[linux-block.git] / net / core / dev.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _NET_CORE_DEV_H
#define _NET_CORE_DEV_H

#include <linux/types.h>

struct net;
struct net_device;
struct netdev_bpf;
struct netdev_phys_item_id;
struct netlink_ext_ack;
struct cpumask;

/* Random bits of netdevice that don't need to be exposed */
#define FLOW_LIMIT_HISTORY	(1 << 7)  /* must be ^2 and !overflow buckets */
struct sd_flow_limit {
	u64			count;
	unsigned int		num_buckets;
	unsigned int		history_head;
	u16			history[FLOW_LIMIT_HISTORY];
	u8			buckets[];
};

extern int netdev_flow_limit_table_len;

#ifdef CONFIG_PROC_FS
int __init dev_proc_init(void);
#else
#define dev_proc_init() 0
#endif

void linkwatch_init_dev(struct net_device *dev);
void linkwatch_run_queue(void);

void dev_addr_flush(struct net_device *dev);
int dev_addr_init(struct net_device *dev);
void dev_addr_check(struct net_device *dev);

/* sysctls not referred to from outside net/core/ */
extern int		netdev_budget;
extern unsigned int	netdev_budget_usecs;
extern unsigned int	sysctl_skb_defer_max;
extern int		netdev_tstamp_prequeue;
extern int		netdev_unregister_timeout_secs;
extern int		weight_p;
extern int		dev_weight_rx_bias;
extern int		dev_weight_tx_bias;

/* rtnl helpers */
extern struct list_head net_todo_list;
void netdev_run_todo(void);

/* netdev management, shared between various uAPI entry points */
struct netdev_name_node {
	struct hlist_node hlist;
	struct list_head list;
	struct net_device *dev;
	const char *name;
};

int netdev_get_name(struct net *net, char *name, int ifindex);
int dev_change_name(struct net_device *dev, const char *newname);

#define netdev_for_each_altname(dev, namenode)				\
	list_for_each_entry((namenode), &(dev)->name_node->list, list)
#define netdev_for_each_altname_safe(dev, namenode, next)		\
	list_for_each_entry_safe((namenode), (next), &(dev)->name_node->list, \
				 list)

int netdev_name_node_alt_create(struct net_device *dev, const char *name);
int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);

int dev_validate_mtu(struct net_device *dev, int mtu,
		     struct netlink_ext_ack *extack);
int dev_set_mtu_ext(struct net_device *dev, int mtu,
		    struct netlink_ext_ack *extack);

int dev_get_phys_port_id(struct net_device *dev,
			 struct netdev_phys_item_id *ppid);
int dev_get_phys_port_name(struct net_device *dev,
			   char *name, size_t len);

int dev_change_proto_down(struct net_device *dev, bool proto_down);
void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
				  u32 value);

typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
		      int fd, int expected_fd, u32 flags);

int dev_change_tx_queue_len(struct net_device *dev, unsigned long new_len);
void dev_set_group(struct net_device *dev, int new_group);
int dev_change_carrier(struct net_device *dev, bool new_carrier);

void __dev_set_rx_mode(struct net_device *dev);

void __dev_notify_flags(struct net_device *dev, unsigned int old_flags,
			unsigned int gchanges, u32 portid,
			const struct nlmsghdr *nlh);

void unregister_netdevice_many_notify(struct list_head *head,
				      u32 portid, const struct nlmsghdr *nlh);

static inline void netif_set_gso_max_size(struct net_device *dev,
					  unsigned int size)
{
	/* dev->gso_max_size is read locklessly from sk_setup_caps() */
	WRITE_ONCE(dev->gso_max_size, size);
	if (size <= GSO_LEGACY_MAX_SIZE)
		WRITE_ONCE(dev->gso_ipv4_max_size, size);
}

static inline void netif_set_gso_max_segs(struct net_device *dev,
					  unsigned int segs)
{
	/* dev->gso_max_segs is read locklessly from sk_setup_caps() */
	WRITE_ONCE(dev->gso_max_segs, segs);
}

static inline void netif_set_gro_max_size(struct net_device *dev,
					  unsigned int size)
{
	/* This pairs with the READ_ONCE() in skb_gro_receive() */
	WRITE_ONCE(dev->gro_max_size, size);
	if (size <= GRO_LEGACY_MAX_SIZE)
		WRITE_ONCE(dev->gro_ipv4_max_size, size);
}

static inline void netif_set_gso_ipv4_max_size(struct net_device *dev,
					       unsigned int size)
{
	/* dev->gso_ipv4_max_size is read locklessly from sk_setup_caps() */
	WRITE_ONCE(dev->gso_ipv4_max_size, size);
}

static inline void netif_set_gro_ipv4_max_size(struct net_device *dev,
					       unsigned int size)
{
	/* This pairs with the READ_ONCE() in skb_gro_receive() */
	WRITE_ONCE(dev->gro_ipv4_max_size, size);
}

int rps_cpumask_housekeeping(struct cpumask *mask);

