[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 bpf_prog __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 bpf_prog *fp;
	uint32_t lhash;
	unsigned char *c;

	fp = rcu_dereference_bh(lb_priv->fp);
	if (unlikely(!fp))
		return 0;
	lhash = BPF_PROG_RUN(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 bpf_prog *fp = NULL;
	struct bpf_prog *orig_fp = NULL;
	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 = bpf_prog_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));
	}

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

	if (orig_fp) {
		synchronize_rcu();
		bpf_prog_destroy(orig_fp);
	}
	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	60	struct lb_priv {
7ae457c1	61	struct bpf_prog __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	176	{
7ae457c1	177	struct bpf_prog *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))
596e2024 JP	183	return 0;
7ae457c1	184	lhash = BPF_PROG_RUN(fp, skb);
596e2024 JP	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);
7ae457c1 AS	274	struct bpf_prog *fp = NULL;
7ae457c1 AS	275	struct bpf_prog *orig_fp = NULL;
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)
01d7f30a JP	283	return err;
7ae457c1	284	err = bpf_prog_create(&fp, fprog);
01d7f30a JP	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,
6dab015c JP	295	lockdep_is_held(&team->lock));
01d7f30a JP	296	}
01d7f30a JP	297
ab8250d7 JP	298	rcu_assign_pointer(lb_priv->fp, fp);
ab8250d7 JP	299	lb_priv->ex->orig_fprog = fprog;
34c5bd66 PN	300
	301	if (orig_fp) {
	302	synchronize_rcu();
7ae457c1	303	bpf_prog_destroy(orig_fp);
34c5bd66	304	}
ab8250d7 JP	305	return 0;
	306	}
	307
	308	static int lb_tx_method_get(struct team team, struct team_gsetter_ctx ctx)
	309	{
	310	struct lb_priv *lb_priv = get_lb_priv(team);
6dab015c	311	lb_select_tx_port_func_t *func;
ab8250d7 JP	312	char *name;
ab8250d7 JP	313
6dab015c JP	314	func = rcu_dereference_protected(lb_priv->select_tx_port_func,
	315	lockdep_is_held(&team->lock));
	316	name = lb_select_tx_port_get_name(func);
ab8250d7 JP	317	BUG_ON(!name);
	318	ctx->data.str_val = name;
	319	return 0;
	320	}
	321
	322	static int lb_tx_method_set(struct team team, struct team_gsetter_ctx ctx)
	323	{
	324	struct lb_priv *lb_priv = get_lb_priv(team);
	325	lb_select_tx_port_func_t *func;
	326
	327	func = lb_select_tx_port_get_func(ctx->data.str_val);
	328	if (!func)
	329	return -EINVAL;
	330	rcu_assign_pointer(lb_priv->select_tx_port_func, func);
	331	return 0;
	332	}
	333
	334	static int lb_tx_hash_to_port_mapping_init(struct team *team,
	335	struct team_option_inst_info *info)
	336	{
	337	struct lb_priv *lb_priv = get_lb_priv(team);
	338	unsigned char hash = info->array_index;
	339
	340	LB_HTPM_OPT_INST_INFO_BY_HASH(lb_priv, hash) = info;
	341	return 0;
	342	}
	343
	344	static int lb_tx_hash_to_port_mapping_get(struct team *team,
	345	struct team_gsetter_ctx *ctx)
	346	{
	347	struct lb_priv *lb_priv = get_lb_priv(team);
	348	struct team_port *port;
	349	unsigned char hash = ctx->info->array_index;
	350
	351	port = LB_HTPM_PORT_BY_HASH(lb_priv, hash);
	352	ctx->data.u32_val = port ? port->dev->ifindex : 0;
	353	return 0;
	354	}
	355
	356	static int lb_tx_hash_to_port_mapping_set(struct team *team,
	357	struct team_gsetter_ctx *ctx)
	358	{
