[deliverable/linux.git] / drivers / net / team / team_mode_loadbalance.c

/*
 * drivers/net/team/team_mode_loadbalance.c - Load-balancing mode for team
 * Copyright (c) 2012 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.
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/filter.h>
#include <linux/if_team.h>

struct lb_priv;

typedef struct team_port *lb_select_tx_port_func_t(struct team *,
						   struct lb_priv *,
						   struct sk_buff *,
						   unsigned char);

#define LB_TX_HASHTABLE_SIZE 256 /* hash is a char */

struct lb_stats {
	u64 tx_bytes;
};

struct lb_pcpu_stats {
	struct lb_stats hash_stats[LB_TX_HASHTABLE_SIZE];
	struct u64_stats_sync syncp;
};

struct lb_stats_info {
	struct lb_stats stats;
	struct lb_stats last_stats;
	struct team_option_inst_info *opt_inst_info;
};

struct lb_port_mapping {
	struct team_port __rcu *port;
	struct team_option_inst_info *opt_inst_info;
};

struct lb_priv_ex {
	struct team *team;
	struct lb_port_mapping tx_hash_to_port_mapping[LB_TX_HASHTABLE_SIZE];
	struct sock_fprog_kern *orig_fprog;
	struct {
		unsigned int refresh_interval; /* in tenths of second */
		struct delayed_work refresh_dw;
		struct lb_stats_info info[LB_TX_HASHTABLE_SIZE];
	} stats;
};

struct lb_priv {
	struct sk_filter __rcu *fp;
	lb_select_tx_port_func_t __rcu *select_tx_port_func;
	struct lb_pcpu_stats __percpu *pcpu_stats;
	struct lb_priv_ex *ex; /* priv extension */
};

static struct lb_priv *get_lb_priv(struct team *team)
{
	return (struct lb_priv *) &team->mode_priv;
}

struct lb_port_priv {
	struct lb_stats __percpu *pcpu_stats;
	struct lb_stats_info stats_info;
};

static struct lb_port_priv *get_lb_port_priv(struct team_port *port)
{
	return (struct lb_port_priv *) &port->mode_priv;
}

#define LB_HTPM_PORT_BY_HASH(lp_priv, hash) \
	(lb_priv)->ex->tx_hash_to_port_mapping[hash].port

#define LB_HTPM_OPT_INST_INFO_BY_HASH(lp_priv, hash) \
	(lb_priv)->ex->tx_hash_to_port_mapping[hash].opt_inst_info

static void lb_tx_hash_to_port_mapping_null_port(struct team *team,
						 struct team_port *port)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	bool changed = false;
	int i;

	for (i = 0; i < LB_TX_HASHTABLE_SIZE; i++) {
		struct lb_port_mapping *pm;

		pm = &lb_priv->ex->tx_hash_to_port_mapping[i];
		if (rcu_access_pointer(pm->port) == port) {
			RCU_INIT_POINTER(pm->port, NULL);
			team_option_inst_set_change(pm->opt_inst_info);
			changed = true;
		}
	}
	if (changed)
		team_options_change_check(team);
}

/* Basic tx selection based solely by hash */
static struct team_port *lb_hash_select_tx_port(struct team *team,
						struct lb_priv *lb_priv,
						struct sk_buff *skb,
						unsigned char hash)
{
	int port_index = team_num_to_port_index(team, hash);

	return team_get_port_by_index_rcu(team, port_index);
}

/* Hash to port mapping select tx port */
static struct team_port *lb_htpm_select_tx_port(struct team *team,
						struct lb_priv *lb_priv,
						struct sk_buff *skb,
						unsigned char hash)
{
	return rcu_dereference_bh(LB_HTPM_PORT_BY_HASH(lb_priv, hash));
}

struct lb_select_tx_port {
	char *name;
	lb_select_tx_port_func_t *func;
};

static const struct lb_select_tx_port lb_select_tx_port_list[] = {
	{
		.name = "hash",
		.func = lb_hash_select_tx_port,
	},
	{
		.name = "hash_to_port_mapping",
		.func = lb_htpm_select_tx_port,
	},
};
#define LB_SELECT_TX_PORT_LIST_COUNT ARRAY_SIZE(lb_select_tx_port_list)

static char *lb_select_tx_port_get_name(lb_select_tx_port_func_t *func)
{
	int i;

	for (i = 0; i < LB_SELECT_TX_PORT_LIST_COUNT; i++) {
		const struct lb_select_tx_port *item;

		item = &lb_select_tx_port_list[i];
		if (item->func == func)
			return item->name;
	}
	return NULL;
}

static lb_select_tx_port_func_t *lb_select_tx_port_get_func(const char *name)
{
	int i;

	for (i = 0; i < LB_SELECT_TX_PORT_LIST_COUNT; i++) {
		const struct lb_select_tx_port *item;

		item = &lb_select_tx_port_list[i];
		if (!strcmp(item->name, name))
			return item->func;
	}
	return NULL;
}

static unsigned int lb_get_skb_hash(struct lb_priv *lb_priv,
				    struct sk_buff *skb)
{
	struct sk_filter *fp;
	uint32_t lhash;
	unsigned char *c;

	fp = rcu_dereference_bh(lb_priv->fp);
	if (unlikely(!fp))
		return 0;
	lhash = SK_RUN_FILTER(fp, skb);
	c = (char *) &lhash;
	return c[0] ^ c[1] ^ c[2] ^ c[3];
}

static void lb_update_tx_stats(unsigned int tx_bytes, struct lb_priv *lb_priv,
			       struct lb_port_priv *lb_port_priv,
			       unsigned char hash)
{
	struct lb_pcpu_stats *pcpu_stats;
	struct lb_stats *port_stats;
	struct lb_stats *hash_stats;

	pcpu_stats = this_cpu_ptr(lb_priv->pcpu_stats);
	port_stats = this_cpu_ptr(lb_port_priv->pcpu_stats);
	hash_stats = &pcpu_stats->hash_stats[hash];
	u64_stats_update_begin(&pcpu_stats->syncp);
	port_stats->tx_bytes += tx_bytes;
	hash_stats->tx_bytes += tx_bytes;
	u64_stats_update_end(&pcpu_stats->syncp);
}

