[deliverable/linux.git] / drivers / net / bonding / bonding.h

/*
 * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
 *
 * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
 * NCM: Network and Communications Management, Inc.
 *
 * BUT, I'm the one who modified it for ethernet, so:
 * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
 *
 *	This software may be used and distributed according to the terms
 *	of the GNU Public License, incorporated herein by reference.
 *
 */

#ifndef _LINUX_BONDING_H
#define _LINUX_BONDING_H

#include <linux/timer.h>
#include <linux/proc_fs.h>
#include <linux/if_bonding.h>
#include <linux/cpumask.h>
#include <linux/in6.h>
#include <linux/netpoll.h>
#include <linux/inetdevice.h>
#include <linux/etherdevice.h>
#include "bond_3ad.h"
#include "bond_alb.h"

#define DRV_VERSION	"3.7.1"
#define DRV_RELDATE	"April 27, 2011"
#define DRV_NAME	"bonding"
#define DRV_DESCRIPTION	"Ethernet Channel Bonding Driver"

#define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"

#define BOND_MAX_ARP_TARGETS	16

#define BOND_DEFAULT_MIIMON	100

#define IS_UP(dev)					   \
	      ((((dev)->flags & IFF_UP) == IFF_UP)	&& \
	       netif_running(dev)			&& \
	       netif_carrier_ok(dev))

/*
 * Checks whether slave is ready for transmit.
 */
#define SLAVE_IS_OK(slave)			        \
		    (((slave)->dev->flags & IFF_UP)  && \
		     netif_running((slave)->dev)     && \
		     ((slave)->link == BOND_LINK_UP) && \
		     bond_is_active_slave(slave))


#define USES_PRIMARY(mode)				\
		(((mode) == BOND_MODE_ACTIVEBACKUP) ||	\
		 ((mode) == BOND_MODE_TLB)          ||	\
		 ((mode) == BOND_MODE_ALB))

#define BOND_NO_USES_ARP(mode)				\
		(((mode) == BOND_MODE_8023AD)	||	\
		 ((mode) == BOND_MODE_TLB)	||	\
		 ((mode) == BOND_MODE_ALB))

#define TX_QUEUE_OVERRIDE(mode)				\
			(((mode) == BOND_MODE_ACTIVEBACKUP) ||	\
			 ((mode) == BOND_MODE_ROUNDROBIN))

#define BOND_MODE_IS_LB(mode)			\
		(((mode) == BOND_MODE_TLB) ||	\
		 ((mode) == BOND_MODE_ALB))

#define IS_IP_TARGET_UNUSABLE_ADDRESS(a)	\
	((htonl(INADDR_BROADCAST) == a) ||	\
	 ipv4_is_zeronet(a))
/*
 * Less bad way to call ioctl from within the kernel; this needs to be
 * done some other way to get the call out of interrupt context.
 * Needs "ioctl" variable to be supplied by calling context.
 */
#define IOCTL(dev, arg, cmd) ({		\
	int res = 0;			\
	mm_segment_t fs = get_fs();	\
	set_fs(get_ds());		\
	res = ioctl(dev, arg, cmd);	\
	set_fs(fs);			\
	res; })

/* slave list primitives */
#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)

#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))

/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
#define bond_first_slave(bond) \
	(bond_has_slaves(bond) ? \
		netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
		NULL)
#define bond_last_slave(bond) \
	(bond_has_slaves(bond) ? \
		netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
		NULL)

#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))

/**
 * bond_for_each_slave - iterate over all slaves
 * @bond:	the bond holding this list
 * @pos:	current slave
 * @iter:	list_head * iterator
 *
 * Caller must hold bond->lock
 */
#define bond_for_each_slave(bond, pos, iter) \
	netdev_for_each_lower_private((bond)->dev, pos, iter)

/* Caller must have rcu_read_lock */
#define bond_for_each_slave_rcu(bond, pos, iter) \
	netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)

#ifdef CONFIG_NET_POLL_CONTROLLER
extern atomic_t netpoll_block_tx;

static inline void block_netpoll_tx(void)
{
	atomic_inc(&netpoll_block_tx);
}

static inline void unblock_netpoll_tx(void)
{
	atomic_dec(&netpoll_block_tx);
}

static inline int is_netpoll_tx_blocked(struct net_device *dev)
{
	if (unlikely(netpoll_tx_running(dev)))
		return atomic_read(&netpoll_block_tx);
	return 0;
}
#else
#define block_netpoll_tx()
#define unblock_netpoll_tx()
#define is_netpoll_tx_blocked(dev) (0)
#endif

struct bond_params {
	int mode;
	int xmit_policy;
	int miimon;
	u8 num_peer_notif;
	int arp_interval;
	int arp_validate;
	int arp_all_targets;
	int use_carrier;
	int fail_over_mac;
	int updelay;
	int downdelay;
	int lacp_fast;
	unsigned int min_links;
	int ad_select;
	char primary[IFNAMSIZ];
	int primary_reselect;
	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
	int tx_queues;
	int all_slaves_active;
	int resend_igmp;
	int lp_interval;
	int packets_per_slave;
};

struct bond_parm_tbl {
	char *modename;
	int mode;
};

