LXR linux/net/core/dev.h

   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
   7struct net;
   8struct net_device;
   9struct netdev_bpf;
  10struct netdev_phys_item_id;
  11struct 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 */
  15struct 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
  23extern int netdev_flow_limit_table_len;
  24
  25#ifdef CONFIG_PROC_FS
  26int __init dev_proc_init(void);
  27#else
  28#define dev_proc_init() 0
  29#endif
  30
  31void linkwatch_init_dev(struct net_device *dev);
  32void linkwatch_forget_dev(struct net_device *dev);
  33void linkwatch_run_queue(void);
  34
  35void dev_addr_flush(struct net_device *dev);
  36int dev_addr_init(struct net_device *dev);
  37void dev_addr_check(struct net_device *dev);
  38
  39/* sysctls not referred to from outside net/core/ */
  40extern int              netdev_budget;
  41extern unsigned int     netdev_budget_usecs;
  42extern unsigned int     sysctl_skb_defer_max;
  43extern int              netdev_tstamp_prequeue;
  44extern int              netdev_unregister_timeout_secs;
  45extern int              weight_p;
  46extern int              dev_weight_rx_bias;
  47extern int              dev_weight_tx_bias;
  48
  49/* rtnl helpers */
  50extern struct list_head net_todo_list;
  51void netdev_run_todo(void);
  52
  53/* netdev management, shared between various uAPI entry points */
  54struct netdev_name_node {
  55        struct hlist_node hlist;
  56        struct list_head list;
  57        struct net_device *dev;
  58        const char *name;
  59};
  60
  61int netdev_get_name(struct net *net, char *name, int ifindex);
  62int dev_change_name(struct net_device *dev, const char *newname);
  63
  64int netdev_name_node_alt_create(struct net_device *dev, const char *name);
  65int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
  66
  67int dev_validate_mtu(struct net_device *dev, int mtu,
  68                     struct netlink_ext_ack *extack);
  69int dev_set_mtu_ext(struct net_device *dev, int mtu,
  70                    struct netlink_ext_ack *extack);
  71
  72int dev_get_phys_port_id(struct net_device *dev,
  73                         struct netdev_phys_item_id *ppid);
  74int dev_get_phys_port_name(struct net_device *dev,
  75                           char *name, size_t len);
  76
  77int dev_change_proto_down(struct net_device *dev, bool proto_down);
  78void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
  79                                  u32 value);
  80
  81typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
  82int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
  83                      int fd, int expected_fd, u32 flags);
  84
  85int dev_change_tx_queue_len(struct net_device *dev, unsigned long new_len);
  86void dev_set_group(struct net_device *dev, int new_group);
  87int dev_change_carrier(struct net_device *dev, bool new_carrier);
  88
  89void __dev_set_rx_mode(struct net_device *dev);
  90
  91static inline void netif_set_gso_max_size(struct net_device *dev,
  92                                          unsigned int size)
  93{
  94        /* dev->gso_max_size is read locklessly from sk_setup_caps() */
  95        WRITE_ONCE(dev->gso_max_size, size);
  96}
  97
  98static inline void netif_set_gso_max_segs(struct net_device *dev,
  99                                          unsigned int segs)
 100{
 101        /* dev->gso_max_segs is read locklessly from sk_setup_caps() */
 102        WRITE_ONCE(dev->gso_max_segs, segs);
 103}
 104
 105static inline void netif_set_gro_max_size(struct net_device *dev,
 106                                          unsigned int size)
 107{
 108        /* This pairs with the READ_ONCE() in skb_gro_receive() */
 109        WRITE_ONCE(dev->gro_max_size, size);
 110}
 111
 112#endif
 113