2 * originally based on the dummy device.
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
7 * bonding.c: an Ethernet Bonding driver
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
14 * and probably many L2 switches ...
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
24 * will release all slaves, marking them as down.
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
34 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/fcntl.h>
40 #include <linux/interrupt.h>
41 #include <linux/ptrace.h>
42 #include <linux/ioport.h>
46 #include <linux/tcp.h>
47 #include <linux/udp.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/init.h>
51 #include <linux/timer.h>
52 #include <linux/socket.h>
53 #include <linux/ctype.h>
54 #include <linux/inet.h>
55 #include <linux/bitops.h>
57 #include <asm/system.h>
59 #include <linux/uaccess.h>
60 #include <linux/errno.h>
61 #include <linux/netdevice.h>
62 #include <linux/inetdevice.h>
63 #include <linux/igmp.h>
64 #include <linux/etherdevice.h>
65 #include <linux/skbuff.h>
67 #include <linux/rtnetlink.h>
68 #include <linux/proc_fs.h>
69 #include <linux/seq_file.h>
70 #include <linux/smp.h>
71 #include <linux/if_ether.h>
73 #include <linux/mii.h>
74 #include <linux/ethtool.h>
75 #include <linux/if_vlan.h>
76 #include <linux/if_bonding.h>
77 #include <linux/jiffies.h>
78 #include <linux/preempt.h>
79 #include <net/route.h>
80 #include <net/net_namespace.h>
81 #include <net/netns/generic.h>
86 /*---------------------------- Module parameters ----------------------------*/
88 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
89 #define BOND_LINK_MON_INTERV 0
90 #define BOND_LINK_ARP_INTERV 0
92 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
93 static int tx_queues
= BOND_DEFAULT_TX_QUEUES
;
94 static int num_grat_arp
= 1;
95 static int num_unsol_na
= 1;
96 static int miimon
= BOND_LINK_MON_INTERV
;
99 static int use_carrier
= 1;
101 static char *primary
;
102 static char *primary_reselect
;
103 static char *lacp_rate
;
104 static char *ad_select
;
105 static char *xmit_hash_policy
;
106 static int arp_interval
= BOND_LINK_ARP_INTERV
;
107 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
];
108 static char *arp_validate
;
109 static char *fail_over_mac
;
110 static int all_slaves_active
= 0;
111 static struct bond_params bonding_defaults
;
112 static int resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
114 module_param(max_bonds
, int, 0);
115 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
116 module_param(tx_queues
, int, 0);
117 MODULE_PARM_DESC(tx_queues
, "Max number of transmit queues (default = 16)");
118 module_param(num_grat_arp
, int, 0644);
119 MODULE_PARM_DESC(num_grat_arp
, "Number of gratuitous ARP packets to send on failover event");
120 module_param(num_unsol_na
, int, 0644);
121 MODULE_PARM_DESC(num_unsol_na
, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event");
122 module_param(miimon
, int, 0);
123 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
124 module_param(updelay
, int, 0);
125 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
126 module_param(downdelay
, int, 0);
127 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
129 module_param(use_carrier
, int, 0);
130 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
131 "0 for off, 1 for on (default)");
132 module_param(mode
, charp
, 0);
133 MODULE_PARM_DESC(mode
, "Mode of operation : 0 for balance-rr, "
134 "1 for active-backup, 2 for balance-xor, "
135 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
136 "6 for balance-alb");
137 module_param(primary
, charp
, 0);
138 MODULE_PARM_DESC(primary
, "Primary network device to use");
139 module_param(primary_reselect
, charp
, 0);
140 MODULE_PARM_DESC(primary_reselect
, "Reselect primary slave "
142 "0 for always (default), "
143 "1 for only if speed of primary is "
145 "2 for only on active slave "
147 module_param(lacp_rate
, charp
, 0);
148 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner "
150 module_param(ad_select
, charp
, 0);
151 MODULE_PARM_DESC(ad_select
, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)");
152 module_param(xmit_hash_policy
, charp
, 0);
153 MODULE_PARM_DESC(xmit_hash_policy
, "XOR hashing method: 0 for layer 2 (default)"
154 ", 1 for layer 3+4");
155 module_param(arp_interval
, int, 0);
156 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
157 module_param_array(arp_ip_target
, charp
, NULL
, 0);
158 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
159 module_param(arp_validate
, charp
, 0);
160 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes: none (default), active, backup or all");
161 module_param(fail_over_mac
, charp
, 0);
162 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
163 module_param(all_slaves_active
, int, 0);
164 MODULE_PARM_DESC(all_slaves_active
, "Keep all frames received on an interface"
165 "by setting active flag for all slaves. "
166 "0 for never (default), 1 for always.");
167 module_param(resend_igmp
, int, 0);
168 MODULE_PARM_DESC(resend_igmp
, "Number of IGMP membership reports to send on link failure");
170 /*----------------------------- Global variables ----------------------------*/
172 #ifdef CONFIG_NET_POLL_CONTROLLER
173 atomic_t netpoll_block_tx
= ATOMIC_INIT(0);
176 static const char * const version
=
177 DRV_DESCRIPTION
": v" DRV_VERSION
" (" DRV_RELDATE
")\n";
179 int bond_net_id __read_mostly
;
181 static __be32 arp_target
[BOND_MAX_ARP_TARGETS
];
182 static int arp_ip_count
;
183 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
184 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
185 static int lacp_fast
;
187 const struct bond_parm_tbl bond_lacp_tbl
[] = {
188 { "slow", AD_LACP_SLOW
},
189 { "fast", AD_LACP_FAST
},
193 const struct bond_parm_tbl bond_mode_tbl
[] = {
194 { "balance-rr", BOND_MODE_ROUNDROBIN
},
195 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
196 { "balance-xor", BOND_MODE_XOR
},
197 { "broadcast", BOND_MODE_BROADCAST
},
198 { "802.3ad", BOND_MODE_8023AD
},
199 { "balance-tlb", BOND_MODE_TLB
},
200 { "balance-alb", BOND_MODE_ALB
},
204 const struct bond_parm_tbl xmit_hashtype_tbl
[] = {
205 { "layer2", BOND_XMIT_POLICY_LAYER2
},
206 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
207 { "layer2+3", BOND_XMIT_POLICY_LAYER23
},
211 const struct bond_parm_tbl arp_validate_tbl
[] = {
212 { "none", BOND_ARP_VALIDATE_NONE
},
213 { "active", BOND_ARP_VALIDATE_ACTIVE
},
214 { "backup", BOND_ARP_VALIDATE_BACKUP
},
215 { "all", BOND_ARP_VALIDATE_ALL
},
219 const struct bond_parm_tbl fail_over_mac_tbl
[] = {
220 { "none", BOND_FOM_NONE
},
221 { "active", BOND_FOM_ACTIVE
},
222 { "follow", BOND_FOM_FOLLOW
},
226 const struct bond_parm_tbl pri_reselect_tbl
[] = {
227 { "always", BOND_PRI_RESELECT_ALWAYS
},
228 { "better", BOND_PRI_RESELECT_BETTER
},
229 { "failure", BOND_PRI_RESELECT_FAILURE
},
233 struct bond_parm_tbl ad_select_tbl
[] = {
234 { "stable", BOND_AD_STABLE
},
235 { "bandwidth", BOND_AD_BANDWIDTH
},
236 { "count", BOND_AD_COUNT
},
240 /*-------------------------- Forward declarations ---------------------------*/
242 static void bond_send_gratuitous_arp(struct bonding
*bond
);
243 static int bond_init(struct net_device
*bond_dev
);
244 static void bond_uninit(struct net_device
*bond_dev
);
246 /*---------------------------- General routines -----------------------------*/
248 static const char *bond_mode_name(int mode
)
250 static const char *names
[] = {
251 [BOND_MODE_ROUNDROBIN
] = "load balancing (round-robin)",
252 [BOND_MODE_ACTIVEBACKUP
] = "fault-tolerance (active-backup)",
253 [BOND_MODE_XOR
] = "load balancing (xor)",
254 [BOND_MODE_BROADCAST
] = "fault-tolerance (broadcast)",
255 [BOND_MODE_8023AD
] = "IEEE 802.3ad Dynamic link aggregation",
256 [BOND_MODE_TLB
] = "transmit load balancing",
257 [BOND_MODE_ALB
] = "adaptive load balancing",
260 if (mode
< 0 || mode
> BOND_MODE_ALB
)
266 /*---------------------------------- VLAN -----------------------------------*/
269 * bond_add_vlan - add a new vlan id on bond
270 * @bond: bond that got the notification
271 * @vlan_id: the vlan id to add
273 * Returns -ENOMEM if allocation failed.
275 static int bond_add_vlan(struct bonding
*bond
, unsigned short vlan_id
)
277 struct vlan_entry
*vlan
;
279 pr_debug("bond: %s, vlan id %d\n",
280 (bond
? bond
->dev
->name
: "None"), vlan_id
);
282 vlan
= kzalloc(sizeof(struct vlan_entry
), GFP_KERNEL
);
286 INIT_LIST_HEAD(&vlan
->vlan_list
);
287 vlan
->vlan_id
= vlan_id
;
289 write_lock_bh(&bond
->lock
);
291 list_add_tail(&vlan
->vlan_list
, &bond
->vlan_list
);
293 write_unlock_bh(&bond
->lock
);
295 pr_debug("added VLAN ID %d on bond %s\n", vlan_id
, bond
->dev
->name
);
301 * bond_del_vlan - delete a vlan id from bond
302 * @bond: bond that got the notification
303 * @vlan_id: the vlan id to delete
305 * returns -ENODEV if @vlan_id was not found in @bond.
307 static int bond_del_vlan(struct bonding
*bond
, unsigned short vlan_id
)
309 struct vlan_entry
*vlan
;
312 pr_debug("bond: %s, vlan id %d\n", bond
->dev
->name
, vlan_id
);
315 write_lock_bh(&bond
->lock
);
317 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
318 if (vlan
->vlan_id
== vlan_id
) {
319 list_del(&vlan
->vlan_list
);
321 if (bond_is_lb(bond
))
322 bond_alb_clear_vlan(bond
, vlan_id
);
324 pr_debug("removed VLAN ID %d from bond %s\n",
325 vlan_id
, bond
->dev
->name
);
329 if (list_empty(&bond
->vlan_list
) &&
330 (bond
->slave_cnt
== 0)) {
331 /* Last VLAN removed and no slaves, so
332 * restore block on adding VLANs. This will
333 * be removed once new slaves that are not
334 * VLAN challenged will be added.
336 bond
->dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
344 pr_debug("couldn't find VLAN ID %d in bond %s\n",
345 vlan_id
, bond
->dev
->name
);
348 write_unlock_bh(&bond
->lock
);
349 unblock_netpoll_tx();
354 * bond_has_challenged_slaves
355 * @bond: the bond we're working on
357 * Searches the slave list. Returns 1 if a vlan challenged slave
358 * was found, 0 otherwise.
360 * Assumes bond->lock is held.
362 static int bond_has_challenged_slaves(struct bonding
*bond
)
367 bond_for_each_slave(bond
, slave
, i
) {
368 if (slave
->dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
369 pr_debug("found VLAN challenged slave - %s\n",
375 pr_debug("no VLAN challenged slaves found\n");
380 * bond_next_vlan - safely skip to the next item in the vlans list.
381 * @bond: the bond we're working on
382 * @curr: item we're advancing from
384 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
385 * or @curr->next otherwise (even if it is @curr itself again).
387 * Caller must hold bond->lock
389 struct vlan_entry
*bond_next_vlan(struct bonding
*bond
, struct vlan_entry
*curr
)
391 struct vlan_entry
*next
, *last
;
393 if (list_empty(&bond
->vlan_list
))
397 next
= list_entry(bond
->vlan_list
.next
,
398 struct vlan_entry
, vlan_list
);
400 last
= list_entry(bond
->vlan_list
.prev
,
401 struct vlan_entry
, vlan_list
);
403 next
= list_entry(bond
->vlan_list
.next
,
404 struct vlan_entry
, vlan_list
);
406 next
= list_entry(curr
->vlan_list
.next
,
407 struct vlan_entry
, vlan_list
);
415 * bond_dev_queue_xmit - Prepare skb for xmit.
417 * @bond: bond device that got this skb for tx.
418 * @skb: hw accel VLAN tagged skb to transmit
419 * @slave_dev: slave that is supposed to xmit this skbuff
421 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
422 struct net_device
*slave_dev
)
424 skb
->dev
= slave_dev
;
426 if (unlikely(netpoll_tx_running(slave_dev
)))
427 bond_netpoll_send_skb(bond_get_slave_by_dev(bond
, slave_dev
), skb
);
435 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
436 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
438 * a. This operation is performed in IOCTL context,
439 * b. The operation is protected by the RTNL semaphore in the 8021q code,
440 * c. Holding a lock with BH disabled while directly calling a base driver
441 * entry point is generally a BAD idea.
443 * The design of synchronization/protection for this operation in the 8021q
444 * module is good for one or more VLAN devices over a single physical device
445 * and cannot be extended for a teaming solution like bonding, so there is a
446 * potential race condition here where a net device from the vlan group might
447 * be referenced (either by a base driver or the 8021q code) while it is being
448 * removed from the system. However, it turns out we're not making matters
449 * worse, and if it works for regular VLAN usage it will work here too.
453 * bond_vlan_rx_register - Propagates registration to slaves
454 * @bond_dev: bonding net device that got called
455 * @grp: vlan group being registered
457 static void bond_vlan_rx_register(struct net_device
*bond_dev
,
458 struct vlan_group
*grp
)
460 struct bonding
*bond
= netdev_priv(bond_dev
);
464 write_lock_bh(&bond
->lock
);
466 write_unlock_bh(&bond
->lock
);
468 bond_for_each_slave(bond
, slave
, i
) {
469 struct net_device
*slave_dev
= slave
->dev
;
470 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
472 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
473 slave_ops
->ndo_vlan_rx_register
) {
474 slave_ops
->ndo_vlan_rx_register(slave_dev
, grp
);
480 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
481 * @bond_dev: bonding net device that got called
482 * @vid: vlan id being added
484 static void bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
486 struct bonding
*bond
= netdev_priv(bond_dev
);
490 bond_for_each_slave(bond
, slave
, i
) {
491 struct net_device
*slave_dev
= slave
->dev
;
492 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
494 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
495 slave_ops
->ndo_vlan_rx_add_vid
) {
496 slave_ops
->ndo_vlan_rx_add_vid(slave_dev
, vid
);
500 res
= bond_add_vlan(bond
, vid
);
502 pr_err("%s: Error: Failed to add vlan id %d\n",
503 bond_dev
->name
, vid
);
508 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
509 * @bond_dev: bonding net device that got called
510 * @vid: vlan id being removed
512 static void bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
514 struct bonding
*bond
= netdev_priv(bond_dev
);
516 struct net_device
*vlan_dev
;
519 bond_for_each_slave(bond
, slave
, i
) {
520 struct net_device
*slave_dev
= slave
->dev
;
521 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
523 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
524 slave_ops
->ndo_vlan_rx_kill_vid
) {
525 /* Save and then restore vlan_dev in the grp array,
526 * since the slave's driver might clear it.
528 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vid
);
529 slave_ops
->ndo_vlan_rx_kill_vid(slave_dev
, vid
);
530 vlan_group_set_device(bond
->vlgrp
, vid
, vlan_dev
);
534 res
= bond_del_vlan(bond
, vid
);
536 pr_err("%s: Error: Failed to remove vlan id %d\n",
537 bond_dev
->name
, vid
);
541 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
543 struct vlan_entry
*vlan
;
544 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
549 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
550 slave_ops
->ndo_vlan_rx_register
)
551 slave_ops
->ndo_vlan_rx_register(slave_dev
, bond
->vlgrp
);
553 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
554 !(slave_ops
->ndo_vlan_rx_add_vid
))
557 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
)
558 slave_ops
->ndo_vlan_rx_add_vid(slave_dev
, vlan
->vlan_id
);
561 static void bond_del_vlans_from_slave(struct bonding
*bond
,
562 struct net_device
*slave_dev
)
564 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
565 struct vlan_entry
*vlan
;
566 struct net_device
*vlan_dev
;
571 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
572 !(slave_ops
->ndo_vlan_rx_kill_vid
))
575 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
578 /* Save and then restore vlan_dev in the grp array,
579 * since the slave's driver might clear it.
581 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
582 slave_ops
->ndo_vlan_rx_kill_vid(slave_dev
, vlan
->vlan_id
);
583 vlan_group_set_device(bond
->vlgrp
, vlan
->vlan_id
, vlan_dev
);
587 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
588 slave_ops
->ndo_vlan_rx_register
)
589 slave_ops
->ndo_vlan_rx_register(slave_dev
, NULL
);
592 /*------------------------------- Link status -------------------------------*/
595 * Set the carrier state for the master according to the state of its
596 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
597 * do special 802.3ad magic.
599 * Returns zero if carrier state does not change, nonzero if it does.
601 static int bond_set_carrier(struct bonding
*bond
)
606 if (bond
->slave_cnt
== 0)
609 if (bond
->params
.mode
== BOND_MODE_8023AD
)
610 return bond_3ad_set_carrier(bond
);
612 bond_for_each_slave(bond
, slave
, i
) {
613 if (slave
->link
== BOND_LINK_UP
) {
614 if (!netif_carrier_ok(bond
->dev
)) {
615 netif_carrier_on(bond
->dev
);
623 if (netif_carrier_ok(bond
->dev
)) {
624 netif_carrier_off(bond
->dev
);
631 * Get link speed and duplex from the slave's base driver
632 * using ethtool. If for some reason the call fails or the
633 * values are invalid, fake speed and duplex to 100/Full
636 static int bond_update_speed_duplex(struct slave
*slave
)
638 struct net_device
*slave_dev
= slave
->dev
;
639 struct ethtool_cmd etool
;
642 /* Fake speed and duplex */
643 slave
->speed
= SPEED_100
;
644 slave
->duplex
= DUPLEX_FULL
;
646 if (!slave_dev
->ethtool_ops
|| !slave_dev
->ethtool_ops
->get_settings
)
649 res
= slave_dev
->ethtool_ops
->get_settings(slave_dev
, &etool
);
653 switch (etool
.speed
) {
663 switch (etool
.duplex
) {
671 slave
->speed
= etool
.speed
;
672 slave
->duplex
= etool
.duplex
;
678 * if <dev> supports MII link status reporting, check its link status.
