[deliverable/linux.git] / 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_

#ifdef __KERNEL__

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;
};

struct team;

struct team_port {
	struct net_device *dev;
	struct hlist_node hlist; /* node in hash list */
	struct list_head list; /* node in ordinary list */
	struct team *team;
	int index;

	/*
	 * 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;

	bool linkup;
	u32 speed;
	u8 duplex;

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

	struct rcu_head rcu;
};

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_mac)(struct team *team, struct team_port *port);
};

enum team_option_type {
	TEAM_OPTION_TYPE_U32,
	TEAM_OPTION_TYPE_STRING,
	TEAM_OPTION_TYPE_BINARY,
};

struct team_gsetter_ctx {
	union {
		u32 u32_val;
		const char *str_val;
		struct {
			const void *ptr;
			u32 len;
		} bin_val;
	} data;
	struct team_port *port;
};

struct team_option {
	struct list_head list;
	const char *name;
	bool per_port;
	enum team_option_type type;
	int (*getter)(struct team *team, struct team_gsetter_ctx *ctx);
	int (*setter)(struct team *team, struct team_gsetter_ctx *ctx);
};

struct team_mode {
	struct list_head list;
	const char *kind;
	struct module *owner;
	size_t priv_size;
	const struct team_mode_ops *ops;
};

#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 */

	/*
	 * port lists with port count
	 */
	int port_count;
	struct hlist_head port_hlist[TEAM_PORT_HASHENTRIES];
	struct list_head port_list;

	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;
	long mode_priv[TEAM_MODE_PRIV_LONGS];
};

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

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

	hlist_for_each_entry(port, p, head, hlist)
		if (port->index == port_index)
			return port;
	return NULL;
}
static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
							   int port_index)
{
	struct hlist_node *p;
	struct team_port *port;
	struct hlist_head *head = team_port_index_hash(team, port_index);

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

extern int team_port_set_team_mac(struct team_port *port);
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(struct team_mode *mode);
extern int team_mode_unregister(struct team_mode *mode);

#endif /* __KERNEL__ */

#define TEAM_STRING_MAX_LEN 32

/**********************************
 * NETLINK_GENERIC netlink family.
 **********************************/

enum {
	TEAM_CMD_NOOP,
	TEAM_CMD_OPTIONS_SET,
	TEAM_CMD_OPTIONS_GET,
	TEAM_CMD_PORT_LIST_GET,

	__TEAM_CMD_MAX,
	TEAM_CMD_MAX = (__TEAM_CMD_MAX - 1),
};

enum {
	TEAM_ATTR_UNSPEC,
	TEAM_ATTR_TEAM_IFINDEX,		/* u32 */
	TEAM_ATTR_LIST_OPTION,		/* nest */
	TEAM_ATTR_LIST_PORT,		/* nest */

	__TEAM_ATTR_MAX,
	TEAM_ATTR_MAX = __TEAM_ATTR_MAX - 1,
};

/* Nested layout of get/set msg:
 *
 *	[TEAM_ATTR_LIST_OPTION]
 *		[TEAM_ATTR_ITEM_OPTION]
 *			[TEAM_ATTR_OPTION_*], ...
 *		[TEAM_ATTR_ITEM_OPTION]
 *			[TEAM_ATTR_OPTION_*], ...
 *		...
 *	[TEAM_ATTR_LIST_PORT]
 *		[TEAM_ATTR_ITEM_PORT]
 *			[TEAM_ATTR_PORT_*], ...
 *		[TEAM_ATTR_ITEM_PORT]
 *			[TEAM_ATTR_PORT_*], ...
 *		...
 */

enum {
	TEAM_ATTR_ITEM_OPTION_UNSPEC,
	TEAM_ATTR_ITEM_OPTION,		/* nest */

	__TEAM_ATTR_ITEM_OPTION_MAX,
	TEAM_ATTR_ITEM_OPTION_MAX = __TEAM_ATTR_ITEM_OPTION_MAX - 1,
};

enum {
	TEAM_ATTR_OPTION_UNSPEC,
	TEAM_ATTR_OPTION_NAME,		/* string */
	TEAM_ATTR_OPTION_CHANGED,	/* flag */
	TEAM_ATTR_OPTION_TYPE,		/* u8 */
	TEAM_ATTR_OPTION_DATA,		/* dynamic */
	TEAM_ATTR_OPTION_REMOVED,	/* flag */
	TEAM_ATTR_OPTION_PORT_IFINDEX,	/* u32 */ /* for per-port options */