static bool lb_transmit(struct team *team, struct sk_buff *skb)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	lb_select_tx_port_func_t *select_tx_port_func;
	struct team_port *port;
	unsigned char hash;
	unsigned int tx_bytes = skb->len;

	hash = lb_get_skb_hash(lb_priv, skb);
	select_tx_port_func = rcu_dereference_bh(lb_priv->select_tx_port_func);
	port = select_tx_port_func(team, lb_priv, skb, hash);
	if (unlikely(!port))
		goto drop;
	if (team_dev_queue_xmit(team, port, skb))
		return false;
	lb_update_tx_stats(tx_bytes, lb_priv, get_lb_port_priv(port), hash);
	return true;

drop:
	dev_kfree_skb_any(skb);
	return false;
}

static int lb_bpf_func_get(struct team *team, struct team_gsetter_ctx *ctx)
{
	struct lb_priv *lb_priv = get_lb_priv(team);

	if (!lb_priv->ex->orig_fprog) {
		ctx->data.bin_val.len = 0;
		ctx->data.bin_val.ptr = NULL;
		return 0;
	}
	ctx->data.bin_val.len = lb_priv->ex->orig_fprog->len *
				sizeof(struct sock_filter);
	ctx->data.bin_val.ptr = lb_priv->ex->orig_fprog->filter;
	return 0;
}

static int __fprog_create(struct sock_fprog_kern **pfprog, u32 data_len,
			  const void *data)
{
	struct sock_fprog_kern *fprog;
	struct sock_filter *filter = (struct sock_filter *) data;

	if (data_len % sizeof(struct sock_filter))
		return -EINVAL;
	fprog = kmalloc(sizeof(*fprog), GFP_KERNEL);
	if (!fprog)
		return -ENOMEM;
	fprog->filter = kmemdup(filter, data_len, GFP_KERNEL);
	if (!fprog->filter) {
		kfree(fprog);
		return -ENOMEM;
	}
	fprog->len = data_len / sizeof(struct sock_filter);
	*pfprog = fprog;
	return 0;
}

static void __fprog_destroy(struct sock_fprog_kern *fprog)
{
	kfree(fprog->filter);
	kfree(fprog);
}

static int lb_bpf_func_set(struct team *team, struct team_gsetter_ctx *ctx)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	struct sk_filter *fp = NULL;
	struct sk_filter *orig_fp;
	struct sock_fprog_kern *fprog = NULL;
	int err;

	if (ctx->data.bin_val.len) {
		err = __fprog_create(&fprog, ctx->data.bin_val.len,
				     ctx->data.bin_val.ptr);
		if (err)
			return err;
		err = sk_unattached_filter_create(&fp, fprog);
		if (err) {
			__fprog_destroy(fprog);
			return err;
		}
	}

	if (lb_priv->ex->orig_fprog) {
		/* Clear old filter data */
		__fprog_destroy(lb_priv->ex->orig_fprog);
		orig_fp = rcu_dereference_protected(lb_priv->fp,
						lockdep_is_held(&team->lock));
		sk_unattached_filter_destroy(orig_fp);
	}

	rcu_assign_pointer(lb_priv->fp, fp);
	lb_priv->ex->orig_fprog = fprog;
	return 0;
}

static int lb_tx_method_get(struct team *team, struct team_gsetter_ctx *ctx)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	lb_select_tx_port_func_t *func;
	char *name;

	func = rcu_dereference_protected(lb_priv->select_tx_port_func,
					 lockdep_is_held(&team->lock));
	name = lb_select_tx_port_get_name(func);
	BUG_ON(!name);
	ctx->data.str_val = name;
	return 0;
}

static int lb_tx_method_set(struct team *team, struct team_gsetter_ctx *ctx)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	lb_select_tx_port_func_t *func;

	func = lb_select_tx_port_get_func(ctx->data.str_val);
	if (!func)
		return -EINVAL;
	rcu_assign_pointer(lb_priv->select_tx_port_func, func);
	return 0;
}

static int lb_tx_hash_to_port_mapping_init(struct team *team,
					   struct team_option_inst_info *info)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	unsigned char hash = info->array_index;

	LB_HTPM_OPT_INST_INFO_BY_HASH(lb_priv, hash) = info;
	return 0;
}

static int lb_tx_hash_to_port_mapping_get(struct team *team,
					  struct team_gsetter_ctx *ctx)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	struct team_port *port;
	unsigned char hash = ctx->info->array_index;

	port = LB_HTPM_PORT_BY_HASH(lb_priv, hash);
	ctx->data.u32_val = port ? port->dev->ifindex : 0;
	return 0;
}

static int lb_tx_hash_to_port_mapping_set(struct team *team,
					  struct team_gsetter_ctx *ctx)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	struct team_port *port;
	unsigned char hash = ctx->info->array_index;

	list_for_each_entry(port, &team->port_list, list) {
		if (ctx->data.u32_val == port->dev->ifindex &&
		    team_port_enabled(port)) {
			rcu_assign_pointer(LB_HTPM_PORT_BY_HASH(lb_priv, hash),
					   port);
			return 0;
		}
	}
	return -ENODEV;
}

static int lb_hash_stats_init(struct team *team,
			      struct team_option_inst_info *info)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	unsigned char hash = info->array_index;

	lb_priv->ex->stats.info[hash].opt_inst_info = info;
	return 0;
}

static int lb_hash_stats_get(struct team *team, struct team_gsetter_ctx *ctx)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	unsigned char hash = ctx->info->array_index;

	ctx->data.bin_val.ptr = &lb_priv->ex->stats.info[hash].stats;
	ctx->data.bin_val.len = sizeof(struct lb_stats);
	return 0;
}

static int lb_port_stats_init(struct team *team,
			      struct team_option_inst_info *info)
{
	struct team_port *port = info->port;
	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);

	lb_port_priv->stats_info.opt_inst_info = info;
	return 0;
}

static int lb_port_stats_get(struct team *team, struct team_gsetter_ctx *ctx)
{
	struct team_port *port = ctx->info->port;
	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);

	ctx->data.bin_val.ptr = &lb_port_priv->stats_info.stats;
	ctx->data.bin_val.len = sizeof(struct lb_stats);
	return 0;
}

