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
91static inline void netif_set_gso_max_size(struct net_device *dev,
92 unsigned int size)
93{
94 /* dev->gso_max_size is read locklessly from sk_setup_caps() */
95 WRITE_ONCE(dev->gso_max_size, size);
96}
97
98static inline void netif_set_gso_max_segs(struct net_device *dev,
99 unsigned int segs)
100{
101 /* dev->gso_max_segs is read locklessly from sk_setup_caps() */
102 WRITE_ONCE(dev->gso_max_segs, segs);
103}
104
105static inline void netif_set_gro_max_size(struct net_device *dev,
106 unsigned int size)
107{
108 /* This pairs with the READ_ONCE() in skb_gro_receive() */
109 WRITE_ONCE(dev->gro_max_size, size);
110}
111
112#endif
113

source code of linux/net/core/dev.h