	__TEAM_ATTR_OPTION_MAX,
	TEAM_ATTR_OPTION_MAX = __TEAM_ATTR_OPTION_MAX - 1,
};

enum {
	TEAM_ATTR_ITEM_PORT_UNSPEC,
	TEAM_ATTR_ITEM_PORT,		/* nest */

	__TEAM_ATTR_ITEM_PORT_MAX,
	TEAM_ATTR_ITEM_PORT_MAX = __TEAM_ATTR_ITEM_PORT_MAX - 1,
};

enum {
	TEAM_ATTR_PORT_UNSPEC,
	TEAM_ATTR_PORT_IFINDEX,		/* u32 */
	TEAM_ATTR_PORT_CHANGED,		/* flag */
	TEAM_ATTR_PORT_LINKUP,		/* flag */
	TEAM_ATTR_PORT_SPEED,		/* u32 */
	TEAM_ATTR_PORT_DUPLEX,		/* u8 */
	TEAM_ATTR_PORT_REMOVED,		/* flag */

	__TEAM_ATTR_PORT_MAX,
	TEAM_ATTR_PORT_MAX = __TEAM_ATTR_PORT_MAX - 1,
};

/*
 * NETLINK_GENERIC related info
 */
#define TEAM_GENL_NAME "team"
#define TEAM_GENL_VERSION 0x1
#define TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME "change_event"

