[linux-block.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 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;

	struct rcu_head rcu;
	long mode_priv[0];
};

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,
	TEAM_OPTION_TYPE_BOOL,
};

struct team_gsetter_ctx {
	union {
		u32 u32_val;
		const char *str_val;
		struct {
			const void *ptr;
			u32 len;
		} bin_val;
		bool bool_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 {
	const char *kind;
	struct module *owner;
	size_t priv_size;
	size_t port_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 */

	/*
	 * 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;
	long mode_priv[TEAM_MODE_PRIV_LONGS];
};

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)];
}

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(const struct team_mode *mode);
extern void team_mode_unregister(const 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;
19a0b58e	31	struct hlist_node hlist; /* node in enabled ports hash list */
3d249d4c JP	32	struct list_head list; /* node in ordinary list */
3d249d4c JP	33	struct team *team;
19a0b58e	34	int index; /* index of enabled port. If disabled, it's set to -1 */
3d249d4c	35
71472ec1 JP	36	bool linkup; /* either state.linkup or user.linkup */
	37
	38	struct {
	39	bool linkup;
	40	u32 speed;
	41	u8 duplex;
	42	} state;
	43
	44	/* Values set by userspace */
	45	struct {
	46	bool linkup;
	47	bool linkup_enabled;
	48	} user;
	49
	50	/* Custom gennetlink interface related flags */
	51	bool changed;
	52	bool removed;
	53
3d249d4c JP	54	/*
	55	* A place for storing original values of the device before it
	56	* become a port.
	57	*/
	58	struct {
	59	unsigned char dev_addr[MAX_ADDR_LEN];
	60	unsigned int mtu;
	61	} orig;
	62
3d249d4c	63	struct rcu_head rcu;
5149ee58	64	long mode_priv[0];
3d249d4c JP	65	};
	66
	67	struct team_mode_ops {
	68	int (init)(struct team team);
	69	void (exit)(struct team team);
	70	rx_handler_result_t (receive)(struct team team,
	71	struct team_port *port,
	72	struct sk_buff *skb);
	73	bool (transmit)(struct team team, struct sk_buff *skb);
	74	int (port_enter)(struct team team, struct team_port *port);
	75	void (port_leave)(struct team team, struct team_port *port);
	76	void (port_change_mac)(struct team team, struct team_port *port);
	77	};
	78
	79	enum team_option_type {
	80	TEAM_OPTION_TYPE_U32,
	81	TEAM_OPTION_TYPE_STRING,
2615598f	82	TEAM_OPTION_TYPE_BINARY,
14f066ba	83	TEAM_OPTION_TYPE_BOOL,
3d249d4c JP	84	};
3d249d4c JP	85
80f7c668 JP	86	struct team_gsetter_ctx {
	87	union {
	88	u32 u32_val;
	89	const char *str_val;
	90	struct {
	91	const void *ptr;
	92	u32 len;
	93	} bin_val;
14f066ba	94	bool bool_val;
80f7c668 JP	95	} data;
	96	struct team_port *port;
	97	};
	98
3d249d4c JP	99	struct team_option {
	100	struct list_head list;
	101	const char *name;
80f7c668	102	bool per_port;
3d249d4c	103	enum team_option_type type;
80f7c668 JP	104	int (getter)(struct team team, struct team_gsetter_ctx *ctx);
80f7c668 JP	105	int (setter)(struct team team, struct team_gsetter_ctx *ctx);
3d249d4c JP	106	};
	107
	108	struct team_mode {
3d249d4c JP	109	const char *kind;
	110	struct module *owner;
	111	size_t priv_size;
5149ee58	112	size_t port_priv_size;
3d249d4c JP	113	const struct team_mode_ops *ops;
	114	};
	115
	116	#define TEAM_PORT_HASHBITS 4
	117	#define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
	118
	119	#define TEAM_MODE_PRIV_LONGS 4
	120	#define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
	121
	122	struct team {
	123	struct net_device dev; / associated netdevice */
	124	struct team_pcpu_stats __percpu *pcpu_stats;
	125
61dc3461	126	struct mutex lock; /* used for overall locking, e.g. port lists write */
3d249d4c JP	127
3d249d4c JP	128	/*
19a0b58e	129	* List of enabled ports and their count
3d249d4c	130	*/
19a0b58e JP	131	int en_port_count;
	132	struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES];
	133
	134	struct list_head port_list; /* list of all ports */
3d249d4c JP	135
3d249d4c JP	136	struct list_head option_list;
80f7c668	137	struct list_head option_inst_list; /* list of option instances */