#define BOND_MAX_MODENAME_LEN 20

struct slave {
	struct net_device *dev; /* first - useful for panic debug */
	struct bonding *bond; /* our master */
	int    delay;
	unsigned long jiffies;
	unsigned long last_arp_rx;
	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
	s8     link;    /* one of BOND_LINK_XXXX */
	s8     new_link;
	u8     backup:1,   /* indicates backup slave. Value corresponds with
			      BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
	       inactive:1; /* indicates inactive slave */
	u8     duplex;
	u32    original_mtu;
	u32    link_failure_count;
	u32    speed;
	u16    queue_id;
	u8     perm_hwaddr[ETH_ALEN];
	struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
	struct tlb_slave_info tlb_info;
#ifdef CONFIG_NET_POLL_CONTROLLER
	struct netpoll *np;
#endif
};

/*
 * Link pseudo-state only used internally by monitors
 */
#define BOND_LINK_NOCHANGE -1

/*
 * Here are the locking policies for the two bonding locks:
 *
 * 1) Get bond->lock when reading/writing slave list.
 * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
 *    (It is unnecessary when the write-lock is put with bond->lock.)
 * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
 *    beforehand.
 */
struct bonding {
	struct   net_device *dev; /* first - useful for panic debug */
	struct   slave *curr_active_slave;
	struct   slave *current_arp_slave;
	struct   slave *primary_slave;
	bool     force_primary;
	s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
	int     (*recv_probe)(const struct sk_buff *, struct bonding *,
			      struct slave *);
	rwlock_t lock;
	rwlock_t curr_slave_lock;
	u8	 send_peer_notif;
	u8       igmp_retrans;
#ifdef CONFIG_PROC_FS
	struct   proc_dir_entry *proc_entry;
	char     proc_file_name[IFNAMSIZ];
#endif /* CONFIG_PROC_FS */
	struct   list_head bond_list;
	u32      rr_tx_counter;
	struct   ad_bond_info ad_info;
	struct   alb_bond_info alb_info;
	struct   bond_params params;
	struct   workqueue_struct *wq;
	struct   delayed_work mii_work;
	struct   delayed_work arp_work;
	struct   delayed_work alb_work;
	struct   delayed_work ad_work;
	struct   delayed_work mcast_work;
#ifdef CONFIG_DEBUG_FS
	/* debugging support via debugfs */
	struct	 dentry *debug_dir;
#endif /* CONFIG_DEBUG_FS */
};

#define bond_slave_get_rcu(dev) \
	((struct slave *) rcu_dereference(dev->rx_handler_data))

#define bond_slave_get_rtnl(dev) \
	((struct slave *) rtnl_dereference(dev->rx_handler_data))

/**
 * Returns NULL if the net_device does not belong to any of the bond's slaves
 *
 * Caller must hold bond lock for read
 */
static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
						  struct net_device *slave_dev)
{
	return netdev_lower_dev_get_private(bond->dev, slave_dev);
}

static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
{
	if (!slave || !slave->bond)
		return NULL;
	return slave->bond;
}

static inline bool bond_is_lb(const struct bonding *bond)
{
	return BOND_MODE_IS_LB(bond->params.mode);
}

static inline void bond_set_active_slave(struct slave *slave)
{
	slave->backup = 0;
}

static inline void bond_set_backup_slave(struct slave *slave)
{
	slave->backup = 1;
}

static inline int bond_slave_state(struct slave *slave)
{
	return slave->backup;
}

static inline bool bond_is_active_slave(struct slave *slave)
{
	return !bond_slave_state(slave);
}

#define BOND_PRI_RESELECT_ALWAYS	0
#define BOND_PRI_RESELECT_BETTER	1
#define BOND_PRI_RESELECT_FAILURE	2

#define BOND_FOM_NONE			0
#define BOND_FOM_ACTIVE			1
#define BOND_FOM_FOLLOW			2

#define BOND_ARP_TARGETS_ANY		0
#define BOND_ARP_TARGETS_ALL		1

#define BOND_ARP_VALIDATE_NONE		0
#define BOND_ARP_VALIDATE_ACTIVE	(1 << BOND_STATE_ACTIVE)
#define BOND_ARP_VALIDATE_BACKUP	(1 << BOND_STATE_BACKUP)
#define BOND_ARP_VALIDATE_ALL		(BOND_ARP_VALIDATE_ACTIVE | \
					 BOND_ARP_VALIDATE_BACKUP)

static inline int slave_do_arp_validate(struct bonding *bond,
					struct slave *slave)
{
	return bond->params.arp_validate & (1 << bond_slave_state(slave));
}

