3 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 * The full GNU General Public License is included in this distribution in the
20 * file called LICENSE.
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/device.h>
26 #include <linux/sysdev.h>
28 #include <linux/types.h>
29 #include <linux/string.h>
30 #include <linux/netdevice.h>
31 #include <linux/inetdevice.h>
33 #include <linux/sysfs.h>
34 #include <linux/ctype.h>
35 #include <linux/inet.h>
36 #include <linux/rtnetlink.h>
37 #include <net/net_namespace.h>
39 /* #define BONDING_DEBUG 1 */
41 #define to_dev(obj) container_of(obj,struct device,kobj)
42 #define to_bond(cd) ((struct bonding *)(to_net_dev(cd)->priv))
44 /*---------------------------- Declarations -------------------------------*/
47 extern struct list_head bond_dev_list
;
48 extern struct bond_params bonding_defaults
;
49 extern struct bond_parm_tbl bond_mode_tbl
[];
50 extern struct bond_parm_tbl bond_lacp_tbl
[];
51 extern struct bond_parm_tbl xmit_hashtype_tbl
[];
52 extern struct bond_parm_tbl arp_validate_tbl
[];
53 extern struct bond_parm_tbl fail_over_mac_tbl
[];
55 static int expected_refcount
= -1;
56 /*--------------------------- Data Structures -----------------------------*/
58 /* Bonding sysfs lock. Why can't we just use the subsystem lock?
59 * Because kobject_register tries to acquire the subsystem lock. If
60 * we already hold the lock (which we would if the user was creating
61 * a new bond through the sysfs interface), we deadlock.
62 * This lock is only needed when deleting a bond - we need to make sure
63 * that we don't collide with an ongoing ioctl.
66 struct rw_semaphore bonding_rwsem
;
71 /*------------------------------ Functions --------------------------------*/
74 * "show" function for the bond_masters attribute.
75 * The class parameter is ignored.
77 static ssize_t
bonding_show_bonds(struct class *cls
, char *buf
)
82 down_read(&(bonding_rwsem
));
84 list_for_each_entry(bond
, &bond_dev_list
, bond_list
) {
85 if (res
> (PAGE_SIZE
- IFNAMSIZ
)) {
86 /* not enough space for another interface name */
87 if ((PAGE_SIZE
- res
) > 10)
89 res
+= sprintf(buf
+ res
, "++more++ ");
92 res
+= sprintf(buf
+ res
, "%s ", bond
->dev
->name
);
95 buf
[res
-1] = '\n'; /* eat the leftover space */
96 up_read(&(bonding_rwsem
));
101 * "store" function for the bond_masters attribute. This is what
102 * creates and deletes entire bonds.
104 * The class parameter is ignored.
108 static ssize_t
bonding_store_bonds(struct class *cls
, const char *buffer
, size_t count
)
110 char command
[IFNAMSIZ
+ 1] = {0, };
113 struct bonding
*bond
;
115 sscanf(buffer
, "%16s", command
); /* IFNAMSIZ*/
116 ifname
= command
+ 1;
117 if ((strlen(command
) <= 1) ||
118 !dev_valid_name(ifname
))
121 if (command
[0] == '+') {
122 printk(KERN_INFO DRV_NAME
123 ": %s is being created...\n", ifname
);
124 rv
= bond_create(ifname
, &bonding_defaults
);
126 printk(KERN_INFO DRV_NAME
": Bond creation failed.\n");
132 if (command
[0] == '-') {
134 down_write(&bonding_rwsem
);
136 list_for_each_entry(bond
, &bond_dev_list
, bond_list
)
137 if (strnicmp(bond
->dev
->name
, ifname
, IFNAMSIZ
) == 0) {
138 /* check the ref count on the bond's kobject.
139 * If it's > expected, then there's a file open,
140 * and we have to fail.