	359	struct lb_priv *lb_priv = get_lb_priv(team);
	360	struct team_port *port;
	361	unsigned char hash = ctx->info->array_index;
	362
	363	list_for_each_entry(port, &team->port_list, list) {
52a4fd77 JP	364	if (ctx->data.u32_val == port->dev->ifindex &&
52a4fd77 JP	365	team_port_enabled(port)) {
ab8250d7 JP	366	rcu_assign_pointer(LB_HTPM_PORT_BY_HASH(lb_priv, hash),
	367	port);
	368	return 0;
	369	}
	370	}
	371	return -ENODEV;
	372	}
	373
	374	static int lb_hash_stats_init(struct team *team,
	375	struct team_option_inst_info *info)
	376	{
	377	struct lb_priv *lb_priv = get_lb_priv(team);
	378	unsigned char hash = info->array_index;
	379
	380	lb_priv->ex->stats.info[hash].opt_inst_info = info;
	381	return 0;
	382	}
	383
	384	static int lb_hash_stats_get(struct team team, struct team_gsetter_ctx ctx)
	385	{
	386	struct lb_priv *lb_priv = get_lb_priv(team);
	387	unsigned char hash = ctx->info->array_index;
	388
	389	ctx->data.bin_val.ptr = &lb_priv->ex->stats.info[hash].stats;
	390	ctx->data.bin_val.len = sizeof(struct lb_stats);
	391	return 0;
	392	}
	393
	394	static int lb_port_stats_init(struct team *team,
	395	struct team_option_inst_info *info)
	396	{
	397	struct team_port *port = info->port;
	398	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
	399
	400	lb_port_priv->stats_info.opt_inst_info = info;
	401	return 0;
	402	}
	403
	404	static int lb_port_stats_get(struct team team, struct team_gsetter_ctx ctx)
	405	{
	406	struct team_port *port = ctx->info->port;
	407	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
	408
	409	ctx->data.bin_val.ptr = &lb_port_priv->stats_info.stats;
	410	ctx->data.bin_val.len = sizeof(struct lb_stats);
	411	return 0;
	412	}
	413
	414	static void __lb_stats_info_refresh_prepare(struct lb_stats_info *s_info)
	415	{
	416	memcpy(&s_info->last_stats, &s_info->stats, sizeof(struct lb_stats));
	417	memset(&s_info->stats, 0, sizeof(struct lb_stats));
	418	}
	419
	420	static bool __lb_stats_info_refresh_check(struct lb_stats_info *s_info,
	421	struct team *team)
	422	{
	423	if (memcmp(&s_info->last_stats, &s_info->stats,
	424	sizeof(struct lb_stats))) {
	425	team_option_inst_set_change(s_info->opt_inst_info);
	426	return true;
	427	}
	428	return false;
	429	}
430
431	static void __lb_one_cpu_stats_add(struct lb_stats *acc_stats,
432	struct lb_stats *cpu_stats,
433	struct u64_stats_sync *syncp)
434	{
435	unsigned int start;
436	struct lb_stats tmp;
437
438	do {
57a7744e	439	start = u64_stats_fetch_begin_irq(syncp);
ab8250d7	440	tmp.tx_bytes = cpu_stats->tx_bytes;
57a7744e	441	} while (u64_stats_fetch_retry_irq(syncp, start));
ab8250d7 JP	442	acc_stats->tx_bytes += tmp.tx_bytes;
	443	}
	444
	445	static void lb_stats_refresh(struct work_struct *work)
	446	{
	447	struct team *team;
	448	struct lb_priv *lb_priv;
	449	struct lb_priv_ex *lb_priv_ex;
	450	struct lb_pcpu_stats *pcpu_stats;
	451	struct lb_stats *stats;
	452	struct lb_stats_info *s_info;
	453	struct team_port *port;
	454	bool changed = false;
	455	int i;
	456	int j;
	457
	458	lb_priv_ex = container_of(work, struct lb_priv_ex,
	459	stats.refresh_dw.work);
	460
	461	team = lb_priv_ex->team;
	462	lb_priv = get_lb_priv(team);
	463
	464	if (!mutex_trylock(&team->lock)) {
	465	schedule_delayed_work(&lb_priv_ex->stats.refresh_dw, 0);
	466	return;
	467	}