/* Get the oldest arp which we've received on this slave for bond's
 * arp_targets.
 */
static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
						       struct slave *slave)
{
	int i = 1;
	unsigned long ret = slave->target_last_arp_rx[0];

	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
		if (time_before(slave->target_last_arp_rx[i], ret))
			ret = slave->target_last_arp_rx[i];

	return ret;
}

static inline unsigned long slave_last_rx(struct bonding *bond,
					struct slave *slave)
{
	if (slave_do_arp_validate(bond, slave)) {
		if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
			return slave_oldest_target_arp_rx(bond, slave);
		else
			return slave->last_arp_rx;
	}

	return slave->dev->last_rx;
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static inline void bond_netpoll_send_skb(const struct slave *slave,
					 struct sk_buff *skb)
{
	struct netpoll *np = slave->np;

	if (np)
		netpoll_send_skb(np, skb);
}
#else
static inline void bond_netpoll_send_skb(const struct slave *slave,
					 struct sk_buff *skb)
{
}
#endif

static inline void bond_set_slave_inactive_flags(struct slave *slave)
{
	if (!bond_is_lb(slave->bond))
		bond_set_backup_slave(slave);
	if (!slave->bond->params.all_slaves_active)
		slave->inactive = 1;
}

static inline void bond_set_slave_active_flags(struct slave *slave)
{
	bond_set_active_slave(slave);
	slave->inactive = 0;
}

static inline bool bond_is_slave_inactive(struct slave *slave)
{
	return slave->inactive;
}

static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
{
	struct in_device *in_dev;
	__be32 addr = 0;

	rcu_read_lock();
	in_dev = __in_dev_get_rcu(dev);

	if (in_dev)
		addr = inet_confirm_addr(in_dev, dst, local, RT_SCOPE_HOST);

	rcu_read_unlock();
	return addr;
}

static inline bool slave_can_tx(struct slave *slave)
{
	if (IS_UP(slave->dev) && slave->link == BOND_LINK_UP &&
	    bond_is_active_slave(slave))
		return true;
	else
		return false;
}

struct bond_net;

int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
void bond_xmit_slave_id(struct bonding *bond, struct sk_buff *skb, int slave_id);
int bond_create(struct net *net, const char *name);
int bond_create_sysfs(struct bond_net *net);
void bond_destroy_sysfs(struct bond_net *net);
void bond_prepare_sysfs_group(struct bonding *bond);
int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
void bond_mii_monitor(struct work_struct *);
void bond_loadbalance_arp_mon(struct work_struct *);
void bond_activebackup_arp_mon(struct work_struct *);
int bond_xmit_hash(struct bonding *bond, struct sk_buff *skb, int count);
int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl);
void bond_select_active_slave(struct bonding *bond);
void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
void bond_create_debugfs(void);
void bond_destroy_debugfs(void);
void bond_debug_register(struct bonding *bond);
void bond_debug_unregister(struct bonding *bond);
void bond_debug_reregister(struct bonding *bond);
const char *bond_mode_name(int mode);
void bond_setup(struct net_device *bond_dev);
unsigned int bond_get_num_tx_queues(void);
int bond_netlink_init(void);
void bond_netlink_fini(void);
int bond_option_mode_set(struct bonding *bond, int mode);
int bond_option_active_slave_set(struct bonding *bond, struct net_device *slave_dev);
struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
struct net_device *bond_option_active_slave_get(struct bonding *bond);

struct bond_net {
	struct net *		net;	/* Associated network namespace */
	struct list_head	dev_list;
#ifdef CONFIG_PROC_FS
	struct proc_dir_entry *	proc_dir;
#endif
	struct class_attribute	class_attr_bonding_masters;
};

#ifdef CONFIG_PROC_FS
void bond_create_proc_entry(struct bonding *bond);
void bond_remove_proc_entry(struct bonding *bond);
void bond_create_proc_dir(struct bond_net *bn);
void bond_destroy_proc_dir(struct bond_net *bn);
#else
static inline void bond_create_proc_entry(struct bonding *bond)
{
}

static inline void bond_remove_proc_entry(struct bonding *bond)
{
}

static inline void bond_create_proc_dir(struct bond_net *bn)
{
}

static inline void bond_destroy_proc_dir(struct bond_net *bn)
{
}
#endif

static inline struct slave *bond_slave_has_mac(struct bonding *bond,
					       const u8 *mac)
{
	struct list_head *iter;
	struct slave *tmp;

	bond_for_each_slave(bond, tmp, iter)
		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
			return tmp;

	return NULL;
}

/* Caller must hold rcu_read_lock() for read */
static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
					       const u8 *mac)
{
	struct list_head *iter;
	struct slave *tmp;

	bond_for_each_slave_rcu(bond, tmp, iter)
		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
			return tmp;

	return NULL;
}

/* Check if the ip is present in arp ip list, or first free slot if ip == 0
 * Returns -1 if not found, index if found
 */
static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
{
	int i;

