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 91 void __dev_notify_flags(struct net_device *dev, unsigned int old_flags, 92 unsigned int gchanges, u32 portid, 93 const struct nlmsghdr *nlh); 94 95 void unregister_netdevice_many_notify(struct list_head *head, 96 u32 portid, const struct nlmsghdr *nlh); 97 98 static inline void netif_set_gso_max_size(struct net_device *dev, 99 unsigned int size) 100 { 101 /* dev->gso_max_size is read locklessly from sk_setup_caps() */ 102 WRITE_ONCE(dev->gso_max_size, size); 103 } 104 105 static inline void netif_set_gso_max_segs(struct net_device *dev, 106 unsigned int segs) 107 { 108 /* dev->gso_max_segs is read locklessly from sk_setup_caps() */ 109 WRITE_ONCE(dev->gso_max_segs, segs); 110 } 111 112 static inline void netif_set_gro_max_size(struct net_device *dev, 113 unsigned int size) 114 { 115 /* This pairs with the READ_ONCE() in skb_gro_receive() */ 116 WRITE_ONCE(dev->gro_max_size, size); 117 } 118 119 #endif 120