142 if (atomic_read(&bond
->dev
->dev
.kobj
.kref
.refcount
)
143 > expected_refcount
){
144 printk(KERN_INFO DRV_NAME
145 ": Unable remove bond %s due to open references.\n",
150 printk(KERN_INFO DRV_NAME
151 ": %s is being deleted...\n",
157 printk(KERN_ERR DRV_NAME
158 ": unable to delete non-existent bond %s\n", ifname
);
164 printk(KERN_ERR DRV_NAME
165 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
169 up_write(&bonding_rwsem
);
172 /* Always return either count or an error. If you return 0, you'll
173 * get called forever, which is bad.
178 /* class attribute for bond_masters file. This ends up in /sys/class/net */
179 static CLASS_ATTR(bonding_masters
, S_IWUSR
| S_IRUGO
,
180 bonding_show_bonds
, bonding_store_bonds
);
182 int bond_create_slave_symlinks(struct net_device
*master
, struct net_device
*slave
)
184 char linkname
[IFNAMSIZ
+7];
187 /* first, create a link from the slave back to the master */
188 ret
= sysfs_create_link(&(slave
->dev
.kobj
), &(master
->dev
.kobj
),
192 /* next, create a link from the master to the slave */
193 sprintf(linkname
,"slave_%s",slave
->name
);
194 ret
= sysfs_create_link(&(master
->dev
.kobj
), &(slave
->dev
.kobj
),
200 void bond_destroy_slave_symlinks(struct net_device
*master
, struct net_device
*slave
)
202 char linkname
[IFNAMSIZ
+7];
204 sysfs_remove_link(&(slave
->dev
.kobj
), "master");
205 sprintf(linkname
,"slave_%s",slave
->name
);
206 sysfs_remove_link(&(master
->dev
.kobj
), linkname
);
211 * Show the slaves in the current bond.
213 static ssize_t
bonding_show_slaves(struct device
*d
,
214 struct device_attribute
*attr
, char *buf
)
218 struct bonding
*bond
= to_bond(d
);
220 read_lock(&bond
->lock
);
221 bond_for_each_slave(bond
, slave
, i
) {
222 if (res
> (PAGE_SIZE
- IFNAMSIZ
)) {
223 /* not enough space for another interface name */
224 if ((PAGE_SIZE
- res
) > 10)
225 res
= PAGE_SIZE
- 10;
226 res
+= sprintf(buf
+ res
, "++more++ ");
229 res
+= sprintf(buf
+ res
, "%s ", slave
->dev
->name
);
231 read_unlock(&bond
->lock
);
233 buf
[res
-1] = '\n'; /* eat the leftover space */
238 * Set the slaves in the current bond. The bond interface must be
239 * up for this to succeed.
240 * This function is largely the same flow as bonding_update_bonds().
242 static ssize_t
bonding_store_slaves(struct device
*d
,
243 struct device_attribute
*attr
,
244 const char *buffer
, size_t count
)
246 char command
[IFNAMSIZ
+ 1] = { 0, };
248 int i
, res
, found
, ret
= count
;
251 struct net_device
*dev
= NULL
;
252 struct bonding
*bond
= to_bond(d
);
254 /* Quick sanity check -- is the bond interface up? */
255 if (!(bond
->dev
->flags
& IFF_UP
)) {
256 printk(KERN_WARNING DRV_NAME
257 ": %s: doing slave updates when interface is down.\n",
261 /* Note: We can't hold bond->lock here, as bond_create grabs it. */
264 down_write(&(bonding_rwsem
));
266 sscanf(buffer
, "%16s", command
); /* IFNAMSIZ*/
267 ifname
= command
+ 1;
268 if ((strlen(command
) <= 1) ||
269 !dev_valid_name(ifname
))
272 if (command
[0] == '+') {
274 /* Got a slave name in ifname. Is it already in the list? */
276 read_lock(&bond
->lock
);
277 bond_for_each_slave(bond
, slave
, i
)
278 if (strnicmp(slave
->dev
->name
, ifname
, IFNAMSIZ
) == 0) {
279 printk(KERN_ERR DRV_NAME
280 ": %s: Interface %s is already enslaved!\n",
281 bond
->dev
->name
, ifname
);
283 read_unlock(&bond
->lock
);
287 read_unlock(&bond
->lock