static void __lb_stats_info_refresh_prepare(struct lb_stats_info *s_info)
{
	memcpy(&s_info->last_stats, &s_info->stats, sizeof(struct lb_stats));
	memset(&s_info->stats, 0, sizeof(struct lb_stats));
}

static bool __lb_stats_info_refresh_check(struct lb_stats_info *s_info,
					  struct team *team)
{
	if (memcmp(&s_info->last_stats, &s_info->stats,
	    sizeof(struct lb_stats))) {
		team_option_inst_set_change(s_info->opt_inst_info);
		return true;
	}
	return false;
}

static void __lb_one_cpu_stats_add(struct lb_stats *acc_stats,
				   struct lb_stats *cpu_stats,
				   struct u64_stats_sync *syncp)
{
	unsigned int start;
	struct lb_stats tmp;

	do {
		start = u64_stats_fetch_begin_irq(syncp);
		tmp.tx_bytes = cpu_stats->tx_bytes;
	} while (u64_stats_fetch_retry_irq(syncp, start));
	acc_stats->tx_bytes += tmp.tx_bytes;
}

static void lb_stats_refresh(struct work_struct *work)
{
	struct team *team;
	struct lb_priv *lb_priv;
	struct lb_priv_ex *lb_priv_ex;
	struct lb_pcpu_stats *pcpu_stats;
	struct lb_stats *stats;
	struct lb_stats_info *s_info;
	struct team_port *port;
	bool changed = false;
	int i;
	int j;

	lb_priv_ex = container_of(work, struct lb_priv_ex,
				  stats.refresh_dw.work);

	team = lb_priv_ex->team;
	lb_priv = get_lb_priv(team);

	if (!mutex_trylock(&team->lock)) {
		schedule_delayed_work(&lb_priv_ex->stats.refresh_dw, 0);
		return;
	}

	for (j = 0; j < LB_TX_HASHTABLE_SIZE; j++) {
		s_info = &lb_priv->ex->stats.info[j];
		__lb_stats_info_refresh_prepare(s_info);
		for_each_possible_cpu(i) {
			pcpu_stats = per_cpu_ptr(lb_priv->pcpu_stats, i);
			stats = &pcpu_stats->hash_stats[j];
			__lb_one_cpu_stats_add(&s_info->stats, stats,
					       &pcpu_stats->syncp);
		}
		changed |= __lb_stats_info_refresh_check(s_info, team);
	}

	list_for_each_entry(port, &team->port_list, list) {
		struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);

		s_info = &lb_port_priv->stats_info;
		__lb_stats_info_refresh_prepare(s_info);
		for_each_possible_cpu(i) {
			pcpu_stats = per_cpu_ptr(lb_priv->pcpu_stats, i);
			stats = per_cpu_ptr(lb_port_priv->pcpu_stats, i);
			__lb_one_cpu_stats_add(&s_info->stats, stats,
					       &pcpu_stats->syncp);
		}
		changed |= __lb_stats_info_refresh_check(s_info, team);
	}

	if (changed)
		team_options_change_check(team);

	schedule_delayed_work(&lb_priv_ex->stats.refresh_dw,
			      (lb_priv_ex->stats.refresh_interval * HZ) / 10);

	mutex_unlock(&team->lock);
}

static int lb_stats_refresh_interval_get(struct team *team,
					 struct team_gsetter_ctx *ctx)
{
	struct lb_priv *lb_priv = get_lb_priv(team);

	ctx->data.u32_val = lb_priv->ex->stats.refresh_interval;
	return 0;
}

static int lb_stats_refresh_interval_set(struct team *team,
					 struct team_gsetter_ctx *ctx)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	unsigned int interval;

	interval = ctx->data.u32_val;
	if (lb_priv->ex->stats.refresh_interval == interval)
		return 0;
	lb_priv->ex->stats.refresh_interval = interval;
	if (interval)
		schedule_delayed_work(&lb_priv->ex->stats.refresh_dw, 0);
	else
		cancel_delayed_work(&lb_priv->ex->stats.refresh_dw);
	return 0;
}

static const struct team_option lb_options[] = {
	{
		.name = "bpf_hash_func",
		.type = TEAM_OPTION_TYPE_BINARY,
		.getter = lb_bpf_func_get,
		.setter = lb_bpf_func_set,
	},
	{
		.name = "lb_tx_method",
		.type = TEAM_OPTION_TYPE_STRING,
		.getter = lb_tx_method_get,
		.setter = lb_tx_method_set,
	},
	{
		.name = "lb_tx_hash_to_port_mapping",
		.array_size = LB_TX_HASHTABLE_SIZE,
		.type = TEAM_OPTION_TYPE_U32,
		.init = lb_tx_hash_to_port_mapping_init,
		.getter = lb_tx_hash_to_port_mapping_get,
		.setter = lb_tx_hash_to_port_mapping_set,
	},
	{
		.name = "lb_hash_stats",
		.array_size = LB_TX_HASHTABLE_SIZE,
		.type = TEAM_OPTION_TYPE_BINARY,
		.init = lb_hash_stats_init,
		.getter = lb_hash_stats_get,
	},
	{
		.name = "lb_port_stats",
		.per_port = true,
		.type = TEAM_OPTION_TYPE_BINARY,
		.init = lb_port_stats_init,
		.getter = lb_port_stats_get,
	},
	{
		.name = "lb_stats_refresh_interval",
		.type = TEAM_OPTION_TYPE_U32,
		.getter = lb_stats_refresh_interval_get,
		.setter = lb_stats_refresh_interval_set,
	},
};

static int lb_init(struct team *team)
{
	struct lb_priv *lb_priv = get_lb_priv(team);
	lb_select_tx_port_func_t *func;
	int i, err;

	/* set default tx port selector */
	func = lb_select_tx_port_get_func("hash");
	BUG_ON(!func);
	rcu_assign_pointer(lb_priv->select_tx_port_func, func);

	lb_priv->ex = kzalloc(sizeof(*lb_priv->ex), GFP_KERNEL);
	if (!lb_priv->ex)
		return -ENOMEM;
	lb_priv->ex->team = team;

	lb_priv->pcpu_stats = alloc_percpu(struct lb_pcpu_stats);
	if (!lb_priv->pcpu_stats) {
		err = -ENOMEM;
		goto err_alloc_pcpu_stats;
	}

	for_each_possible_cpu(i) {
		struct lb_pcpu_stats *team_lb_stats;
		team_lb_stats = per_cpu_ptr(lb_priv->pcpu_stats, i);
		u64_stats_init(&team_lb_stats->syncp);
	}