	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
		if (targets[i] == ip)
			return i;
		else if (targets[i] == 0)
			break;

	return -1;
}

/* exported from bond_main.c */
extern int bond_net_id;
extern const struct bond_parm_tbl bond_lacp_tbl[];
extern const struct bond_parm_tbl bond_mode_tbl[];
extern const struct bond_parm_tbl xmit_hashtype_tbl[];
extern const struct bond_parm_tbl arp_validate_tbl[];
extern const struct bond_parm_tbl arp_all_targets_tbl[];
extern const struct bond_parm_tbl fail_over_mac_tbl[];
extern const struct bond_parm_tbl pri_reselect_tbl[];
extern struct bond_parm_tbl ad_select_tbl[];

/* exported from bond_netlink.c */
extern struct rtnl_link_ops bond_link_ops;

#endif /* _LINUX_BONDING_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
	3	*
	4	* Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
	5	* NCM: Network and Communications Management, Inc.
	6	*
	7	* BUT, I'm the one who modified it for ethernet, so:
	8	* (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
	9	*
	10	* This software may be used and distributed according to the terms
	11	* of the GNU Public License, incorporated herein by reference.
	12	*
1da177e4 LT	13	*/
	14
	15	#ifndef _LINUX_BONDING_H
	16	#define _LINUX_BONDING_H
	17
	18	#include <linux/timer.h>
	19	#include <linux/proc_fs.h>
	20	#include <linux/if_bonding.h>
e843fa50	21	#include <linux/cpumask.h>
305d552a	22	#include <linux/in6.h>
8a8efa22	23	#include <linux/netpoll.h>
eaddcd76	24	#include <linux/inetdevice.h>
567b871e	25	#include <linux/etherdevice.h>
1da177e4 LT	26	#include "bond_3ad.h"
	27	#include "bond_alb.h"
	28
ad246c99 BH	29	#define DRV_VERSION "3.7.1"
ad246c99 BH	30	#define DRV_RELDATE "April 27, 2011"
1da177e4 LT	31	#define DRV_NAME "bonding"
	32	#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
	33
bd33acc3 AW	34	#define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"
bd33acc3 AW	35
1da177e4 LT	36	#define BOND_MAX_ARP_TARGETS 16
1da177e4 LT	37
fe9d04af	38	#define BOND_DEFAULT_MIIMON 100
fe9d04af	39
1da177e4 LT	40	#define IS_UP(dev) \
	41	((((dev)->flags & IFF_UP) == IFF_UP) && \
	42	netif_running(dev) && \
	43	netif_carrier_ok(dev))
	44
1da177e4 LT	45	/*
	46	* Checks whether slave is ready for transmit.
	47	*/
	48	#define SLAVE_IS_OK(slave) \
	49	(((slave)->dev->flags & IFF_UP) && \
	50	netif_running((slave)->dev) && \
	51	((slave)->link == BOND_LINK_UP) && \
e30bc066	52	bond_is_active_slave(slave))
1da177e4 LT	53
	54
	55	#define USES_PRIMARY(mode) \
	56	(((mode) == BOND_MODE_ACTIVEBACKUP) \|\| \
	57	((mode) == BOND_MODE_TLB) \|\| \
	58	((mode) == BOND_MODE_ALB))
	59
fe9d04af	60	#define BOND_NO_USES_ARP(mode) \
	61	(((mode) == BOND_MODE_8023AD) \|\| \
	62	((mode) == BOND_MODE_TLB) \|\| \
	63	((mode) == BOND_MODE_ALB))
	64
bb1d9123 AG	65	#define TX_QUEUE_OVERRIDE(mode) \
	66	(((mode) == BOND_MODE_ACTIVEBACKUP) \|\| \
	67	((mode) == BOND_MODE_ROUNDROBIN))
72be35fe JP	68
	69	#define BOND_MODE_IS_LB(mode) \
	70	(((mode) == BOND_MODE_TLB) \|\| \
	71	((mode) == BOND_MODE_ALB))
	72
f9de11a1 WW	73	#define IS_IP_TARGET_UNUSABLE_ADDRESS(a) \
	74	((htonl(INADDR_BROADCAST) == a) \|\| \
	75	ipv4_is_zeronet(a))
1da177e4 LT	76	/*
	77	* Less bad way to call ioctl from within the kernel; this needs to be
	78	* done some other way to get the call out of interrupt context.
	79	* Needs "ioctl" variable to be supplied by calling context.
	80	*/
	81	#define IOCTL(dev, arg, cmd) ({ \
	82	int res = 0; \
	83	mm_segment_t fs = get_fs(); \
	84	set_fs(get_ds()); \
	85	res = ioctl(dev, arg, cmd); \
	86	set_fs(fs); \
	87	res; })
	88
dec1e90e	89	/* slave list primitives */
5a52405a VF	90	#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
	91
	92	#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
0965a1f3	93
dec1e90e	94	/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
dec1e90e	95	#define bond_first_slave(bond) \
