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_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
64#define netdev_for_each_altname(dev, namenode) \
65 list_for_each_entry((namenode), &(dev)->name_node->list, list)
66#define netdev_for_each_altname_safe(dev, namenode, next) \
67 list_for_each_entry_safe((namenode), (next), &(dev)->name_node->list, \
68 list)
69
70int netdev_name_node_alt_create(struct net_device *dev, const char *name);
71int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
72
73int dev_validate_mtu(struct net_device *dev, int mtu,
74 struct netlink_ext_ack *extack);
75int dev_set_mtu_ext(struct net_device *dev, int mtu,
76 struct netlink_ext_ack *extack);
77
78int dev_get_phys_port_id(struct net_device *dev,
79 struct netdev_phys_item_id *ppid);
80int dev_get_phys_port_name(struct net_device *dev,
81 char *name, size_t len);
82
83int dev_change_proto_down(struct net_device *dev, bool proto_down);
84void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
85 u32 value);
86
87typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
88int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
89 int fd, int expected_fd, u32 flags);
90
91int dev_change_tx_queue_len(struct net_device *dev, unsigned long new_len);
92void dev_set_group(struct net_device *dev, int new_group);
93int dev_change_carrier(struct net_device *dev, bool new_carrier);
94
95void __dev_set_rx_mode(struct net_device *dev);
96
97void __dev_notify_flags(struct net_device *dev, unsigned int old_flags,
98 unsigned int gchanges, u32 portid,
99 const struct nlmsghdr *nlh);
100
101void unregister_netdevice_many_notify(struct list_head *head,
102 u32 portid, const struct nlmsghdr *nlh);
103
104static inline void netif_set_gso_max_size(struct net_device *dev,
105 unsigned int size)
106{
107 /* dev->gso_max_size is read locklessly from sk_setup_caps() */
108 WRITE_ONCE(dev->gso_max_size, size);
109 if (size <= GSO_LEGACY_MAX_SIZE)
110 WRITE_ONCE(dev->gso_ipv4_max_size, size);
111}
112
113static inline void netif_set_gso_max_segs(struct net_device *dev,
114 unsigned int segs)
115{
116 /* dev->gso_max_segs is read locklessly from sk_setup_caps() */
117 WRITE_ONCE(dev->gso_max_segs, segs);
118}
119
120static inline void netif_set_gro_max_size(struct net_device *dev,
121 unsigned int size)
122{
123 /* This pairs with the READ_ONCE() in skb_gro_receive() */
124 WRITE_ONCE(dev->gro_max_size, size);
125 if (size <= GRO_LEGACY_MAX_SIZE)
126 WRITE_ONCE(dev->gro_ipv4_max_size, size);
127}
128
129static inline void netif_set_gso_ipv4_max_size(struct net_device *dev,
130 unsigned int size)
131{
132 /* dev->gso_ipv4_max_size is read locklessly from sk_setup_caps() */
133 WRITE_ONCE(dev->gso_ipv4_max_size, size);
134}
135
136static inline void netif_set_gro_ipv4_max_size(struct net_device *dev,
137 unsigned int size)
138{
139 /* This pairs with the READ_ONCE() in skb_gro_receive() */
140 WRITE_ONCE(dev->gro_ipv4_max_size, size);
141}
142
143int rps_cpumask_housekeeping(struct cpumask *mask);
144
145#if defined(CONFIG_DEBUG_NET) && defined(CONFIG_BPF_SYSCALL)
146void xdp_do_check_flushed(struct napi_struct *napi);
147#else
148static inline void xdp_do_check_flushed(struct napi_struct *napi) { }
149#endif
150
151struct napi_struct *napi_by_id(unsigned int napi_id);
152#endif