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