);
288 printk(KERN_INFO DRV_NAME
": %s: Adding slave %s.\n",
289 bond
->dev
->name
, ifname
);
290 dev
= dev_get_by_name(&init_net
, ifname
);
292 printk(KERN_INFO DRV_NAME
293 ": %s: Interface %s does not exist!\n",
294 bond
->dev
->name
, ifname
);
301 if (dev
->flags
& IFF_UP
) {
302 printk(KERN_ERR DRV_NAME
303 ": %s: Error: Unable to enslave %s "
304 "because it is already up.\n",
305 bond
->dev
->name
, dev
->name
);
309 /* If this is the first slave, then we need to set
310 the master's hardware address to be the same as the
312 if (!(*((u32
*) & (bond
->dev
->dev_addr
[0])))) {
313 memcpy(bond
->dev
->dev_addr
, dev
->dev_addr
,
317 /* Set the slave's MTU to match the bond */
318 original_mtu
= dev
->mtu
;
319 if (dev
->mtu
!= bond
->dev
->mtu
) {
320 if (dev
->change_mtu
) {
321 res
= dev
->change_mtu(dev
,
328 dev
->mtu
= bond
->dev
->mtu
;
331 res
= bond_enslave(bond
->dev
, dev
);
332 bond_for_each_slave(bond
, slave
, i
)
333 if (strnicmp(slave
->dev
->name
, ifname
, IFNAMSIZ
) == 0)
334 slave
->original_mtu
= original_mtu
;
341 if (command
[0] == '-') {
344 bond_for_each_slave(bond
, slave
, i
)
345 if (strnicmp(slave
->dev
->name
, ifname
, IFNAMSIZ
) == 0) {
347 original_mtu
= slave
->original_mtu
;
351 printk(KERN_INFO DRV_NAME
": %s: Removing slave %s\n",
352 bond
->dev
->name
, dev
->name
);
353 if (bond
->setup_by_slave
)
354 res
= bond_release_and_destroy(bond
->dev
, dev
);
356 res
= bond_release(bond
->dev
, dev
);
361 /* set the slave MTU to the default */
362 if (dev
->change_mtu
) {
363 dev
->change_mtu(dev
, original_mtu
);
365 dev
->mtu
= original_mtu
;
369 printk(KERN_ERR DRV_NAME
": unable to remove non-existent slave %s for bond %s.\n",
370 ifname
, bond
->dev
->name
);
377 printk(KERN_ERR DRV_NAME
": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond
->dev
->name
);
381 up_write(&(bonding_rwsem
));
386 static DEVICE_ATTR(slaves
, S_IRUGO
| S_IWUSR
, bonding_show_slaves
, bonding_store_slaves
);
389 * Show and set the bonding mode. The bond interface must be down to
392 static ssize_t
bonding_show_mode(struct device
*d
,
393 struct device_attribute
*attr
, char *buf
)
395 struct bonding
*bond
= to_bond(d
);
397 return sprintf(buf
, "%s %d\n",
398 bond_mode_tbl
[bond
->params
.mode
].modename
,
402 static ssize_t
bonding_store_mode(struct device
*d
,
403 struct device_attribute
*attr
,
404 const char *buf
, size_t count
)
406 int new_value
, ret
= count
;
407 struct bonding
*bond
= to_bond(d
);
409 if (bond
->dev
->flags
& IFF_UP
) {
410 printk(KERN_ERR DRV_NAME
411 ": unable to update mode of %s because interface is up.\n",
417 new_value
= bond_parse_parm(buf
, bond_mode_tbl
);
419 printk(KERN_ERR DRV_NAME
420 ": %s: Ignoring invalid mode value %.*s.\n",
422 (int)strlen(buf
) - 1, buf
);
426 if (bond
->params
.mode
== BOND_MODE_8023AD
)
427 bond_unset_master_3ad_flags(bond
);
429 if (bond
->params
.mode
== BOND_MODE_ALB
)
430 bond_unset_master_alb_flags(bond
);
432 bond
->params
.mode
= new_value
;
433 bond_set_mode_ops(bond
, bond
->params
.mode
);
434 printk(KERN_INFO DRV_NAME
": %s: setting mode to %s (%d).\n",
435 bond
->dev
->name
, bond_mode_tbl
[new_value
].modename
, new_value
);
440 static DEVICE_ATTR(mode
, S_IRUGO
| S_IWUSR
, bonding_show_mode
, bonding_store_mode
);
443 * Show and set the bonding transmit hash method. The bond interface must be down to
444 * change the xmit hash policy.
