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Diffstat (limited to 'drivers/net/bonding/bonding.h')
| -rw-r--r-- | drivers/net/bonding/bonding.h | 648 |
1 files changed, 0 insertions, 648 deletions
diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h deleted file mode 100644 index 10920f0686e2..000000000000 --- a/drivers/net/bonding/bonding.h +++ /dev/null @@ -1,648 +0,0 @@ -/* - * 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 <linux/reciprocal_div.h> -#include <linux/if_link.h> - -#include "bond_3ad.h" -#include "bond_alb.h" -#include "bond_options.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 - -/* - * 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; }) - -#define BOND_MODE(bond) ((bond)->params.mode) - -/* 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) - -/* Caller must have rcu_read_lock */ -#define bond_first_slave_rcu(bond) \ - netdev_lower_get_first_private_rcu(bond->dev) - -#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 RTNL - */ -#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; - int tlb_dynamic_lb; - struct reciprocal_value reciprocal_packets_per_slave; -}; - -struct bond_parm_tbl { - char *modename; - int mode; -}; - -struct slave { - struct net_device *dev; /* first - useful for panic debug */ - struct bonding *bond; /* our master */ - int delay; - /* all three in jiffies */ - unsigned long last_link_up; - unsigned long last_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 */ - should_notify:1; /* indicateds whether the state changed */ - 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; - struct tlb_slave_info tlb_info; -#ifdef CONFIG_NET_POLL_CONTROLLER - struct netpoll *np; -#endif - struct kobject kobj; - struct rtnl_link_stats64 slave_stats; -}; - -struct bond_up_slave { - unsigned int count; - struct rcu_head rcu; - struct slave *arr[0]; -}; - -/* - * Link pseudo-state only used internally by monitors - */ -#define BOND_LINK_NOCHANGE -1 - -/* - * Here are the locking policies for the two bonding locks: - * Get rcu_read_lock when reading or RTNL when writing slave list. - */ -struct bonding { - struct net_device *dev; /* first - useful for panic debug */ - struct slave __rcu *curr_active_slave; - struct slave __rcu *current_arp_slave; - struct slave __rcu *primary_slave; - struct bond_up_slave __rcu *slave_arr; /* Array of usable slaves */ - 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 *); - /* mode_lock is used for mode-specific locking needs, currently used by: - * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and - * bond_3ad_state_machine_handler() concurrently and also - * the access to the state machine shared variables. - * TLB mode (5) - to sync the use and modifications of its hash table - * ALB mode (6) - to sync the use and modifications of its hash table - */ - spinlock_t mode_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; - struct delayed_work slave_arr_work; -#ifdef CONFIG_DEBUG_FS - /* debugging support via debugfs */ - struct dentry *debug_dir; -#endif /* CONFIG_DEBUG_FS */ - struct rtnl_link_stats64 bond_stats; -}; - -#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)) - -struct bond_vlan_tag { - __be16 vlan_proto; - unsigned short vlan_id; -}; - -/** - * 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) -{ - return slave->bond; -} - -static inline bool bond_should_override_tx_queue(struct bonding *bond) -{ - return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP || - BOND_MODE(bond) == BOND_MODE_ROUNDROBIN; -} - -static inline bool bond_is_lb(const struct bonding *bond) -{ - return BOND_MODE(bond) == BOND_MODE_TLB || - BOND_MODE(bond) == BOND_MODE_ALB; -} - -static inline bool bond_is_nondyn_tlb(const struct bonding *bond) -{ - return (BOND_MODE(bond) == BOND_MODE_TLB) && - (bond->params.tlb_dynamic_lb == 0); -} - -static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond) -{ - return (BOND_MODE(bond) == BOND_MODE_8023AD || - BOND_MODE(bond) == BOND_MODE_XOR || - bond_is_nondyn_tlb(bond)); -} - -static inline bool bond_mode_uses_arp(int mode) -{ - return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB && - mode != BOND_MODE_ALB; -} - -static inline bool bond_mode_uses_primary(int mode) -{ - return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB || - mode == BOND_MODE_ALB; -} - -static inline bool bond_uses_primary(struct bonding *bond) -{ - return bond_mode_uses_primary(BOND_MODE(bond)); -} - -static inline bool bond_slave_is_up(struct slave *slave) -{ - return netif_running(slave->dev) && netif_carrier_ok(slave->dev); -} - -static