Linux kernel mirror (for testing)
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linux
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;
12struct cpumask;
13
14/* Random bits of netdevice that don't need to be exposed */
15#define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
16struct sd_flow_limit {
17 u64 count;
18 unsigned int num_buckets;
19 unsigned int history_head;
20 u16 history[FLOW_LIMIT_HISTORY];
21 u8 buckets[];
22};
23
24extern int netdev_flow_limit_table_len;
25
26#ifdef CONFIG_PROC_FS
27int __init dev_proc_init(void);
28#else
29#define dev_proc_init() 0
30#endif
31
32void linkwatch_init_dev(struct net_device *dev);
33void linkwatch_forget_dev(struct net_device *dev);
34void linkwatch_run_queue(void);
35
36void dev_addr_flush(struct net_device *dev);
37int dev_addr_init(struct net_device *dev);
38void dev_addr_check(struct net_device *dev);
39
40/* sysctls not referred to from outside net/core/ */
41extern int netdev_budget;
42extern unsigned int netdev_budget_usecs;
43extern unsigned int sysctl_skb_defer_max;
44extern int netdev_tstamp_prequeue;
45extern int netdev_unregister_timeout_secs;
46extern int weight_p;
47extern int dev_weight_rx_bias;
48extern int dev_weight_tx_bias;
49
50/* rtnl helpers */
51extern struct list_head net_todo_list;
52void netdev_run_todo(void);
53
54/* netdev management, shared between various uAPI entry points */
55struct netdev_name_node {
56 struct hlist_node hlist;
57 struct list_head list;
58 struct net_device *dev;
59 const char *name;
60};
61
62int netdev_get_name(struct net *net, char *name, int ifindex);
63int dev_change_name(struct net_device *dev, const char *newname);
64
65int netdev_name_node_alt_create(struct net_device *dev, const char *name);
66int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
67
68int dev_validate_mtu(struct net_device *dev, int mtu,
69 struct netlink_ext_ack *extack);
70int dev_set_mtu_ext(struct net_device *dev, int mtu,
71 struct netlink_ext_ack *extack);
72
73int dev_get_phys_port_id(struct net_device *dev,
74 struct netdev_phys_item_id *ppid);
75int dev_get_phys_port_name(struct net_device *dev,
76 char *name, size_t len);
77
78int dev_change_proto_down(struct net_device *dev, bool proto_down);
79void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
80 u32 value);
81
82typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
83int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
84 int fd, int expected_fd, u32 flags);
85
86int dev_change_tx_queue_len(struct net_device *dev, unsigned long new_len);
87void dev_set_group(struct net_device *dev, int new_group);
88int dev_change_carrier(struct net_device *dev, bool new_carrier);
89
90void __dev_set_rx_mode(struct net_device *dev);
91
92void __dev_notify_flags(struct net_device *dev, unsigned int old_flags,
93 unsigned int gchanges, u32 portid,
94 const struct nlmsghdr *nlh);
95
96void unregister_netdevice_many_notify(struct list_head *head,
97 u32 portid, const struct nlmsghdr *nlh);
98
99static inline void netif_set_gso_max_size(struct net_device *dev,
100 unsigned int size)
101{
102 /* dev->gso_max_size is read locklessly from sk_setup_caps() */
103 WRITE_ONCE(dev->gso_max_size, size);
104 if (size <= GSO_LEGACY_MAX_SIZE)
105 WRITE_ONCE(dev->gso_ipv4_max_size, size);
106}
107
108static inline void netif_set_gso_max_segs(struct net_device *dev,
109 unsigned int segs)
110{
111 /* dev->gso_max_segs is read locklessly from sk_setup_caps() */
112 WRITE_ONCE(dev->gso_max_segs, segs);
113}
114
115static inline void netif_set_gro_max_size(struct net_device *dev,
116 unsigned int size)
117{
118 /* This pairs with the READ_ONCE() in skb_gro_receive() */
119 WRITE_ONCE(dev->gro_max_size, size);
120 if (size <= GRO_LEGACY_MAX_SIZE)
121 WRITE_ONCE(dev->gro_ipv4_max_size, size);
122}
123
124static inline void netif_set_gso_ipv4_max_size(struct net_device *dev,
125 unsigned int size)
126{
127 /* dev->gso_ipv4_max_size is read locklessly from sk_setup_caps() */
128 WRITE_ONCE(dev->gso_ipv4_max_size, size);
129}
130
131static inline void netif_set_gro_ipv4_max_size(struct net_device *dev,
132 unsigned int size)
133{
134 /* This pairs with the READ_ONCE() in skb_gro_receive() */
135 WRITE_ONCE(dev->gro_ipv4_max_size, size);
136}
137
138int rps_cpumask_housekeeping(struct cpumask *mask);
139#endif