680 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
681 * depending upon the setting of the use_carrier parameter.
683 * Return either BMSR_LSTATUS, meaning that the link is up (or we
684 * can't tell and just pretend it is), or 0, meaning that the link is
687 * If reporting is non-zero, instead of faking link up, return -1 if
688 * both ETHTOOL and MII ioctls fail (meaning the device does not
689 * support them). If use_carrier is set, return whatever it says.
690 * It'd be nice if there was a good way to tell if a driver supports
691 * netif_carrier, but there really isn't.
693 static int bond_check_dev_link(struct bonding
*bond
,
694 struct net_device
*slave_dev
, int reporting
)
696 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
697 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
699 struct mii_ioctl_data
*mii
;
701 if (!reporting
&& !netif_running(slave_dev
))
704 if (bond
->params
.use_carrier
)
705 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
707 /* Try to get link status using Ethtool first. */
708 if (slave_dev
->ethtool_ops
) {
709 if (slave_dev
->ethtool_ops
->get_link
) {
712 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
714 return link
? BMSR_LSTATUS
: 0;
718 /* Ethtool can't be used, fallback to MII ioctls. */
719 ioctl
= slave_ops
->ndo_do_ioctl
;
721 /* TODO: set pointer to correct ioctl on a per team member */
722 /* bases to make this more efficient. that is, once */
723 /* we determine the correct ioctl, we will always */
724 /* call it and not the others for that team */
728 * We cannot assume that SIOCGMIIPHY will also read a
729 * register; not all network drivers (e.g., e100)
733 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
734 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
736 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
737 mii
->reg_num
= MII_BMSR
;
738 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
739 return mii
->val_out
& BMSR_LSTATUS
;
744 * If reporting, report that either there's no dev->do_ioctl,
745 * or both SIOCGMIIREG and get_link failed (meaning that we
746 * cannot report link status). If not reporting, pretend
749 return reporting
? -1 : BMSR_LSTATUS
;
752 /*----------------------------- Multicast list ------------------------------*/
755 * Push the promiscuity flag down to appropriate slaves
757 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
760 if (USES_PRIMARY(bond
->params
.mode
)) {
761 /* write lock already acquired */
762 if (bond
->curr_active_slave
) {
763 err
= dev_set_promiscuity(bond
->curr_active_slave
->dev
,
769 bond_for_each_slave(bond
, slave
, i
) {
770 err
= dev_set_promiscuity(slave
->dev
, inc
);
779 * Push the allmulti flag down to all slaves
781 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
784 if (USES_PRIMARY(bond
->params
.mode
)) {
785 /* write lock already acquired */
786 if (bond
->curr_active_slave
) {
787 err
= dev_set_allmulti(bond
->curr_active_slave
->dev
,
793 bond_for_each_slave(bond
, slave
, i
) {
794 err
= dev_set_allmulti(slave
->dev
, inc
);
803 * Add a Multicast address to slaves
806 static void bond_mc_add(struct bonding
*bond
, void *addr
)
808 if (USES_PRIMARY(bond
->params
.mode
)) {
809 /* write lock already acquired */
810 if (bond
->curr_active_slave
)
811 dev_mc_add(bond
->curr_active_slave
->dev
, addr
);
816 bond_for_each_slave(bond
, slave
, i
)
817 dev_mc_add(slave
->dev
, addr
);
822 * Remove a multicast address from slave
825 static void bond_mc_del(struct bonding
*bond
, void *addr
)
827 if (USES_PRIMARY(bond
->params
.mode
)) {
828 /* write lock already acquired */
829 if (bond
->curr_active_slave
)
830 dev_mc_del(bond
->curr_active_slave
->dev
, addr
);
834 bond_for_each_slave(bond
, slave
, i
) {
835 dev_mc_del(slave
->dev
, addr
);
841 static void __bond_resend_igmp_join_requests(struct net_device
*dev
)
843 struct in_device
*in_dev
;
846 in_dev
= __in_dev_get_rcu(dev
);
848 ip_mc_rejoin_groups(in_dev
);
853 * Retrieve the list of registered multicast addresses for the bonding
854 * device and retransmit an IGMP JOIN request to the current active
857 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
859 struct net_device
*vlan_dev
;
860 struct vlan_entry
*vlan
;
862 read_lock(&bond
->lock
);
864 /* rejoin all groups on bond device */
865 __bond_resend_igmp_join_requests(bond
->dev
);
867 /* rejoin all groups on vlan devices */
869 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
870 vlan_dev
= vlan_group_get_device(bond
->vlgrp
,
873 __bond_resend_igmp_join_requests(vlan_dev
);
877 if (--bond
->igmp_retrans
> 0)
878 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
880 read_unlock(&bond
->lock
);
883 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
885 struct bonding
*bond
= container_of(work
, struct bonding
,
887 bond_resend_igmp_join_requests(bond
);
891 * flush all members of flush->mc_list from device dev->mc_list
893 static void bond_mc_list_flush(struct net_device
*bond_dev
,
894 struct net_device
*slave_dev
)
896 struct bonding
*bond
= netdev_priv(bond_dev
);
897 struct netdev_hw_addr
*ha
;
899 netdev_for_each_mc_addr(ha
, bond_dev
)
900 dev_mc_del(slave_dev
, ha
->addr
);
902 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
903 /* del lacpdu mc addr from mc list */
904 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
906 dev_mc_del(slave_dev
, lacpdu_multicast
);
910 /*--------------------------- Active slave change ---------------------------*/
913 * Update the mc list and multicast-related flags for the new and
914 * old active slaves (if any) according to the multicast mode, and
915 * promiscuous flags unconditionally.
917 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
,
918 struct slave
*old_active
)
920 struct netdev_hw_addr
*ha
;
922 if (!USES_PRIMARY(bond
->params
.mode
))
923 /* nothing to do - mc list is already up-to-date on
929 if (bond
->dev
->flags
& IFF_PROMISC
)
930 dev_set_promiscuity(old_active
->dev
, -1);
932 if (bond
->dev
->flags
& IFF_ALLMULTI
)
933 dev_set_allmulti(old_active
->dev
, -1);
935 netdev_for_each_mc_addr(ha
, bond
->dev
)
936 dev_mc_del(old_active
->dev
, ha
->addr
);
940 /* FIXME: Signal errors upstream. */
941 if (bond
->dev
->flags
& IFF_PROMISC
)
942 dev_set_promiscuity(new_active
->dev
, 1);
944 if (bond
->dev
->flags
& IFF_ALLMULTI
)
945 dev_set_allmulti(new_active
->dev
, 1);
947 netdev_for_each_mc_addr(ha
, bond
->dev
)
948 dev_mc_add(new_active
->dev
, ha
->addr
);
953 * bond_do_fail_over_mac
955 * Perform special MAC address swapping for fail_over_mac settings
957 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
959 static void bond_do_fail_over_mac(struct bonding
*bond
,
960 struct slave
*new_active
,
961 struct slave
*old_active
)
962 __releases(&bond
->curr_slave_lock
)
963 __releases(&bond
->lock
)
964 __acquires(&bond
->lock
)
965 __acquires(&bond
->curr_slave_lock
)
967 u8 tmp_mac
[ETH_ALEN
];
968 struct sockaddr saddr
;
971 switch (bond
->params
.fail_over_mac
) {
972 case BOND_FOM_ACTIVE
:
974 memcpy(bond
->dev
->dev_addr
, new_active
->dev
->dev_addr
,
975 new_active
->dev
->addr_len
);
977 case BOND_FOM_FOLLOW
:
979 * if new_active && old_active, swap them
980 * if just old_active, do nothing (going to no active slave)
981 * if just new_active, set new_active to bond's MAC
986 write_unlock_bh(&bond
->curr_slave_lock
);
987 read_unlock(&bond
->lock
);
990 memcpy(tmp_mac
, new_active
->dev
->dev_addr
, ETH_ALEN
);
991 memcpy(saddr
.sa_data
, old_active
->dev
->dev_addr
,
993 saddr
.sa_family
= new_active
->dev
->type
;
995 memcpy(saddr
.sa_data
, bond
->dev
->dev_addr
, ETH_ALEN
);
996 saddr
.sa_family
= bond
->dev
->type
;
999 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
1001 pr_err("%s: Error %d setting MAC of slave %s\n",
1002 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
1009 memcpy(saddr
.sa_data
, tmp_mac
, ETH_ALEN
);
1010 saddr
.sa_family
= old_active
->dev
->type
;
1012 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
1014 pr_err("%s: Error %d setting MAC of slave %s\n",
1015 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
1017 read_lock(&bond
->lock
);
1018 write_lock_bh(&bond
->curr_slave_lock
);
1021 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
1022 bond
->dev
->name
, bond
->params
.fail_over_mac
);
1028 static bool bond_should_change_active(struct bonding
*bond
)
1030 struct slave
*prim
= bond
->primary_slave
;
1031 struct slave
*curr
= bond
->curr_active_slave
;
1033 if (!prim
|| !curr
|| curr
->link
!= BOND_LINK_UP
)
1035 if (bond
->force_primary
) {
1036 bond
->force_primary
= false;
1039 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_BETTER
&&
1040 (prim
->speed
< curr
->speed
||
1041 (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)))
1043 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_FAILURE
)
1049 * find_best_interface - select the best available slave to be the active one
1050 * @bond: our bonding struct
1052 * Warning: Caller must hold curr_slave_lock for writing.
1054 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
1056 struct slave
*new_active
, *old_active
;
1057 struct slave
*bestslave
= NULL
;
1058 int mintime
= bond
->params
.updelay
;
1061 new_active
= bond
->curr_active_slave
;
1063 if (!new_active
) { /* there were no active slaves left */
1064 if (bond
->slave_cnt
> 0) /* found one slave */
1065 new_active
= bond
->first_slave
;
1067 return NULL
; /* still no slave, return NULL */
1070 if ((bond
->primary_slave
) &&
1071 bond
->primary_slave
->link
== BOND_LINK_UP
&&
1072 bond_should_change_active(bond
)) {
1073 new_active
= bond
->primary_slave
;
1076 /* remember where to stop iterating over the slaves */
1077 old_active
= new_active
;
1079 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
1080 if (new_active
->link
== BOND_LINK_UP
) {
1082 } else if (new_active
->link
== BOND_LINK_BACK
&&
1083 IS_UP(new_active
->dev
)) {
1084 /* link up, but waiting for stabilization */
1085 if (new_active
->delay
< mintime
) {
1086 mintime
= new_active
->delay
;
1087 bestslave
= new_active
;
1096 * change_active_interface - change the active slave into the specified one
1097 * @bond: our bonding struct
1098 * @new: the new slave to make the active one
1100 * Set the new slave to the bond's settings and unset them on the old
1101 * curr_active_slave.
1102 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1104 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1105 * because it is apparently the best available slave we have, even though its
1106 * updelay hasn't timed out yet.
1108 * If new_active is not NULL, caller must hold bond->lock for read and
1109 * curr_slave_lock for write_bh.
1111 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1113 struct slave
*old_active
= bond
->curr_active_slave
;
1115 if (old_active
== new_active
)
1119 new_active
->jiffies
= jiffies
;
1121 if (new_active
->link
== BOND_LINK_BACK
) {
1122 if (USES_PRIMARY(bond
->params
.mode
)) {
1123 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1124 bond
->dev
->name
, new_active
->dev
->name
,
1125 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1128 new_active
->delay
= 0;
1129 new_active
->link
= BOND_LINK_UP
;
1131 if (bond
->params
.mode
== BOND_MODE_8023AD
)
1132 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1134 if (bond_is_lb(bond
))
1135 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1137 if (USES_PRIMARY(bond
->params
.mode
)) {
1138 pr_info("%s: making interface %s the new active one.\n",
1139 bond
->dev
->name
, new_active
->dev
->name
);
1144 if (USES_PRIMARY(bond
->params
.mode
))
1145 bond_mc_swap(bond
, new_active
, old_active
);
1147 if (bond_is_lb(bond
)) {
1148 bond_alb_handle_active_change(bond
, new_active
);
1150 bond_set_slave_inactive_flags(old_active
);
1152 bond_set_slave_active_flags(new_active
);
1154 bond
->curr_active_slave
= new_active
;
1157 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1159 bond_set_slave_inactive_flags(old_active
);
1162 bond_set_slave_active_flags(new_active
);
1164 if (bond
->params
.fail_over_mac
)
1165 bond_do_fail_over_mac(bond
, new_active
,
1168 if (netif_running(bond
->dev
)) {
1169 bond
->send_grat_arp
= bond
->params
.num_grat_arp
;
1170 bond_send_gratuitous_arp(bond
);
1172 bond
->send_unsol_na
= bond
->params
.num_unsol_na
;
1173 bond_send_unsolicited_na(bond
);
1176 write_unlock_bh(&bond
->curr_slave_lock
);
1177 read_unlock(&bond
->lock
);
1179 netdev_bonding_change(bond
->dev
, NETDEV_BONDING_FAILOVER
);
1181 read_lock(&bond
->lock
);
1182 write_lock_bh(&bond
->curr_slave_lock
);
1186 /* resend IGMP joins since active slave has changed or
1187 * all were sent on curr_active_slave */
1188 if (((USES_PRIMARY(bond
->params
.mode
) && new_active
) ||
1189 bond
->params
.mode
== BOND_MODE_ROUNDROBIN
) &&
1190 netif_running(bond
->dev
)) {
1191 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
1192 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 0);
1197 * bond_select_active_slave - select a new active slave, if needed
1198 * @bond: our bonding struct
1200 * This functions should be called when one of the following occurs:
1201 * - The old curr_active_slave has been released or lost its link.
1202 * - The primary_slave has got its link back.
1203 * - A slave has got its link back and there's no old curr_active_slave.
1205 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1207 void bond_select_active_slave(struct bonding
*bond
)
1209 struct slave
*best_slave
;
1212 best_slave
= bond_find_best_slave(bond
);
1213 if (best_slave
!= bond
->curr_active_slave
) {
1214 bond_change_active_slave(bond
, best_slave
);
1215 rv
= bond_set_carrier(bond
);
1219 if (netif_carrier_ok(bond
->dev
)) {
1220 pr_info("%s: first active interface up!\n",
1223 pr_info("%s: now running without any active interface !\n",
1229 /*--------------------------- slave list handling ---------------------------*/
1232 * This function attaches the slave to the end of list.
1234 * bond->lock held for writing by caller.
1236 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1238 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1239 new_slave
->next
= new_slave
;
1240 new_slave
->prev
= new_slave
;
1241 bond
->first_slave
= new_slave
;
1243 new_slave
->next
= bond
->first_slave
;
1244 new_slave
->prev
= bond
->first_slave
->prev
;
1245 new_slave
->next
->prev
= new_slave
;
1246 new_slave
->prev
->next
= new_slave
;
1253 * This function detaches the slave from the list.
1254 * WARNING: no check is made to verify if the slave effectively
1255 * belongs to <bond>.
1256 * Nothing is freed on return, structures are just unchained.
1257 * If any slave pointer in bond was pointing to <slave>,
1258 * it should be changed by the calling function.
1260 * bond->lock held for writing by caller.
1262 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1265 slave
->next
->prev
= slave
->prev
;
1268 slave
->prev
->next
= slave
->next
;
1270 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1271 if (bond
->slave_cnt
> 1) { /* there are more slave */
1272 bond
->first_slave
= slave
->next
;
1274 bond
->first_slave
= NULL
; /* slave was the last one */
1283 #ifdef CONFIG_NET_POLL_CONTROLLER
1284 static inline int slave_enable_netpoll(struct slave
*slave
)
1289 np
= kzalloc(sizeof(*np
), GFP_KERNEL
);
1294 np
->dev
= slave
->dev
;
1295 err
= __netpoll_setup(np
);
1304 static inline void slave_disable_netpoll(struct slave
*slave
)
1306 struct netpoll
*np
= slave
->np
;
1312 synchronize_rcu_bh();
1313 __netpoll_cleanup(np
);
1316 static inline bool slave_dev_support_netpoll(struct net_device
*slave_dev
)
1318 if (slave_dev
->priv_flags
& IFF_DISABLE_NETPOLL
)
1320 if (!slave_dev
->netdev_ops
->ndo_poll_controller
)
1325 static void bond_poll_controller(struct net_device
*bond_dev
)
1329 static void __bond_netpoll_cleanup(struct bonding
*bond
)
1331 struct slave
*slave
;
1334 bond_for_each_slave(bond
, slave
, i
)
1335 if (IS_UP(slave
->dev
))
1336 slave_disable_netpoll(slave
);
1338 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1340 struct bonding
*bond
= netdev_priv(bond_dev
);
1342 read_lock(&bond
->lock
);
1343 __bond_netpoll_cleanup(bond
);
1344 read_unlock(&bond
->lock
);
1347 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
)
1349 struct bonding
*bond
= netdev_priv(dev
);
1350 struct slave
*slave
;
1353 read_lock(&bond
->lock
);
1354 bond_for_each_slave(bond
, slave
, i
) {
1355 if (!IS_UP(slave
->dev
))
1357 err
= slave_enable_netpoll(slave
);
1359 __bond_netpoll_cleanup(bond
);
1363 read_unlock(&bond
->lock
);
1367 static struct netpoll_info
*bond_netpoll_info(struct bonding
*bond
)
1369 return bond
->dev
->npinfo
;
1373 static inline int slave_enable_netpoll(struct slave
*slave
)
1377 static inline void slave_disable_netpoll(struct slave
*slave
)
1380 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1383 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
)
1387 static struct netpoll_info
*bond_netpoll_info(struct bonding
*bond
)
1393 /*---------------------------------- IOCTL ----------------------------------*/
1395 static int bond_sethwaddr(struct net_device
*bond_dev
,
1396 struct net_device
*slave_dev
)
1398 pr_debug("bond_dev=%p\n", bond_dev
);
1399 pr_debug("slave_dev=%p\n", slave_dev
);
1400 pr_debug("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1401 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1405 #define BOND_VLAN_FEATURES \
1406 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1407 NETIF_F_HW_VLAN_FILTER)
1410 * Compute the common dev->feature set available to all slaves. Some
1411 * feature bits are managed elsewhere, so preserve those feature bits
1412 * on the master device.