5a52405a VF	96	(bond_has_slaves(bond) ? \
	97	netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
	98	NULL)
dec1e90e	99	#define bond_last_slave(bond) \
5a52405a VF	100	(bond_has_slaves(bond) ? \
	101	netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
	102	NULL)
dec1e90e	103
5a52405a VF	104	#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
5a52405a VF	105	#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
dec1e90e	106
1da177e4	107	/**
dec1e90e	108	* bond_for_each_slave - iterate over all slaves
	109	* @bond: the bond holding this list
	110	* @pos: current slave
9caff1e7	111	* @iter: list_head * iterator
1da177e4 LT	112	*
	113	* Caller must hold bond->lock
	114	*/
9caff1e7 VF	115	#define bond_for_each_slave(bond, pos, iter) \
9caff1e7 VF	116	netdev_for_each_lower_private((bond)->dev, pos, iter)
1da177e4	117
278b2083	118	/* Caller must have rcu_read_lock */
9caff1e7 VF	119	#define bond_for_each_slave_rcu(bond, pos, iter) \
9caff1e7 VF	120	netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
278b2083	121
e843fa50	122	#ifdef CONFIG_NET_POLL_CONTROLLER
fb4fa76a	123	extern atomic_t netpoll_block_tx;
e843fa50 NH	124
	125	static inline void block_netpoll_tx(void)
	126	{
fb4fa76a	127	atomic_inc(&netpoll_block_tx);
e843fa50 NH	128	}
	129
	130	static inline void unblock_netpoll_tx(void)
	131	{
fb4fa76a	132	atomic_dec(&netpoll_block_tx);
e843fa50 NH	133	}
	134
	135	static inline int is_netpoll_tx_blocked(struct net_device *dev)
	136	{
080e4130	137	if (unlikely(netpoll_tx_running(dev)))
fb4fa76a	138	return atomic_read(&netpoll_block_tx);
e843fa50 NH	139	return 0;
	140	}
	141	#else
	142	#define block_netpoll_tx()
	143	#define unblock_netpoll_tx()
	144	#define is_netpoll_tx_blocked(dev) (0)
	145	#endif
	146
1da177e4 LT	147	struct bond_params {
1da177e4 LT	148	int mode;
169a3e66	149	int xmit_policy;
1da177e4	150	int miimon;
ad246c99	151	u8 num_peer_notif;
1da177e4	152	int arp_interval;
f5b2b966	153	int arp_validate;
8599b52e	154	int arp_all_targets;
1da177e4	155	int use_carrier;
dd957c57	156	int fail_over_mac;
1da177e4 LT	157	int updelay;
	158	int downdelay;
	159	int lacp_fast;
655f8919	160	unsigned int min_links;
fd989c83	161	int ad_select;
1da177e4	162	char primary[IFNAMSIZ];
a549952a	163	int primary_reselect;
d3bb52b0	164	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
bb1d9123	165	int tx_queues;
ebd8e497	166	int all_slaves_active;
c2952c31	167	int resend_igmp;
7eacd038	168	int lp_interval;
73958329	169	int packets_per_slave;
1da177e4 LT	170	};
1da177e4 LT	171
12479f9a MW	172	struct bond_parm_tbl {
	173	char *modename;
	174	int mode;
	175	};
	176
ece95f7f JV	177	#define BOND_MAX_MODENAME_LEN 20
ece95f7f JV	178
1da177e4	179	struct slave {
e944ef79	180	struct net_device dev; / first - useful for panic debug */
35d48903	181	struct bonding bond; / our master */
8bb5f96b	182	int delay;
f8a8ccd5 AG	183	unsigned long jiffies;
f8a8ccd5 AG	184	unsigned long last_arp_rx;
8599b52e	185	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
1da177e4	186	s8 link; /* one of BOND_LINK_XXXX */
b2220cad	187	s8 new_link;
2d7011ca JP	188	u8 backup:1, /* indicates backup slave. Value corresponds with
	189	BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
	190	inactive:1; /* indicates inactive slave */
5d30530e	191	u8 duplex;
3158bf7d	192	u32 original_mtu;
1da177e4	193	u32 link_failure_count;
5d30530e	194	u32 speed;
bb1d9123	195	u16 queue_id;
5d30530e	196	u8 perm_hwaddr[ETH_ALEN];
1da177e4 LT	197	struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
1da177e4 LT	198	struct tlb_slave_info tlb_info;
8a8efa22 AW	199	#ifdef CONFIG_NET_POLL_CONTROLLER
	200	struct netpoll *np;
	201	#endif
1da177e4 LT	202	};
1da177e4 LT	203
b2220cad JV	204	/*
	205	* Link pseudo-state only used internally by monitors
	206	*/
	207	#define BOND_LINK_NOCHANGE -1
	208