#endif /* _LINUX_IF_TEAM_H_ */
Commit	Line	Data
3d249d4c JP	1	/*
	2	* include/linux/if_team.h - Network team device driver header
	3	* Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*/
	10
	11	#ifndef _LINUX_IF_TEAM_H_
	12	#define _LINUX_IF_TEAM_H_
	13
	14	#ifdef __KERNEL__
	15
	16	struct team_pcpu_stats {
	17	u64 rx_packets;
	18	u64 rx_bytes;
	19	u64 rx_multicast;
	20	u64 tx_packets;
	21	u64 tx_bytes;
	22	struct u64_stats_sync syncp;
	23	u32 rx_dropped;
	24	u32 tx_dropped;
	25	};
	26
	27	struct team;
	28
	29	struct team_port {
	30	struct net_device *dev;
	31	struct hlist_node hlist; /* node in hash list */
	32	struct list_head list; /* node in ordinary list */
	33	struct team *team;
	34	int index;
	35
	36	/*
	37	* A place for storing original values of the device before it
	38	* become a port.
	39	*/
	40	struct {
	41	unsigned char dev_addr[MAX_ADDR_LEN];
	42	unsigned int mtu;
	43	} orig;
	44
	45	bool linkup;
	46	u32 speed;
	47	u8 duplex;
	48
b82b9183 JP	49	/* Custom gennetlink interface related flags */
	50	bool changed;
	51	bool removed;
	52
3d249d4c JP	53	struct rcu_head rcu;
	54	};
	55
	56	struct team_mode_ops {
	57	int (init)(struct team team);
	58	void (exit)(struct team team);
	59	rx_handler_result_t (receive)(struct team team,
	60	struct team_port *port,
	61	struct sk_buff *skb);
	62	bool (transmit)(struct team team, struct sk_buff *skb);
	63	int (port_enter)(struct team team, struct team_port *port);
	64	void (port_leave)(struct team team, struct team_port *port);
	65	void (port_change_mac)(struct team team, struct team_port *port);
	66	};
	67
	68	enum team_option_type {
	69	TEAM_OPTION_TYPE_U32,
	70	TEAM_OPTION_TYPE_STRING,
2615598f	71	TEAM_OPTION_TYPE_BINARY,
3d249d4c JP	72	};
3d249d4c JP	73
80f7c668 JP	74	struct team_gsetter_ctx {
	75	union {
	76	u32 u32_val;
	77	const char *str_val;
	78	struct {
	79	const void *ptr;
	80	u32 len;
	81	} bin_val;
	82	} data;
	83	struct team_port *port;
	84	};
	85
3d249d4c JP	86	struct team_option {
	87	struct list_head list;
	88	const char *name;
80f7c668	89	bool per_port;
3d249d4c	90	enum team_option_type type;
80f7c668 JP	91	int (getter)(struct team team, struct team_gsetter_ctx *ctx);
80f7c668 JP	92	int (setter)(struct team team, struct team_gsetter_ctx *ctx);
3d249d4c JP	93	};
	94
	95	struct team_mode {
	96	struct list_head list;
	97	const char *kind;
	98	struct module *owner;
	99	size_t priv_size;
	100	const struct team_mode_ops *ops;
	101	};
	102
	103	#define TEAM_PORT_HASHBITS 4
	104	#define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
	105
	106	#define TEAM_MODE_PRIV_LONGS 4
	107	#define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
	108
	109	struct team {
	110	struct net_device dev; / associated netdevice */
	111	struct team_pcpu_stats __percpu *pcpu_stats;
	112
61dc3461	113	struct mutex lock; /* used for overall locking, e.g. port lists write */
3d249d4c JP	114
	115	/*
	116	* port lists with port count
	117	*/
	118	int port_count;
	119	struct hlist_head port_hlist[TEAM_PORT_HASHENTRIES];
	120	struct list_head port_list;
	121
	122	struct list_head option_list;
80f7c668	123	struct list_head option_inst_list; /* list of option instances */
3d249d4c JP	124
	125	const struct team_mode *mode;
	126	struct team_mode_ops ops;
	127	long mode_priv[TEAM_MODE_PRIV_LONGS];
	128	};
	129
	130	static inline struct hlist_head team_port_index_hash(struct team team,
	131	int port_index)
	132	{
	133	return &team->port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
	134	}
	135
	136	static inline struct team_port team_get_port_by_index(struct team team,
	137	int port_index)
	138	{