1414 static int bond_compute_features(struct bonding
*bond
)
1416 struct slave
*slave
;
1417 struct net_device
*bond_dev
= bond
->dev
;
1418 u32 features
= bond_dev
->features
;
1419 u32 vlan_features
= 0;
1420 unsigned short max_hard_header_len
= max((u16
)ETH_HLEN
,
1421 bond_dev
->hard_header_len
);
1424 features
&= ~(NETIF_F_ALL_CSUM
| BOND_VLAN_FEATURES
);
1425 features
|= NETIF_F_GSO_MASK
| NETIF_F_NO_CSUM
;
1427 if (!bond
->first_slave
)
1430 features
&= ~NETIF_F_ONE_FOR_ALL
;
1432 vlan_features
= bond
->first_slave
->dev
->vlan_features
;
1433 bond_for_each_slave(bond
, slave
, i
) {
1434 features
= netdev_increment_features(features
,
1435 slave
->dev
->features
,
1436 NETIF_F_ONE_FOR_ALL
);
1437 vlan_features
= netdev_increment_features(vlan_features
,
1438 slave
->dev
->vlan_features
,
1439 NETIF_F_ONE_FOR_ALL
);
1440 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1441 max_hard_header_len
= slave
->dev
->hard_header_len
;
1445 features
|= (bond_dev
->features
& BOND_VLAN_FEATURES
);
1446 bond_dev
->features
= netdev_fix_features(bond_dev
, features
);
1447 bond_dev
->vlan_features
= netdev_fix_features(bond_dev
, vlan_features
);
1448 bond_dev
->hard_header_len
= max_hard_header_len
;
1453 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1454 struct net_device
*slave_dev
)
1456 struct bonding
*bond
= netdev_priv(bond_dev
);
1458 bond_dev
->header_ops
= slave_dev
->header_ops
;
1460 bond_dev
->type
= slave_dev
->type
;
1461 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1462 bond_dev
->addr_len
= slave_dev
->addr_len
;
1464 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1465 slave_dev
->addr_len
);
1466 bond
->setup_by_slave
= 1;
1469 /* On bonding slaves other than the currently active slave, suppress
1470 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1471 * ARP on active-backup slaves with arp_validate enabled.
1473 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1474 struct net_device
*slave_dev
,
1475 struct net_device
*bond_dev
)
1477 if (slave_dev
->priv_flags
& IFF_SLAVE_INACTIVE
) {
1478 if (slave_dev
->priv_flags
& IFF_SLAVE_NEEDARP
&&
1479 skb
->protocol
== __cpu_to_be16(ETH_P_ARP
))
1482 if (bond_dev
->priv_flags
& IFF_MASTER_ALB
&&
1483 skb
->pkt_type
!= PACKET_BROADCAST
&&
1484 skb
->pkt_type
!= PACKET_MULTICAST
)
1487 if (bond_dev
->priv_flags
& IFF_MASTER_8023AD
&&
1488 skb
->protocol
== __cpu_to_be16(ETH_P_SLOW
))
1496 static struct sk_buff
*bond_handle_frame(struct sk_buff
*skb
)
1498 struct net_device
*slave_dev
;
1499 struct net_device
*bond_dev
;
1501 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1504 slave_dev
= skb
->dev
;
1505 bond_dev
= ACCESS_ONCE(slave_dev
->master
);
1506 if (unlikely(!bond_dev
))
1509 if (bond_dev
->priv_flags
& IFF_MASTER_ARPMON
)
1510 slave_dev
->last_rx
= jiffies
;
1512 if (bond_should_deliver_exact_match(skb
, slave_dev
, bond_dev
)) {
1513 skb
->deliver_no_wcard
= 1;
1517 skb
->dev
= bond_dev
;
1519 if (bond_dev
->priv_flags
& IFF_MASTER_ALB
&&
1520 bond_dev
->priv_flags
& IFF_BRIDGE_PORT
&&
1521 skb
->pkt_type
== PACKET_HOST
) {
1522 u16
*dest
= (u16
*) eth_hdr(skb
)->h_dest
;
1524 memcpy(dest
, bond_dev
->dev_addr
, ETH_ALEN
);
1530 /* enslave device <slave> to bond device <master> */
1531 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1533 struct bonding
*bond
= netdev_priv(bond_dev
);
1534 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1535 struct slave
*new_slave
= NULL
;
1536 struct netdev_hw_addr
*ha
;
1537 struct sockaddr addr
;
1539 int old_features
= bond_dev
->features
;
1542 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1543 slave_ops
->ndo_do_ioctl
== NULL
) {
1544 pr_warning("%s: Warning: no link monitoring support for %s\n",
1545 bond_dev
->name
, slave_dev
->name
);
1548 /* bond must be initialized by bond_open() before enslaving */
1549 if (!(bond_dev
->flags
& IFF_UP
)) {
1550 pr_warning("%s: master_dev is not up in bond_enslave\n",
1554 /* already enslaved */
1555 if (slave_dev
->flags
& IFF_SLAVE
) {
1556 pr_debug("Error, Device was already enslaved\n");
1560 /* vlan challenged mutual exclusion */
1561 /* no need to lock since we're protected by rtnl_lock */
1562 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1563 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1565 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1566 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1569 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1570 bond_dev
->name
, slave_dev
->name
,
1571 slave_dev
->name
, bond_dev
->name
);
1572 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1575 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1576 if (bond
->slave_cnt
== 0) {
1577 /* First slave, and it is not VLAN challenged,
1578 * so remove the block of adding VLANs over the bond.
1580 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1585 * Old ifenslave binaries are no longer supported. These can
1586 * be identified with moderate accuracy by the state of the slave:
1587 * the current ifenslave will set the interface down prior to
1588 * enslaving it; the old ifenslave will not.
1590 if ((slave_dev
->flags
& IFF_UP
)) {
1591 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1594 goto err_undo_flags
;
1597 /* set bonding device ether type by slave - bonding netdevices are
1598 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1599 * there is a need to override some of the type dependent attribs/funcs.
1601 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1602 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1604 if (bond
->slave_cnt
== 0) {
1605 if (bond_dev
->type
!= slave_dev
->type
) {
1606 pr_debug("%s: change device type from %d to %d\n",
1608 bond_dev
->type
, slave_dev
->type
);
1610 res
= netdev_bonding_change(bond_dev
,
1611 NETDEV_PRE_TYPE_CHANGE
);
1612 res
= notifier_to_errno(res
);
1614 pr_err("%s: refused to change device type\n",
1617 goto err_undo_flags
;
1620 /* Flush unicast and multicast addresses */
1621 dev_uc_flush(bond_dev
);
1622 dev_mc_flush(bond_dev
);
1624 if (slave_dev
->type
!= ARPHRD_ETHER
)
1625 bond_setup_by_slave(bond_dev
, slave_dev
);
1627 ether_setup(bond_dev
);
1629 netdev_bonding_change(bond_dev
,
1630 NETDEV_POST_TYPE_CHANGE
);
1632 } else if (bond_dev
->type
!= slave_dev
->type
) {
1633 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1635 slave_dev
->type
, bond_dev
->type
);
1637 goto err_undo_flags
;
1640 if (slave_ops
->ndo_set_mac_address
== NULL
) {
1641 if (bond
->slave_cnt
== 0) {
1642 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1644 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1645 } else if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1646 pr_err("%s: Error: The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active.\n",
1649 goto err_undo_flags
;
1653 /* If this is the first slave, then we need to set the master's hardware
1654 * address to be the same as the slave's. */
1655 if (is_zero_ether_addr(bond
->dev
->dev_addr
))
1656 memcpy(bond
->dev
->dev_addr
, slave_dev
->dev_addr
,
1657 slave_dev
->addr_len
);
1660 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1663 goto err_undo_flags
;
1667 * Set the new_slave's queue_id to be zero. Queue ID mapping
1668 * is set via sysfs or module option if desired.
1670 new_slave
->queue_id
= 0;
1672 /* Save slave's original mtu and then set it to match the bond */
1673 new_slave
->original_mtu
= slave_dev
->mtu
;
1674 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1676 pr_debug("Error %d calling dev_set_mtu\n", res
);
1681 * Save slave's original ("permanent") mac address for modes
1682 * that need it, and for restoring it upon release, and then
1683 * set it to the master's address
1685 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1687 if (!bond
->params
.fail_over_mac
) {
1689 * Set slave to master's mac address. The application already
1690 * set the master's mac address to that of the first slave
1692 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1693 addr
.sa_family
= slave_dev
->type
;
1694 res
= dev_set_mac_address(slave_dev
, &addr
);
1696 pr_debug("Error %d calling set_mac_address\n", res
);
1697 goto err_restore_mtu
;
1701 res
= netdev_set_bond_master(slave_dev
, bond_dev
);
1703 pr_debug("Error %d calling netdev_set_bond_master\n", res
);
1704 goto err_restore_mac
;
1706 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
, NULL
);
1708 pr_debug("Error %d calling netdev_rx_handler_register\n", res
);
1709 goto err_unset_master
;
1712 /* open the slave since the application closed it */
1713 res
= dev_open(slave_dev
);
1715 pr_debug("Opening slave %s failed\n", slave_dev
->name
);
1716 goto err_unreg_rxhandler
;
1719 new_slave
->dev
= slave_dev
;
1720 slave_dev
->priv_flags
|= IFF_BONDING
;
1722 if (bond_is_lb(bond
)) {
1723 /* bond_alb_init_slave() must be called before all other stages since
1724 * it might fail and we do not want to have to undo everything
1726 res
= bond_alb_init_slave(bond
, new_slave
);
1731 /* If the mode USES_PRIMARY, then the new slave gets the
1732 * master's promisc (and mc) settings only if it becomes the
1733 * curr_active_slave, and that is taken care of later when calling
1734 * bond_change_active()
1736 if (!USES_PRIMARY(bond
->params
.mode
)) {
1737 /* set promiscuity level to new slave */
1738 if (bond_dev
->flags
& IFF_PROMISC
) {
1739 res
= dev_set_promiscuity(slave_dev
, 1);
1744 /* set allmulti level to new slave */
1745 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1746 res
= dev_set_allmulti(slave_dev
, 1);
1751 netif_addr_lock_bh(bond_dev
);
1752 /* upload master's mc_list to new slave */
1753 netdev_for_each_mc_addr(ha
, bond_dev
)
1754 dev_mc_add(slave_dev
, ha
->addr
);
1755 netif_addr_unlock_bh(bond_dev
);
1758 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1759 /* add lacpdu mc addr to mc list */
1760 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1762 dev_mc_add(slave_dev
, lacpdu_multicast
);
1765 bond_add_vlans_on_slave(bond
, slave_dev
);
1767 write_lock_bh(&bond
->lock
);
1769 bond_attach_slave(bond
, new_slave
);
1771 new_slave
->delay
= 0;
1772 new_slave
->link_failure_count
= 0;
1774 bond_compute_features(bond
);
1776 write_unlock_bh(&bond
->lock
);
1778 read_lock(&bond
->lock
);
1780 new_slave
->last_arp_rx
= jiffies
;
1782 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1783 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1785 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1787 * miimon is set but a bonded network driver
1788 * does not support ETHTOOL/MII and
1789 * arp_interval is not set. Note: if
1790 * use_carrier is enabled, we will never go
1791 * here (because netif_carrier is always
1792 * supported); thus, we don't need to change
1793 * the messages for netif_carrier.
1795 pr_warning("%s: Warning: MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details.\n",
1796 bond_dev
->name
, slave_dev
->name
);
1797 } else if (link_reporting
== -1) {
1798 /* unable get link status using mii/ethtool */
1799 pr_warning("%s: Warning: can't get link status from interface %s; the network driver associated with this interface does not support MII or ETHTOOL link status reporting, thus miimon has no effect on this interface.\n",
1800 bond_dev
->name
, slave_dev
->name
);
1804 /* check for initial state */
1805 if (!bond
->params
.miimon
||
1806 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1807 if (bond
->params
.updelay
) {
1808 pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n");
1809 new_slave
->link
= BOND_LINK_BACK
;
1810 new_slave
->delay
= bond
->params
.updelay
;
1812 pr_debug("Initial state of slave_dev is BOND_LINK_UP\n");
1813 new_slave
->link
= BOND_LINK_UP
;
1815 new_slave
->jiffies
= jiffies
;
1817 pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n");
1818 new_slave
->link
= BOND_LINK_DOWN
;
1821 if (bond_update_speed_duplex(new_slave
) &&
1822 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1823 pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n",
1824 bond_dev
->name
, new_slave
->dev
->name
);
1826 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1827 pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n",
1832 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1833 /* if there is a primary slave, remember it */
1834 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1835 bond
->primary_slave
= new_slave
;
1836 bond
->force_primary
= true;
1840 write_lock_bh(&bond
->curr_slave_lock
);
1842 switch (bond
->params
.mode
) {
1843 case BOND_MODE_ACTIVEBACKUP
:
1844 bond_set_slave_inactive_flags(new_slave
);
1845 bond_select_active_slave(bond
);
1847 case BOND_MODE_8023AD
:
1848 /* in 802.3ad mode, the internal mechanism
1849 * will activate the slaves in the selected
1852 bond_set_slave_inactive_flags(new_slave
);
1853 /* if this is the first slave */
1854 if (bond
->slave_cnt
== 1) {
1855 SLAVE_AD_INFO(new_slave
).id
= 1;
1856 /* Initialize AD with the number of times that the AD timer is called in 1 second
1857 * can be called only after the mac address of the bond is set
1859 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
,
1860 bond
->params
.lacp_fast
);
1862 SLAVE_AD_INFO(new_slave
).id
=
1863 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1866 bond_3ad_bind_slave(new_slave
);
1870 new_slave
->state
= BOND_STATE_ACTIVE
;
1871 bond_set_slave_inactive_flags(new_slave
);
1872 bond_select_active_slave(bond
);
1875 pr_debug("This slave is always active in trunk mode\n");
1877 /* always active in trunk mode */
1878 new_slave
->state
= BOND_STATE_ACTIVE
;
1880 /* In trunking mode there is little meaning to curr_active_slave
1881 * anyway (it holds no special properties of the bond device),
1882 * so we can change it without calling change_active_interface()
1884 if (!bond
->curr_active_slave
)
1885 bond
->curr_active_slave
= new_slave
;
1888 } /* switch(bond_mode) */
1890 write_unlock_bh(&bond
->curr_slave_lock
);
1892 bond_set_carrier(bond
);
1894 #ifdef CONFIG_NET_POLL_CONTROLLER
1895 slave_dev
->npinfo
= bond_netpoll_info(bond
);
1896 if (slave_dev
->npinfo
) {
1897 if (slave_enable_netpoll(new_slave
)) {
1898 read_unlock(&bond
->lock
);
1899 pr_info("Error, %s: master_dev is using netpoll, "
1900 "but new slave device does not support netpoll.\n",
1908 read_unlock(&bond
->lock
);
1910 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1914 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1915 bond_dev
->name
, slave_dev
->name
,
1916 new_slave
->state
== BOND_STATE_ACTIVE
? "n active" : " backup",
1917 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1919 /* enslave is successful */
1922 /* Undo stages on error */
1924 dev_close(slave_dev
);
1926 err_unreg_rxhandler
:
1927 netdev_rx_handler_unregister(slave_dev
);
1930 netdev_set_bond_master(slave_dev
, NULL
);
1933 if (!bond
->params
.fail_over_mac
) {
1934 /* XXX TODO - fom follow mode needs to change master's
1935 * MAC if this slave's MAC is in use by the bond, or at
1936 * least print a warning.
1938 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1939 addr
.sa_family
= slave_dev
->type
;
1940 dev_set_mac_address(slave_dev
, &addr
);
1944 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1950 bond_dev
->features
= old_features
;
1956 * Try to release the slave device <slave> from the bond device <master>
1957 * It is legal to access curr_active_slave without a lock because all the function
1960 * The rules for slave state should be:
1961 * for Active/Backup:
1962 * Active stays on all backups go down
1963 * for Bonded connections:
1964 * The first up interface should be left on and all others downed.
1966 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1968 struct bonding
*bond
= netdev_priv(bond_dev
);
1969 struct slave
*slave
, *oldcurrent
;
1970 struct sockaddr addr
;
1972 /* slave is not a slave or master is not master of this slave */
1973 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1974 (slave_dev
->master
!= bond_dev
)) {
1975 pr_err("%s: Error: cannot release %s.\n",
1976 bond_dev
->name
, slave_dev
->name
);
1981 netdev_bonding_change(bond_dev
, NETDEV_BONDING_DESLAVE
);
1982 write_lock_bh(&bond
->lock
);
1984 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1986 /* not a slave of this bond */
1987 pr_info("%s: %s not enslaved\n",
1988 bond_dev
->name
, slave_dev
->name
);
1989 write_unlock_bh(&bond
->lock
);
1990 unblock_netpoll_tx();
1994 if (!bond
->params
.fail_over_mac
) {
1995 if (!compare_ether_addr(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1996 bond
->slave_cnt
> 1)
1997 pr_warning("%s: Warning: the permanent HWaddr of %s - %pM - is still in use by %s. Set the HWaddr of %s to a different address to avoid conflicts.\n",
1998 bond_dev
->name
, slave_dev
->name
,
2000 bond_dev
->name
, slave_dev
->name
);
2003 /* Inform AD package of unbinding of slave. */
2004 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2005 /* must be called before the slave is
2006 * detached from the list
2008 bond_3ad_unbind_slave(slave
);
2011 pr_info("%s: releasing %s interface %s\n",
2013 (slave
->state
== BOND_STATE_ACTIVE
) ? "active" : "backup",
2016 oldcurrent
= bond
->curr_active_slave
;
2018 bond
->current_arp_slave
= NULL
;
2020 /* release the slave from its bond */
2021 bond_detach_slave(bond
, slave
);
2023 bond_compute_features(bond
);
2025 if (bond
->primary_slave
== slave
)
2026 bond
->primary_slave
= NULL
;
2028 if (oldcurrent
== slave
)
2029 bond_change_active_slave(bond
, NULL
);
2031 if (bond_is_lb(bond
)) {
2032 /* Must be called only after the slave has been
2033 * detached from the list and the curr_active_slave
2034 * has been cleared (if our_slave == old_current),
2035 * but before a new active slave is selected.