446 static ssize_t
bonding_show_xmit_hash(struct device
*d
,
447 struct device_attribute
*attr
,
450 struct bonding
*bond
= to_bond(d
);
452 return sprintf(buf
, "%s %d\n",
453 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
454 bond
->params
.xmit_policy
);
457 static ssize_t
bonding_store_xmit_hash(struct device
*d
,
458 struct device_attribute
*attr
,
459 const char *buf
, size_t count
)
461 int new_value
, ret
= count
;
462 struct bonding
*bond
= to_bond(d
);
464 if (bond
->dev
->flags
& IFF_UP
) {
465 printk(KERN_ERR DRV_NAME
466 "%s: Interface is up. Unable to update xmit policy.\n",
472 new_value
= bond_parse_parm(buf
, xmit_hashtype_tbl
);
474 printk(KERN_ERR DRV_NAME
475 ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
477 (int)strlen(buf
) - 1, buf
);
481 bond
->params
.xmit_policy
= new_value
;
482 bond_set_mode_ops(bond
, bond
->params
.mode
);
483 printk(KERN_INFO DRV_NAME
": %s: setting xmit hash policy to %s (%d).\n",
484 bond
->dev
->name
, xmit_hashtype_tbl
[new_value
].modename
, new_value
);
489 static DEVICE_ATTR(xmit_hash_policy
, S_IRUGO
| S_IWUSR
, bonding_show_xmit_hash
, bonding_store_xmit_hash
);
492 * Show and set arp_validate.
494 static ssize_t
bonding_show_arp_validate(struct device
*d
,
495 struct device_attribute
*attr
,
498 struct bonding
*bond
= to_bond(d
);
500 return sprintf(buf
, "%s %d\n",
501 arp_validate_tbl
[bond
->params
.arp_validate
].modename
,
502 bond
->params
.arp_validate
);
505 static ssize_t
bonding_store_arp_validate(struct device
*d
,
506 struct device_attribute
*attr
,
507 const char *buf
, size_t count
)
510 struct bonding
*bond
= to_bond(d
);
512 new_value
= bond_parse_parm(buf
, arp_validate_tbl
);
514 printk(KERN_ERR DRV_NAME
515 ": %s: Ignoring invalid arp_validate value %s\n",
516 bond
->dev
->name
, buf
);
519 if (new_value
&& (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
)) {
520 printk(KERN_ERR DRV_NAME
521 ": %s: arp_validate only supported in active-backup mode.\n",
525 printk(KERN_INFO DRV_NAME
": %s: setting arp_validate to %s (%d).\n",
526 bond
->dev
->name
, arp_validate_tbl
[new_value
].modename
,
529 if (!bond
->params
.arp_validate
&& new_value
) {
530 bond_register_arp(bond
);
531 } else if (bond
->params
.arp_validate
&& !new_value
) {
532 bond_unregister_arp(bond
);
535 bond
->params
.arp_validate
= new_value
;
540 static DEVICE_ATTR(arp_validate
, S_IRUGO
| S_IWUSR
, bonding_show_arp_validate
, bonding_store_arp_validate
);
543 * Show and store fail_over_mac. User only allowed to change the
544 * value when there are no slaves.