inline void bond_set_active_slave(struct slave *slave) -{ - if (slave->backup) { - slave->backup = 0; - rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC); - } -} - -static inline void bond_set_backup_slave(struct slave *slave) -{ - if (!slave->backup) { - slave->backup = 1; - rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC); - } -} - -static inline void bond_set_slave_state(struct slave *slave, - int slave_state, bool notify) -{ - if (slave->backup == slave_state) - return; - - slave->backup = slave_state; - if (notify) { - rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC); - slave->should_notify = 0; - } else { - if (slave->should_notify) - slave->should_notify = 0; - else - slave->should_notify = 1; - } -} - -static inline void bond_slave_state_change(struct bonding *bond) -{ - struct list_head *iter; - struct slave *tmp; - - bond_for_each_slave(bond, tmp, iter) { - if (tmp->link == BOND_LINK_UP) - bond_set_active_slave(tmp); - else if (tmp->link == BOND_LINK_DOWN) - bond_set_backup_slave(tmp); - } -} - -static inline void bond_slave_state_notify(struct bonding *bond) -{ - struct list_head *iter; - struct slave *tmp; - - bond_for_each_slave(bond, tmp, iter) { - if (tmp->should_notify) { - rtmsg_ifinfo(RTM_NEWLINK, tmp->dev, 0, GFP_ATOMIC); - tmp->should_notify = 0; - } - } -} - -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); -} - -static inline bool bond_slave_can_tx(struct slave *slave) -{ - return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP && - bond_is_active_slave(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) -#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1) -#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \ - BOND_ARP_FILTER) -#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \ - BOND_ARP_FILTER) - -#define BOND_SLAVE_NOTIFY_NOW true -#define BOND_SLAVE_NOTIFY_LATER false - -static inline int slave_do_arp_validate(struct bonding *bond, - struct slave *slave) -{ - return bond->params.arp_validate & (1 << bond_slave_state(slave)); -} - -static inline int slave_do_arp_validate_only(struct bonding *bond) -{ - return bond->params.arp_validate & BOND_ARP_FILTER; -} - -static inline int bond_is_ip_target_ok(__be32 addr) -{ - return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr); -} - -/* 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 (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL) - return slave_oldest_target_arp_rx(bond, slave); - - return slave->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, - bool notify) -{ - if (!bond_is_lb(slave->bond)) - bond_set_slave_state(slave, BOND_STATE_BACKUP, notify); - if (!slave->bond->params.all_slaves_active) - slave->inactive = 1; -} - -static inline void bond_set_slave_active_flags(struct slave *slave, - bool notify) -{ - bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify); - 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(dev_net(dev), in_dev, dst, local, - RT_SCOPE_HOST); - rcu_read_unlock(); - return addr; -} - -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; -}; - -int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave); -void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); -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_sysfs_slave_add(struct slave *slave); -void bond_sysfs_slave_del(struct slave *slave); -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); -u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb); -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); -struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond); -const char *bond_slave_link_status(s8 link); -struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev, - struct net_device *end_dev, - int level); -int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave); -void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay); - -#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; -} - -/* Caller must hold rcu_read_lock() for read */ -static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac) -{ - struct list_head *iter; - struct slave *tmp; - struct netdev_hw_addr *ha; - - bond_for_each_slave_rcu(bond, tmp, iter) - if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) - return true; - - if (netdev_uc_empty(bond->dev)) - return false; - - netdev_for_each_uc_addr(ha, bond->dev) - if (ether_addr_equal_64bits(mac, ha->addr)) - return true; - - return false; -} - -/* 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 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 */ |