Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
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#include <linux/rwsem.h>
7#include <linux/netdevice.h>
8
9struct net;
10struct netlink_ext_ack;
11struct cpumask;
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_run_queue(void);
33
34void dev_addr_flush(struct net_device *dev);
35int dev_addr_init(struct net_device *dev);
36void dev_addr_check(struct net_device *dev);
37
38/* sysctls not referred to from outside net/core/ */
39extern int netdev_unregister_timeout_secs;
40extern int weight_p;
41extern int dev_weight_rx_bias;
42extern int dev_weight_tx_bias;
43
44extern struct rw_semaphore dev_addr_sem;
45
46/* rtnl helpers */
47extern struct list_head net_todo_list;
48void netdev_run_todo(void);
49
50/* netdev management, shared between various uAPI entry points */
51struct netdev_name_node {
52 struct hlist_node hlist;
53 struct list_head list;
54 struct net_device *dev;
55 const char *name;
56 struct rcu_head rcu;
57};
58
59int netdev_get_name(struct net *net, char *name, int ifindex);
60int dev_change_name(struct net_device *dev, const char *newname);
61
62#define netdev_for_each_altname(dev, namenode) \
63 list_for_each_entry((namenode), &(dev)->name_node->list, list)
64#define netdev_for_each_altname_safe(dev, namenode, next) \
65 list_for_each_entry_safe((namenode), (next), &(dev)->name_node->list, \
66 list)
67
68int netdev_name_node_alt_create(struct net_device *dev, const char *name);
69int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
70
71int dev_validate_mtu(struct net_device *dev, int mtu,
72 struct netlink_ext_ack *extack);
73int dev_set_mtu_ext(struct net_device *dev, int mtu,
74 struct netlink_ext_ack *extack);
75
76int dev_get_phys_port_id(struct net_device *dev,
77 struct netdev_phys_item_id *ppid);
78int dev_get_phys_port_name(struct net_device *dev,
79 char *name, size_t len);
80
81int dev_change_proto_down(struct net_device *dev, bool proto_down);
82void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
83 u32 value);
84
85typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
86int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
87 int fd, int expected_fd, u32 flags);
88
89int dev_change_tx_queue_len(struct net_device *dev, unsigned long new_len);
90void dev_set_group(struct net_device *dev, int new_group);
91int dev_change_carrier(struct net_device *dev, bool new_carrier);
92
93void __dev_set_rx_mode(struct net_device *dev);
94
95void __dev_notify_flags(struct net_device *dev, unsigned int old_flags,
96 unsigned int gchanges, u32 portid,
97 const struct nlmsghdr *nlh);
98
99void unregister_netdevice_many_notify(struct list_head *head,
100 u32 portid, const struct nlmsghdr *nlh);
101
102static inline void netif_set_gso_max_size(struct net_device *dev,
103 unsigned int size)
104{
105 /* dev->gso_max_size is read locklessly from sk_setup_caps() */
106 WRITE_ONCE(dev->gso_max_size, size);
107 if (size <= GSO_LEGACY_MAX_SIZE)
108 WRITE_ONCE(dev->gso_ipv4_max_size, size);
109}
110
111static inline void netif_set_gso_max_segs(struct net_device *dev,
112 unsigned int segs)
113{
114 /* dev->gso_max_segs is read locklessly from sk_setup_caps() */
115 WRITE_ONCE(dev->gso_max_segs, segs);
116}
117
118static inline void netif_set_gro_max_size(struct net_device *dev,
119 unsigned int size)
120{
121 /* This pairs with the READ_ONCE() in skb_gro_receive() */
122 WRITE_ONCE(dev->gro_max_size, size);
123 if (size <= GRO_LEGACY_MAX_SIZE)
124 WRITE_ONCE(dev->gro_ipv4_max_size, size);
125}
126
127static inline void netif_set_gso_ipv4_max_size(struct net_device *dev,
128 unsigned int size)
129{
130 /* dev->gso_ipv4_max_size is read locklessly from sk_setup_caps() */
131 WRITE_ONCE(dev->gso_ipv4_max_size, size);
132}
133
134static inline void netif_set_gro_ipv4_max_size(struct net_device *dev,
135 unsigned int size)
136{
137 /* This pairs with the READ_ONCE() in skb_gro_receive() */
138 WRITE_ONCE(dev->gro_ipv4_max_size, size);
139}
140
141int rps_cpumask_housekeeping(struct cpumask *mask);
142
143#if defined(CONFIG_DEBUG_NET) && defined(CONFIG_BPF_SYSCALL)
144void xdp_do_check_flushed(struct napi_struct *napi);
145#else
146static inline void xdp_do_check_flushed(struct napi_struct *napi) { }
147#endif
148
149struct napi_struct *napi_by_id(unsigned int napi_id);
150void kick_defer_list_purge(struct softnet_data *sd, unsigned int cpu);
151
152#define XMIT_RECURSION_LIMIT 8
153
154#ifndef CONFIG_PREEMPT_RT
155static inline bool dev_xmit_recursion(void)
156{
157 return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
158 XMIT_RECURSION_LIMIT);
159}
160
161static inline void dev_xmit_recursion_inc(void)
162{
163 __this_cpu_inc(softnet_data.xmit.recursion);
164}
165
166static inline void dev_xmit_recursion_dec(void)
167{
168 __this_cpu_dec(softnet_data.xmit.recursion);
169}
170#else
171static inline bool dev_xmit_recursion(void)
172{
173 return unlikely(current->net_xmit.recursion > XMIT_RECURSION_LIMIT);
174}
175
176static inline void dev_xmit_recursion_inc(void)
177{
178 current->net_xmit.recursion++;
179}
180
181static inline void dev_xmit_recursion_dec(void)
182{
183 current->net_xmit.recursion--;
184}
185#endif
186
187int dev_set_hwtstamp_phylib(struct net_device *dev,
188 struct kernel_hwtstamp_config *cfg,
189 struct netlink_ext_ack *extack);
190
191#endif