1da177e4 LT	209	/*
	210	* Here are the locking policies for the two bonding locks:
	211	*
	212	* 1) Get bond->lock when reading/writing slave list.
	213	* 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
	214	* (It is unnecessary when the write-lock is put with bond->lock.)
	215	* 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
	216	* beforehand.
	217	*/
	218	struct bonding {
e944ef79	219	struct net_device dev; / first - useful for panic debug */
1da177e4 LT	220	struct slave *curr_active_slave;
	221	struct slave *current_arp_slave;
	222	struct slave *primary_slave;
a549952a	223	bool force_primary;
1da177e4	224	s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
de063b70 ED	225	int (recv_probe)(const struct sk_buff , struct bonding *,
de063b70 ED	226	struct slave *);
1da177e4 LT	227	rwlock_t lock;
1da177e4 LT	228	rwlock_t curr_slave_lock;
ad246c99	229	u8 send_peer_notif;
4f5474e7	230	u8 igmp_retrans;
1da177e4 LT	231	#ifdef CONFIG_PROC_FS
	232	struct proc_dir_entry *proc_entry;
	233	char proc_file_name[IFNAMSIZ];
	234	#endif /* CONFIG_PROC_FS */
	235	struct list_head bond_list;
73958329	236	u32 rr_tx_counter;
1da177e4 LT	237	struct ad_bond_info ad_info;
	238	struct alb_bond_info alb_info;
	239	struct bond_params params;
1b76b316 JV	240	struct workqueue_struct *wq;
	241	struct delayed_work mii_work;
	242	struct delayed_work arp_work;
	243	struct delayed_work alb_work;
	244	struct delayed_work ad_work;
5a37e8ca	245	struct delayed_work mcast_work;
f073c7ca	246	#ifdef CONFIG_DEBUG_FS
02582e9b	247	/* debugging support via debugfs */
f073c7ca TI	248	struct dentry *debug_dir;
f073c7ca TI	249	#endif /* CONFIG_DEBUG_FS */
1da177e4 LT	250	};
1da177e4 LT	251
f1c1775a JP	252	#define bond_slave_get_rcu(dev) \
	253	((struct slave *) rcu_dereference(dev->rx_handler_data))
	254
471cb5a3 JP	255	#define bond_slave_get_rtnl(dev) \
	256	((struct slave *) rtnl_dereference(dev->rx_handler_data))
	257
1da177e4 LT	258	/**
	259	* Returns NULL if the net_device does not belong to any of the bond's slaves
	260	*
	261	* Caller must hold bond lock for read
	262	*/
4ec952b8	263	static inline struct slave bond_get_slave_by_dev(struct bonding bond,
4ec952b8	264	struct net_device *slave_dev)
1da177e4	265	{
46bb4807	266	return netdev_lower_dev_get_private(bond->dev, slave_dev);
1da177e4 LT	267	}
1da177e4 LT	268
cceb904f	269	static inline struct bonding bond_get_bond_by_slave(struct slave slave)
1da177e4	270	{
471cb5a3	271	if (!slave \|\| !slave->bond)
1da177e4	272	return NULL;
471cb5a3	273	return slave->bond;
1da177e4 LT	274	}
1da177e4 LT	275
58402054 HE	276	static inline bool bond_is_lb(const struct bonding *bond)
58402054 HE	277	{
72be35fe	278	return BOND_MODE_IS_LB(bond->params.mode);
58402054 HE	279	}
58402054 HE	280
e30bc066 JP	281	static inline void bond_set_active_slave(struct slave *slave)
	282	{
	283	slave->backup = 0;
	284	}
	285
	286	static inline void bond_set_backup_slave(struct slave *slave)
	287	{
	288	slave->backup = 1;
	289	}
	290
	291	static inline int bond_slave_state(struct slave *slave)
	292	{
	293	return slave->backup;
	294	}
	295
	296	static inline bool bond_is_active_slave(struct slave *slave)
	297	{
	298	return !bond_slave_state(slave);
	299	}
	300
a549952a JP	301	#define BOND_PRI_RESELECT_ALWAYS 0
	302	#define BOND_PRI_RESELECT_BETTER 1
	303	#define BOND_PRI_RESELECT_FAILURE 2
	304
3915c1e8 JV	305	#define BOND_FOM_NONE 0
	306	#define BOND_FOM_ACTIVE 1
	307	#define BOND_FOM_FOLLOW 2
	308
8599b52e VF	309	#define BOND_ARP_TARGETS_ANY 0
	310	#define BOND_ARP_TARGETS_ALL 1
	311
f5b2b966 JV	312	#define BOND_ARP_VALIDATE_NONE 0
	313	#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
	314	#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
	315	#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE \| \
	316	BOND_ARP_VALIDATE_BACKUP)
	317