	468
	469	for (j = 0; j < LB_TX_HASHTABLE_SIZE; j++) {
	470	s_info = &lb_priv->ex->stats.info[j];
	471	__lb_stats_info_refresh_prepare(s_info);
	472	for_each_possible_cpu(i) {
	473	pcpu_stats = per_cpu_ptr(lb_priv->pcpu_stats, i);
	474	stats = &pcpu_stats->hash_stats[j];
	475	__lb_one_cpu_stats_add(&s_info->stats, stats,
	476	&pcpu_stats->syncp);
	477	}
	478	changed \|= __lb_stats_info_refresh_check(s_info, team);
	479	}
	480
	481	list_for_each_entry(port, &team->port_list, list) {
	482	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
	483
	484	s_info = &lb_port_priv->stats_info;
	485	__lb_stats_info_refresh_prepare(s_info);
	486	for_each_possible_cpu(i) {
	487	pcpu_stats = per_cpu_ptr(lb_priv->pcpu_stats, i);
	488	stats = per_cpu_ptr(lb_port_priv->pcpu_stats, i);
	489	__lb_one_cpu_stats_add(&s_info->stats, stats,
	490	&pcpu_stats->syncp);
	491	}
	492	changed \|= __lb_stats_info_refresh_check(s_info, team);
	493	}
	494
	495	if (changed)
	496	team_options_change_check(team);
	497
	498	schedule_delayed_work(&lb_priv_ex->stats.refresh_dw,
	499	(lb_priv_ex->stats.refresh_interval * HZ) / 10);
	500
	501	mutex_unlock(&team->lock);
	502	}
	503
	504	static int lb_stats_refresh_interval_get(struct team *team,
	505	struct team_gsetter_ctx *ctx)
506	{
507	struct lb_priv *lb_priv = get_lb_priv(team);
508
509	ctx->data.u32_val = lb_priv->ex->stats.refresh_interval;
510	return 0;
511	}
512
513	static int lb_stats_refresh_interval_set(struct team *team,
514	struct team_gsetter_ctx *ctx)
515	{
516	struct lb_priv *lb_priv = get_lb_priv(team);
517	unsigned int interval;
518
519	interval = ctx->data.u32_val;
520	if (lb_priv->ex->stats.refresh_interval == interval)
521	return 0;
522	lb_priv->ex->stats.refresh_interval = interval;
523	if (interval)
524	schedule_delayed_work(&lb_priv->ex->stats.refresh_dw, 0);
525	else
526	cancel_delayed_work(&lb_priv->ex->stats.refresh_dw);
01d7f30a JP	527	return 0;
	528	}
	529
	530	static const struct team_option lb_options[] = {
	531	{
	532	.name = "bpf_hash_func",
	533	.type = TEAM_OPTION_TYPE_BINARY,
	534	.getter = lb_bpf_func_get,
	535	.setter = lb_bpf_func_set,
	536	},
ab8250d7 JP	537	{
	538	.name = "lb_tx_method",
	539	.type = TEAM_OPTION_TYPE_STRING,
	540	.getter = lb_tx_method_get,
	541	.setter = lb_tx_method_set,
	542	},
	543	{
	544	.name = "lb_tx_hash_to_port_mapping",
	545	.array_size = LB_TX_HASHTABLE_SIZE,
	546	.type = TEAM_OPTION_TYPE_U32,
	547	.init = lb_tx_hash_to_port_mapping_init,
	548	.getter = lb_tx_hash_to_port_mapping_get,
	549	.setter = lb_tx_hash_to_port_mapping_set,
	550	},
	551	{
	552	.name = "lb_hash_stats",
	553	.array_size = LB_TX_HASHTABLE_SIZE,
	554	.type = TEAM_OPTION_TYPE_BINARY,
	555	.init = lb_hash_stats_init,
	556	.getter = lb_hash_stats_get,
	557	},
	558	{
	559	.name = "lb_port_stats",
	560	.per_port = true,
	561	.type = TEAM_OPTION_TYPE_BINARY,
	562	.init = lb_port_stats_init,
	563	.getter = lb_port_stats_get,
	564	},
	565	{
	566	.name = "lb_stats_refresh_interval",
	567	.type = TEAM_OPTION_TYPE_U32,
	568	.getter = lb_stats_refresh_interval_get,
	569	.setter = lb_stats_refresh_interval_set,
	570	},
01d7f30a JP	571	};
01d7f30a JP	572
cade4555	573	static int lb_init(struct team *team)
01d7f30a	574	{
ab8250d7 JP	575	struct lb_priv *lb_priv = get_lb_priv(team);
