tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 *
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>
21#include <linux/kobject.h>
22#include <linux/in6.h>
23#include "bond_3ad.h"
24#include "bond_alb.h"
25
26#define DRV_VERSION "3.6.0"
27#define DRV_RELDATE "September 26, 2009"
28#define DRV_NAME "bonding"
29#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
30
31#define BOND_MAX_ARP_TARGETS 16
32
33#define IS_UP(dev) \
34 ((((dev)->flags & IFF_UP) == IFF_UP) && \
35 netif_running(dev) && \
36 netif_carrier_ok(dev))
37
38/*
39 * Checks whether bond is ready for transmit.
40 *
41 * Caller must hold bond->lock
42 */
43#define BOND_IS_OK(bond) \
44 (((bond)->dev->flags & IFF_UP) && \
45 netif_running((bond)->dev) && \
46 ((bond)->slave_cnt > 0))
47
48/*
49 * Checks whether slave is ready for transmit.
50 */
51#define SLAVE_IS_OK(slave) \
52 (((slave)->dev->flags & IFF_UP) && \
53 netif_running((slave)->dev) && \
54 ((slave)->link == BOND_LINK_UP) && \
55 ((slave)->state == BOND_STATE_ACTIVE))
56
57
58#define USES_PRIMARY(mode) \
59 (((mode) == BOND_MODE_ACTIVEBACKUP) || \
60 ((mode) == BOND_MODE_TLB) || \
61 ((mode) == BOND_MODE_ALB))
62
63/*
64 * Less bad way to call ioctl from within the kernel; this needs to be
65 * done some other way to get the call out of interrupt context.
66 * Needs "ioctl" variable to be supplied by calling context.
67 */
68#define IOCTL(dev, arg, cmd) ({ \
69 int res = 0; \
70 mm_segment_t fs = get_fs(); \
71 set_fs(get_ds()); \
72 res = ioctl(dev, arg, cmd); \
73 set_fs(fs); \
74 res; })
75
76/**
77 * bond_for_each_slave_from - iterate the slaves list from a starting point
78 * @bond: the bond holding this list.
79 * @pos: current slave.
80 * @cnt: counter for max number of moves
81 * @start: starting point.
82 *
83 * Caller must hold bond->lock
84 */
85#define bond_for_each_slave_from(bond, pos, cnt, start) \
86 for (cnt = 0, pos = start; \
87 cnt < (bond)->slave_cnt; \
88 cnt++, pos = (pos)->next)
89
90/**
91 * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point
92 * @bond: the bond holding this list.
93 * @pos: current slave.
94 * @cnt: counter for number max of moves
95 * @start: start point.
96 * @stop: stop point.
97 *
98 * Caller must hold bond->lock
99 */
100#define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \
101 for (cnt = 0, pos = start; \
102 ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \
103 cnt++, pos = (pos)->next)
104
105/**
106 * bond_for_each_slave - iterate the slaves list from head
107 * @bond: the bond holding this list.
108 * @pos: current slave.
109 * @cnt: counter for max number of moves
110 *
111 * Caller must hold bond->lock
112 */
113#define bond_for_each_slave(bond, pos, cnt) \
114 bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
115
116
117struct bond_params {
118 int mode;
119 int xmit_policy;
120 int miimon;
121 int num_grat_arp;
122 int num_unsol_na;
123 int arp_interval;
124 int arp_validate;
125 int use_carrier;
126 int fail_over_mac;
127 int updelay;
128 int downdelay;
129 int lacp_fast;
130 int ad_select;
131 char primary[IFNAMSIZ];
132 int primary_reselect;
133 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
134};
135
136struct bond_parm_tbl {
137 char *modename;
138 int mode;
139};
140
141#define BOND_MAX_MODENAME_LEN 20
142
143struct vlan_entry {
144 struct list_head vlan_list;
145 __be32 vlan_ip;
146 unsigned short vlan_id;
147#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
148 struct in6_addr vlan_ipv6;
149#endif
150};
151
152struct slave {
153 struct net_device *dev; /* first - useful for panic debug */
154 struct slave *next;
155 struct slave *prev;
156 int delay;
157 unsigned long jiffies;
158 unsigned long last_arp_rx;
159 s8 link; /* one of BOND_LINK_XXXX */
160 s8 new_link;
161 s8 state; /* one of BOND_STATE_XXXX */
162 u32 original_flags;
163 u32 original_mtu;
164 u32 link_failure_count;
165 u8 perm_hwaddr[ETH_ALEN];
166 u16 speed;
167 u8 duplex;
168 struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
169 struct tlb_slave_info tlb_info;
170};
171
172/*
173 * Link pseudo-state only used internally by monitors
174 */
175#define BOND_LINK_NOCHANGE -1
176
177/*
178 * Here are the locking policies for the two bonding locks:
179 *
180 * 1) Get bond->lock when reading/writing slave list.
181 * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
182 * (It is unnecessary when the write-lock is put with bond->lock.)
183 * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
184 * beforehand.