	INIT_DELAYED_WORK(&lb_priv->ex->stats.refresh_dw, lb_stats_refresh);

	err = team_options_register(team, lb_options, ARRAY_SIZE(lb_options));
	if (err)
		goto err_options_register;
	return 0;

err_options_register:
	free_percpu(lb_priv->pcpu_stats);
err_alloc_pcpu_stats:
	kfree(lb_priv->ex);
	return err;
}

static void lb_exit(struct team *team)
{
	struct lb_priv *lb_priv = get_lb_priv(team);

	team_options_unregister(team, lb_options,
				ARRAY_SIZE(lb_options));
	cancel_delayed_work_sync(&lb_priv->ex->stats.refresh_dw);
	free_percpu(lb_priv->pcpu_stats);
	kfree(lb_priv->ex);
}

static int lb_port_enter(struct team *team, struct team_port *port)
{
	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);

	lb_port_priv->pcpu_stats = alloc_percpu(struct lb_stats);
	if (!lb_port_priv->pcpu_stats)
		return -ENOMEM;
	return 0;
}

static void lb_port_leave(struct team *team, struct team_port *port)
{
	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);

	free_percpu(lb_port_priv->pcpu_stats);
}

static void lb_port_disabled(struct team *team, struct team_port *port)
{
	lb_tx_hash_to_port_mapping_null_port(team, port);
}

static const struct team_mode_ops lb_mode_ops = {
	.init			= lb_init,
	.exit			= lb_exit,
	.port_enter		= lb_port_enter,
	.port_leave		= lb_port_leave,
	.port_disabled		= lb_port_disabled,
	.transmit		= lb_transmit,
};

static const struct team_mode lb_mode = {
	.kind		= "loadbalance",
	.owner		= THIS_MODULE,
	.priv_size	= sizeof(struct lb_priv),
	.port_priv_size	= sizeof(struct lb_port_priv),
	.ops		= &lb_mode_ops,
};

