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