185 */
186struct bonding {
187 struct net_device *dev; /* first - useful for panic debug */
188 struct slave *first_slave;
189 struct slave *curr_active_slave;
190 struct slave *current_arp_slave;
191 struct slave *primary_slave;
192 bool force_primary;
193 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
194 rwlock_t lock;
195 rwlock_t curr_slave_lock;
196 s8 kill_timers;
197 s8 send_grat_arp;
198 s8 send_unsol_na;
199 s8 setup_by_slave;
200 struct net_device_stats stats;
201#ifdef CONFIG_PROC_FS
202 struct proc_dir_entry *proc_entry;
203 char proc_file_name[IFNAMSIZ];
204#endif /* CONFIG_PROC_FS */
205 struct list_head bond_list;
206 struct dev_mc_list *mc_list;
207 int (*xmit_hash_policy)(struct sk_buff *, int);
208 __be32 master_ip;
209 u16 flags;
210 u16 rr_tx_counter;
211 struct ad_bond_info ad_info;
212 struct alb_bond_info alb_info;
213 struct bond_params params;
214 struct list_head vlan_list;
215 struct vlan_group *vlgrp;
216 struct packet_type arp_mon_pt;
217 struct workqueue_struct *wq;
218 struct delayed_work mii_work;
219 struct delayed_work arp_work;
220 struct delayed_work alb_work;
221 struct delayed_work ad_work;
222#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
223 struct in6_addr master_ipv6;
224#endif
225};
226
227/**
228 * Returns NULL if the net_device does not belong to any of the bond's slaves
229 *
230 * Caller must hold bond lock for read
231 */
232static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev)
233{
234 struct slave *slave = NULL;
235 int i;
236
237 bond_for_each_slave(bond, slave, i) {
238 if (slave->dev == slave_dev) {
239 break;
240 }
241 }
242
243 return slave;
244}
245
246static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
247{
248 if (!slave || !slave->dev->master) {
249 return NULL;
250 }
251
252 return (struct bonding *)netdev_priv(slave->dev->master);
253}
254
255static inline bool bond_is_lb(const struct bonding *bond)
256{
257 return (bond->params.mode == BOND_MODE_TLB ||
258 bond->params.mode == BOND_MODE_ALB);
259}
260
261#define BOND_PRI_RESELECT_ALWAYS 0
262#define BOND_PRI_RESELECT_BETTER 1
263#define BOND_PRI_RESELECT_FAILURE 2
264
265#define BOND_FOM_NONE 0
266#define BOND_FOM_ACTIVE 1
267#define BOND_FOM_FOLLOW 2
268
269#define BOND_ARP_VALIDATE_NONE 0
270#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
271#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
272#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
273 BOND_ARP_VALIDATE_BACKUP)
274
275static inline int slave_do_arp_validate(struct bonding *bond,
276 struct slave *slave)
277{
278 return bond->params.arp_validate & (1 << slave->state);
279}
280
281static inline unsigned long slave_last_rx(struct bonding *bond,
282 struct slave *slave)
283{
284 if (slave_do_arp_validate(bond, slave))
285 return slave->last_arp_rx;
286
287 return slave->dev->last_rx;
288}
289
290static inline void bond_set_slave_inactive_flags(struct slave *slave)
291{
292 struct bonding *bond = netdev_priv(slave->dev->master);
293 if (!bond_is_lb(bond))
294 slave->state = BOND_STATE_BACKUP;
295 slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
296 if (slave_do_arp_validate(bond, slave))
297 slave->dev->priv_flags |= IFF_SLAVE_NEEDARP;
298}
299
300static inline void bond_set_slave_active_flags(struct slave *slave)
301{
302 slave->state = BOND_STATE_ACTIVE;
303 slave->dev->priv_flags &= ~(IFF_SLAVE_INACTIVE | IFF_SLAVE_NEEDARP);
304}
305
306static inline void bond_set_master_3ad_flags(struct bonding *bond)
307{
308 bond->dev->priv_flags |= IFF_MASTER_8023AD;
309}
310
311static inline void bond_unset_master_3ad_flags(struct bonding *bond)
312{
313 bond->dev->priv_flags &= ~IFF_MASTER_8023AD;
314}
315
316static inline void bond_set_master_alb_flags(struct bonding *bond)
317{
318 bond->dev->priv_flags |= IFF_MASTER_ALB;
319}
320
321static inline void bond_unset_master_alb_flags(struct bonding *bond)
322{
323 bond->dev->priv_flags &= ~IFF_MASTER_ALB;
324}
325
326struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
327int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
328int bond_create(struct net *net, const char *name);
329int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev);
330int bond_create_sysfs(void);
331void bond_destroy_sysfs(void);
332void bond_prepare_sysfs_group(struct bonding *bond);
333int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave);
334void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave);
335int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
336int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
337void bond_mii_monitor(struct work_struct *);
338void bond_loadbalance_arp_mon(struct work_struct *);
339void bond_activebackup_arp_mon(struct work_struct *);
340void bond_set_mode_ops(struct bonding *bond, int mode);
341int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl);
342void bond_select_active_slave(struct bonding *bond);
343void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
344void bond_register_arp(struct bonding *);
345void bond_unregister_arp(struct bonding *);
346
347struct bond_net {
348 struct net * net; /* Associated network namespace */
349 struct list_head dev_list;
350#ifdef CONFIG_PROC_FS
351 struct proc_dir_entry * proc_dir;
352#endif
353};
354
355/* exported from bond_main.c */
356extern int bond_net_id;
357extern const struct bond_parm_tbl bond_lacp_tbl[];
358extern const struct bond_parm_tbl bond_mode_tbl[];
359extern const struct bond_parm_tbl xmit_hashtype_tbl[];
360extern const struct bond_parm_tbl arp_validate_tbl[];
361extern const struct bond_parm_tbl fail_over_mac_tbl[];
362extern const struct bond_parm_tbl pri_reselect_tbl[];
363extern struct bond_parm_tbl ad_select_tbl[];
364
365#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
366void bond_send_unsolicited_na(struct bonding *bond);
367void bond_register_ipv6_notifier(void);
368void bond_unregister_ipv6_notifier(void);
369#else
370static inline void bond_send_unsolicited_na(struct bonding *bond)
371{
372 return;
373}
374static inline void bond_register_ipv6_notifier(void)
375{
376 return;
377}
378static inline void bond_unregister_ipv6_notifier(void)
379{
380 return;
381}
382#endif
383
384#endif /* _LINUX_BONDING_H */