static int __init lb_init_module(void)
{
	return team_mode_register(&lb_mode);
}

static void __exit lb_cleanup_module(void)
{
	team_mode_unregister(&lb_mode);
}

module_init(lb_init_module);
module_exit(lb_cleanup_module);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
MODULE_DESCRIPTION("Load-balancing mode for team");
MODULE_ALIAS("team-mode-loadbalance");
Commit	Line	Data
01d7f30a JP	1	/*
	2	* drivers/net/team/team_mode_loadbalance.c - Load-balancing mode for team
	3	* Copyright (c) 2012 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	#include <linux/kernel.h>
	12	#include <linux/types.h>
	13	#include <linux/module.h>
	14	#include <linux/init.h>
	15	#include <linux/errno.h>
	16	#include <linux/netdevice.h>
	17	#include <linux/filter.h>
	18	#include <linux/if_team.h>
	19
ab8250d7 JP	20	struct lb_priv;
	21
	22	typedef struct team_port lb_select_tx_port_func_t(struct team ,
	23	struct lb_priv *,
	24	struct sk_buff *,
	25	unsigned char);
	26
	27	#define LB_TX_HASHTABLE_SIZE 256 /* hash is a char */
	28
	29	struct lb_stats {
	30	u64 tx_bytes;
	31	};
	32
	33	struct lb_pcpu_stats {
	34	struct lb_stats hash_stats[LB_TX_HASHTABLE_SIZE];
	35	struct u64_stats_sync syncp;
	36	};
	37
	38	struct lb_stats_info {
	39	struct lb_stats stats;
	40	struct lb_stats last_stats;
	41	struct team_option_inst_info *opt_inst_info;
	42	};
	43
	44	struct lb_port_mapping {
	45	struct team_port __rcu *port;
	46	struct team_option_inst_info *opt_inst_info;
	47	};
	48
	49	struct lb_priv_ex {
	50	struct team *team;
	51	struct lb_port_mapping tx_hash_to_port_mapping[LB_TX_HASHTABLE_SIZE];
b1fcd35c	52	struct sock_fprog_kern *orig_fprog;
ab8250d7 JP	53	struct {
	54	unsigned int refresh_interval; /* in tenths of second */
	55	struct delayed_work refresh_dw;
	56	struct lb_stats_info info[LB_TX_HASHTABLE_SIZE];
	57	} stats;
	58	};
	59
01d7f30a JP	60	struct lb_priv {
01d7f30a JP	61	struct sk_filter __rcu *fp;
ab8250d7 JP	62	lb_select_tx_port_func_t __rcu *select_tx_port_func;
	63	struct lb_pcpu_stats __percpu *pcpu_stats;
	64	struct lb_priv_ex ex; / priv extension */
01d7f30a JP	65	};
01d7f30a JP	66
ab8250d7	67	static struct lb_priv get_lb_priv(struct team team)
01d7f30a JP	68	{
	69	return (struct lb_priv *) &team->mode_priv;
	70	}
	71
ab8250d7 JP	72	struct lb_port_priv {
	73	struct lb_stats __percpu *pcpu_stats;
	74	struct lb_stats_info stats_info;
	75	};
	76
	77	static struct lb_port_priv get_lb_port_priv(struct team_port port)
	78	{
	79	return (struct lb_port_priv *) &port->mode_priv;
	80	}
	81
	82	#define LB_HTPM_PORT_BY_HASH(lp_priv, hash) \
	83	(lb_priv)->ex->tx_hash_to_port_mapping[hash].port
	84
	85	#define LB_HTPM_OPT_INST_INFO_BY_HASH(lp_priv, hash) \
	86	(lb_priv)->ex->tx_hash_to_port_mapping[hash].opt_inst_info
	87
	88	static void lb_tx_hash_to_port_mapping_null_port(struct team *team,
	89	struct team_port *port)
	90	{
	91	struct lb_priv *lb_priv = get_lb_priv(team);
	92	bool changed = false;
	93	int i;
	94
	95	for (i = 0; i < LB_TX_HASHTABLE_SIZE; i++) {
	96	struct lb_port_mapping *pm;
	97
	98	pm = &lb_priv->ex->tx_hash_to_port_mapping[i];
6dab015c JP	99	if (rcu_access_pointer(pm->port) == port) {
6dab015c JP	100	RCU_INIT_POINTER(pm->port, NULL);
ab8250d7 JP	101	team_option_inst_set_change(pm->opt_inst_info);
	102	changed = true;
	103	}
	104	}
	105	if (changed)
	106	team_options_change_check(team);
	107	}
	108
	109	/* Basic tx selection based solely by hash */
	110	static struct team_port lb_hash_select_tx_port(struct team team,
	111	struct lb_priv *lb_priv,
	112	struct sk_buff *skb,
	113	unsigned char hash)
	114	{
735d381f	115	int port_index = team_num_to_port_index(team, hash);
ab8250d7	116
ab8250d7 JP	117	return team_get_port_by_index_rcu(team, port_index);
	118	}
	119
	120	/* Hash to port mapping select tx port */
	121	static struct team_port lb_htpm_select_tx_port(struct team team,
	122	struct lb_priv *lb_priv,
	123	struct sk_buff *skb,
	124	unsigned char hash)
	125	{
d1904fbd	126	return rcu_dereference_bh(LB_HTPM_PORT_BY_HASH(lb_priv, hash));
ab8250d7 JP	127	}
	128
	129	struct lb_select_tx_port {
	130	char *name;
	131	lb_select_tx_port_func_t *func;
	132	};
	133
	134	static const struct lb_select_tx_port lb_select_tx_port_list[] = {
	135	{
	136	.name = "hash",
	137	.func = lb_hash_select_tx_port,
	138	},
	139	{
	140	.name = "hash_to_port_mapping",
	141	.func = lb_htpm_select_tx_port,
	142	},
	143	};
	144	#define LB_SELECT_TX_PORT_LIST_COUNT ARRAY_SIZE(lb_select_tx_port_list)
	145
	146	static char lb_select_tx_port_get_name(lb_select_tx_port_func_t func)
	147	{
	148	int i;
	149
	150	for (i = 0; i < LB_SELECT_TX_PORT_LIST_COUNT; i++) {
	151	const struct lb_select_tx_port *item;
	152
	153	item = &lb_select_tx_port_list[i];
	154	if (item->func == func)
	155	return item->name;
	156	}
	157	return NULL;
	158	}
	159
	160	static lb_select_tx_port_func_t lb_select_tx_port_get_func(const char name)
	161	{
	162	int i;
	163
	164	for (i = 0; i < LB_SELECT_TX_PORT_LIST_COUNT; i++) {
	165	const struct lb_select_tx_port *item;
	166
	167	item = &lb_select_tx_port_list[i];
	168	if (!strcmp(item->name, name))
	169	return item->func;
	170	}
	171	return NULL;
	172	}
	173
	174	static unsigned int lb_get_skb_hash(struct lb_priv *lb_priv,
	175	struct sk_buff *skb)
01d7f30a JP	176	{