546 static ssize_t
bonding_show_fail_over_mac(struct device
*d
, struct device_attribute
*attr
, char *buf
)
548 struct bonding
*bond
= to_bond(d
);
550 return sprintf(buf
, "%s %d\n",
551 fail_over_mac_tbl
[bond
->params
.fail_over_mac
].modename
,
552 bond
->params
.fail_over_mac
);
555 static ssize_t
bonding_store_fail_over_mac(struct device
*d
, struct device_attribute
*attr
, const char *buf
, size_t count
)
558 struct bonding
*bond
= to_bond(d
);
560 if (bond
->slave_cnt
!= 0) {
561 printk(KERN_ERR DRV_NAME
562 ": %s: Can't alter fail_over_mac with slaves in bond.\n",
567 new_value
= bond_parse_parm(buf
, fail_over_mac_tbl
);
569 printk(KERN_ERR DRV_NAME
570 ": %s: Ignoring invalid fail_over_mac value %s.\n",
571 bond
->dev
->name
, buf
);
575 bond
->params
.fail_over_mac
= new_value
;
576 printk(KERN_INFO DRV_NAME
": %s: Setting fail_over_mac to %s (%d).\n",
577 bond
->dev
->name
, fail_over_mac_tbl
[new_value
].modename
,
583 static DEVICE_ATTR(fail_over_mac
, S_IRUGO
| S_IWUSR
, bonding_show_fail_over_mac
, bonding_store_fail_over_mac
);
586 * Show and set the arp timer interval. There are two tricky bits
587 * here. First, if ARP monitoring is activated, then we must disable
588 * MII monitoring. Second, if the ARP timer isn't running, we must
591 static ssize_t
bonding_show_arp_interval(struct device
*d
,
592 struct device_attribute
*attr
,
595 struct bonding
*bond
= to_bond(d
);
597 return sprintf(buf
, "%d\n", bond
->params
.arp_interval
);
600 static ssize_t
bonding_store_arp_interval(struct device
*d
,
601 struct device_attribute
*attr
,
602 const char *buf
, size_t count
)
604 int new_value
, ret
= count
;
605 struct bonding
*bond
= to_bond(d
);
607 if (sscanf(buf
, "%d", &new_value
) != 1) {
608 printk(KERN_ERR DRV_NAME
609 ": %s: no arp_interval value specified.\n",
615 printk(KERN_ERR DRV_NAME
616 ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
617 bond
->dev
->name
, new_value
, INT_MAX
);
622 printk(KERN_INFO DRV_NAME
623 ": %s: Setting ARP monitoring interval to %d.\n",
624 bond
->dev
->name
, new_value
);
625 bond
->params
.arp_interval
= new_value
;
626 if (bond
->params
.miimon
) {
627 printk(KERN_INFO DRV_NAME
628 ": %s: ARP monitoring cannot be used with MII monitoring. "
629 "%s Disabling MII monitoring.\n",
630 bond
->dev
->name
, bond
->dev
->name
);
631 bond
->params
.miimon
= 0;
632 if (delayed_work_pending(&bond
->mii_work
)) {
633 cancel_delayed_work(&bond
->mii_work
);
634 flush_workqueue(bond
->wq
);
637 if (!bond
->params
.arp_targets
[0]) {
638 printk(KERN_INFO DRV_NAME
639 ": %s: ARP monitoring has been set up, "
640 "but no ARP targets have been specified.\n",
643 if (bond
->dev
->flags
& IFF_UP
) {
644 /* If the interface is up, we may need to fire off
645 * the ARP timer. If the interface is down, the
646 * timer will get fired off when the open function
649 if (!delayed_work_pending(&bond
->arp_work
)) {
650 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
651 INIT_DELAYED_WORK(&bond
->arp_work
,
652 bond_activebackup_arp_mon
);
654 INIT_DELAYED_WORK(&bond
->arp_work
,
655 bond_loadbalance_arp_mon
);
657 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
664 static DEVICE_ATTR(arp_interval
, S_IRUGO
| S_IWUSR
, bonding_show_arp_interval
, bonding_store_arp_interval
);
667 * Show and set the arp targets.