ab8250d7 JP	576	lb_select_tx_port_func_t *func;
827da44c	577	int i, err;
ab8250d7 JP	578
	579	/* set default tx port selector */
	580	func = lb_select_tx_port_get_func("hash");
	581	BUG_ON(!func);
	582	rcu_assign_pointer(lb_priv->select_tx_port_func, func);
	583
	584	lb_priv->ex = kzalloc(sizeof(*lb_priv->ex), GFP_KERNEL);
	585	if (!lb_priv->ex)
	586	return -ENOMEM;
	587	lb_priv->ex->team = team;
	588
	589	lb_priv->pcpu_stats = alloc_percpu(struct lb_pcpu_stats);
	590	if (!lb_priv->pcpu_stats) {
	591	err = -ENOMEM;
	592	goto err_alloc_pcpu_stats;
	593	}
	594
827da44c JS	595	for_each_possible_cpu(i) {
	596	struct lb_pcpu_stats *team_lb_stats;
	597	team_lb_stats = per_cpu_ptr(lb_priv->pcpu_stats, i);
	598	u64_stats_init(&team_lb_stats->syncp);
	599	}
	600
	601
ab8250d7 JP	602	INIT_DELAYED_WORK(&lb_priv->ex->stats.refresh_dw, lb_stats_refresh);
	603
	604	err = team_options_register(team, lb_options, ARRAY_SIZE(lb_options));
	605	if (err)
	606	goto err_options_register;
	607	return 0;
	608
	609	err_options_register:
	610	free_percpu(lb_priv->pcpu_stats);
	611	err_alloc_pcpu_stats:
	612	kfree(lb_priv->ex);
	613	return err;
01d7f30a JP	614	}
01d7f30a JP	615
cade4555	616	static void lb_exit(struct team *team)
01d7f30a	617	{
ab8250d7 JP	618	struct lb_priv *lb_priv = get_lb_priv(team);
ab8250d7 JP	619
01d7f30a JP	620	team_options_unregister(team, lb_options,
01d7f30a JP	621	ARRAY_SIZE(lb_options));
ab8250d7 JP	622	cancel_delayed_work_sync(&lb_priv->ex->stats.refresh_dw);
	623	free_percpu(lb_priv->pcpu_stats);
	624	kfree(lb_priv->ex);
	625	}
	626
	627	static int lb_port_enter(struct team team, struct team_port port)
	628	{
	629	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
	630
	631	lb_port_priv->pcpu_stats = alloc_percpu(struct lb_stats);
	632	if (!lb_port_priv->pcpu_stats)
	633	return -ENOMEM;
	634	return 0;
	635	}
	636
	637	static void lb_port_leave(struct team team, struct team_port port)
	638	{
	639	struct lb_port_priv *lb_port_priv = get_lb_port_priv(port);
	640
	641	free_percpu(lb_port_priv->pcpu_stats);
	642	}
	643
	644	static void lb_port_disabled(struct team team, struct team_port port)
	645	{
	646	lb_tx_hash_to_port_mapping_null_port(team, port);
01d7f30a JP	647	}
01d7f30a JP	648
01d7f30a JP	649	static const struct team_mode_ops lb_mode_ops = {
	650	.init = lb_init,
	651	.exit = lb_exit,
ab8250d7 JP	652	.port_enter = lb_port_enter,
	653	.port_leave = lb_port_leave,
	654	.port_disabled = lb_port_disabled,
01d7f30a	655	.transmit = lb_transmit,
01d7f30a JP	656	};
01d7f30a JP	657
0402788a	658	static const struct team_mode lb_mode = {
01d7f30a JP	659	.kind = "loadbalance",
	660	.owner = THIS_MODULE,
	661	.priv_size = sizeof(struct lb_priv),
ab8250d7	662	.port_priv_size = sizeof(struct lb_port_priv),
01d7f30a JP	663	.ops = &lb_mode_ops,
	664	};
	665
	666	static int __init lb_init_module(void)
	667	{
	668	return team_mode_register(&lb_mode);
	669	}
	670
	671	static void __exit lb_cleanup_module(void)
	672	{
	673	team_mode_unregister(&lb_mode);
	674	}
	675
	676	module_init(lb_init_module);
	677	module_exit(lb_cleanup_module);
	678
	679	MODULE_LICENSE("GPL v2");
	680	MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
	681	MODULE_DESCRIPTION("Load-balancing mode for team");
	682	MODULE_ALIAS("team-mode-loadbalance");