079ca7da AB	318	static inline int slave_do_arp_validate(struct bonding *bond,
079ca7da AB	319	struct slave *slave)
f5b2b966	320	{
e30bc066	321	return bond->params.arp_validate & (1 << bond_slave_state(slave));
f5b2b966 JV	322	}
f5b2b966 JV	323
8599b52e VF	324	/* Get the oldest arp which we've received on this slave for bond's
	325	* arp_targets.
	326	*/
	327	static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
	328	struct slave *slave)
	329	{
	330	int i = 1;
	331	unsigned long ret = slave->target_last_arp_rx[0];
	332
	333	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
	334	if (time_before(slave->target_last_arp_rx[i], ret))
	335	ret = slave->target_last_arp_rx[i];
	336
	337	return ret;
	338	}
	339
079ca7da	340	static inline unsigned long slave_last_rx(struct bonding *bond,
f8a8ccd5	341	struct slave *slave)
f5b2b966	342	{
8599b52e VF	343	if (slave_do_arp_validate(bond, slave)) {
	344	if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
	345	return slave_oldest_target_arp_rx(bond, slave);
	346	else
	347	return slave->last_arp_rx;
	348	}
f5b2b966 JV	349
	350	return slave->dev->last_rx;
	351	}
	352
8a8efa22 AW	353	#ifdef CONFIG_NET_POLL_CONTROLLER
	354	static inline void bond_netpoll_send_skb(const struct slave *slave,
	355	struct sk_buff *skb)
	356	{
	357	struct netpoll *np = slave->np;
	358
	359	if (np)
	360	netpoll_send_skb(np, skb);
	361	}
	362	#else
	363	static inline void bond_netpoll_send_skb(const struct slave *slave,
	364	struct sk_buff *skb)
	365	{
	366	}
	367	#endif
	368
cceb904f	369	static inline void bond_set_slave_inactive_flags(struct slave *slave)
1da177e4	370	{
471cb5a3	371	if (!bond_is_lb(slave->bond))
e30bc066	372	bond_set_backup_slave(slave);
471cb5a3	373	if (!slave->bond->params.all_slaves_active)
2d7011ca	374	slave->inactive = 1;
1da177e4 LT	375	}
1da177e4 LT	376
cceb904f	377	static inline void bond_set_slave_active_flags(struct slave *slave)
1da177e4	378	{
e30bc066	379	bond_set_active_slave(slave);
2d7011ca JP	380	slave->inactive = 0;
	381	}
	382
	383	static inline bool bond_is_slave_inactive(struct slave *slave)
	384	{
	385	return slave->inactive;
1da177e4 LT	386	}
1da177e4 LT	387
eaddcd76 AG	388	static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
	389	{
	390	struct in_device *in_dev;
	391	__be32 addr = 0;
	392
	393	rcu_read_lock();
	394	in_dev = __in_dev_get_rcu(dev);
	395
	396	if (in_dev)
	397	addr = inet_confirm_addr(in_dev, dst, local, RT_SCOPE_HOST);
	398
	399	rcu_read_unlock();
	400	return addr;
	401	}
	402
15077228 NA	403	static inline bool slave_can_tx(struct slave *slave)
	404	{
	405	if (IS_UP(slave->dev) && slave->link == BOND_LINK_UP &&
	406	bond_is_active_slave(slave))
	407	return true;
	408	else
	409	return false;
	410	}
	411
4c22400a EB	412	struct bond_net;
4c22400a EB	413
5bb9e0b5	414	int bond_arp_rcv(const struct sk_buff skb, struct bonding bond, struct slave *slave);
1da177e4	415	int bond_dev_queue_xmit(struct bonding bond, struct sk_buff skb, struct net_device *slave_dev);
15077228	416	void bond_xmit_slave_id(struct bonding bond, struct sk_buff skb, int slave_id);
ec87fd3b	417	int bond_create(struct net net, const char name);
4c22400a EB	418	int bond_create_sysfs(struct bond_net *net);
4c22400a EB	419	void bond_destroy_sysfs(struct bond_net *net);
6151b3d4	420	void bond_prepare_sysfs_group(struct bonding *bond);
a77b5325 MW	421	int bond_enslave(struct net_device bond_dev, struct net_device slave_dev);
a77b5325 MW	422	int bond_release(struct net_device bond_dev, struct net_device slave_dev);
1b76b316 JV	423	void bond_mii_monitor(struct work_struct *);
	424	void bond_loadbalance_arp_mon(struct work_struct *);
	425	void bond_activebackup_arp_mon(struct work_struct *);
32819dc1	426	int bond_xmit_hash(struct bonding bond, struct sk_buff skb, int count);
325dcf7a	427	int bond_parse_parm(const char mode_arg, const struct bond_parm_tbl tbl);
