Release 4.7 include/linux/if_team.h

/*
 * include/linux/if_team.h - Network team device driver header
 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */
#ifndef _LINUX_IF_TEAM_H_

#define _LINUX_IF_TEAM_H_

#include <linux/netpoll.h>
#include <net/sch_generic.h>
#include <linux/types.h>
#include <uapi/linux/if_team.h>


struct team_pcpu_stats {
	
u64			rx_packets;
	
u64			rx_bytes;
	
u64			rx_multicast;
	
u64			tx_packets;
	
u64			tx_bytes;
	
struct u64_stats_sync	syncp;
	
u32			rx_dropped;
	
u32			tx_dropped;
	
u32			rx_nohandler;
};

struct team;


struct team_port {
	
struct net_device *dev;
	
struct hlist_node hlist; /* node in enabled ports hash list */
	
struct list_head list; /* node in ordinary list */
	
struct team *team;
	
int index; /* index of enabled port. If disabled, it's set to -1 */

	
bool linkup; /* either state.linkup or user.linkup */

	struct {
		
bool linkup;
		
u32 speed;
		
u8 duplex;
	} 
state;

	/* Values set by userspace */
	struct {
		
bool linkup;
		
bool linkup_enabled;
	} 
user;

	/* Custom gennetlink interface related flags */
	
bool changed;
	
bool removed;

	/*
         * A place for storing original values of the device before it
         * become a port.
         */
	struct {
		
unsigned char dev_addr[MAX_ADDR_LEN];
		
unsigned int mtu;
	} 
orig;

#ifdef CONFIG_NET_POLL_CONTROLLER
	
struct netpoll *np;
#endif

	
s32 priority; /* lower number ~ higher priority */
	
u16 queue_id;
	
struct list_head qom_list; /* node in queue override mapping list */
	
struct rcu_head	rcu;
	
long mode_priv[0];
};



static inline bool team_port_enabled(struct team_port *port)
{
	return port->index != -1;
}

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static inline bool team_port_txable(struct team_port *port)
{
	return port->linkup && team_port_enabled(port);
}

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#ifdef CONFIG_NET_POLL_CONTROLLER


static inline void team_netpoll_send_skb(struct team_port *port,
					 struct sk_buff *skb)
{
	struct netpoll *np = port->np;

	if (np)
		netpoll_send_skb(np, skb);
}
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#else


static inline void team_netpoll_send_skb(struct team_port *port,
					 struct sk_buff *skb)
{
}
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#endif


struct team_mode_ops {
	
int (*init)(struct team *team);
	
void (*exit)(struct team *team);
	
rx_handler_result_t (*receive)(struct team *team,
				       struct team_port *port,
				       struct sk_buff *skb);
	
bool (*transmit)(struct team *team, struct sk_buff *skb);
	
int (*port_enter)(struct team *team, struct team_port *port);
	
void (*port_leave)(struct team *team, struct team_port *port);
	
void (*port_change_dev_addr)(struct team *team, struct team_port *port);
	
void (*port_enabled)(struct team *team, struct team_port *port);
	
void (*port_disabled)(struct team *team, struct team_port *port);
};

extern int team_modeop_port_enter(struct team *team, struct team_port *port);
extern void team_modeop_port_change_dev_addr(struct team *team,
					     struct team_port *port);


enum team_option_type {
	
TEAM_OPTION_TYPE_U32,
	
TEAM_OPTION_TYPE_STRING,
	
TEAM_OPTION_TYPE_BINARY,
	
TEAM_OPTION_TYPE_BOOL,
	
TEAM_OPTION_TYPE_S32,
};


struct team_option_inst_info {
	
u32 array_index;
	
struct team_port *port; /* != NULL if per-port */
};


struct team_gsetter_ctx {
	union {
		
u32 u32_val;
		
const char *str_val;
		struct {
			
const void *ptr;
			
u32 len;
		} 
bin_val;
		
bool bool_val;
		
s32 s32_val;
	} 
data;
	
struct team_option_inst_info *info;
};


struct team_option {
	
struct list_head list;
	
const char *name;
	
bool per_port;
	
unsigned int array_size; /* != 0 means the option is array */
	
enum team_option_type type;
	
int (*init)(struct team *team, struct team_option_inst_info *info);
	
int (*getter)(struct team *team, struct team_gsetter_ctx *ctx);
	
int (*setter)(struct team *team, struct team_gsetter_ctx *ctx);
};

extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info);
extern void team_options_change_check(struct team *team);


struct team_mode {
	
const char *kind;
	
struct module *owner;
	
size_t priv_size;
	
size_t port_priv_size;
	
const struct team_mode_ops *ops;
	
enum netdev_lag_tx_type lag_tx_type;
};