2037 write_unlock_bh(&bond
->lock
);
2038 bond_alb_deinit_slave(bond
, slave
);
2039 write_lock_bh(&bond
->lock
);
2042 if (oldcurrent
== slave
) {
2044 * Note that we hold RTNL over this sequence, so there
2045 * is no concern that another slave add/remove event
2048 write_unlock_bh(&bond
->lock
);
2049 read_lock(&bond
->lock
);
2050 write_lock_bh(&bond
->curr_slave_lock
);
2052 bond_select_active_slave(bond
);
2054 write_unlock_bh(&bond
->curr_slave_lock
);
2055 read_unlock(&bond
->lock
);
2056 write_lock_bh(&bond
->lock
);
2059 if (bond
->slave_cnt
== 0) {
2060 bond_set_carrier(bond
);
2062 /* if the last slave was removed, zero the mac address
2063 * of the master so it will be set by the application
2064 * to the mac address of the first slave
2066 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2069 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
2071 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2072 bond_dev
->name
, bond_dev
->name
);
2073 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2076 } else if ((bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
2077 !bond_has_challenged_slaves(bond
)) {
2078 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
2079 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
2080 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
2083 write_unlock_bh(&bond
->lock
);
2084 unblock_netpoll_tx();
2086 /* must do this from outside any spinlocks */
2087 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2089 bond_del_vlans_from_slave(bond
, slave_dev
);
2091 /* If the mode USES_PRIMARY, then we should only remove its
2092 * promisc and mc settings if it was the curr_active_slave, but that was
2093 * already taken care of above when we detached the slave
2095 if (!USES_PRIMARY(bond
->params
.mode
)) {
2096 /* unset promiscuity level from slave */
2097 if (bond_dev
->flags
& IFF_PROMISC
)
2098 dev_set_promiscuity(slave_dev
, -1);
2100 /* unset allmulti level from slave */
2101 if (bond_dev
->flags
& IFF_ALLMULTI
)
2102 dev_set_allmulti(slave_dev
, -1);
2104 /* flush master's mc_list from slave */
2105 netif_addr_lock_bh(bond_dev
);
2106 bond_mc_list_flush(bond_dev
, slave_dev
);
2107 netif_addr_unlock_bh(bond_dev
);
2110 netdev_rx_handler_unregister(slave_dev
);
2111 netdev_set_bond_master(slave_dev
, NULL
);
2113 slave_disable_netpoll(slave
);
2115 /* close slave before restoring its mac address */
2116 dev_close(slave_dev
);
2118 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
2119 /* restore original ("permanent") mac address */
2120 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2121 addr
.sa_family
= slave_dev
->type
;
2122 dev_set_mac_address(slave_dev
, &addr
);
2125 dev_set_mtu(slave_dev
, slave
->original_mtu
);
2127 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
2128 IFF_SLAVE_INACTIVE
| IFF_BONDING
|
2133 return 0; /* deletion OK */
2137 * First release a slave and than destroy the bond if no more slaves are left.
2138 * Must be under rtnl_lock when this function is called.
2140 static int bond_release_and_destroy(struct net_device
*bond_dev
,
2141 struct net_device
*slave_dev
)
2143 struct bonding
*bond
= netdev_priv(bond_dev
);
2146 ret
= bond_release(bond_dev
, slave_dev
);
2147 if ((ret
== 0) && (bond
->slave_cnt
== 0)) {
2148 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
2149 pr_info("%s: destroying bond %s.\n",
2150 bond_dev
->name
, bond_dev
->name
);
2151 unregister_netdevice(bond_dev
);
2157 * This function releases all slaves.
2159 static int bond_release_all(struct net_device
*bond_dev
)
2161 struct bonding
*bond
= netdev_priv(bond_dev
);
2162 struct slave
*slave
;
2163 struct net_device
*slave_dev
;
2164 struct sockaddr addr
;
2166 write_lock_bh(&bond
->lock
);
2168 netif_carrier_off(bond_dev
);
2170 if (bond
->slave_cnt
== 0)
2173 bond
->current_arp_slave
= NULL
;
2174 bond
->primary_slave
= NULL
;
2175 bond_change_active_slave(bond
, NULL
);
2177 while ((slave
= bond
->first_slave
) != NULL
) {
2178 /* Inform AD package of unbinding of slave
2179 * before slave is detached from the list.
2181 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2182 bond_3ad_unbind_slave(slave
);
2184 slave_dev
= slave
->dev
;
2185 bond_detach_slave(bond
, slave
);
2187 /* now that the slave is detached, unlock and perform
2188 * all the undo steps that should not be called from
2191 write_unlock_bh(&bond
->lock
);
2193 if (bond_is_lb(bond
)) {
2194 /* must be called only after the slave
2195 * has been detached from the list
2197 bond_alb_deinit_slave(bond
, slave
);
2200 bond_compute_features(bond
);
2202 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2203 bond_del_vlans_from_slave(bond
, slave_dev
);
2205 /* If the mode USES_PRIMARY, then we should only remove its
2206 * promisc and mc settings if it was the curr_active_slave, but that was
2207 * already taken care of above when we detached the slave
2209 if (!USES_PRIMARY(bond
->params
.mode
)) {
2210 /* unset promiscuity level from slave */
2211 if (bond_dev
->flags
& IFF_PROMISC
)
2212 dev_set_promiscuity(slave_dev
, -1);
2214 /* unset allmulti level from slave */
2215 if (bond_dev
->flags
& IFF_ALLMULTI
)
2216 dev_set_allmulti(slave_dev
, -1);
2218 /* flush master's mc_list from slave */
2219 netif_addr_lock_bh(bond_dev
);
2220 bond_mc_list_flush(bond_dev
, slave_dev
);
2221 netif_addr_unlock_bh(bond_dev
);
2224 netdev_rx_handler_unregister(slave_dev
);
2225 netdev_set_bond_master(slave_dev
, NULL
);
2227 slave_disable_netpoll(slave
);
2229 /* close slave before restoring its mac address */
2230 dev_close(slave_dev
);
2232 if (!bond
->params
.fail_over_mac
) {
2233 /* restore original ("permanent") mac address*/
2234 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2235 addr
.sa_family
= slave_dev
->type
;
2236 dev_set_mac_address(slave_dev
, &addr
);
2239 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
2240 IFF_SLAVE_INACTIVE
);
2244 /* re-acquire the lock before getting the next slave */
2245 write_lock_bh(&bond
->lock
);
2248 /* zero the mac address of the master so it will be
2249 * set by the application to the mac address of the
2252 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2255 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
2257 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2258 bond_dev
->name
, bond_dev
->name
);
2259 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2263 pr_info("%s: released all slaves\n", bond_dev
->name
);
2266 write_unlock_bh(&bond
->lock
);
2271 * This function changes the active slave to slave <slave_dev>.
2272 * It returns -EINVAL in the following cases.
2273 * - <slave_dev> is not found in the list.
2274 * - There is not active slave now.
2275 * - <slave_dev> is already active.
2276 * - The link state of <slave_dev> is not BOND_LINK_UP.
2277 * - <slave_dev> is not running.
2278 * In these cases, this function does nothing.
2279 * In the other cases, current_slave pointer is changed and 0 is returned.
2281 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2283 struct bonding
*bond
= netdev_priv(bond_dev
);
2284 struct slave
*old_active
= NULL
;
2285 struct slave
*new_active
= NULL
;
2288 if (!USES_PRIMARY(bond
->params
.mode
))
2291 /* Verify that master_dev is indeed the master of slave_dev */
2292 if (!(slave_dev
->flags
& IFF_SLAVE
) || (slave_dev
->master
!= bond_dev
))
2295 read_lock(&bond
->lock
);
2297 read_lock(&bond
->curr_slave_lock
);
2298 old_active
= bond
->curr_active_slave
;
2299 read_unlock(&bond
->curr_slave_lock
);
2301 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
2304 * Changing to the current active: do nothing; return success.
2306 if (new_active
&& (new_active
== old_active
)) {
2307 read_unlock(&bond
->lock
);
2313 (new_active
->link
== BOND_LINK_UP
) &&
2314 IS_UP(new_active
->dev
)) {
2316 write_lock_bh(&bond
->curr_slave_lock
);
2317 bond_change_active_slave(bond
, new_active
);
2318 write_unlock_bh(&bond
->curr_slave_lock
);
2319 unblock_netpoll_tx();
2323 read_unlock(&bond
->lock
);
2328 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2330 struct bonding
*bond
= netdev_priv(bond_dev
);
2332 info
->bond_mode
= bond
->params
.mode
;
2333 info
->miimon
= bond
->params
.miimon
;
2335 read_lock(&bond
->lock
);
2336 info
->num_slaves
= bond
->slave_cnt
;
2337 read_unlock(&bond
->lock
);
2342 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2344 struct bonding
*bond
= netdev_priv(bond_dev
);
2345 struct slave
*slave
;
2346 int i
, res
= -ENODEV
;
2348 read_lock(&bond
->lock
);
2350 bond_for_each_slave(bond
, slave
, i
) {
2351 if (i
== (int)info
->slave_id
) {
2353 strcpy(info
->slave_name
, slave
->dev
->name
);
2354 info
->link
= slave
->link
;
2355 info
->state
= slave
->state
;
2356 info
->link_failure_count
= slave
->link_failure_count
;
2361 read_unlock(&bond
->lock
);
2366 /*-------------------------------- Monitoring -------------------------------*/
2369 static int bond_miimon_inspect(struct bonding
*bond
)
2371 struct slave
*slave
;
2372 int i
, link_state
, commit
= 0;
2373 bool ignore_updelay
;
2375 ignore_updelay
= !bond
->curr_active_slave
? true : false;
2377 bond_for_each_slave(bond
, slave
, i
) {
2378 slave
->new_link
= BOND_LINK_NOCHANGE
;
2380 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
2382 switch (slave
->link
) {
2387 slave
->link
= BOND_LINK_FAIL
;
2388 slave
->delay
= bond
->params
.downdelay
;
2390 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2392 (bond
->params
.mode
==
2393 BOND_MODE_ACTIVEBACKUP
) ?
2394 ((slave
->state
== BOND_STATE_ACTIVE
) ?
2395 "active " : "backup ") : "",
2397 bond
->params
.downdelay
* bond
->params
.miimon
);
2400 case BOND_LINK_FAIL
:
2403 * recovered before downdelay expired
2405 slave
->link
= BOND_LINK_UP
;
2406 slave
->jiffies
= jiffies
;
2407 pr_info("%s: link status up again after %d ms for interface %s.\n",
2409 (bond
->params
.downdelay
- slave
->delay
) *
2410 bond
->params
.miimon
,
2415 if (slave
->delay
<= 0) {
2416 slave
->new_link
= BOND_LINK_DOWN
;
2424 case BOND_LINK_DOWN
:
2428 slave
->link
= BOND_LINK_BACK
;
2429 slave
->delay
= bond
->params
.updelay
;
2432 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2433 bond
->dev
->name
, slave
->dev
->name
,
2434 ignore_updelay
? 0 :
2435 bond
->params
.updelay
*
2436 bond
->params
.miimon
);
2439 case BOND_LINK_BACK
:
2441 slave
->link
= BOND_LINK_DOWN
;
2442 pr_info("%s: link status down again after %d ms for interface %s.\n",
2444 (bond
->params
.updelay
- slave
->delay
) *
2445 bond
->params
.miimon
,
2454 if (slave
->delay
<= 0) {
2455 slave
->new_link
= BOND_LINK_UP
;
2457 ignore_updelay
= false;
2469 static void bond_miimon_commit(struct bonding
*bond
)
2471 struct slave
*slave
;
2474 bond_for_each_slave(bond
, slave
, i
) {
2475 switch (slave
->new_link
) {
2476 case BOND_LINK_NOCHANGE
:
2480 slave
->link
= BOND_LINK_UP
;
2481 slave
->jiffies
= jiffies
;
2483 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2484 /* prevent it from being the active one */
2485 slave
->state
= BOND_STATE_BACKUP
;
2486 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2487 /* make it immediately active */
2488 slave
->state
= BOND_STATE_ACTIVE
;
2489 } else if (slave
!= bond
->primary_slave
) {
2490 /* prevent it from being the active one */
2491 slave
->state
= BOND_STATE_BACKUP
;
2494 bond_update_speed_duplex(slave
);
2496 pr_info("%s: link status definitely up for interface %s, %d Mbps %s duplex.\n",
2497 bond
->dev
->name
, slave
->dev
->name
,
2498 slave
->speed
, slave
->duplex
? "full" : "half");
2500 /* notify ad that the link status has changed */
2501 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2502 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2504 if (bond_is_lb(bond
))
2505 bond_alb_handle_link_change(bond
, slave
,
2508 if (!bond
->curr_active_slave
||
2509 (slave
== bond
->primary_slave
))
2514 case BOND_LINK_DOWN
:
2515 if (slave
->link_failure_count
< UINT_MAX
)
2516 slave
->link_failure_count
++;
2518 slave
->link
= BOND_LINK_DOWN
;
2520 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
||
2521 bond
->params
.mode
== BOND_MODE_8023AD
)
2522 bond_set_slave_inactive_flags(slave
);
2524 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2525 bond
->dev
->name
, slave
->dev
->name
);
2527 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2528 bond_3ad_handle_link_change(slave
,
2531 if (bond_is_lb(bond
))
2532 bond_alb_handle_link_change(bond
, slave
,
2535 if (slave
== bond
->curr_active_slave
)
2541 pr_err("%s: invalid new link %d on slave %s\n",
2542 bond
->dev
->name
, slave
->new_link
,
2544 slave
->new_link
= BOND_LINK_NOCHANGE
;
2552 write_lock_bh(&bond
->curr_slave_lock
);
2553 bond_select_active_slave(bond
);
2554 write_unlock_bh(&bond
->curr_slave_lock
);
2555 unblock_netpoll_tx();
2558 bond_set_carrier(bond
);
2564 * Really a wrapper that splits the mii monitor into two phases: an
2565 * inspection, then (if inspection indicates something needs to be done)
2566 * an acquisition of appropriate locks followed by a commit phase to
2567 * implement whatever link state changes are indicated.
2569 void bond_mii_monitor(struct work_struct
*work
)
2571 struct bonding
*bond
= container_of(work
, struct bonding
,
2574 read_lock(&bond
->lock
);
2575 if (bond
->kill_timers
)
2578 if (bond
->slave_cnt
== 0)
2581 if (bond
->send_grat_arp
) {
2582 read_lock(&bond
->curr_slave_lock
);
2583 bond_send_gratuitous_arp(bond
);
2584 read_unlock(&bond
->curr_slave_lock
);
2587 if (bond
->send_unsol_na
) {
2588 read_lock(&bond
->curr_slave_lock
);
2589 bond_send_unsolicited_na(bond
);
2590 read_unlock(&bond
->curr_slave_lock
);
2593 if (bond_miimon_inspect(bond
)) {
2594 read_unlock(&bond
->lock
);
2596 read_lock(&bond
->lock
);
2598 bond_miimon_commit(bond
);
2600 read_unlock(&bond
->lock
);
2601 rtnl_unlock(); /* might sleep, hold no other locks */
2602 read_lock(&bond
->lock
);
2606 if (bond
->params
.miimon
)
2607 queue_delayed_work(bond
->wq
, &bond
->mii_work
,
2608 msecs_to_jiffies(bond
->params
.miimon
));
2610 read_unlock(&bond
->lock
);
2613 static __be32
bond_glean_dev_ip(struct net_device
*dev
)
2615 struct in_device
*idev
;
2616 struct in_ifaddr
*ifa
;
2623 idev
= __in_dev_get_rcu(dev
);
2627 ifa
= idev
->ifa_list
;
2631 addr
= ifa
->ifa_local
;
2637 static int bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2639 struct vlan_entry
*vlan
;
2641 if (ip
== bond
->master_ip
)
2644 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2645 if (ip
== vlan
->vlan_ip
)
2653 * We go to the (large) trouble of VLAN tagging ARP frames because
2654 * switches in VLAN mode (especially if ports are configured as
2655 * "native" to a VLAN) might not pass non-tagged frames.
2657 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2659 struct sk_buff
*skb
;
2661 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2662 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2664 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2665 NULL
, slave_dev
->dev_addr
, NULL
);
2668 pr_err("ARP packet allocation failed\n");
2672 skb
= vlan_put_tag(skb
, vlan_id
);
2674 pr_err("failed to insert VLAN tag\n");
2682 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2685 __be32
*targets
= bond
->params
.arp_targets
;
2686 struct vlan_entry
*vlan
;
2687 struct net_device
*vlan_dev
;
2691 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2694 pr_debug("basa: target %x\n", targets
[i
]);
2696 pr_debug("basa: empty vlan: arp_send\n");
2697 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2698 bond
->master_ip
, 0);
2703 * If VLANs are configured, we do a route lookup to
2704 * determine which VLAN interface would be used, so we
2705 * can tag the ARP with the proper VLAN tag.
2707 memset(&fl
, 0, sizeof(fl
));
2708 fl
.fl4_dst
= targets
[i
];
2709 fl
.fl4_tos
= RTO_ONLINK
;
2711 rt
= ip_route_output_key(dev_net(bond
->dev
), &fl
);
2713 if (net_ratelimit()) {
2714 pr_warning("%s: no route to arp_ip_target %pI4\n",
2715 bond
->dev
->name
, &fl
.fl4_dst
);
2721 * This target is not on a VLAN
2723 if (rt
->dst
.dev
== bond
->dev
) {
2725 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2726 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2727 bond
->master_ip
, 0);
2732 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2733 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2734 if (vlan_dev
== rt
->dst
.dev
) {
2735 vlan_id
= vlan
->vlan_id
;
2736 pr_debug("basa: vlan match on %s %d\n",
2737 vlan_dev
->name
, vlan_id
);
2744 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2745 vlan
->vlan_ip
, vlan_id
);
2749 if (net_ratelimit()) {
2750 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2751 bond
->dev
->name
, &fl
.fl4_dst
,
2752 rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2759 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2760 * for each VLAN above us.