01d7f30a JP	177	struct sk_filter *fp;
596e2024 JP	178	uint32_t lhash;
	179	unsigned char *c;
	180
d1904fbd	181	fp = rcu_dereference_bh(lb_priv->fp);
596e2024 JP	182	if (unlikely(!fp))
	183	return 0;
	184	lhash = SK_RUN_FILTER(fp, skb);
	185	c = (char *) &lhash;
	186	return c[0] ^ c[1] ^ c[2] ^ c[3];
	187	}
	188
ab8250d7 JP	189	static void lb_update_tx_stats(unsigned int tx_bytes, struct lb_priv *lb_priv,
	190	struct lb_port_priv *lb_port_priv,
	191	unsigned char hash)
	192	{
	193	struct lb_pcpu_stats *pcpu_stats;
	194	struct lb_stats *port_stats;
	195	struct lb_stats *hash_stats;
	196
	197	pcpu_stats = this_cpu_ptr(lb_priv->pcpu_stats);
	198	port_stats = this_cpu_ptr(lb_port_priv->pcpu_stats);
	199	hash_stats = &pcpu_stats->hash_stats[hash];
	200	u64_stats_update_begin(&pcpu_stats->syncp);
	201	port_stats->tx_bytes += tx_bytes;
	202	hash_stats->tx_bytes += tx_bytes;
	203	u64_stats_update_end(&pcpu_stats->syncp);
	204	}
	205
596e2024 JP	206	static bool lb_transmit(struct team team, struct sk_buff skb)
596e2024 JP	207	{
ab8250d7 JP	208	struct lb_priv *lb_priv = get_lb_priv(team);
ab8250d7 JP	209	lb_select_tx_port_func_t *select_tx_port_func;
01d7f30a	210	struct team_port *port;
ab8250d7 JP	211	unsigned char hash;
ab8250d7 JP	212	unsigned int tx_bytes = skb->len;
01d7f30a	213
ab8250d7	214	hash = lb_get_skb_hash(lb_priv, skb);
d1904fbd	215	select_tx_port_func = rcu_dereference_bh(lb_priv->select_tx_port_func);
ab8250d7	216	port = select_tx_port_func(team, lb_priv, skb, hash);
01d7f30a JP	217	if (unlikely(!port))
01d7f30a JP	218	goto drop;
bd2d0837	219	if (team_dev_queue_xmit(team, port, skb))
01d7f30a	220	return false;
ab8250d7	221	lb_update_tx_stats(tx_bytes, lb_priv, get_lb_port_priv(port), hash);
01d7f30a JP	222	return true;
	223
	224	drop:
	225	dev_kfree_skb_any(skb);
	226	return false;
	227	}
	228
80f7c668	229	static int lb_bpf_func_get(struct team team, struct team_gsetter_ctx ctx)
01d7f30a	230	{
ab8250d7 JP	231	struct lb_priv *lb_priv = get_lb_priv(team);
	232
	233	if (!lb_priv->ex->orig_fprog) {
80f7c668 JP	234	ctx->data.bin_val.len = 0;
80f7c668 JP	235	ctx->data.bin_val.ptr = NULL;
01d7f30a	236	return 0;
80f7c668	237	}
ab8250d7	238	ctx->data.bin_val.len = lb_priv->ex->orig_fprog->len *
80f7c668	239	sizeof(struct sock_filter);
ab8250d7	240	ctx->data.bin_val.ptr = lb_priv->ex->orig_fprog->filter;
01d7f30a JP	241	return 0;
	242	}
	243
b1fcd35c	244	static int __fprog_create(struct sock_fprog_kern **pfprog, u32 data_len,
80f7c668	245	const void *data)
01d7f30a	246	{
b1fcd35c	247	struct sock_fprog_kern *fprog;
01d7f30a JP	248	struct sock_filter filter = (struct sock_filter ) data;
	249
	250	if (data_len % sizeof(struct sock_filter))
	251	return -EINVAL;
ea5930f4	252	fprog = kmalloc(sizeof(*fprog), GFP_KERNEL);
01d7f30a JP	253	if (!fprog)
	254	return -ENOMEM;
	255	fprog->filter = kmemdup(filter, data_len, GFP_KERNEL);
	256	if (!fprog->filter) {
	257	kfree(fprog);
	258	return -ENOMEM;
	259	}
	260	fprog->len = data_len / sizeof(struct sock_filter);
	261	*pfprog = fprog;
	262	return 0;
	263	}
	264
b1fcd35c	265	static void __fprog_destroy(struct sock_fprog_kern *fprog)
01d7f30a JP	266	{
	267	kfree(fprog->filter);
	268	kfree(fprog);
	269	}
	270
80f7c668	271	static int lb_bpf_func_set(struct team team, struct team_gsetter_ctx ctx)
01d7f30a	272	{
ab8250d7	273	struct lb_priv *lb_priv = get_lb_priv(team);
01d7f30a	274	struct sk_filter *fp = NULL;
6dab015c	275	struct sk_filter *orig_fp;
b1fcd35c	276	struct sock_fprog_kern *fprog = NULL;
01d7f30a JP	277	int err;
01d7f30a JP	278
80f7c668 JP	279	if (ctx->data.bin_val.len) {
	280	err = __fprog_create(&fprog, ctx->data.bin_val.len,
	281	ctx->data.bin_val.ptr);
01d7f30a JP	282	if (err)
	283	return err;
	284	err = sk_unattached_filter_create(&fp, fprog);
	285	if (err) {
	286	__fprog_destroy(fprog);
	287	return err;
	288	}
	289	}
	290
ab8250d7	291	if (lb_priv->ex->orig_fprog) {
01d7f30a	292	/* Clear old filter data */
ab8250d7	293	__fprog_destroy(lb_priv->ex->orig_fprog);
6dab015c JP	294	orig_fp = rcu_dereference_protected(lb_priv->fp,
	295	lockdep_is_held(&team->lock));
	296	sk_unattached_filter_destroy(orig_fp);
01d7f30a JP	297	}
01d7f30a JP	298
ab8250d7 JP	299	rcu_assign_pointer(lb_priv->fp, fp);
	300	lb_priv->ex->orig_fprog = fprog;
	301	return 0;
	302	}
	303
	304	static int lb_tx_method_get(struct team team, struct team_gsetter_ctx ctx)
	305	{
	306	struct lb_priv *lb_priv = get_lb_priv(team);
6dab015c	307	lb_select_tx_port_func_t *func;
ab8250d7 JP	308	char *name;
ab8250d7 JP	309
6dab015c JP	310	func = rcu_dereference_protected(lb_priv->select_tx_port_func,
	311	lockdep_is_held(&team->lock));
	312	name = lb_select_tx_port_get_name(func);
ab8250d7 JP	313	BUG_ON(!name);
	314	ctx->data.str_val = name;
	315	return 0;
	316	}
	317
	318	static int lb_tx_method_set(struct team team, struct team_gsetter_ctx ctx)
	319	{
	320	struct lb_priv *lb_priv = get_lb_priv(team);
	321	lb_select_tx_port_func_t *func;
	322
	323	func = lb_select_tx_port_get_func(ctx->data.str_val);
	324	if (!func)
	325	return -EINVAL;
	326	rcu_assign_pointer(lb_priv->select_tx_port_func, func);
	327	return 0;
	328	}
	329
	330	static int lb_tx_hash_to_port_mapping_init(struct team *team,
	331	struct team_option_inst_info *info)
	332	{