#define TEAM_PORT_HASHBITS 4

#define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)


#define TEAM_MODE_PRIV_LONGS 4

#define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)


struct team {
	
struct net_device *dev; /* associated netdevice */
	
struct team_pcpu_stats __percpu *pcpu_stats;

	
struct mutex lock; /* used for overall locking, e.g. port lists write */

	/*
         * List of enabled ports and their count
         */
	
int en_port_count;
	
struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES];

	
struct list_head port_list; /* list of all ports */

	
struct list_head option_list;
	
struct list_head option_inst_list; /* list of option instances */

	
const struct team_mode *mode;
	
struct team_mode_ops ops;
	
bool user_carrier_enabled;
	
bool queue_override_enabled;
	
struct list_head *qom_lists; /* array of queue override mapping lists */
	
bool port_mtu_change_allowed;
	struct {
		
unsigned int count;
		
unsigned int interval; /* in ms */
		
atomic_t count_pending;
		
struct delayed_work dw;
	} 
notify_peers;
	struct {
		
unsigned int count;
		
unsigned int interval; /* in ms */
		
atomic_t count_pending;
		
struct delayed_work dw;
	} 
mcast_rejoin;
	
long mode_priv[TEAM_MODE_PRIV_LONGS];
};



static inline int team_dev_queue_xmit(struct team *team, struct team_port *port,
				      struct sk_buff *skb)
{
	BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
		     sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
	skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);

	skb->dev = port->dev;
	if (unlikely(netpoll_tx_running(team->dev))) {
		team_netpoll_send_skb(port, skb);
		return 0;
	}
	return dev_queue_xmit(skb);
}

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static inline struct hlist_head *team_port_index_hash(struct team *team,
						      int port_index)
{
	return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
}

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static inline struct team_port *team_get_port_by_index(struct team *team,
						       int port_index)
{
	struct team_port *port;
	struct hlist_head *head = team_port_index_hash(team, port_index);

	hlist_for_each_entry(port, head, hlist)
		if (port->index == port_index)
			return port;
	return NULL;
}

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static inline int team_num_to_port_index(struct team *team, int num)
{
	int en_port_count = ACCESS_ONCE(team->en_port_count);

	if (unlikely(!en_port_count))
		return 0;
	return num % en_port_count;
}

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static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
							   int port_index)
{
	struct team_port *port;
	struct hlist_head *head = team_port_index_hash(team, port_index);

	hlist_for_each_entry_rcu(port, head, hlist)
		if (port->index == port_index)
			return port;
	return NULL;
}

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static inline struct team_port *

team_get_first_port_txable_rcu(struct team *team, struct team_port *port)
{
	struct team_port *cur;

	if (likely(team_port_txable(port)))
		return port;
	cur = port;
	list_for_each_entry_continue_rcu(cur, &team->port_list, list)
		if (team_port_txable(cur))
			return cur;
	list_for_each_entry_rcu(cur, &team->port_list, list) {
		if (cur == port)
			break;
		if (team_port_txable(cur))
			return cur;
	}
	return NULL;
}

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extern int team_options_register(struct team *team,
				 const struct team_option *option,
				 size_t option_count);
extern void team_options_unregister(struct team *team,
				    const struct team_option *option,
				    size_t option_count);
extern int team_mode_register(const struct team_mode *mode);
extern void team_mode_unregister(const struct team_mode *mode);


#define TEAM_DEFAULT_NUM_TX_QUEUES 16

#define TEAM_DEFAULT_NUM_RX_QUEUES 16

#endif /* _LINUX_IF_TEAM_H_ */
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Directory: include/linux

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