2762 * Caller must hold curr_slave_lock for read or better
2764 static void bond_send_gratuitous_arp(struct bonding
*bond
)
2766 struct slave
*slave
= bond
->curr_active_slave
;
2767 struct vlan_entry
*vlan
;
2768 struct net_device
*vlan_dev
;
2770 pr_debug("bond_send_grat_arp: bond %s slave %s\n",
2771 bond
->dev
->name
, slave
? slave
->dev
->name
: "NULL");
2773 if (!slave
|| !bond
->send_grat_arp
||
2774 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
2777 bond
->send_grat_arp
--;
2779 if (bond
->master_ip
) {
2780 bond_arp_send(slave
->dev
, ARPOP_REPLY
, bond
->master_ip
,
2781 bond
->master_ip
, 0);
2787 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2788 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2789 if (vlan
->vlan_ip
) {
2790 bond_arp_send(slave
->dev
, ARPOP_REPLY
, vlan
->vlan_ip
,
2791 vlan
->vlan_ip
, vlan
->vlan_id
);
2796 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2799 __be32
*targets
= bond
->params
.arp_targets
;
2801 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2802 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2803 &sip
, &tip
, i
, &targets
[i
],
2804 bond_has_this_ip(bond
, tip
));
2805 if (sip
== targets
[i
]) {
2806 if (bond_has_this_ip(bond
, tip
))
2807 slave
->last_arp_rx
= jiffies
;
2813 static int bond_arp_rcv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
*pt
, struct net_device
*orig_dev
)
2816 struct slave
*slave
;
2817 struct bonding
*bond
;
2818 unsigned char *arp_ptr
;
2821 if (dev
->priv_flags
& IFF_802_1Q_VLAN
) {
2823 * When using VLANS and bonding, dev and oriv_dev may be
2824 * incorrect if the physical interface supports VLAN
2825 * acceleration. With this change ARP validation now
2826 * works for hosts only reachable on the VLAN interface.
2828 dev
= vlan_dev_real_dev(dev
);
2829 orig_dev
= dev_get_by_index_rcu(dev_net(skb
->dev
),skb
->skb_iif
);
2832 if (!(dev
->priv_flags
& IFF_BONDING
) || !(dev
->flags
& IFF_MASTER
))
2835 bond
= netdev_priv(dev
);
2836 read_lock(&bond
->lock
);
2838 pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2839 bond
->dev
->name
, skb
->dev
? skb
->dev
->name
: "NULL",
2840 orig_dev
? orig_dev
->name
: "NULL");
2842 slave
= bond_get_slave_by_dev(bond
, orig_dev
);
2843 if (!slave
|| !slave_do_arp_validate(bond
, slave
))
2846 skb
= skb_share_check(skb
, GFP_ATOMIC
);
2850 if (!pskb_may_pull(skb
, arp_hdr_len(dev
)))
2854 if (arp
->ar_hln
!= dev
->addr_len
||
2855 skb
->pkt_type
== PACKET_OTHERHOST
||
2856 skb
->pkt_type
== PACKET_LOOPBACK
||
2857 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2858 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2862 arp_ptr
= (unsigned char *)(arp
+ 1);
2863 arp_ptr
+= dev
->addr_len
;
2864 memcpy(&sip
, arp_ptr
, 4);
2865 arp_ptr
+= 4 + dev
->addr_len
;
2866 memcpy(&tip
, arp_ptr
, 4);
2868 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2869 bond
->dev
->name
, slave
->dev
->name
, slave
->state
,
2870 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2874 * Backup slaves won't see the ARP reply, but do come through
2875 * here for each ARP probe (so we swap the sip/tip to validate
2876 * the probe). In a "redundant switch, common router" type of
2877 * configuration, the ARP probe will (hopefully) travel from
2878 * the active, through one switch, the router, then the other
2879 * switch before reaching the backup.
2881 if (slave
->state
== BOND_STATE_ACTIVE
)
2882 bond_validate_arp(bond
, slave
, sip
, tip
);
2884 bond_validate_arp(bond
, slave
, tip
, sip
);
2887 read_unlock(&bond
->lock
);
2890 return NET_RX_SUCCESS
;
2894 * this function is called regularly to monitor each slave's link
2895 * ensuring that traffic is being sent and received when arp monitoring
2896 * is used in load-balancing mode. if the adapter has been dormant, then an
2897 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2898 * arp monitoring in active backup mode.
2900 void bond_loadbalance_arp_mon(struct work_struct
*work
)
2902 struct bonding
*bond
= container_of(work
, struct bonding
,
2904 struct slave
*slave
, *oldcurrent
;
2905 int do_failover
= 0;
2909 read_lock(&bond
->lock
);
2911 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2913 if (bond
->kill_timers
)
2916 if (bond
->slave_cnt
== 0)
2919 read_lock(&bond
->curr_slave_lock
);
2920 oldcurrent
= bond
->curr_active_slave
;
2921 read_unlock(&bond
->curr_slave_lock
);
2923 /* see if any of the previous devices are up now (i.e. they have
2924 * xmt and rcv traffic). the curr_active_slave does not come into
2925 * the picture unless it is null. also, slave->jiffies is not needed
2926 * here because we send an arp on each slave and give a slave as
2927 * long as it needs to get the tx/rx within the delta.
2928 * TODO: what about up/down delay in arp mode? it wasn't here before
2931 bond_for_each_slave(bond
, slave
, i
) {
2932 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2934 if (slave
->link
!= BOND_LINK_UP
) {
2935 if (time_in_range(jiffies
,
2936 trans_start
- delta_in_ticks
,
2937 trans_start
+ delta_in_ticks
) &&
2938 time_in_range(jiffies
,
2939 slave
->dev
->last_rx
- delta_in_ticks
,
2940 slave
->dev
->last_rx
+ delta_in_ticks
)) {
2942 slave
->link
= BOND_LINK_UP
;
2943 slave
->state
= BOND_STATE_ACTIVE
;
2945 /* primary_slave has no meaning in round-robin
2946 * mode. the window of a slave being up and
2947 * curr_active_slave being null after enslaving
2951 pr_info("%s: link status definitely up for interface %s, ",
2956 pr_info("%s: interface %s is now up\n",
2962 /* slave->link == BOND_LINK_UP */
2964 /* not all switches will respond to an arp request
2965 * when the source ip is 0, so don't take the link down
2966 * if we don't know our ip yet
2968 if (!time_in_range(jiffies
,
2969 trans_start
- delta_in_ticks
,
2970 trans_start
+ 2 * delta_in_ticks
) ||
2971 !time_in_range(jiffies
,
2972 slave
->dev
->last_rx
- delta_in_ticks
,
2973 slave
->dev
->last_rx
+ 2 * delta_in_ticks
)) {
2975 slave
->link
= BOND_LINK_DOWN
;
2976 slave
->state
= BOND_STATE_BACKUP
;
2978 if (slave
->link_failure_count
< UINT_MAX
)
2979 slave
->link_failure_count
++;
2981 pr_info("%s: interface %s is now down.\n",
2985 if (slave
== oldcurrent
)
2990 /* note: if switch is in round-robin mode, all links
2991 * must tx arp to ensure all links rx an arp - otherwise
2992 * links may oscillate or not come up at all; if switch is
2993 * in something like xor mode, there is nothing we can
2994 * do - all replies will be rx'ed on same link causing slaves
2995 * to be unstable during low/no traffic periods
2997 if (IS_UP(slave
->dev
))
2998 bond_arp_send_all(bond
, slave
);
3003 write_lock_bh(&bond
->curr_slave_lock
);
3005 bond_select_active_slave(bond
);
3007 write_unlock_bh(&bond
->curr_slave_lock
);
3008 unblock_netpoll_tx();
3012 if (bond
->params
.arp_interval
)
3013 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3015 read_unlock(&bond
->lock
);
3019 * Called to inspect slaves for active-backup mode ARP monitor link state
3020 * changes. Sets new_link in slaves to specify what action should take
3021 * place for the slave. Returns 0 if no changes are found, >0 if changes
3022 * to link states must be committed.
3024 * Called with bond->lock held for read.
3026 static int bond_ab_arp_inspect(struct bonding
*bond
, int delta_in_ticks
)
3028 struct slave
*slave
;
3030 unsigned long trans_start
;
3032 bond_for_each_slave(bond
, slave
, i
) {
3033 slave
->new_link
= BOND_LINK_NOCHANGE
;
3035 if (slave
->link
!= BOND_LINK_UP
) {
3036 if (time_in_range(jiffies
,
3037 slave_last_rx(bond
, slave
) - delta_in_ticks
,
3038 slave_last_rx(bond
, slave
) + delta_in_ticks
)) {
3040 slave
->new_link
= BOND_LINK_UP
;
3048 * Give slaves 2*delta after being enslaved or made
3049 * active. This avoids bouncing, as the last receive
3050 * times need a full ARP monitor cycle to be updated.
3052 if (time_in_range(jiffies
,
3053 slave
->jiffies
- delta_in_ticks
,
3054 slave
->jiffies
+ 2 * delta_in_ticks
))
3058 * Backup slave is down if:
3059 * - No current_arp_slave AND
3060 * - more than 3*delta since last receive AND
3061 * - the bond has an IP address
3063 * Note: a non-null current_arp_slave indicates
3064 * the curr_active_slave went down and we are
3065 * searching for a new one; under this condition
3066 * we only take the curr_active_slave down - this
3067 * gives each slave a chance to tx/rx traffic
3068 * before being taken out
3070 if (slave
->state
== BOND_STATE_BACKUP
&&
3071 !bond
->current_arp_slave
&&
3072 !time_in_range(jiffies
,
3073 slave_last_rx(bond
, slave
) - delta_in_ticks
,
3074 slave_last_rx(bond
, slave
) + 3 * delta_in_ticks
)) {
3076 slave
->new_link
= BOND_LINK_DOWN
;
3081 * Active slave is down if:
3082 * - more than 2*delta since transmitting OR
3083 * - (more than 2*delta since receive AND
3084 * the bond has an IP address)
3086 trans_start
= dev_trans_start(slave
->dev
);
3087 if ((slave
->state
== BOND_STATE_ACTIVE
) &&
3088 (!time_in_range(jiffies
,
3089 trans_start
- delta_in_ticks
,
3090 trans_start
+ 2 * delta_in_ticks
) ||
3091 !time_in_range(jiffies
,
3092 slave_last_rx(bond
, slave
) - delta_in_ticks
,
3093 slave_last_rx(bond
, slave
) + 2 * delta_in_ticks
))) {
3095 slave
->new_link
= BOND_LINK_DOWN
;
3104 * Called to commit link state changes noted by inspection step of
3105 * active-backup mode ARP monitor.
3107 * Called with RTNL and bond->lock for read.
3109 static void bond_ab_arp_commit(struct bonding
*bond
, int delta_in_ticks
)
3111 struct slave
*slave
;
3113 unsigned long trans_start
;
3115 bond_for_each_slave(bond
, slave
, i
) {
3116 switch (slave
->new_link
) {
3117 case BOND_LINK_NOCHANGE
:
3121 trans_start
= dev_trans_start(slave
->dev
);
3122 if ((!bond
->curr_active_slave
&&
3123 time_in_range(jiffies
,
3124 trans_start
- delta_in_ticks
,
3125 trans_start
+ delta_in_ticks
)) ||
3126 bond
->curr_active_slave
!= slave
) {
3127 slave
->link
= BOND_LINK_UP
;
3128 bond
->current_arp_slave
= NULL
;
3130 pr_info("%s: link status definitely up for interface %s.\n",
3131 bond
->dev
->name
, slave
->dev
->name
);
3133 if (!bond
->curr_active_slave
||
3134 (slave
== bond
->primary_slave
))
3141 case BOND_LINK_DOWN
:
3142 if (slave
->link_failure_count
< UINT_MAX
)
3143 slave
->link_failure_count
++;
3145 slave
->link
= BOND_LINK_DOWN
;
3146 bond_set_slave_inactive_flags(slave
);
3148 pr_info("%s: link status definitely down for interface %s, disabling it\n",
3149 bond
->dev
->name
, slave
->dev
->name
);
3151 if (slave
== bond
->curr_active_slave
) {
3152 bond
->current_arp_slave
= NULL
;
3159 pr_err("%s: impossible: new_link %d on slave %s\n",
3160 bond
->dev
->name
, slave
->new_link
,
3168 write_lock_bh(&bond
->curr_slave_lock
);
3169 bond_select_active_slave(bond
);
3170 write_unlock_bh(&bond
->curr_slave_lock
);
3171 unblock_netpoll_tx();
3174 bond_set_carrier(bond
);
3178 * Send ARP probes for active-backup mode ARP monitor.
3180 * Called with bond->lock held for read.
3182 static void bond_ab_arp_probe(struct bonding
*bond
)
3184 struct slave
*slave
;
3187 read_lock(&bond
->curr_slave_lock
);
3189 if (bond
->current_arp_slave
&& bond
->curr_active_slave
)
3190 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3191 bond
->current_arp_slave
->dev
->name
,
3192 bond
->curr_active_slave
->dev
->name
);
3194 if (bond
->curr_active_slave
) {
3195 bond_arp_send_all(bond
, bond
->curr_active_slave
);
3196 read_unlock(&bond
->curr_slave_lock
);
3200 read_unlock(&bond
->curr_slave_lock
);
3202 /* if we don't have a curr_active_slave, search for the next available
3203 * backup slave from the current_arp_slave and make it the candidate
3204 * for becoming the curr_active_slave
3207 if (!bond
->current_arp_slave
) {
3208 bond
->current_arp_slave
= bond
->first_slave
;
3209 if (!bond
->current_arp_slave
)
3213 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
3215 /* search for next candidate */
3216 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
3217 if (IS_UP(slave
->dev
)) {
3218 slave
->link
= BOND_LINK_BACK
;
3219 bond_set_slave_active_flags(slave
);
3220 bond_arp_send_all(bond
, slave
);
3221 slave
->jiffies
= jiffies
;
3222 bond
->current_arp_slave
= slave
;
3226 /* if the link state is up at this point, we
3227 * mark it down - this can happen if we have
3228 * simultaneous link failures and
3229 * reselect_active_interface doesn't make this
3230 * one the current slave so it is still marked
3231 * up when it is actually down
3233 if (slave
->link
== BOND_LINK_UP
) {
3234 slave
->link
= BOND_LINK_DOWN
;
3235 if (slave
->link_failure_count
< UINT_MAX
)
3236 slave
->link_failure_count
++;
3238 bond_set_slave_inactive_flags(slave
);
3240 pr_info("%s: backup interface %s is now down.\n",
3241 bond
->dev
->name
, slave
->dev
->name
);
3246 void bond_activebackup_arp_mon(struct work_struct
*work
)
3248 struct bonding
*bond
= container_of(work
, struct bonding
,
3252 read_lock(&bond
->lock
);
3254 if (bond
->kill_timers
)
3257 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3259 if (bond
->slave_cnt
== 0)
3262 if (bond
->send_grat_arp
) {
3263 read_lock(&bond
->curr_slave_lock
);
3264 bond_send_gratuitous_arp(bond
);
3265 read_unlock(&bond
->curr_slave_lock
);
3268 if (bond
->send_unsol_na
) {
3269 read_lock(&bond
->curr_slave_lock
);
3270 bond_send_unsolicited_na(bond
);
3271 read_unlock(&bond
->curr_slave_lock
);
3274 if (bond_ab_arp_inspect(bond
, delta_in_ticks
)) {
3275 read_unlock(&bond
->lock
);
3277 read_lock(&bond
->lock
);
3279 bond_ab_arp_commit(bond
, delta_in_ticks
);
3281 read_unlock(&bond
->lock
);
3283 read_lock(&bond
->lock
);
3286 bond_ab_arp_probe(bond
);
3289 if (bond
->params
.arp_interval
)
3290 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3292 read_unlock(&bond
->lock
);
3295 /*------------------------------ proc/seq_file-------------------------------*/
3297 #ifdef CONFIG_PROC_FS
3299 static void *bond_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3301 __acquires(&bond
->lock
)
3303 struct bonding
*bond
= seq
->private;
3305 struct slave
*slave
;
3308 /* make sure the bond won't be taken away */
3310 read_lock(&bond
->lock
);
3313 return SEQ_START_TOKEN
;
3315 bond_for_each_slave(bond
, slave
, i
) {
3323 static void *bond_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3325 struct bonding
*bond
= seq
->private;
3326 struct slave
*slave
= v
;
3329 if (v
== SEQ_START_TOKEN
)
3330 return bond
->first_slave
;
3332 slave
= slave
->next
;
3334 return (slave
== bond
->first_slave
) ? NULL
: slave
;
3337 static void bond_info_seq_stop(struct seq_file
*seq
, void *v
)
3338 __releases(&bond
->lock
)
3341 struct bonding
*bond
= seq
->private;
3343 read_unlock(&bond
->lock
);
3347 static void bond_info_show_master(struct seq_file
*seq
)
3349 struct bonding
*bond
= seq
->private;
3353 read_lock(&bond
->curr_slave_lock
);
3354 curr
= bond
->curr_active_slave
;
3355 read_unlock(&bond
->curr_slave_lock
);
3357 seq_printf(seq
, "Bonding Mode: %s",
3358 bond_mode_name(bond
->params
.mode
));
3360 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
&&
3361 bond
->params
.fail_over_mac
)
3362 seq_printf(seq
, " (fail_over_mac %s)",
3363 fail_over_mac_tbl
[bond
->params
.fail_over_mac
].modename
);
3365 seq_printf(seq
, "\n");
3367 if (bond
->params
.mode
== BOND_MODE_XOR
||
3368 bond
->params
.mode
== BOND_MODE_8023AD
) {
3369 seq_printf(seq
, "Transmit Hash Policy: %s (%d)\n",
3370 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
3371 bond
->params
.xmit_policy
);
3374 if (USES_PRIMARY(bond
->params
.mode
)) {
3375 seq_printf(seq
, "Primary Slave: %s",
3376 (bond
->primary_slave
) ?
