cregit-Linux how code gets into the kernel

Release 4.7 include/linux/if_team.h

Directory: include/linux
/*
 * 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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