mtu(struct net_device *dev, int mtu,
 68		     struct netlink_ext_ack *extack);
 69int dev_set_mtu_ext(struct net_device *dev, int mtu,
 70		    struct netlink_ext_ack *extack);
 71
 72int dev_get_phys_port_id(struct net_device *dev,
 73			 struct netdev_phys_item_id *ppid);
 74int dev_get_phys_port_name(struct net_device *dev,
 75			   char *name, size_t len);
 76
 77int dev_change_proto_down(struct net_device *dev, bool proto_down);
 78void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
 79				  u32 value);
 80
 81typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
 82int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
 83		      int fd, int expected_fd, u32 flags);
 84
 85int dev_change_tx_queue_len(struct net_device *dev, unsigned long new_len);
 86void dev_set_group(struct net_device *dev, int new_group);
 87int dev_change_carrier(struct net_device *dev, bool new_carrier);
 88
 89void __dev_set_rx_mode(struct net_device *dev);
 90
 91void __dev_notify_flags(struct net_device *dev, unsigned int old_flags,
 92			unsigned int gchanges, u32 portid,
 93			const struct nlmsghdr *nlh);
 94
 95void unregister_netdevice_many_notify(struct list_head *head,
 96				      u32 portid, const struct nlmsghdr *nlh);
 97
 98static inline void netif_set_gso_max_size(struct net_device *dev,
 99					  unsigned int size)
100{
101	/* dev->gso_max_size is read locklessly from sk_setup_caps() */
102	WRITE_ONCE(dev->gso_max_size, size);
103}
104
105static inline void netif_set_gso_max_segs(struct net_device *dev,
106					  unsigned int segs)
107{
108	/* dev->gso_max_segs is read locklessly from sk_setup_caps() */
109	WRITE_ONCE(dev->gso_max_segs, segs);
110}
111
112static inline void netif_set_gro_max_size(struct net_device *dev,
113					  unsigned int size)
114{
115	/* This pairs with the READ_ONCE() in skb_gro_receive() */
116	WRITE_ONCE(dev->gro_max_size, size);
117}
118
119#endif