3377 bond
->primary_slave
->dev
->name
: "None");
3378 if (bond
->primary_slave
)
3379 seq_printf(seq
, " (primary_reselect %s)",
3380 pri_reselect_tbl
[bond
->params
.primary_reselect
].modename
);
3382 seq_printf(seq
, "\nCurrently Active Slave: %s\n",
3383 (curr
) ? curr
->dev
->name
: "None");
3386 seq_printf(seq
, "MII Status: %s\n", netif_carrier_ok(bond
->dev
) ?
3388 seq_printf(seq
, "MII Polling Interval (ms): %d\n", bond
->params
.miimon
);
3389 seq_printf(seq
, "Up Delay (ms): %d\n",
3390 bond
->params
.updelay
* bond
->params
.miimon
);
3391 seq_printf(seq
, "Down Delay (ms): %d\n",
3392 bond
->params
.downdelay
* bond
->params
.miimon
);
3395 /* ARP information */
3396 if (bond
->params
.arp_interval
> 0) {
3398 seq_printf(seq
, "ARP Polling Interval (ms): %d\n",
3399 bond
->params
.arp_interval
);
3401 seq_printf(seq
, "ARP IP target/s (n.n.n.n form):");
3403 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
3404 if (!bond
->params
.arp_targets
[i
])
3407 seq_printf(seq
, ",");
3408 seq_printf(seq
, " %pI4", &bond
->params
.arp_targets
[i
]);
3411 seq_printf(seq
, "\n");
3414 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3415 struct ad_info ad_info
;
3417 seq_puts(seq
, "\n802.3ad info\n");
3418 seq_printf(seq
, "LACP rate: %s\n",
3419 (bond
->params
.lacp_fast
) ? "fast" : "slow");
3420 seq_printf(seq
, "Aggregator selection policy (ad_select): %s\n",
3421 ad_select_tbl
[bond
->params
.ad_select
].modename
);
3423 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
3424 seq_printf(seq
, "bond %s has no active aggregator\n",
3427 seq_printf(seq
, "Active Aggregator Info:\n");
3429 seq_printf(seq
, "\tAggregator ID: %d\n",
3430 ad_info
.aggregator_id
);
3431 seq_printf(seq
, "\tNumber of ports: %d\n",
3433 seq_printf(seq
, "\tActor Key: %d\n",
3435 seq_printf(seq
, "\tPartner Key: %d\n",
3436 ad_info
.partner_key
);
3437 seq_printf(seq
, "\tPartner Mac Address: %pM\n",
3438 ad_info
.partner_system
);
3443 static void bond_info_show_slave(struct seq_file
*seq
,
3444 const struct slave
*slave
)
3446 struct bonding
*bond
= seq
->private;
3448 seq_printf(seq
, "\nSlave Interface: %s\n", slave
->dev
->name
);
3449 seq_printf(seq
, "MII Status: %s\n",
3450 (slave
->link
== BOND_LINK_UP
) ? "up" : "down");
3451 seq_printf(seq
, "Speed: %d Mbps\n", slave
->speed
);
3452 seq_printf(seq
, "Duplex: %s\n", slave
->duplex
? "full" : "half");
3453 seq_printf(seq
, "Link Failure Count: %u\n",
3454 slave
->link_failure_count
);
3456 seq_printf(seq
, "Permanent HW addr: %pM\n", slave
->perm_hwaddr
);
3458 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3459 const struct aggregator
*agg
3460 = SLAVE_AD_INFO(slave
).port
.aggregator
;
3463 seq_printf(seq
, "Aggregator ID: %d\n",
3464 agg
->aggregator_identifier
);
3466 seq_puts(seq
, "Aggregator ID: N/A\n");
3468 seq_printf(seq
, "Slave queue ID: %d\n", slave
->queue_id
);
3471 static int bond_info_seq_show(struct seq_file
*seq
, void *v
)
3473 if (v
== SEQ_START_TOKEN
) {
3474 seq_printf(seq
, "%s\n", version
);
3475 bond_info_show_master(seq
);
3477 bond_info_show_slave(seq
, v
);
3482 static const struct seq_operations bond_info_seq_ops
= {
3483 .start
= bond_info_seq_start
,
3484 .next
= bond_info_seq_next
,
3485 .stop
= bond_info_seq_stop
,
3486 .show
= bond_info_seq_show
,
3489 static int bond_info_open(struct inode
*inode
, struct file
*file
)
3491 struct seq_file
*seq
;
3492 struct proc_dir_entry
*proc
;
3495 res
= seq_open(file
, &bond_info_seq_ops
);
3497 /* recover the pointer buried in proc_dir_entry data */
3498 seq
= file
->private_data
;
3500 seq
->private = proc
->data
;
3506 static const struct file_operations bond_info_fops
= {
3507 .owner
= THIS_MODULE
,
3508 .open
= bond_info_open
,
3510 .llseek
= seq_lseek
,
3511 .release
= seq_release
,
3514 static void bond_create_proc_entry(struct bonding
*bond
)
3516 struct net_device
*bond_dev
= bond
->dev
;
3517 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
3520 bond
->proc_entry
= proc_create_data(bond_dev
->name
,
3521 S_IRUGO
, bn
->proc_dir
,
3522 &bond_info_fops
, bond
);
3523 if (bond
->proc_entry
== NULL
)
3524 pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
3525 DRV_NAME
, bond_dev
->name
);
3527 memcpy(bond
->proc_file_name
, bond_dev
->name
, IFNAMSIZ
);
3531 static void bond_remove_proc_entry(struct bonding
*bond
)
3533 struct net_device
*bond_dev
= bond
->dev
;
3534 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
3536 if (bn
->proc_dir
&& bond
->proc_entry
) {
3537 remove_proc_entry(bond
->proc_file_name
, bn
->proc_dir
);
3538 memset(bond
->proc_file_name
, 0, IFNAMSIZ
);
3539 bond
->proc_entry
= NULL
;
3543 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3544 * Caller must hold rtnl_lock.
3546 static void __net_init
bond_create_proc_dir(struct bond_net
*bn
)
3548 if (!bn
->proc_dir
) {
3549 bn
->proc_dir
= proc_mkdir(DRV_NAME
, bn
->net
->proc_net
);
3551 pr_warning("Warning: cannot create /proc/net/%s\n",
3556 /* Destroy the bonding directory under /proc/net, if empty.
3557 * Caller must hold rtnl_lock.
3559 static void __net_exit
bond_destroy_proc_dir(struct bond_net
*bn
)
3562 remove_proc_entry(DRV_NAME
, bn
->net
->proc_net
);
3563 bn
->proc_dir
= NULL
;
3567 #else /* !CONFIG_PROC_FS */
3569 static void bond_create_proc_entry(struct bonding
*bond
)
3573 static void bond_remove_proc_entry(struct bonding
*bond
)
3577 static inline void bond_create_proc_dir(struct bond_net
*bn
)
3581 static inline void bond_destroy_proc_dir(struct bond_net
*bn
)
3585 #endif /* CONFIG_PROC_FS */
3588 /*-------------------------- netdev event handling --------------------------*/
3591 * Change device name
3593 static int bond_event_changename(struct bonding
*bond
)
3595 bond_remove_proc_entry(bond
);
3596 bond_create_proc_entry(bond
);
3598 bond_debug_reregister(bond
);
3603 static int bond_master_netdev_event(unsigned long event
,
3604 struct net_device
*bond_dev
)
3606 struct bonding
*event_bond
= netdev_priv(bond_dev
);
3609 case NETDEV_CHANGENAME
:
3610 return bond_event_changename(event_bond
);
3618 static int bond_slave_netdev_event(unsigned long event
,
3619 struct net_device
*slave_dev
)
3621 struct net_device
*bond_dev
= slave_dev
->master
;
3622 struct bonding
*bond
= netdev_priv(bond_dev
);
3625 case NETDEV_UNREGISTER
:
3627 if (bond
->setup_by_slave
)
3628 bond_release_and_destroy(bond_dev
, slave_dev
);
3630 bond_release(bond_dev
, slave_dev
);
3634 if (bond
->params
.mode
== BOND_MODE_8023AD
|| bond_is_lb(bond
)) {
3635 struct slave
*slave
;
3637 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
3639 u16 old_speed
= slave
->speed
;
3640 u16 old_duplex
= slave
->duplex
;
3642 bond_update_speed_duplex(slave
);
3644 if (bond_is_lb(bond
))
3647 if (old_speed
!= slave
->speed
)
3648 bond_3ad_adapter_speed_changed(slave
);
3649 if (old_duplex
!= slave
->duplex
)
3650 bond_3ad_adapter_duplex_changed(slave
);
3657 * ... Or is it this?
3660 case NETDEV_CHANGEMTU
:
3662 * TODO: Should slaves be allowed to
3663 * independently alter their MTU? For
3664 * an active-backup bond, slaves need
3665 * not be the same type of device, so
3666 * MTUs may vary. For other modes,
3667 * slaves arguably should have the
3668 * same MTUs. To do this, we'd need to
3669 * take over the slave's change_mtu
3670 * function for the duration of their
3674 case NETDEV_CHANGENAME
:
3676 * TODO: handle changing the primary's name
3679 case NETDEV_FEAT_CHANGE
:
3680 bond_compute_features(bond
);
3690 * bond_netdev_event: handle netdev notifier chain events.
3692 * This function receives events for the netdev chain. The caller (an
3693 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3694 * locks for us to safely manipulate the slave devices (RTNL lock,
3697 static int bond_netdev_event(struct notifier_block
*this,
3698 unsigned long event
, void *ptr
)
3700 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3702 pr_debug("event_dev: %s, event: %lx\n",
3703 event_dev
? event_dev
->name
: "None",
3706 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3709 if (event_dev
->flags
& IFF_MASTER
) {
3710 pr_debug("IFF_MASTER\n");
3711 return bond_master_netdev_event(event
, event_dev
);
3714 if (event_dev
->flags
& IFF_SLAVE
) {
3715 pr_debug("IFF_SLAVE\n");
3716 return bond_slave_netdev_event(event
, event_dev
);
3723 * bond_inetaddr_event: handle inetaddr notifier chain events.
3725 * We keep track of device IPs primarily to use as source addresses in
3726 * ARP monitor probes (rather than spewing out broadcasts all the time).
3728 * We track one IP for the main device (if it has one), plus one per VLAN.
3730 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3732 struct in_ifaddr
*ifa
= ptr
;
3733 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3734 struct bond_net
*bn
= net_generic(dev_net(event_dev
), bond_net_id
);
3735 struct bonding
*bond
;
3736 struct vlan_entry
*vlan
;
3738 list_for_each_entry(bond
, &bn
->dev_list
, bond_list
) {
3739 if (bond
->dev
== event_dev
) {
3742 bond
->master_ip
= ifa
->ifa_local
;
3745 bond
->master_ip
= bond_glean_dev_ip(bond
->dev
);
3752 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
3755 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
3756 if (vlan_dev
== event_dev
) {
3759 vlan
->vlan_ip
= ifa
->ifa_local
;
3763 bond_glean_dev_ip(vlan_dev
);
3774 static struct notifier_block bond_netdev_notifier
= {
3775 .notifier_call
= bond_netdev_event
,
3778 static struct notifier_block bond_inetaddr_notifier
= {
3779 .notifier_call
= bond_inetaddr_event
,
3782 /*-------------------------- Packet type handling ---------------------------*/
3784 /* register to receive lacpdus on a bond */
3785 static void bond_register_lacpdu(struct bonding
*bond
)
3787 struct packet_type
*pk_type
= &(BOND_AD_INFO(bond
).ad_pkt_type
);
3789 /* initialize packet type */
3790 pk_type
->type
= PKT_TYPE_LACPDU
;
3791 pk_type
->dev
= bond
->dev
;
3792 pk_type
->func
= bond_3ad_lacpdu_recv
;
3794 dev_add_pack(pk_type
);
3797 /* unregister to receive lacpdus on a bond */
3798 static void bond_unregister_lacpdu(struct bonding
*bond
)
3800 dev_remove_pack(&(BOND_AD_INFO(bond
).ad_pkt_type
));
3803 void bond_register_arp(struct bonding
*bond
)
3805 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3810 pt
->type
= htons(ETH_P_ARP
);
3811 pt
->dev
= bond
->dev
;
3812 pt
->func
= bond_arp_rcv
;
3816 void bond_unregister_arp(struct bonding
*bond
)
3818 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3820 dev_remove_pack(pt
);
3824 /*---------------------------- Hashing Policies -----------------------------*/
3827 * Hash for the output device based upon layer 2 and layer 3 data. If
3828 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3830 static int bond_xmit_hash_policy_l23(struct sk_buff
*skb
, int count
)
3832 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3833 struct iphdr
*iph
= ip_hdr(skb
);
3835 if (skb
->protocol
== htons(ETH_P_IP
)) {
3836 return ((ntohl(iph
->saddr
^ iph
->daddr
) & 0xffff) ^
3837 (data
->h_dest
[5] ^ data
->h_source
[5])) % count
;
3840 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3844 * Hash for the output device based upon layer 3 and layer 4 data. If
3845 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3846 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3848 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
, int count
)
3850 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3851 struct iphdr
*iph
= ip_hdr(skb
);
3852 __be16
*layer4hdr
= (__be16
*)((u32
*)iph
+ iph
->ihl
);
3855 if (skb
->protocol
== htons(ETH_P_IP
)) {
3856 if (!(iph
->frag_off
& htons(IP_MF
|IP_OFFSET
)) &&
3857 (iph
->protocol
== IPPROTO_TCP
||
3858 iph
->protocol
== IPPROTO_UDP
)) {
3859 layer4_xor
= ntohs((*layer4hdr
^ *(layer4hdr
+ 1)));
3861 return (layer4_xor
^
3862 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3866 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3870 * Hash for the output device based upon layer 2 data
3872 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
, int count
)
3874 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3876 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3879 /*-------------------------- Device entry points ----------------------------*/
3881 static int bond_open(struct net_device
*bond_dev
)
3883 struct bonding
*bond
= netdev_priv(bond_dev
);
3885 bond
->kill_timers
= 0;
3887 INIT_DELAYED_WORK(&bond
->mcast_work
, bond_resend_igmp_join_requests_delayed
);
3889 if (bond_is_lb(bond
)) {
3890 /* bond_alb_initialize must be called before the timer
3893 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3894 /* something went wrong - fail the open operation */
3898 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3899 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3902 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3903 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3904 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3907 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3908 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3909 INIT_DELAYED_WORK(&bond
->arp_work
,
3910 bond_activebackup_arp_mon
);
3912 INIT_DELAYED_WORK(&bond
->arp_work
,
3913 bond_loadbalance_arp_mon
);
3915 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3916 if (bond
->params
.arp_validate
)
3917 bond_register_arp(bond
);
3920 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3921 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3922 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3923 /* register to receive LACPDUs */
3924 bond_register_lacpdu(bond
);
3925 bond_3ad_initiate_agg_selection(bond
, 1);
3931 static int bond_close(struct net_device
*bond_dev
)
3933 struct bonding
*bond
= netdev_priv(bond_dev
);
3935 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3936 /* Unregister the receive of LACPDUs */
3937 bond_unregister_lacpdu(bond
);
3940 if (bond
->params
.arp_validate
)
3941 bond_unregister_arp(bond
);
3943 write_lock_bh(&bond
->lock
);
3945 bond
->send_grat_arp
= 0;
3946 bond
->send_unsol_na
= 0;
3948 /* signal timers not to re-arm */
3949 bond
->kill_timers
= 1;
3951 write_unlock_bh(&bond
->lock
);
3953 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3954 cancel_delayed_work(&bond
->mii_work
);
3957 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3958 cancel_delayed_work(&bond
->arp_work
);
3961 switch (bond
->params
.mode
) {
3962 case BOND_MODE_8023AD
:
3963 cancel_delayed_work(&bond
->ad_work
);
3967 cancel_delayed_work(&bond
->alb_work
);
3973 if (delayed_work_pending(&bond
->mcast_work
))
3974 cancel_delayed_work(&bond
->mcast_work
);
3976 if (bond_is_lb(bond
)) {
3977 /* Must be called only after all
3978 * slaves have been released
3980 bond_alb_deinitialize(bond
);
3986 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3987 struct rtnl_link_stats64
*stats
)
3989 struct bonding
*bond
= netdev_priv(bond_dev
);
3990 struct rtnl_link_stats64 temp
;
3991 struct slave
*slave
;
3994 memset(stats
, 0, sizeof(*stats
));
3996 read_lock_bh(&bond
->lock
);
3998 bond_for_each_slave(bond
, slave
, i
) {
3999 const struct rtnl_link_stats64
*sstats
=
4000 dev_get_stats(slave
->dev
, &temp
);
4002 stats
->rx_packets
+= sstats
->rx_packets
;
4003 stats
->rx_bytes
+= sstats
->rx_bytes
;
4004 stats
->rx_errors
+= sstats
->rx_errors
;
4005 stats
->rx_dropped
+= sstats
->rx_dropped
;
4007 stats
->tx_packets
+= sstats
->tx_packets
;
4008 stats
->tx_bytes
+= sstats
->tx_bytes
;
4009 stats
->tx_errors
+= sstats
->tx_errors
;
4010 stats
->tx_dropped
+= sstats
->tx_dropped
;
4012 stats
->multicast
+= sstats
->multicast
;
4013 stats
->collisions
+= sstats
->collisions
;
4015 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
4016 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
4017 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
4018 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
4019 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
4020 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
4022 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
4023 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
4024 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
4025 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
4026 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
4029 read_unlock_bh(&bond
->lock
);
4034 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
4036 struct net_device
*slave_dev
= NULL
;
4037 struct ifbond k_binfo
;
4038 struct ifbond __user
*u_binfo
= NULL
;
4039 struct ifslave k_sinfo
;
4040 struct ifslave __user
*u_sinfo
= NULL
;
4041 struct mii_ioctl_data
*mii
= NULL
;
4044 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev
->name
, cmd
);
4056 * We do this again just in case we were called by SIOCGMIIREG
4057 * instead of SIOCGMIIPHY.