a77b5325 MW	428	void bond_select_active_slave(struct bonding *bond);
a77b5325 MW	429	void bond_change_active_slave(struct bonding bond, struct slave new_active);
f073c7ca TI	430	void bond_create_debugfs(void);
	431	void bond_destroy_debugfs(void);
	432	void bond_debug_register(struct bonding *bond);
	433	void bond_debug_unregister(struct bonding *bond);
	434	void bond_debug_reregister(struct bonding *bond);
d30ee670	435	const char *bond_mode_name(int mode);
0a2a78c4 JP	436	void bond_setup(struct net_device *bond_dev);
	437	unsigned int bond_get_num_tx_queues(void);
	438	int bond_netlink_init(void);
	439	void bond_netlink_fini(void);
72be35fe	440	int bond_option_mode_set(struct bonding *bond, int mode);
d9e32b21	441	int bond_option_active_slave_set(struct bonding bond, struct net_device slave_dev);
752d48b5 JP	442	struct net_device bond_option_active_slave_get_rcu(struct bonding bond);
752d48b5 JP	443	struct net_device bond_option_active_slave_get(struct bonding bond);
1da177e4	444
ec87fd3b EB	445	struct bond_net {
	446	struct net * net; /* Associated network namespace */
	447	struct list_head dev_list;
	448	#ifdef CONFIG_PROC_FS
	449	struct proc_dir_entry * proc_dir;
	450	#endif
4c22400a	451	struct class_attribute class_attr_bonding_masters;
ec87fd3b EB	452	};
ec87fd3b EB	453
bd33acc3 AW	454	#ifdef CONFIG_PROC_FS
	455	void bond_create_proc_entry(struct bonding *bond);
	456	void bond_remove_proc_entry(struct bonding *bond);
	457	void bond_create_proc_dir(struct bond_net *bn);
	458	void bond_destroy_proc_dir(struct bond_net *bn);
	459	#else
	460	static inline void bond_create_proc_entry(struct bonding *bond)
	461	{
	462	}
	463
	464	static inline void bond_remove_proc_entry(struct bonding *bond)
	465	{
	466	}
	467
	468	static inline void bond_create_proc_dir(struct bond_net *bn)
	469	{
	470	}
	471
	472	static inline void bond_destroy_proc_dir(struct bond_net *bn)
	473	{
	474	}
	475	#endif
	476
567b871e	477	static inline struct slave bond_slave_has_mac(struct bonding bond,
	478	const u8 *mac)
	479	{
9caff1e7	480	struct list_head *iter;
567b871e	481	struct slave *tmp;
567b871e	482
9caff1e7	483	bond_for_each_slave(bond, tmp, iter)
567b871e	484	if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
	485	return tmp;
	486
	487	return NULL;
	488	}
bd33acc3	489
28c71926	490	/* Caller must hold rcu_read_lock() for read */
	491	static inline struct slave bond_slave_has_mac_rcu(struct bonding bond,
	492	const u8 *mac)
	493	{
	494	struct list_head *iter;
	495	struct slave *tmp;
	496
	497	bond_for_each_slave_rcu(bond, tmp, iter)
	498	if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
	499	return tmp;
	500
	501	return NULL;
	502	}
	503
87a7b84b VF	504	/* Check if the ip is present in arp ip list, or first free slot if ip == 0
	505	* Returns -1 if not found, index if found
	506	*/
	507	static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
	508	{
	509	int i;
	510
	511	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
	512	if (targets[i] == ip)
	513	return i;
	514	else if (targets[i] == 0)
	515	break;
	516
	517	return -1;
	518	}
	519
b2259672	520	/* exported from bond_main.c */
ec87fd3b	521	extern int bond_net_id;
e97fd7c6 HE	522	extern const struct bond_parm_tbl bond_lacp_tbl[];
	523	extern const struct bond_parm_tbl bond_mode_tbl[];
	524	extern const struct bond_parm_tbl xmit_hashtype_tbl[];
	525	extern const struct bond_parm_tbl arp_validate_tbl[];
8599b52e	526	extern const struct bond_parm_tbl arp_all_targets_tbl[];
e97fd7c6	527	extern const struct bond_parm_tbl fail_over_mac_tbl[];
a549952a	528	extern const struct bond_parm_tbl pri_reselect_tbl[];
b06715b7 HE	529	extern struct bond_parm_tbl ad_select_tbl[];
b06715b7 HE	530
0a2a78c4 JP	531	/* exported from bond_netlink.c */
	532	extern struct rtnl_link_ops bond_link_ops;
	533
1da177e4	534	#endif /* _LINUX_BONDING_H */