	139	struct hlist_node *p;
	140	struct team_port *port;
	141	struct hlist_head *head = team_port_index_hash(team, port_index);
	142
	143	hlist_for_each_entry(port, p, head, hlist)
	144	if (port->index == port_index)
	145	return port;
	146	return NULL;
	147	}
	148	static inline struct team_port team_get_port_by_index_rcu(struct team team,
	149	int port_index)
	150	{
	151	struct hlist_node *p;
	152	struct team_port *port;
	153	struct hlist_head *head = team_port_index_hash(team, port_index);
	154
	155	hlist_for_each_entry_rcu(port, p, head, hlist)
	156	if (port->index == port_index)
	157	return port;
	158	return NULL;
	159	}
	160
	161	extern int team_port_set_team_mac(struct team_port *port);
358b8382 JP	162	extern int team_options_register(struct team *team,
	163	const struct team_option *option,
	164	size_t option_count);
3d249d4c	165	extern void team_options_unregister(struct team *team,
358b8382	166	const struct team_option *option,
3d249d4c JP	167	size_t option_count);
	168	extern int team_mode_register(struct team_mode *mode);
	169	extern int team_mode_unregister(struct team_mode *mode);
	170
	171	#endif /* __KERNEL__ */
	172
	173	#define TEAM_STRING_MAX_LEN 32
	174
	175	/**********************************
	176	* NETLINK_GENERIC netlink family.
	177	**********************************/
	178
	179	enum {
	180	TEAM_CMD_NOOP,
	181	TEAM_CMD_OPTIONS_SET,
	182	TEAM_CMD_OPTIONS_GET,
	183	TEAM_CMD_PORT_LIST_GET,
	184
	185	__TEAM_CMD_MAX,
	186	TEAM_CMD_MAX = (__TEAM_CMD_MAX - 1),
	187	};
	188
	189	enum {
	190	TEAM_ATTR_UNSPEC,
	191	TEAM_ATTR_TEAM_IFINDEX, /* u32 */
	192	TEAM_ATTR_LIST_OPTION, /* nest */
	193	TEAM_ATTR_LIST_PORT, /* nest */
	194
	195	__TEAM_ATTR_MAX,
	196	TEAM_ATTR_MAX = __TEAM_ATTR_MAX - 1,
	197	};
	198
	199	/* Nested layout of get/set msg:
	200	*
	201	* [TEAM_ATTR_LIST_OPTION]
	202	* [TEAM_ATTR_ITEM_OPTION]
	203	* [TEAM_ATTR_OPTION_*], ...
	204	* [TEAM_ATTR_ITEM_OPTION]
	205	* [TEAM_ATTR_OPTION_*], ...
	206	* ...
	207	* [TEAM_ATTR_LIST_PORT]
	208	* [TEAM_ATTR_ITEM_PORT]
	209	* [TEAM_ATTR_PORT_*], ...
	210	* [TEAM_ATTR_ITEM_PORT]
	211	* [TEAM_ATTR_PORT_*], ...
	212	* ...
	213	*/
	214
	215	enum {
	216	TEAM_ATTR_ITEM_OPTION_UNSPEC,
	217	TEAM_ATTR_ITEM_OPTION, /* nest */
	218
	219	__TEAM_ATTR_ITEM_OPTION_MAX,
	220	TEAM_ATTR_ITEM_OPTION_MAX = __TEAM_ATTR_ITEM_OPTION_MAX - 1,
	221	};
	222
	223	enum {
	224	TEAM_ATTR_OPTION_UNSPEC,
	225	TEAM_ATTR_OPTION_NAME, /* string */
	226	TEAM_ATTR_OPTION_CHANGED, /* flag */
	227	TEAM_ATTR_OPTION_TYPE, /* u8 */
	228	TEAM_ATTR_OPTION_DATA, /* dynamic */
b82b9183	229	TEAM_ATTR_OPTION_REMOVED, /* flag */
80f7c668	230	TEAM_ATTR_OPTION_PORT_IFINDEX, /* u32 / / for per-port options */
3d249d4c JP	231
	232	__TEAM_ATTR_OPTION_MAX,
	233	TEAM_ATTR_OPTION_MAX = __TEAM_ATTR_OPTION_MAX - 1,
	234	};
	235
	236	enum {
	237	TEAM_ATTR_ITEM_PORT_UNSPEC,
	238	TEAM_ATTR_ITEM_PORT, /* nest */
	239
	240	__TEAM_ATTR_ITEM_PORT_MAX,
	241	TEAM_ATTR_ITEM_PORT_MAX = __TEAM_ATTR_ITEM_PORT_MAX - 1,
	242	};
	243
	244	enum {
	245	TEAM_ATTR_PORT_UNSPEC,
	246	TEAM_ATTR_PORT_IFINDEX, /* u32 */
	247	TEAM_ATTR_PORT_CHANGED, /* flag */
	248	TEAM_ATTR_PORT_LINKUP, /* flag */
	249	TEAM_ATTR_PORT_SPEED, /* u32 */
	250	TEAM_ATTR_PORT_DUPLEX, /* u8 */
b82b9183	251	TEAM_ATTR_PORT_REMOVED, /* flag */
3d249d4c JP	252
	253	__TEAM_ATTR_PORT_MAX,
	254	TEAM_ATTR_PORT_MAX = __TEAM_ATTR_PORT_MAX - 1,
	255	};
	256
	257	/*
	258	* NETLINK_GENERIC related info
	259	*/
	260	#define TEAM_GENL_NAME "team"
	261	#define TEAM_GENL_VERSION 0x1
	262	#define TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME "change_event"
	263
	264	#endif /* _LINUX_IF_TEAM_H_ */