	333	struct lb_priv *lb_priv = get_lb_priv(team);
	334	unsigned char hash = info->array_index;
	335
	336	LB_HTPM_OPT_INST_INFO_BY_HASH(lb_priv, hash) = info;
	337	return 0;
	338	}
	339
	340	static int lb_tx_hash_to_port_mapping_get(struct team *team,
	341	struct team_gsetter_ctx *ctx)
	342	{
	343	struct lb_priv *lb_priv = get_lb_priv(team);
	344	struct team_port *port;
	345	unsigned char hash = ctx->info->array_index;
	346
	347	port = LB_HTPM_PORT_BY_HASH(lb_priv, hash);
	348	ctx->data.u32_val = port ? port->dev->ifindex : 0;
	349	return 0;
	350	}
	351
	352	static int lb_tx_hash_to_port_mapping_set(struct team *team,
	353	struct team_gsetter_ctx *ctx)
	354	{
	355	struct lb_priv *lb_priv = get_lb_priv(team);
	356	struct team_port *port;
	357	unsigned char hash = ctx->info->array_index;
	358
	359	list_for_each_entry(port, &team->port_list, list) {
52a4fd77 JP	360	if (ctx->data.u32_val == port->dev->ifindex &&
52a4fd77 JP	361	team_port_enabled(port)) {
ab8250d7 JP	362	rcu_assign_pointer(LB_HTPM_PORT_BY_HASH(lb_priv, hash),
	363	port);
	364	return 0;
	365	}
	366	}
	367	return -ENODEV;
	368	}
	369
	370	static int lb_hash_stats_init(struct team *team,
	371	struct team_option_inst_info *info)
	372	{
	373	struct lb_priv *lb_priv = get_lb_priv(team);
	374	unsigned char hash = info->array_index;
	375
	376	lb_priv->ex->stats.info[hash].opt_inst_info = info;
	377	return 0;
	378	}
	379
	380	static int lb_hash_stats_get(struct team team, struct team_gsetter_ctx ctx)
	381	{
	382	struct lb_priv *lb_priv = get_lb_priv(team);
	383	unsigned char hash = ctx->info->array_index;
	384
	385	ctx->data.bin_val.ptr = &lb_priv->ex->stats.info[hash].stats;
	386	ctx->data.bin_val.len = sizeof(struct lb_stats);
	387	return 0;
	388	}
	389
	390	static int lb_port_stats_init(struct team *team,
	391	struct team_option_inst_info *info)
	392	{
	393	struct team_port *port = info->port;
	394	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
	395
	396	lb_port_priv->stats_info.opt_inst_info = info;
	397	return 0;
	398	}
	399
	400	static int lb_port_stats_get(struct team team, struct team_gsetter_ctx ctx)
	401	{
	402	struct team_port *port = ctx->info->port;
	403	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
	404
	405	ctx->data.bin_val.ptr = &lb_port_priv->stats_info.stats;
	406	ctx->data.bin_val.len = sizeof(struct lb_stats);
	407	return 0;
	408	}
	409
	410	static void __lb_stats_info_refresh_prepare(struct lb_stats_info *s_info)
	411	{
	412	memcpy(&s_info->last_stats, &s_info->stats, sizeof(struct lb_stats));
	413	memset(&s_info->stats, 0, sizeof(struct lb_stats));
	414	}
	415
	416	static bool __lb_stats_info_refresh_check(struct lb_stats_info *s_info,
	417	struct team *team)
	418	{
	419	if (memcmp(&s_info->last_stats, &s_info->stats,
	420	sizeof(struct lb_stats))) {
	421	team_option_inst_set_change(s_info->opt_inst_info);
	422	return true;
	423	}
	424	return false;
	425	}
426
427	static void __lb_one_cpu_stats_add(struct lb_stats *acc_stats,
428	struct lb_stats *cpu_stats,
429	struct u64_stats_sync *syncp)
430	{
431	unsigned int start;
432	struct lb_stats tmp;
433
434	do {
57a7744e	435	start = u64_stats_fetch_begin_irq(syncp);
ab8250d7	436	tmp.tx_bytes = cpu_stats->tx_bytes;
57a7744e	437	} while (u64_stats_fetch_retry_irq(syncp, start));
ab8250d7 JP	438	acc_stats->tx_bytes += tmp.tx_bytes;
	439	}
	440
	441	static void lb_stats_refresh(struct work_struct *work)
	442	{
	443	struct team *team;
	444	struct lb_priv *lb_priv;
	445	struct lb_priv_ex *lb_priv_ex;
	446	struct lb_pcpu_stats *pcpu_stats;
	447	struct lb_stats *stats;
	448	struct lb_stats_info *s_info;
	449	struct team_port *port;
	450	bool changed = false;
	451	int i;
	452	int j;
	453
	454	lb_priv_ex = container_of(work, struct lb_priv_ex,
	455	stats.refresh_dw.work);
	456
	457	team = lb_priv_ex->team;
	458	lb_priv = get_lb_priv(team);
	459
	460	if (!mutex_trylock(&team->lock)) {
	461	schedule_delayed_work(&lb_priv_ex->stats.refresh_dw, 0);
	462	return;
	463	}
	464
	465	for (j = 0; j < LB_TX_HASHTABLE_SIZE; j++) {
	466	s_info = &lb_priv->ex->stats.info[j];
	467	__lb_stats_info_refresh_prepare(s_info);
	468	for_each_possible_cpu(i) {
	469	pcpu_stats = per_cpu_ptr(lb_priv->pcpu_stats, i);
	470	stats = &pcpu_stats->hash_stats[j];
	471	__lb_one_cpu_stats_add(&s_info->stats, stats,
	472	&pcpu_stats->syncp);
	473	}
	474	changed \|= __lb_stats_info_refresh_check(s_info, team);
	475	}
	476
	477	list_for_each_entry(port, &team->port_list, list) {
	478	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
	479
	480	s_info = &lb_port_priv->stats_info;
	481	__lb_stats_info_refresh_prepare(s_info);
	482	for_each_possible_cpu(i) {
	483	pcpu_stats = per_cpu_ptr(lb_priv->pcpu_stats, i);
	484	stats = per_cpu_ptr(lb_port_priv->pcpu_stats, i);
	485	__lb_one_cpu_stats_add(&s_info->stats, stats,
	486	&pcpu_stats->syncp);
	487	}
	488	changed \|= __lb_stats_info_refresh_check(s_info, team);
	489	}
	490
	491	if (changed)
	492	team_options_change_check(team);
	493
	494	schedule_delayed_work(&lb_priv_ex->stats.refresh_dw,
	495	(lb_priv_ex->stats.refresh_interval * HZ) / 10);
	496
	497	mutex_unlock(&team->lock);
	498	}
	499
	500	static int lb_stats_refresh_interval_get(struct team *team,
	501	struct team_gsetter_ctx *ctx)
502	{
503	struct lb_priv *lb_priv = get_lb_priv(team);
