2 * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
4 * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
5 * NCM: Network and Communications Management, Inc.
7 * BUT, I'm the one who modified it for ethernet, so:
8 * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
10 * This software may be used and distributed according to the terms
11 * of the GNU Public License, incorporated herein by reference.
15 #ifndef _LINUX_BONDING_H
16 #define _LINUX_BONDING_H
18 #include <linux/timer.h>
19 #include <linux/proc_fs.h>
20 #include <linux/if_bonding.h>
21 #include <linux/cpumask.h>
22 #include <linux/in6.h>
23 #include <linux/netpoll.h>
27 #define DRV_VERSION "3.7.1"
28 #define DRV_RELDATE "April 27, 2011"
29 #define DRV_NAME "bonding"
30 #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
32 #define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"
34 #define BOND_MAX_ARP_TARGETS 16
37 ((((dev)->flags & IFF_UP) == IFF_UP) && \
38 netif_running(dev) && \
39 netif_carrier_ok(dev))
42 * Checks whether bond is ready for transmit.
44 * Caller must hold bond->lock
46 #define BOND_IS_OK(bond) \
47 (((bond)->dev->flags & IFF_UP) && \
48 netif_running((bond)->dev) && \
49 ((bond)->slave_cnt > 0))
52 * Checks whether slave is ready for transmit.
54 #define SLAVE_IS_OK(slave) \
55 (((slave)->dev->flags & IFF_UP) && \
56 netif_running((slave)->dev) && \
57 ((slave)->link == BOND_LINK_UP) && \
58 bond_is_active_slave(slave))
61 #define USES_PRIMARY(mode) \
62 (((mode) == BOND_MODE_ACTIVEBACKUP) || \
63 ((mode) == BOND_MODE_TLB) || \
64 ((mode) == BOND_MODE_ALB))
66 #define TX_QUEUE_OVERRIDE(mode) \
67 (((mode) == BOND_MODE_ACTIVEBACKUP) || \
68 ((mode) == BOND_MODE_ROUNDROBIN))
70 * Less bad way to call ioctl from within the kernel; this needs to be
71 * done some other way to get the call out of interrupt context.
72 * Needs "ioctl" variable to be supplied by calling context.
74 #define IOCTL(dev, arg, cmd) ({ \
76 mm_segment_t fs = get_fs(); \
78 res = ioctl(dev, arg, cmd); \
83 * bond_for_each_slave_from - iterate the slaves list from a starting point
84 * @bond: the bond holding this list.
85 * @pos: current slave.
86 * @cnt: counter for max number of moves
87 * @start: starting point.
89 * Caller must hold bond->lock
91 #define bond_for_each_slave_from(bond, pos, cnt, start) \
92 for (cnt = 0, pos = start; \
93 cnt < (bond)->slave_cnt; \
94 cnt++, pos = (pos)->next)
97 * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point
98 * @bond: the bond holding this list.
99 * @pos: current slave.
100 * @cnt: counter for number max of moves
101 * @start: start point.
104 * Caller must hold bond->lock
106 #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \
107 for (cnt = 0, pos = start; \
108 ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \
109 cnt++, pos = (pos)->next)
112 * bond_for_each_slave - iterate the slaves list from head
113 * @bond: the bond holding this list.
114 * @pos: current slave.
115 * @cnt: counter for max number of moves
117 * Caller must hold bond->lock
119 #define bond_for_each_slave(bond, pos, cnt) \
120 bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
123 #ifdef CONFIG_NET_POLL_CONTROLLER
124 extern atomic_t netpoll_block_tx;
126 static inline void block_netpoll_tx(void)
128 atomic_inc(&netpoll_block_tx);
131 static inline void unblock_netpoll_tx(void)
133 atomic_dec(&netpoll_block_tx);
136 static inline int is_netpoll_tx_blocked(struct net_device *dev)
138 if (unlikely(netpoll_tx_running(dev)))
139 return atomic_read(&netpoll_block_tx);
143 #define block_netpoll_tx()
144 #define unblock_netpoll_tx()
145 #define is_netpoll_tx_blocked(dev) (0)
161 char primary[IFNAMSIZ];
162 int primary_reselect;
163 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
165 int all_slaves_active;
169 struct bond_parm_tbl {
174 #define BOND_MAX_MODENAME_LEN 20
177 struct list_head vlan_list;
179 unsigned short vlan_id;
183 struct net_device *dev; /* first - useful for panic debug */
186 struct bonding *bond; /* our master */
188 unsigned long jiffies;
189 unsigned long last_arp_rx;
190 s8 link; /* one of BOND_LINK_XXXX */
192 u8 backup:1, /* indicates backup slave. Value corresponds with
193 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
194 inactive:1; /* indicates inactive slave */
197 u32 link_failure_count;
200 u8 perm_hwaddr[ETH_ALEN];
201 struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
202 struct tlb_slave_info tlb_info;
203 #ifdef CONFIG_NET_POLL_CONTROLLER
209 * Link pseudo-state only used internally by monitors
211 #define BOND_LINK_NOCHANGE -1
214 * Here are the locking policies for the two bonding locks:
216 * 1) Get bond->lock when reading/writing slave list.
217 * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
218 * (It is unnecessary when the write-lock is put with bond->lock.)
