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
7 struct net;
8 struct net_device;
9 struct netdev_bpf;
10 struct netdev_phys_item_id;
11 struct 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 */
15 struct 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
23 extern int netdev_flow_limit_table_len;
24
25 #ifdef CONFIG_PROC_FS
26 int __init dev_proc_init(void);
27 #else
28 #define dev_proc_init() 0
29 #endif
30
31 void linkwatch_init_dev(struct net_device *dev);
32 void linkwatch_forget_dev(struct net_device *dev);
33 void linkwatch_run_queue(void);
34
35 void dev_addr_flush(struct net_device *dev);
36 int dev_addr_init(struct net_device *dev);
37 void dev_addr_check(struct net_device *dev);
38
39 /* sysctls not referred to from outside net/core/ */
40 extern int netdev_budget;
41 extern unsigned int netdev_budget_usecs;
42 extern unsigned int sysctl_skb_defer_max;
43 extern int netdev_tstamp_prequeue;
44 extern int netdev_unregister_timeout_secs;
45 extern int weight_p;
46 extern int dev_weight_rx_bias;
47 extern int dev_weight_tx_bias;
48
49 /* rtnl helpers */
50 extern struct list_head net_todo_list;
51 void netdev_run_todo(void);
52
53 /* netdev management, shared between various uAPI entry points */
54 struct netdev_name_node {
55 struct hlist_node hlist;
56 struct list_head list;
57 struct net_device *dev;
58 const char *name;
59 };
60
61 int netdev_get_name(struct net *net, char *name, int ifindex);
62 int dev_change_name(struct net_device *dev, const char *newname);
63
64 int netdev_name_node_alt_create(struct net_device *dev, const char *name);
65 int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
66
67 int dev_validate_mtu(struct net_device *dev, int mtu,
68 struct netlink_ext_ack *extack);
69 int dev_set_mtu_ext(struct net_device *dev, int mtu,
70 struct netlink_ext_ack *extack);
71
72 int dev_get_phys_port_id(struct net_device *dev,
73 struct netdev_phys_item_id *ppid);
74 int dev_get_phys_port_name(struct net_device *dev,
75 char *name, size_t len);
76
77 int dev_change_proto_down(struct net_device *dev, bool proto_down);
78 void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
79 u32 value);
80
81 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
82 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
83 int fd, int expected_fd, u32 flags);
84
85 int dev_change_tx_queue_len(struct net_device *dev, unsigned long new_len);
86 void dev_set_group(struct net_device *dev, int new_group);
87 int dev_change_carrier(struct net_device *dev, bool new_carrier);
88
89 void __dev_set_rx_mode(struct net_device *dev);
90
netif_set_gso_max_size(struct net_device * dev,unsigned int size)91 static 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
netif_set_gso_max_segs(struct net_device * dev,unsigned int segs)98 static 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
netif_set_gro_max_size(struct net_device * dev,unsigned int size)105 static 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