1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _NET_CORE_DEV_H
3 #define _NET_CORE_DEV_H
5 #include <linux/types.h>
10 struct netdev_phys_item_id;
11 struct netlink_ext_ack;
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 {
18 unsigned int num_buckets;
19 unsigned int history_head;
20 u16 history[FLOW_LIMIT_HISTORY];
24 extern int netdev_flow_limit_table_len;
27 int __init dev_proc_init(void);
29 #define dev_proc_init() 0
32 void linkwatch_init_dev(struct net_device *dev);
33 void linkwatch_run_queue(void);
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);
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;
46 extern int dev_weight_rx_bias;
47 extern int dev_weight_tx_bias;
50 extern struct list_head net_todo_list;
51 void netdev_run_todo(void);
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;
61 int netdev_get_name(struct net *net, char *name, int ifindex);
62 int dev_change_name(struct net_device *dev, const char *newname);
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, \
70 int netdev_name_node_alt_create(struct net_device *dev, const char *name);
71 int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
73 int dev_validate_mtu(struct net_device *dev, int mtu,
74 struct netlink_ext_ack *extack);
75 int dev_set_mtu_ext(struct net_device *dev, int mtu,
76 struct netlink_ext_ack *extack);
78 int dev_get_phys_port_id(struct net_device *dev,
79 struct netdev_phys_item_id *ppid);
80 int dev_get_phys_port_name(struct net_device *dev,
81 char *name, size_t len);
83 int dev_change_proto_down(struct net_device *dev, bool proto_down);
84 void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
87 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
88 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
89 int fd, int expected_fd, u32 flags);
91 int dev_change_tx_queue_len(struct net_device *dev, unsigned long new_len);
92 void dev_set_group(struct net_device *dev, int new_group);
93 int dev_change_carrier(struct net_device *dev, bool new_carrier);
95 void __dev_set_rx_mode(struct net_device *dev);
97 void __dev_notify_flags(struct net_device *dev, unsigned int old_flags,
98 unsigned int gchanges, u32 portid,
99 const struct nlmsghdr *nlh);
101 void unregister_netdevice_many_notify(struct list_head *head,
102 u32 portid, const struct nlmsghdr *nlh);
104 static inline void netif_set_gso_max_size(struct net_device *dev,
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);
113 static inline void netif_set_gso_max_segs(struct net_device *dev,
116 /* dev->gso_max_segs is read locklessly from sk_setup_caps() */
117 WRITE_ONCE(dev->gso_max_segs, segs);
120 static inline void netif_set_gro_max_size(struct net_device *dev,
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);
129 static inline void netif_set_gso_ipv4_max_size(struct net_device *dev,
132 /* dev->gso_ipv4_max_size is read locklessly from sk_setup_caps() */
133 WRITE_ONCE(dev->gso_ipv4_max_size, size);
136 static inline void netif_set_gro_ipv4_max_size(struct net_device *dev,
139 /* This pairs with the READ_ONCE() in skb_gro_receive() */
140 WRITE_ONCE(dev->gro_ipv4_max_size, size);
143 int rps_cpumask_housekeeping(struct cpumask *mask);
145 #if defined(CONFIG_DEBUG_NET) && defined(CONFIG_BPF_SYSCALL)
146 void xdp_do_check_flushed(struct napi_struct *napi);
148 static inline void xdp_do_check_flushed(struct napi_struct *napi) { }
151 struct napi_struct *napi_by_id(unsigned int napi_id);