219 * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
223 struct net_device *dev; /* first - useful for panic debug */
224 struct slave *first_slave;
225 struct slave *curr_active_slave;
226 struct slave *current_arp_slave;
227 struct slave *primary_slave;
229 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
230 void (*recv_probe)(struct sk_buff *, struct bonding *,
233 rwlock_t curr_slave_lock;
238 #ifdef CONFIG_PROC_FS
239 struct proc_dir_entry *proc_entry;
240 char proc_file_name[IFNAMSIZ];
241 #endif /* CONFIG_PROC_FS */
242 struct list_head bond_list;
243 struct netdev_hw_addr_list mc_list;
244 int (*xmit_hash_policy)(struct sk_buff *, int);
248 struct ad_bond_info ad_info;
249 struct alb_bond_info alb_info;
250 struct bond_params params;
251 struct list_head vlan_list;
252 struct vlan_group *vlgrp;
253 struct packet_type arp_mon_pt;
254 struct workqueue_struct *wq;
255 struct delayed_work mii_work;
256 struct delayed_work arp_work;
257 struct delayed_work alb_work;
258 struct delayed_work ad_work;
259 struct delayed_work mcast_work;
260 #ifdef CONFIG_DEBUG_FS
261 /* debugging suport via debugfs */
262 struct dentry *debug_dir;
263 #endif /* CONFIG_DEBUG_FS */
266 #define bond_slave_get_rcu(dev) \
267 ((struct slave *) rcu_dereference(dev->rx_handler_data))
270 * Returns NULL if the net_device does not belong to any of the bond's slaves
272 * Caller must hold bond lock for read
274 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
275 struct net_device *slave_dev)
277 struct slave *slave = NULL;
280 bond_for_each_slave(bond, slave, i) {
281 if (slave->dev == slave_dev) {
289 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
291 if (!slave || !slave->dev->master) {
295 return netdev_priv(slave->dev->master);
298 static inline bool bond_is_lb(const struct bonding *bond)
300 return (bond->params.mode == BOND_MODE_TLB ||
301 bond->params.mode == BOND_MODE_ALB);
304 static inline void bond_set_active_slave(struct slave *slave)
309 static inline void bond_set_backup_slave(struct slave *slave)
314 static inline int bond_slave_state(struct slave *slave)
316 return slave->backup;
319 static inline bool bond_is_active_slave(struct slave *slave)
321 return !bond_slave_state(slave);
324 #define BOND_PRI_RESELECT_ALWAYS 0
325 #define BOND_PRI_RESELECT_BETTER 1
326 #define BOND_PRI_RESELECT_FAILURE 2
328 #define BOND_FOM_NONE 0
329 #define BOND_FOM_ACTIVE 1
330 #define BOND_FOM_FOLLOW 2
332 #define BOND_ARP_VALIDATE_NONE 0
333 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
334 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
335 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
336 BOND_ARP_VALIDATE_BACKUP)
338 static inline int slave_do_arp_validate(struct bonding *bond,
341 return bond->params.arp_validate & (1 << bond_slave_state(slave));
344 static inline unsigned long slave_last_rx(struct bonding *bond,
347 if (slave_do_arp_validate(bond, slave))
348 return slave->last_arp_rx;
350 return slave->dev->last_rx;
353 #ifdef CONFIG_NET_POLL_CONTROLLER
354 static inline void bond_netpoll_send_skb(const struct slave *slave,
357 struct netpoll *np = slave->np;
360 netpoll_send_skb(np, skb);
363 static inline void bond_netpoll_send_skb(const struct slave *slave,
369 static inline void bond_set_slave_inactive_flags(struct slave *slave)
371 struct bonding *bond = netdev_priv(slave->dev->master);
372 if (!bond_is_lb(bond))
373 bond_set_backup_slave(slave);
374 if (!bond->params.all_slaves_active)
378 static inline void bond_set_slave_active_flags(struct slave *slave)
380 bond_set_active_slave(slave);
384 static inline bool bond_is_slave_inactive(struct slave *slave)
386 return slave->inactive;
389 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
390 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
391 int bond_create(struct net *net, const char *name);
392 int bond_create_sysfs(void);
393 void bond_destroy_sysfs(void);
394 void bond_prepare_sysfs_group(struct bonding *bond);
395 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave);
396 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave);
397 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
398 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
399 void bond_mii_monitor(struct work_struct *);
400 void bond_loadbalance_arp_mon(struct work_struct *);
401 void bond_activebackup_arp_mon(struct work_struct *);
402 void bond_set_mode_ops(struct bonding *bond, int mode);
403 int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl);
404 void bond_select_active_slave(struct bonding *bond);
405 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
406 void bond_create_debugfs(void);
407 void bond_destroy_debugfs(void);
408 void bond_debug_register(struct bonding *bond);
409 void bond_debug_unregister(struct bonding *bond);
410 void bond_debug_reregister(struct bonding *bond);
411 const char *bond_mode_name(int mode);
414 struct net * net; /* Associated network namespace */
415 struct list_head dev_list;
416 #ifdef CONFIG_PROC_FS
417 struct proc_dir_entry * proc_dir;
421 #ifdef CONFIG_PROC_FS
422 void bond_create_proc_entry(struct bonding *bond);
423 void bond_remove_proc_entry(struct bonding *bond);
424 void bond_create_proc_dir(struct bond_net *bn);
425 void bond_destroy_proc_dir(struct bond_net *bn);
427 static inline void bond_create_proc_entry(struct bonding *bond)
431 static inline void bond_remove_proc_entry(struct bonding *bond)
435 static inline void bond_create_proc_dir(struct bond_net *bn)
439 static inline void bond_destroy_proc_dir(struct bond_net *bn)
445 /* exported from bond_main.c */
446 extern int bond_net_id;
447 extern const struct bond_parm_tbl bond_lacp_tbl[];
448 extern const struct bond_parm_tbl bond_mode_tbl[];
449 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
450 extern const struct bond_parm_tbl arp_validate_tbl[];
451 extern const struct bond_parm_tbl fail_over_mac_tbl[];
452 extern const struct bond_parm_tbl pri_reselect_tbl[];
453 extern struct bond_parm_tbl ad_select_tbl[];
455 #endif /* _LINUX_BONDING_H */