504
505	ctx->data.u32_val = lb_priv->ex->stats.refresh_interval;
506	return 0;
507	}
508
509	static int lb_stats_refresh_interval_set(struct team *team,
510	struct team_gsetter_ctx *ctx)
511	{
512	struct lb_priv *lb_priv = get_lb_priv(team);
513	unsigned int interval;
514
515	interval = ctx->data.u32_val;
516	if (lb_priv->ex->stats.refresh_interval == interval)
517	return 0;
518	lb_priv->ex->stats.refresh_interval = interval;
519	if (interval)
520	schedule_delayed_work(&lb_priv->ex->stats.refresh_dw, 0);
521	else
522	cancel_delayed_work(&lb_priv->ex->stats.refresh_dw);
01d7f30a JP	523	return 0;
	524	}
	525
	526	static const struct team_option lb_options[] = {
	527	{
	528	.name = "bpf_hash_func",
	529	.type = TEAM_OPTION_TYPE_BINARY,
	530	.getter = lb_bpf_func_get,
	531	.setter = lb_bpf_func_set,
	532	},
ab8250d7 JP	533	{
	534	.name = "lb_tx_method",
	535	.type = TEAM_OPTION_TYPE_STRING,
	536	.getter = lb_tx_method_get,
	537	.setter = lb_tx_method_set,
	538	},
	539	{
	540	.name = "lb_tx_hash_to_port_mapping",
	541	.array_size = LB_TX_HASHTABLE_SIZE,
	542	.type = TEAM_OPTION_TYPE_U32,
	543	.init = lb_tx_hash_to_port_mapping_init,
	544	.getter = lb_tx_hash_to_port_mapping_get,
	545	.setter = lb_tx_hash_to_port_mapping_set,
	546	},
	547	{
	548	.name = "lb_hash_stats",
	549	.array_size = LB_TX_HASHTABLE_SIZE,
	550	.type = TEAM_OPTION_TYPE_BINARY,
	551	.init = lb_hash_stats_init,
	552	.getter = lb_hash_stats_get,
	553	},
	554	{
	555	.name = "lb_port_stats",
	556	.per_port = true,
	557	.type = TEAM_OPTION_TYPE_BINARY,
	558	.init = lb_port_stats_init,
	559	.getter = lb_port_stats_get,
	560	},
	561	{
	562	.name = "lb_stats_refresh_interval",
	563	.type = TEAM_OPTION_TYPE_U32,
	564	.getter = lb_stats_refresh_interval_get,
	565	.setter = lb_stats_refresh_interval_set,
	566	},
01d7f30a JP	567	};
01d7f30a JP	568
cade4555	569	static int lb_init(struct team *team)
01d7f30a	570	{
ab8250d7 JP	571	struct lb_priv *lb_priv = get_lb_priv(team);
ab8250d7 JP	572	lb_select_tx_port_func_t *func;
827da44c	573	int i, err;
ab8250d7 JP	574
	575	/* set default tx port selector */
	576	func = lb_select_tx_port_get_func("hash");
	577	BUG_ON(!func);
	578	rcu_assign_pointer(lb_priv->select_tx_port_func, func);
	579
	580	lb_priv->ex = kzalloc(sizeof(*lb_priv->ex), GFP_KERNEL);
	581	if (!lb_priv->ex)
	582	return -ENOMEM;
	583	lb_priv->ex->team = team;
	584
	585	lb_priv->pcpu_stats = alloc_percpu(struct lb_pcpu_stats);
	586	if (!lb_priv->pcpu_stats) {
	587	err = -ENOMEM;
	588	goto err_alloc_pcpu_stats;
	589	}
	590
827da44c JS	591	for_each_possible_cpu(i) {
	592	struct lb_pcpu_stats *team_lb_stats;
	593	team_lb_stats = per_cpu_ptr(lb_priv->pcpu_stats, i);
	594	u64_stats_init(&team_lb_stats->syncp);
	595	}
	596
	597
ab8250d7 JP	598	INIT_DELAYED_WORK(&lb_priv->ex->stats.refresh_dw, lb_stats_refresh);
	599
	600	err = team_options_register(team, lb_options, ARRAY_SIZE(lb_options));
	601	if (err)
	602	goto err_options_register;
	603	return 0;
	604
	605	err_options_register:
	606	free_percpu(lb_priv->pcpu_stats);
	607	err_alloc_pcpu_stats:
	608	kfree(lb_priv->ex);
	609	return err;
01d7f30a JP	610	}
01d7f30a JP	611
cade4555	612	static void lb_exit(struct team *team)
01d7f30a	613	{
ab8250d7 JP	614	struct lb_priv *lb_priv = get_lb_priv(team);
ab8250d7 JP	615
01d7f30a JP	616	team_options_unregister(team, lb_options,
01d7f30a JP	617	ARRAY_SIZE(lb_options));
ab8250d7 JP	618	cancel_delayed_work_sync(&lb_priv->ex->stats.refresh_dw);
	619	free_percpu(lb_priv->pcpu_stats);
	620	kfree(lb_priv->ex);
	621	}
	622
	623	static int lb_port_enter(struct team team, struct team_port port)
	624	{
	625	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
	626
	627	lb_port_priv->pcpu_stats = alloc_percpu(struct lb_stats);
	628	if (!lb_port_priv->pcpu_stats)
	629	return -ENOMEM;
	630	return 0;
	631	}
	632
	633	static void lb_port_leave(struct team team, struct team_port port)
	634	{
	635	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
	636
	637	free_percpu(lb_port_priv->pcpu_stats);
	638	}
	639
	640	static void lb_port_disabled(struct team team, struct team_port port)
	641	{
	642	lb_tx_hash_to_port_mapping_null_port(team, port);
01d7f30a JP	643	}
01d7f30a JP	644
01d7f30a JP	645	static const struct team_mode_ops lb_mode_ops = {
	646	.init = lb_init,
	647	.exit = lb_exit,
ab8250d7 JP	648	.port_enter = lb_port_enter,
	649	.port_leave = lb_port_leave,
	650	.port_disabled = lb_port_disabled,
01d7f30a	651	.transmit = lb_transmit,
01d7f30a JP	652	};
01d7f30a JP	653
0402788a	654	static const struct team_mode lb_mode = {
01d7f30a JP	655	.kind = "loadbalance",
	656	.owner = THIS_MODULE,
	657	.priv_size = sizeof(struct lb_priv),
ab8250d7	658	.port_priv_size = sizeof(struct lb_port_priv),
01d7f30a JP	659	.ops = &lb_mode_ops,
	660	};
	661
	662	static int __init lb_init_module(void)
	663	{
	664	return team_mode_register(&lb_mode);
	665	}
	666
	667	static void __exit lb_cleanup_module(void)
	668	{
	669	team_mode_unregister(&lb_mode);
	670	}
	671
	672	module_init(lb_init_module);
	673	module_exit(lb_cleanup_module);
	674
	675	MODULE_LICENSE("GPL v2");
	676	MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
	677	MODULE_DESCRIPTION("Load-balancing mode for team");
	678	MODULE_ALIAS("team-mode-loadbalance");