4064 if (mii
->reg_num
== 1) {
4065 struct bonding
*bond
= netdev_priv(bond_dev
);
4067 read_lock(&bond
->lock
);
4068 read_lock(&bond
->curr_slave_lock
);
4069 if (netif_carrier_ok(bond
->dev
))
4070 mii
->val_out
= BMSR_LSTATUS
;
4072 read_unlock(&bond
->curr_slave_lock
);
4073 read_unlock(&bond
->lock
);
4077 case BOND_INFO_QUERY_OLD
:
4078 case SIOCBONDINFOQUERY
:
4079 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
4081 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
4084 res
= bond_info_query(bond_dev
, &k_binfo
);
4086 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
4090 case BOND_SLAVE_INFO_QUERY_OLD
:
4091 case SIOCBONDSLAVEINFOQUERY
:
4092 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
4094 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
4097 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
4099 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
4108 if (!capable(CAP_NET_ADMIN
))
4111 slave_dev
= dev_get_by_name(dev_net(bond_dev
), ifr
->ifr_slave
);
4113 pr_debug("slave_dev=%p:\n", slave_dev
);
4118 pr_debug("slave_dev->name=%s:\n", slave_dev
->name
);
4120 case BOND_ENSLAVE_OLD
:
4121 case SIOCBONDENSLAVE
:
4122 res
= bond_enslave(bond_dev
, slave_dev
);
4124 case BOND_RELEASE_OLD
:
4125 case SIOCBONDRELEASE
:
4126 res
= bond_release(bond_dev
, slave_dev
);
4128 case BOND_SETHWADDR_OLD
:
4129 case SIOCBONDSETHWADDR
:
4130 res
= bond_sethwaddr(bond_dev
, slave_dev
);
4132 case BOND_CHANGE_ACTIVE_OLD
:
4133 case SIOCBONDCHANGEACTIVE
:
4134 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
4146 static bool bond_addr_in_mc_list(unsigned char *addr
,
4147 struct netdev_hw_addr_list
*list
,
4150 struct netdev_hw_addr
*ha
;
4152 netdev_hw_addr_list_for_each(ha
, list
)
4153 if (!memcmp(ha
->addr
, addr
, addrlen
))
4159 static void bond_set_multicast_list(struct net_device
*bond_dev
)
4161 struct bonding
*bond
= netdev_priv(bond_dev
);
4162 struct netdev_hw_addr
*ha
;
4166 * Do promisc before checking multicast_mode
4168 if ((bond_dev
->flags
& IFF_PROMISC
) && !(bond
->flags
& IFF_PROMISC
))
4170 * FIXME: Need to handle the error when one of the multi-slaves
4173 bond_set_promiscuity(bond
, 1);
4176 if (!(bond_dev
->flags
& IFF_PROMISC
) && (bond
->flags
& IFF_PROMISC
))
4177 bond_set_promiscuity(bond
, -1);
4180 /* set allmulti flag to slaves */
4181 if ((bond_dev
->flags
& IFF_ALLMULTI
) && !(bond
->flags
& IFF_ALLMULTI
))
4183 * FIXME: Need to handle the error when one of the multi-slaves
4186 bond_set_allmulti(bond
, 1);
4189 if (!(bond_dev
->flags
& IFF_ALLMULTI
) && (bond
->flags
& IFF_ALLMULTI
))
4190 bond_set_allmulti(bond
, -1);
4193 read_lock(&bond
->lock
);
4195 bond
->flags
= bond_dev
->flags
;
4197 /* looking for addresses to add to slaves' mc list */
4198 netdev_for_each_mc_addr(ha
, bond_dev
) {
4199 found
= bond_addr_in_mc_list(ha
->addr
, &bond
->mc_list
,
4200 bond_dev
->addr_len
);
4202 bond_mc_add(bond
, ha
->addr
);
4205 /* looking for addresses to delete from slaves' list */
4206 netdev_hw_addr_list_for_each(ha
, &bond
->mc_list
) {
4207 found
= bond_addr_in_mc_list(ha
->addr
, &bond_dev
->mc
,
4208 bond_dev
->addr_len
);
4210 bond_mc_del(bond
, ha
->addr
);
4213 /* save master's multicast list */
4214 __hw_addr_flush(&bond
->mc_list
);
4215 __hw_addr_add_multiple(&bond
->mc_list
, &bond_dev
->mc
,
4216 bond_dev
->addr_len
, NETDEV_HW_ADDR_T_MULTICAST
);
4218 read_unlock(&bond
->lock
);
4221 static int bond_neigh_setup(struct net_device
*dev
, struct neigh_parms
*parms
)
4223 struct bonding
*bond
= netdev_priv(dev
);
4224 struct slave
*slave
= bond
->first_slave
;
4227 const struct net_device_ops
*slave_ops
4228 = slave
->dev
->netdev_ops
;
4229 if (slave_ops
->ndo_neigh_setup
)
4230 return slave_ops
->ndo_neigh_setup(slave
->dev
, parms
);
4236 * Change the MTU of all of a master's slaves to match the master
4238 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
4240 struct bonding
*bond
= netdev_priv(bond_dev
);
4241 struct slave
*slave
, *stop_at
;
4245 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond
,
4246 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
4248 /* Can't hold bond->lock with bh disabled here since
4249 * some base drivers panic. On the other hand we can't
4250 * hold bond->lock without bh disabled because we'll
4251 * deadlock. The only solution is to rely on the fact
4252 * that we're under rtnl_lock here, and the slaves
4253 * list won't change. This doesn't solve the problem
4254 * of setting the slave's MTU while it is
4255 * transmitting, but the assumption is that the base
4256 * driver can handle that.
4258 * TODO: figure out a way to safely iterate the slaves
4259 * list, but without holding a lock around the actual
4260 * call to the base driver.
4263 bond_for_each_slave(bond
, slave
, i
) {
4264 pr_debug("s %p s->p %p c_m %p\n",
4267 slave
->dev
->netdev_ops
->ndo_change_mtu
);
4269 res
= dev_set_mtu(slave
->dev
, new_mtu
);
4272 /* If we failed to set the slave's mtu to the new value
4273 * we must abort the operation even in ACTIVE_BACKUP
4274 * mode, because if we allow the backup slaves to have
4275 * different mtu values than the active slave we'll
4276 * need to change their mtu when doing a failover. That
4277 * means changing their mtu from timer context, which
4278 * is probably not a good idea.
4280 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
4285 bond_dev
->mtu
= new_mtu
;
4290 /* unwind from head to the slave that failed */
4292 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
4295 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
4297 pr_debug("unwind err %d dev %s\n",
4298 tmp_res
, slave
->dev
->name
);
4308 * Note that many devices must be down to change the HW address, and
4309 * downing the master releases all slaves. We can make bonds full of
4310 * bonding devices to test this, however.
4312 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
4314 struct bonding
*bond
= netdev_priv(bond_dev
);
4315 struct sockaddr
*sa
= addr
, tmp_sa
;
4316 struct slave
*slave
, *stop_at
;
4320 if (bond
->params
.mode
== BOND_MODE_ALB
)
4321 return bond_alb_set_mac_address(bond_dev
, addr
);
4324 pr_debug("bond=%p, name=%s\n",
4325 bond
, bond_dev
? bond_dev
->name
: "None");
4328 * If fail_over_mac is set to active, do nothing and return
4329 * success. Returning an error causes ifenslave to fail.
4331 if (bond
->params
.fail_over_mac
== BOND_FOM_ACTIVE
)
4334 if (!is_valid_ether_addr(sa
->sa_data
))
4335 return -EADDRNOTAVAIL
;
4337 /* Can't hold bond->lock with bh disabled here since
4338 * some base drivers panic. On the other hand we can't
4339 * hold bond->lock without bh disabled because we'll
4340 * deadlock. The only solution is to rely on the fact
4341 * that we're under rtnl_lock here, and the slaves
4342 * list won't change. This doesn't solve the problem
4343 * of setting the slave's hw address while it is
4344 * transmitting, but the assumption is that the base
4345 * driver can handle that.
4347 * TODO: figure out a way to safely iterate the slaves
4348 * list, but without holding a lock around the actual
4349 * call to the base driver.
4352 bond_for_each_slave(bond
, slave
, i
) {
4353 const struct net_device_ops
*slave_ops
= slave
->dev
->netdev_ops
;
4354 pr_debug("slave %p %s\n", slave
, slave
->dev
->name
);
4356 if (slave_ops
->ndo_set_mac_address
== NULL
) {
4358 pr_debug("EOPNOTSUPP %s\n", slave
->dev
->name
);
4362 res
= dev_set_mac_address(slave
->dev
, addr
);
4364 /* TODO: consider downing the slave
4366 * User should expect communications
4367 * breakage anyway until ARP finish
4370 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
4376 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
4380 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
4381 tmp_sa
.sa_family
= bond_dev
->type
;
4383 /* unwind from head to the slave that failed */
4385 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
4388 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
4390 pr_debug("unwind err %d dev %s\n",
4391 tmp_res
, slave
->dev
->name
);
4398 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4400 struct bonding
*bond
= netdev_priv(bond_dev
);
4401 struct slave
*slave
, *start_at
;
4402 int i
, slave_no
, res
= 1;
4403 struct iphdr
*iph
= ip_hdr(skb
);
4405 read_lock(&bond
->lock
);
4407 if (!BOND_IS_OK(bond
))
4410 * Start with the curr_active_slave that joined the bond as the
4411 * default for sending IGMP traffic. For failover purposes one
4412 * needs to maintain some consistency for the interface that will
4413 * send the join/membership reports. The curr_active_slave found
4414 * will send all of this type of traffic.
4416 if ((iph
->protocol
== IPPROTO_IGMP
) &&
4417 (skb
->protocol
== htons(ETH_P_IP
))) {
4419 read_lock(&bond
->curr_slave_lock
);
4420 slave
= bond
->curr_active_slave
;
4421 read_unlock(&bond
->curr_slave_lock
);
4427 * Concurrent TX may collide on rr_tx_counter; we accept
4428 * that as being rare enough not to justify using an
4431 slave_no
= bond
->rr_tx_counter
++ % bond
->slave_cnt
;
4433 bond_for_each_slave(bond
, slave
, i
) {
4441 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4442 if (IS_UP(slave
->dev
) &&
4443 (slave
->link
== BOND_LINK_UP
) &&
4444 (slave
->state
== BOND_STATE_ACTIVE
)) {
4445 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4452 /* no suitable interface, frame not sent */
4455 read_unlock(&bond
->lock
);
4456 return NETDEV_TX_OK
;
4461 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4462 * the bond has a usable interface.
4464 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4466 struct bonding
*bond
= netdev_priv(bond_dev
);
4469 read_lock(&bond
->lock
);
4470 read_lock(&bond
->curr_slave_lock
);
4472 if (!BOND_IS_OK(bond
))
4475 if (!bond
->curr_active_slave
)
4478 res
= bond_dev_queue_xmit(bond
, skb
, bond
->curr_active_slave
->dev
);
4482 /* no suitable interface, frame not sent */
4485 read_unlock(&bond
->curr_slave_lock
);
4486 read_unlock(&bond
->lock
);
4487 return NETDEV_TX_OK
;
4491 * In bond_xmit_xor() , we determine the output device by using a pre-
4492 * determined xmit_hash_policy(), If the selected device is not enabled,
4493 * find the next active slave.
4495 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4497 struct bonding
*bond
= netdev_priv(bond_dev
);
4498 struct slave
*slave
, *start_at
;
4503 read_lock(&bond
->lock
);
4505 if (!BOND_IS_OK(bond
))
4508 slave_no
= bond
->xmit_hash_policy(skb
, bond
->slave_cnt
);
4510 bond_for_each_slave(bond
, slave
, i
) {
4518 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4519 if (IS_UP(slave
->dev
) &&
4520 (slave
->link
== BOND_LINK_UP
) &&
4521 (slave
->state
== BOND_STATE_ACTIVE
)) {
4522 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4529 /* no suitable interface, frame not sent */
4532 read_unlock(&bond
->lock
);
4533 return NETDEV_TX_OK
;
4537 * in broadcast mode, we send everything to all usable interfaces.
4539 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4541 struct bonding
*bond
= netdev_priv(bond_dev
);
4542 struct slave
*slave
, *start_at
;
4543 struct net_device
*tx_dev
= NULL
;
4547 read_lock(&bond
->lock
);
4549 if (!BOND_IS_OK(bond
))
4552 read_lock(&bond
->curr_slave_lock
);
4553 start_at
= bond
->curr_active_slave
;
4554 read_unlock(&bond
->curr_slave_lock
);
4559 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4560 if (IS_UP(slave
->dev
) &&
4561 (slave
->link
== BOND_LINK_UP
) &&
4562 (slave
->state
== BOND_STATE_ACTIVE
)) {
4564 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4566 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4571 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4573 dev_kfree_skb(skb2
);
4577 tx_dev
= slave
->dev
;
4582 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4586 /* no suitable interface, frame not sent */
4589 /* frame sent to all suitable interfaces */
4590 read_unlock(&bond
->lock
);
4591 return NETDEV_TX_OK
;
4594 /*------------------------- Device initialization ---------------------------*/
4596 static void bond_set_xmit_hash_policy(struct bonding
*bond
)
4598 switch (bond
->params
.xmit_policy
) {
4599 case BOND_XMIT_POLICY_LAYER23
:
4600 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l23
;
4602 case BOND_XMIT_POLICY_LAYER34
:
4603 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4605 case BOND_XMIT_POLICY_LAYER2
:
4607 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4613 * Lookup the slave that corresponds to a qid
4615 static inline int bond_slave_override(struct bonding
*bond
,
4616 struct sk_buff
*skb
)
4619 struct slave
*slave
= NULL
;
4620 struct slave
*check_slave
;
4622 read_lock(&bond
->lock
);
4624 if (!BOND_IS_OK(bond
) || !skb
->queue_mapping
)
4627 /* Find out if any slaves have the same mapping as this skb. */
4628 bond_for_each_slave(bond
, check_slave
, i
) {
4629 if (check_slave
->queue_id
== skb
->queue_mapping
) {
4630 slave
= check_slave
;
4635 /* If the slave isn't UP, use default transmit policy. */
4636 if (slave
&& slave
->queue_id
&& IS_UP(slave
->dev
) &&
4637 (slave
->link
== BOND_LINK_UP
)) {
4638 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4642 read_unlock(&bond
->lock
);
4646 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
)
4649 * This helper function exists to help dev_pick_tx get the correct
4650 * destination queue. Using a helper function skips the a call to
4651 * skb_tx_hash and will put the skbs in the queue we expect on their
4652 * way down to the bonding driver.
4654 return skb
->queue_mapping
;
4657 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4659 struct bonding
*bond
= netdev_priv(dev
);
4662 * If we risk deadlock from transmitting this in the
4663 * netpoll path, tell netpoll to queue the frame for later tx
4665 if (is_netpoll_tx_blocked(dev
))
4666 return NETDEV_TX_BUSY
;
4668 if (TX_QUEUE_OVERRIDE(bond
->params
.mode
)) {
4669 if (!bond_slave_override(bond
, skb
))
4670 return NETDEV_TX_OK
;
4673 switch (bond
->params
.mode
) {
4674 case BOND_MODE_ROUNDROBIN
:
4675 return bond_xmit_roundrobin(skb
, dev
);
4676 case BOND_MODE_ACTIVEBACKUP
:
4677 return bond_xmit_activebackup(skb
, dev
);
4679 return bond_xmit_xor(skb
, dev
);
4680 case BOND_MODE_BROADCAST
:
4681 return bond_xmit_broadcast(skb
, dev
);
4682 case BOND_MODE_8023AD
:
4683 return bond_3ad_xmit_xor(skb
, dev
);
4686 return bond_alb_xmit(skb
, dev
);
4688 /* Should never happen, mode already checked */
4689 pr_err("%s: Error: Unknown bonding mode %d\n",
4690 dev
->name
, bond
->params
.mode
);
4693 return NETDEV_TX_OK
;
4699 * set bond mode specific net device operations
4701 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4703 struct net_device
*bond_dev
= bond
->dev
;
4706 case BOND_MODE_ROUNDROBIN
:
4708 case BOND_MODE_ACTIVEBACKUP
:
4711 bond_set_xmit_hash_policy(bond
);
4713 case BOND_MODE_BROADCAST
:
4715 case BOND_MODE_8023AD
:
4716 bond_set_master_3ad_flags(bond
);
4717 bond_set_xmit_hash_policy(bond
);
4720 bond_set_master_alb_flags(bond
);
4725 /* Should never happen, mode already checked */
4726 pr_err("%s: Error: Unknown bonding mode %d\n",
4727 bond_dev
->name
, mode
);
4732 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4733 struct ethtool_drvinfo
*drvinfo
)
4735 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4736 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4737 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4740 static const struct ethtool_ops bond_ethtool_ops
= {
4741 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4742 .get_link
= ethtool_op_get_link
,
4743 .get_tx_csum
= ethtool_op_get_tx_csum
,
4744 .get_sg
= ethtool_op_get_sg
,
4745 .get_tso
= ethtool_op_get_tso
,
4746 .get_ufo
= ethtool_op_get_ufo
,
4747 .get_flags
= ethtool_op_get_flags
,
4750 static const struct net_device_ops bond_netdev_ops
= {
4751 .ndo_init
= bond_init
,
4752 .ndo_uninit
= bond_uninit
,
4753 .ndo_open
= bond_open
,
4754 .ndo_stop
= bond_close
,
4755 .ndo_start_xmit
= bond_start_xmit
,
4756 .ndo_select_queue
= bond_select_queue
,
4757 .ndo_get_stats64
= bond_get_stats
,
4758 .ndo_do_ioctl
= bond_do_ioctl
,
4759 .ndo_set_multicast_list
= bond_set_multicast_list
,
4760 .ndo_change_mtu
= bond_change_mtu
,
4761 .ndo_set_mac_address
= bond_set_mac_address
,
4762 .ndo_neigh_setup
= bond_neigh_setup
,
4763 .ndo_vlan_rx_register
= bond_vlan_rx_register
,
4764 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
4765 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
4766 #ifdef CONFIG_NET_POLL_CONTROLLER
4767 .ndo_netpoll_setup
= bond_netpoll_setup
,
4768 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
4769 .ndo_poll_controller
= bond_poll_controller
,
4771 .ndo_add_slave
= bond_enslave
,
4772 .ndo_del_slave
= bond_release
,
4775 static void bond_destructor(struct net_device
*bond_dev
)
4777 struct bonding
*bond
= netdev_priv(bond_dev
);
4779 destroy_workqueue(bond
->wq
);
4780 free_netdev(bond_dev
);
4783 static void bond_setup(struct net_device
*bond_dev
)
4785 struct bonding
*bond
= netdev_priv(bond_dev
);
4787 /* initialize rwlocks */
4788 rwlock_init(&bond
->lock
);
4789 rwlock_init(&bond
->curr_slave_lock
);
4791 bond
->params
= bonding_defaults
;
4793 /* Initialize pointers */
4794 bond
->dev
= bond_dev
;
4795 INIT_LIST_HEAD(&bond
->vlan_list
);
4797 /* Initialize the device entry points */
4798 ether_setup(bond_dev
);
4799 bond_dev
->netdev_ops
= &bond_netdev_ops
;
4800 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4801 bond_set_mode_ops(bond
, bond
->params
.mode
);
4803 bond_dev
->destructor
= bond_destructor
;
4805 /* Initialize the device options */
4806 bond_dev
->tx_queue_len
= 0;
4807 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4808 bond_dev
->priv_flags
|= IFF_BONDING
;
4809 bond_dev
->priv_flags
&= ~IFF_XMIT_DST_RELEASE
;
4811 if (bond
->params
.arp_interval
)
4812 bond_dev
->priv_flags
|= IFF_MASTER_ARPMON
;
4814 /* At first, we block adding VLANs. That's the only way to
4815 * prevent problems that occur when adding VLANs over an
4816 * empty bond. The block will be removed once non-challenged
4817 * slaves are enslaved.