3d249d4c JP	138
	139	const struct team_mode *mode;
	140	struct team_mode_ops ops;
	141	long mode_priv[TEAM_MODE_PRIV_LONGS];
	142	};
	143
	144	static inline struct hlist_head team_port_index_hash(struct team team,
	145	int port_index)
	146	{
19a0b58e	147	return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
3d249d4c JP	148	}
	149
	150	static inline struct team_port team_get_port_by_index(struct team team,
	151	int port_index)
	152	{
	153	struct hlist_node *p;
	154	struct team_port *port;
	155	struct hlist_head *head = team_port_index_hash(team, port_index);
	156
	157	hlist_for_each_entry(port, p, head, hlist)
	158	if (port->index == port_index)
	159	return port;
	160	return NULL;
	161	}
	162	static inline struct team_port team_get_port_by_index_rcu(struct team team,
	163	int port_index)
	164	{
	165	struct hlist_node *p;
	166	struct team_port *port;
	167	struct hlist_head *head = team_port_index_hash(team, port_index);
	168
	169	hlist_for_each_entry_rcu(port, p, head, hlist)
	170	if (port->index == port_index)
	171	return port;
	172	return NULL;
	173	}
	174
	175	extern int team_port_set_team_mac(struct team_port *port);
358b8382 JP	176	extern int team_options_register(struct team *team,
	177	const struct team_option *option,
	178	size_t option_count);
3d249d4c	179	extern void team_options_unregister(struct team *team,
358b8382	180	const struct team_option *option,
3d249d4c	181	size_t option_count);
0402788a JP	182	extern int team_mode_register(const struct team_mode *mode);
0402788a JP	183	extern void team_mode_unregister(const struct team_mode *mode);
3d249d4c JP	184
	185	#endif /* __KERNEL__ */
	186
	187	#define TEAM_STRING_MAX_LEN 32
	188
	189	/**********************************
	190	* NETLINK_GENERIC netlink family.
	191	**********************************/
	192
	193	enum {
	194	TEAM_CMD_NOOP,
	195	TEAM_CMD_OPTIONS_SET,
	196	TEAM_CMD_OPTIONS_GET,
	197	TEAM_CMD_PORT_LIST_GET,
	198
	199	__TEAM_CMD_MAX,
	200	TEAM_CMD_MAX = (__TEAM_CMD_MAX - 1),
	201	};
	202
	203	enum {
	204	TEAM_ATTR_UNSPEC,
	205	TEAM_ATTR_TEAM_IFINDEX, /* u32 */
	206	TEAM_ATTR_LIST_OPTION, /* nest */
	207	TEAM_ATTR_LIST_PORT, /* nest */
	208
	209	__TEAM_ATTR_MAX,
	210	TEAM_ATTR_MAX = __TEAM_ATTR_MAX - 1,
	211	};
	212
	213	/* Nested layout of get/set msg:
	214	*
	215	* [TEAM_ATTR_LIST_OPTION]
	216	* [TEAM_ATTR_ITEM_OPTION]
	217	* [TEAM_ATTR_OPTION_*], ...
	218	* [TEAM_ATTR_ITEM_OPTION]
	219	* [TEAM_ATTR_OPTION_*], ...
	220	* ...
	221	* [TEAM_ATTR_LIST_PORT]
	222	* [TEAM_ATTR_ITEM_PORT]
	223	* [TEAM_ATTR_PORT_*], ...
	224	* [TEAM_ATTR_ITEM_PORT]
	225	* [TEAM_ATTR_PORT_*], ...
	226	* ...
	227	*/
	228
	229	enum {
	230	TEAM_ATTR_ITEM_OPTION_UNSPEC,
	231	TEAM_ATTR_ITEM_OPTION, /* nest */
	232
	233	__TEAM_ATTR_ITEM_OPTION_MAX,
	234	TEAM_ATTR_ITEM_OPTION_MAX = __TEAM_ATTR_ITEM_OPTION_MAX - 1,
	235	};
	236
	237	enum {
	238	TEAM_ATTR_OPTION_UNSPEC,
	239	TEAM_ATTR_OPTION_NAME, /* string */
	240	TEAM_ATTR_OPTION_CHANGED, /* flag */
	241	TEAM_ATTR_OPTION_TYPE, /* u8 */
	242	TEAM_ATTR_OPTION_DATA, /* dynamic */
b82b9183	243	TEAM_ATTR_OPTION_REMOVED, /* flag */
80f7c668	244	TEAM_ATTR_OPTION_PORT_IFINDEX, /* u32 / / for per-port options */
3d249d4c JP	245
	246	__TEAM_ATTR_OPTION_MAX,
	247	TEAM_ATTR_OPTION_MAX = __TEAM_ATTR_OPTION_MAX - 1,
	248	};
	249
	250	enum {
	251	TEAM_ATTR_ITEM_PORT_UNSPEC,
	252	TEAM_ATTR_ITEM_PORT, /* nest */
	253
	254	__TEAM_ATTR_ITEM_PORT_MAX,
	255	TEAM_ATTR_ITEM_PORT_MAX = __TEAM_ATTR_ITEM_PORT_MAX - 1,
	256	};
	257
	258	enum {
	259	TEAM_ATTR_PORT_UNSPEC,
	260	TEAM_ATTR_PORT_IFINDEX, /* u32 */
	261	TEAM_ATTR_PORT_CHANGED, /* flag */
	262	TEAM_ATTR_PORT_LINKUP, /* flag */
	263	TEAM_ATTR_PORT_SPEED, /* u32 */
	264	TEAM_ATTR_PORT_DUPLEX, /* u8 */
b82b9183	265	TEAM_ATTR_PORT_REMOVED, /* flag */
3d249d4c JP	266
	267	__TEAM_ATTR_PORT_MAX,
	268	TEAM_ATTR_PORT_MAX = __TEAM_ATTR_PORT_MAX - 1,
	269	};
	270
	271	/*
	272	* NETLINK_GENERIC related info
	273	*/
	274	#define TEAM_GENL_NAME "team"
	275	#define TEAM_GENL_VERSION 0x1
	276	#define TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME "change_event"
	277
	278	#endif /* _LINUX_IF_TEAM_H_ */