#if defined(CONFIG_DEBUG_NET) && defined(CONFIG_BPF_SYSCALL)
void xdp_do_check_flushed(struct napi_struct *napi);
#else
static inline void xdp_do_check_flushed(struct napi_struct *napi) { }
#endif

struct napi_struct *napi_by_id(unsigned int napi_id);
#endif
Commit	Line	Data
6264f58c JK	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;
370ca718	12	struct cpumask;
6264f58c JK	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);
6264f58c JK	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;
39564c3f	42	extern unsigned int sysctl_skb_defer_max;
6264f58c JK	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
7663d522 JK	64	#define netdev_for_each_altname(dev, namenode) \
7663d522 JK	65	list_for_each_entry((namenode), &(dev)->name_node->list, list)
d09486a0 JK	66	#define netdev_for_each_altname_safe(dev, namenode, next) \
	67	list_for_each_entry_safe((namenode), (next), &(dev)->name_node->list, \
	68	list)
7663d522	69
6264f58c JK	70	int netdev_name_node_alt_create(struct net_device dev, const char name);
	71	int netdev_name_node_alt_destroy(struct net_device dev, const char name);
	72
	73	int dev_validate_mtu(struct net_device *dev, int mtu,
	74	struct netlink_ext_ack *extack);
	75	int dev_set_mtu_ext(struct net_device *dev, int mtu,
	76	struct netlink_ext_ack *extack);
	77
	78	int dev_get_phys_port_id(struct net_device *dev,
	79	struct netdev_phys_item_id *ppid);
	80	int dev_get_phys_port_name(struct net_device *dev,
	81	char *name, size_t len);
	82
	83	int dev_change_proto_down(struct net_device *dev, bool proto_down);
	84	void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
	85	u32 value);
	86
	87	typedef int (bpf_op_t)(struct net_device dev, struct netdev_bpf *bpf);
	88	int dev_change_xdp_fd(struct net_device dev, struct netlink_ext_ack extack,
	89	int fd, int expected_fd, u32 flags);
	90
	91	int dev_change_tx_queue_len(struct net_device *dev, unsigned long new_len);
	92	void dev_set_group(struct net_device *dev, int new_group);
	93	int dev_change_carrier(struct net_device *dev, bool new_carrier);
	94
	95	void __dev_set_rx_mode(struct net_device *dev);
	96
1d997f10 HL	97	void __dev_notify_flags(struct net_device *dev, unsigned int old_flags,
	98	unsigned int gchanges, u32 portid,
	99	const struct nlmsghdr *nlh);
	100
77f4aa9a HL	101	void unregister_netdevice_many_notify(struct list_head *head,
	102	u32 portid, const struct nlmsghdr *nlh);
	103
744d49da JK	104	static inline void netif_set_gso_max_size(struct net_device *dev,
	105	unsigned int size)
	106	{
	107	/* dev->gso_max_size is read locklessly from sk_setup_caps() */
	108	WRITE_ONCE(dev->gso_max_size, size);
9eefedd5 XL	109	if (size <= GSO_LEGACY_MAX_SIZE)
9eefedd5 XL	110	WRITE_ONCE(dev->gso_ipv4_max_size, size);
744d49da JK	111	}
	112
	113	static inline void netif_set_gso_max_segs(struct net_device *dev,
	114	unsigned int segs)
	115	{
	116	/* dev->gso_max_segs is read locklessly from sk_setup_caps() */
	117	WRITE_ONCE(dev->gso_max_segs, segs);
	118	}
	119
	120	static inline void netif_set_gro_max_size(struct net_device *dev,
	121	unsigned int size)
	122	{
	123	/* This pairs with the READ_ONCE() in skb_gro_receive() */
	124	WRITE_ONCE(dev->gro_max_size, size);
9eefedd5 XL	125	if (size <= GRO_LEGACY_MAX_SIZE)
	126	WRITE_ONCE(dev->gro_ipv4_max_size, size);
	127	}
	128
	129	static inline void netif_set_gso_ipv4_max_size(struct net_device *dev,
	130	unsigned int size)
	131	{
	132	/* dev->gso_ipv4_max_size is read locklessly from sk_setup_caps() */
	133	WRITE_ONCE(dev->gso_ipv4_max_size, size);
	134	}
	135
	136	static inline void netif_set_gro_ipv4_max_size(struct net_device *dev,
	137	unsigned int size)
	138	{
	139	/* This pairs with the READ_ONCE() in skb_gro_receive() */
	140	WRITE_ONCE(dev->gro_ipv4_max_size, size);
744d49da JK	141	}
744d49da JK	142
370ca718	143	int rps_cpumask_housekeeping(struct cpumask *mask);
9a675ba5 SAS	144
	145	#if defined(CONFIG_DEBUG_NET) && defined(CONFIG_BPF_SYSCALL)
	146	void xdp_do_check_flushed(struct napi_struct *napi);
	147	#else
	148	static inline void xdp_do_check_flushed(struct napi_struct *napi) { }
	149	#endif
27f91aaf AN	150
27f91aaf AN	151	struct napi_struct *napi_by_id(unsigned int napi_id);
6264f58c	152	#endif