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 | struct 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 */ |
16 | struct 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 | |
24 | extern int netdev_flow_limit_table_len; |
25 | |
26 | #ifdef CONFIG_PROC_FS |
27 | int __init dev_proc_init(void); |
28 | #else |
29 | #define dev_proc_init() 0 |
30 | #endif |
31 | |
32 | void linkwatch_init_dev(struct net_device *dev); |
33 | void linkwatch_forget_dev(struct net_device *dev); |
34 | void linkwatch_run_queue(void); |
35 | |
36 | void dev_addr_flush(struct net_device *dev); |
37 | int dev_addr_init(struct net_device *dev); |
38 | void dev_addr_check(struct net_device *dev); |
39 | |
40 | /* sysctls not referred to from outside net/core/ */ |
41 | extern int netdev_budget; |
42 | extern unsigned int netdev_budget_usecs; |
43 | extern unsigned int sysctl_skb_defer_max; |
44 | extern int netdev_tstamp_prequeue; |
45 | extern int netdev_unregister_timeout_secs; |
46 | extern int weight_p; |
47 | extern int dev_weight_rx_bias; |
48 | extern int dev_weight_tx_bias; |
49 | |
50 | /* rtnl helpers */ |
51 | extern struct list_head net_todo_list; |
52 | void netdev_run_todo(void); |
53 | |
54 | /* netdev management, shared between various uAPI entry points */ |
55 | struct netdev_name_node { |
56 | struct hlist_node hlist; |
57 | struct list_head list; |
58 | struct net_device *dev; |
59 | const char *name; |
60 | }; |
61 | |
62 | int netdev_get_name(struct net *net, char *name, int ifindex); |
63 | int dev_change_name(struct net_device *dev, const char *newname); |
64 | |
65 | #define netdev_for_each_altname(dev, namenode) \ |
66 | list_for_each_entry((namenode), &(dev)->name_node->list, list) |
67 | |
68 | int netdev_name_node_alt_create(struct net_device *dev, const char *name); |
69 | int netdev_name_node_alt_destroy(struct net_device *dev, const char *name); |
70 | |
71 | int dev_validate_mtu(struct net_device *dev, int mtu, |
72 | struct netlink_ext_ack *extack); |
73 | int dev_set_mtu_ext(struct net_device *dev, int mtu, |
74 | struct netlink_ext_ack *extack); |
75 | |
76 | int dev_get_phys_port_id(struct net_device *dev, |
77 | struct netdev_phys_item_id *ppid); |
78 | int dev_get_phys_port_name(struct net_device *dev, |
79 | char *name, size_t len); |
80 | |
81 | int dev_change_proto_down(struct net_device *dev, bool proto_down); |
82 | void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask, |
83 | u32 value); |
84 | |
85 | typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf); |
86 | int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack, |
87 | int fd, int expected_fd, u32 flags); |
88 | |
89 | int dev_change_tx_queue_len(struct net_device *dev, unsigned long new_len); |
90 | void dev_set_group(struct net_device *dev, int new_group); |
91 | int dev_change_carrier(struct net_device *dev, bool new_carrier); |
92 | |
93 | void __dev_set_rx_mode(struct net_device *dev); |
94 | |
95 | void __dev_notify_flags(struct net_device *dev, unsigned int old_flags, |
96 | unsigned int gchanges, u32 portid, |
97 | const struct nlmsghdr *nlh); |
98 | |
99 | void unregister_netdevice_many_notify(struct list_head *head, |
100 | u32 portid, const struct nlmsghdr *nlh); |
101 | |
102 | static inline void netif_set_gso_max_size(struct net_device *dev, |
103 | unsigned int size) |
104 | { |
105 | /* dev->gso_max_size is read locklessly from sk_setup_caps() */ |
106 | WRITE_ONCE(dev->gso_max_size, size); |
107 | if (size <= GSO_LEGACY_MAX_SIZE) |
108 | WRITE_ONCE(dev->gso_ipv4_max_size, size); |
109 | } |
110 | |
111 | static inline void netif_set_gso_max_segs(struct net_device *dev, |
112 | unsigned int segs) |
113 | { |
114 | /* dev->gso_max_segs is read locklessly from sk_setup_caps() */ |
115 | WRITE_ONCE(dev->gso_max_segs, segs); |
116 | } |
117 | |
118 | static inline void netif_set_gro_max_size(struct net_device *dev, |
119 | unsigned int size) |
120 | { |
121 | /* This pairs with the READ_ONCE() in skb_gro_receive() */ |
122 | WRITE_ONCE(dev->gro_max_size, size); |
123 | if (size <= GRO_LEGACY_MAX_SIZE) |
124 | WRITE_ONCE(dev->gro_ipv4_max_size, size); |
125 | } |
126 | |
127 | static inline void netif_set_gso_ipv4_max_size(struct net_device *dev, |
128 | unsigned int size) |
129 | { |
130 | /* dev->gso_ipv4_max_size is read locklessly from sk_setup_caps() */ |
131 | WRITE_ONCE(dev->gso_ipv4_max_size, size); |
132 | } |
133 | |
134 | static inline void netif_set_gro_ipv4_max_size(struct net_device *dev, |
135 | unsigned int size) |
136 | { |
137 | /* This pairs with the READ_ONCE() in skb_gro_receive() */ |
138 | WRITE_ONCE(dev->gro_ipv4_max_size, size); |
139 | } |
140 | |
141 | int rps_cpumask_housekeeping(struct cpumask *mask); |
142 | |
143 | #if defined(CONFIG_DEBUG_NET) && defined(CONFIG_BPF_SYSCALL) |
144 | void xdp_do_check_flushed(struct napi_struct *napi); |
145 | #else |
146 | static inline void xdp_do_check_flushed(struct napi_struct *napi) { } |
147 | #endif |
148 | #endif |
149 | |