| /* |
| * 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 _NET_BONDING_H |
| #define _NET_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 <net/bond_3ad.h> |
| #include <net/bond_alb.h> |
| #include <net/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); |
| int bond_set_carrier(struct bonding *bond); |
| 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; |
| |
| static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb) |
| { |
| atomic_long_inc(&dev->tx_dropped); |
| dev_kfree_skb_any(skb); |
| } |
| |
| #endif /* _NET_BONDING_H */ |