4819 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4821 /* don't acquire bond device's netif_tx_lock when
4823 bond_dev
->features
|= NETIF_F_LLTX
;
4825 /* By default, we declare the bond to be fully
4826 * VLAN hardware accelerated capable. Special
4827 * care is taken in the various xmit functions
4828 * when there are slaves that are not hw accel
4831 bond_dev
->features
|= (NETIF_F_HW_VLAN_TX
|
4832 NETIF_F_HW_VLAN_RX
|
4833 NETIF_F_HW_VLAN_FILTER
);
4835 /* By default, we enable GRO on bonding devices.
4836 * Actual support requires lowlevel drivers are GRO ready.
4838 bond_dev
->features
|= NETIF_F_GRO
;
4841 static void bond_work_cancel_all(struct bonding
*bond
)
4843 write_lock_bh(&bond
->lock
);
4844 bond
->kill_timers
= 1;
4845 write_unlock_bh(&bond
->lock
);
4847 if (bond
->params
.miimon
&& delayed_work_pending(&bond
->mii_work
))
4848 cancel_delayed_work(&bond
->mii_work
);
4850 if (bond
->params
.arp_interval
&& delayed_work_pending(&bond
->arp_work
))
4851 cancel_delayed_work(&bond
->arp_work
);
4853 if (bond
->params
.mode
== BOND_MODE_ALB
&&
4854 delayed_work_pending(&bond
->alb_work
))
4855 cancel_delayed_work(&bond
->alb_work
);
4857 if (bond
->params
.mode
== BOND_MODE_8023AD
&&
4858 delayed_work_pending(&bond
->ad_work
))
4859 cancel_delayed_work(&bond
->ad_work
);
4861 if (delayed_work_pending(&bond
->mcast_work
))
4862 cancel_delayed_work(&bond
->mcast_work
);
4866 * Destroy a bonding device.
4867 * Must be under rtnl_lock when this function is called.
4869 static void bond_uninit(struct net_device
*bond_dev
)
4871 struct bonding
*bond
= netdev_priv(bond_dev
);
4872 struct vlan_entry
*vlan
, *tmp
;
4874 bond_netpoll_cleanup(bond_dev
);
4876 /* Release the bonded slaves */
4877 bond_release_all(bond_dev
);
4879 list_del(&bond
->bond_list
);
4881 bond_work_cancel_all(bond
);
4883 bond_remove_proc_entry(bond
);
4885 bond_debug_unregister(bond
);
4887 __hw_addr_flush(&bond
->mc_list
);
4889 list_for_each_entry_safe(vlan
, tmp
, &bond
->vlan_list
, vlan_list
) {
4890 list_del(&vlan
->vlan_list
);
4895 /*------------------------- Module initialization ---------------------------*/
4898 * Convert string input module parms. Accept either the
4899 * number of the mode or its string name. A bit complicated because
4900 * some mode names are substrings of other names, and calls from sysfs
4901 * may have whitespace in the name (trailing newlines, for example).
4903 int bond_parse_parm(const char *buf
, const struct bond_parm_tbl
*tbl
)
4905 int modeint
= -1, i
, rv
;
4906 char *p
, modestr
[BOND_MAX_MODENAME_LEN
+ 1] = { 0, };
4908 for (p
= (char *)buf
; *p
; p
++)
4909 if (!(isdigit(*p
) || isspace(*p
)))
4913 rv
= sscanf(buf
, "%20s", modestr
);
4915 rv
= sscanf(buf
, "%d", &modeint
);
4920 for (i
= 0; tbl
[i
].modename
; i
++) {
4921 if (modeint
== tbl
[i
].mode
)
4923 if (strcmp(modestr
, tbl
[i
].modename
) == 0)
4930 static int bond_check_params(struct bond_params
*params
)
4932 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
;
4935 * Convert string parameters.
4938 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4939 if (bond_mode
== -1) {
4940 pr_err("Error: Invalid bonding mode \"%s\"\n",
4941 mode
== NULL
? "NULL" : mode
);
4946 if (xmit_hash_policy
) {
4947 if ((bond_mode
!= BOND_MODE_XOR
) &&
4948 (bond_mode
!= BOND_MODE_8023AD
)) {
4949 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4950 bond_mode_name(bond_mode
));
4952 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4954 if (xmit_hashtype
== -1) {
4955 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4956 xmit_hash_policy
== NULL
? "NULL" :
4964 if (bond_mode
!= BOND_MODE_8023AD
) {
4965 pr_info("lacp_rate param is irrelevant in mode %s\n",
4966 bond_mode_name(bond_mode
));
4968 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4969 if (lacp_fast
== -1) {
4970 pr_err("Error: Invalid lacp rate \"%s\"\n",
4971 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4978 params
->ad_select
= bond_parse_parm(ad_select
, ad_select_tbl
);
4979 if (params
->ad_select
== -1) {
4980 pr_err("Error: Invalid ad_select \"%s\"\n",
4981 ad_select
== NULL
? "NULL" : ad_select
);
4985 if (bond_mode
!= BOND_MODE_8023AD
) {
4986 pr_warning("ad_select param only affects 802.3ad mode\n");
4989 params
->ad_select
= BOND_AD_STABLE
;
4992 if (max_bonds
< 0) {
4993 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4994 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4995 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4999 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
5000 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
5001 miimon
= BOND_LINK_MON_INTERV
;
5005 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
5010 if (downdelay
< 0) {
5011 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
5012 downdelay
, INT_MAX
);
5016 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
5017 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
5022 if (num_grat_arp
< 0 || num_grat_arp
> 255) {
5023 pr_warning("Warning: num_grat_arp (%d) not in range 0-255 so it was reset to 1\n",
5028 if (num_unsol_na
< 0 || num_unsol_na
> 255) {
5029 pr_warning("Warning: num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
5034 /* reset values for 802.3ad */
5035 if (bond_mode
== BOND_MODE_8023AD
) {
5037 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
5038 pr_warning("Forcing miimon to 100msec\n");
5043 if (tx_queues
< 1 || tx_queues
> 255) {
5044 pr_warning("Warning: tx_queues (%d) should be between "
5045 "1 and 255, resetting to %d\n",
5046 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
5047 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
5050 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
5051 pr_warning("Warning: all_slaves_active module parameter (%d), "
5052 "not of valid value (0/1), so it was set to "
5053 "0\n", all_slaves_active
);
5054 all_slaves_active
= 0;
5057 if (resend_igmp
< 0 || resend_igmp
> 255) {
5058 pr_warning("Warning: resend_igmp (%d) should be between "
5059 "0 and 255, resetting to %d\n",
5060 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
5061 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
5064 /* reset values for TLB/ALB */
5065 if ((bond_mode
== BOND_MODE_TLB
) ||
5066 (bond_mode
== BOND_MODE_ALB
)) {
5068 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure and link speed which are essential for TLB/ALB load balancing\n");
5069 pr_warning("Forcing miimon to 100msec\n");
5074 if (bond_mode
== BOND_MODE_ALB
) {
5075 pr_notice("In ALB mode you might experience client disconnections upon reconnection of a link if the bonding module updelay parameter (%d msec) is incompatible with the forwarding delay time of the switch\n",
5080 if (updelay
|| downdelay
) {
5081 /* just warn the user the up/down delay will have
5082 * no effect since miimon is zero...
5084 pr_warning("Warning: miimon module parameter not set and updelay (%d) or downdelay (%d) module parameter is set; updelay and downdelay have no effect unless miimon is set\n",
5085 updelay
, downdelay
);
5088 /* don't allow arp monitoring */
5090 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
5091 miimon
, arp_interval
);
5095 if ((updelay
% miimon
) != 0) {
5096 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
5098 (updelay
/ miimon
) * miimon
);
5103 if ((downdelay
% miimon
) != 0) {
5104 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
5106 (downdelay
/ miimon
) * miimon
);
5109 downdelay
/= miimon
;
5112 if (arp_interval
< 0) {
5113 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
5114 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
5115 arp_interval
= BOND_LINK_ARP_INTERV
;
5118 for (arp_ip_count
= 0;
5119 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
5121 /* not complete check, but should be good enough to
5123 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
5124 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
5125 arp_ip_target
[arp_ip_count
]);
5128 __be32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
5129 arp_target
[arp_ip_count
] = ip
;
5133 if (arp_interval
&& !arp_ip_count
) {
5134 /* don't allow arping if no arp_ip_target given... */
5135 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
5141 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
5142 pr_err("arp_validate only supported in active-backup mode\n");
5145 if (!arp_interval
) {
5146 pr_err("arp_validate requires arp_interval\n");
5150 arp_validate_value
= bond_parse_parm(arp_validate
,
5152 if (arp_validate_value
== -1) {
5153 pr_err("Error: invalid arp_validate \"%s\"\n",
5154 arp_validate
== NULL
? "NULL" : arp_validate
);
5158 arp_validate_value
= 0;
5161 pr_info("MII link monitoring set to %d ms\n", miimon
);
5162 } else if (arp_interval
) {
5165 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
5167 arp_validate_tbl
[arp_validate_value
].modename
,
5170 for (i
= 0; i
< arp_ip_count
; i
++)
5171 pr_info(" %s", arp_ip_target
[i
]);
5175 } else if (max_bonds
) {
5176 /* miimon and arp_interval not set, we need one so things
5177 * work as expected, see bonding.txt for details
5179 pr_warning("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.\n");
5182 if (primary
&& !USES_PRIMARY(bond_mode
)) {
5183 /* currently, using a primary only makes sense
5184 * in active backup, TLB or ALB modes
5186 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
5187 primary
, bond_mode_name(bond_mode
));
5191 if (primary
&& primary_reselect
) {
5192 primary_reselect_value
= bond_parse_parm(primary_reselect
,
5194 if (primary_reselect_value
== -1) {
5195 pr_err("Error: Invalid primary_reselect \"%s\"\n",
5197 NULL
? "NULL" : primary_reselect
);
5201 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
5204 if (fail_over_mac
) {
5205 fail_over_mac_value
= bond_parse_parm(fail_over_mac
,
5207 if (fail_over_mac_value
== -1) {
5208 pr_err("Error: invalid fail_over_mac \"%s\"\n",
5209 arp_validate
== NULL
? "NULL" : arp_validate
);
5213 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
5214 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
5216 fail_over_mac_value
= BOND_FOM_NONE
;
5219 /* fill params struct with the proper values */
5220 params
->mode
= bond_mode
;
5221 params
->xmit_policy
= xmit_hashtype
;
5222 params
->miimon
= miimon
;
5223 params
->num_grat_arp
= num_grat_arp
;
5224 params
->num_unsol_na
= num_unsol_na
;
5225 params
->arp_interval
= arp_interval
;
5226 params
->arp_validate
= arp_validate_value
;
5227 params
->updelay
= updelay
;
5228 params
->downdelay
= downdelay
;
5229 params
->use_carrier
= use_carrier
;
5230 params
->lacp_fast
= lacp_fast
;
5231 params
->primary
[0] = 0;
5232 params
->primary_reselect
= primary_reselect_value
;
5233 params
->fail_over_mac
= fail_over_mac_value
;
5234 params
->tx_queues
= tx_queues
;
5235 params
->all_slaves_active
= all_slaves_active
;
5236 params
->resend_igmp
= resend_igmp
;
5239 strncpy(params
->primary
, primary
, IFNAMSIZ
);
5240 params
->primary
[IFNAMSIZ
- 1] = 0;
5243 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
5248 static struct lock_class_key bonding_netdev_xmit_lock_key
;
5249 static struct lock_class_key bonding_netdev_addr_lock_key
;
5251 static void bond_set_lockdep_class_one(struct net_device
*dev
,
5252 struct netdev_queue
*txq
,
5255 lockdep_set_class(&txq
->_xmit_lock
,
5256 &bonding_netdev_xmit_lock_key
);
5259 static void bond_set_lockdep_class(struct net_device
*dev
)
5261 lockdep_set_class(&dev
->addr_list_lock
,
5262 &bonding_netdev_addr_lock_key
);
5263 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
5267 * Called from registration process
5269 static int bond_init(struct net_device
*bond_dev
)
5271 struct bonding
*bond
= netdev_priv(bond_dev
);
5272 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
5274 pr_debug("Begin bond_init for %s\n", bond_dev
->name
);
5276 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
5280 bond_set_lockdep_class(bond_dev
);
5282 netif_carrier_off(bond_dev
);
5284 bond_create_proc_entry(bond
);
5285 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
5287 bond_prepare_sysfs_group(bond
);
5289 bond_debug_register(bond
);
5291 __hw_addr_init(&bond
->mc_list
);
5295 static int bond_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
5297 if (tb
[IFLA_ADDRESS
]) {
5298 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
5300 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
5301 return -EADDRNOTAVAIL
;
5306 static struct rtnl_link_ops bond_link_ops __read_mostly
= {
5308 .priv_size
= sizeof(struct bonding
),
5309 .setup
= bond_setup
,
5310 .validate
= bond_validate
,
5313 /* Create a new bond based on the specified name and bonding parameters.
5314 * If name is NULL, obtain a suitable "bond%d" name for us.
5315 * Caller must NOT hold rtnl_lock; we need to release it here before we
5316 * set up our sysfs entries.
5318 int bond_create(struct net
*net
, const char *name
)
5320 struct net_device
*bond_dev
;
5325 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
), name
? name
: "",
5326 bond_setup
, tx_queues
);
5328 pr_err("%s: eek! can't alloc netdev!\n", name
);
5333 dev_net_set(bond_dev
, net
);
5334 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
5337 res
= dev_alloc_name(bond_dev
, "bond%d");
5342 * If we're given a name to register
5343 * we need to ensure that its not already
5347 if (__dev_get_by_name(net
, name
) != NULL
)
5351 res
= register_netdevice(bond_dev
);
5356 bond_destructor(bond_dev
);
5360 static int __net_init
bond_net_init(struct net
*net
)
5362 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
5365 INIT_LIST_HEAD(&bn
->dev_list
);
5367 bond_create_proc_dir(bn
);
5372 static void __net_exit
bond_net_exit(struct net
*net
)
5374 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
5376 bond_destroy_proc_dir(bn
);
5379 static struct pernet_operations bond_net_ops
= {
5380 .init
= bond_net_init
,
5381 .exit
= bond_net_exit
,
5383 .size
= sizeof(struct bond_net
),
5386 static int __init
bonding_init(void)
5391 pr_info("%s", version
);
5393 res
= bond_check_params(&bonding_defaults
);
5397 res
= register_pernet_subsys(&bond_net_ops
);
5401 res
= rtnl_link_register(&bond_link_ops
);
5405 bond_create_debugfs();
5407 for (i
= 0; i
< max_bonds
; i
++) {
5408 res
= bond_create(&init_net
, NULL
);
5413 res
= bond_create_sysfs();
5417 register_netdevice_notifier(&bond_netdev_notifier
);
5418 register_inetaddr_notifier(&bond_inetaddr_notifier
);
5419 bond_register_ipv6_notifier();
5423 rtnl_link_unregister(&bond_link_ops
);
5425 unregister_pernet_subsys(&bond_net_ops
);
5430 static void __exit
bonding_exit(void)
5432 unregister_netdevice_notifier(&bond_netdev_notifier
);
5433 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
5434 bond_unregister_ipv6_notifier();
5436 bond_destroy_sysfs();
5437 bond_destroy_debugfs();
5439 rtnl_link_unregister(&bond_link_ops
);
5440 unregister_pernet_subsys(&bond_net_ops
);
5442 #ifdef CONFIG_NET_POLL_CONTROLLER
5444 * Make sure we don't have an imbalance on our netpoll blocking
5446 WARN_ON(atomic_read(&netpoll_block_tx
));
5450 module_init(bonding_init
);
5451 module_exit(bonding_exit
);
5452 MODULE_LICENSE("GPL");
5453 MODULE_VERSION(DRV_VERSION
);
5454 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
5455 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5456 MODULE_ALIAS_RTNL_LINK("bond");