669 static ssize_t
bonding_show_arp_targets(struct device
*d
,
670 struct device_attribute
*attr
,
674 struct bonding
*bond
= to_bond(d
);
676 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
; i
++) {
677 if (bond
->params
.arp_targets
[i
])
678 res
+= sprintf(buf
+ res
, "%u.%u.%u.%u ",
679 NIPQUAD(bond
->params
.arp_targets
[i
]));
682 buf
[res
-1] = '\n'; /* eat the leftover space */
686 static ssize_t
bonding_store_arp_targets(struct device
*d
,
687 struct device_attribute
*attr
,
688 const char *buf
, size_t count
)
691 int i
= 0, done
= 0, ret
= count
;
692 struct bonding
*bond
= to_bond(d
);
695 targets
= bond
->params
.arp_targets
;
696 newtarget
= in_aton(buf
+ 1);
699 if ((newtarget
== 0) || (newtarget
== htonl(INADDR_BROADCAST
))) {
700 printk(KERN_ERR DRV_NAME
701 ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
702 bond
->dev
->name
, NIPQUAD(newtarget
));
706 /* look for an empty slot to put the target in, and check for dupes */
707 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
708 if (targets
[i
] == newtarget
) { /* duplicate */
709 printk(KERN_ERR DRV_NAME
710 ": %s: ARP target %u.%u.%u.%u is already present\n",
711 bond
->dev
->name
, NIPQUAD(newtarget
));
717 if (targets
[i
] == 0 && !done
) {
718 printk(KERN_INFO DRV_NAME
719 ": %s: adding ARP target %d.%d.%d.%d.\n",
720 bond
->dev
->name
, NIPQUAD(newtarget
));
722 targets
[i
] = newtarget
;
726 printk(KERN_ERR DRV_NAME
727 ": %s: ARP target table is full!\n",
734 else if (buf
[0] == '-') {
735 if ((newtarget
== 0) || (newtarget
== htonl(INADDR_BROADCAST
))) {
736 printk(KERN_ERR DRV_NAME
737 ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
738 bond
->dev
->name
, NIPQUAD(newtarget
));
743 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
744 if (targets
[i
] == newtarget
) {
745 printk(KERN_INFO DRV_NAME
746 ": %s: removing ARP target %d.%d.%d.%d.\n",
747 bond
->dev
->name
, NIPQUAD(newtarget
));
753 printk(KERN_INFO DRV_NAME
754 ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
755 bond
->dev
->name
, NIPQUAD(newtarget
));
761 printk(KERN_ERR DRV_NAME
": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
770 static DEVICE_ATTR(arp_ip_target
, S_IRUGO
| S_IWUSR
, bonding_show_arp_targets
, bonding_store_arp_targets
);
773 * Show and set the up and down delays. These must be multiples of the
774 * MII monitoring value, and are stored internally as the multiplier.
775 * Thus, we must translate to MS for the real world.
777 static ssize_t
bonding_show_downdelay(struct device
*d
,
778 struct device_attribute
*attr
,
781 struct bonding
*bond
= to_bond(d
);
783 return sprintf(buf
, "%d\n", bond
->params
.downdelay
* bond
->params
.miimon
);
786 static ssize_t
bonding_store_downdelay(struct device
*d
,
787 struct device_attribute
*attr
,
788 const char *buf
, size_t count
)
790 int new_value
, ret
= count
;
791 struct bonding
*bond
= to_bond(d
);
793 if (!(bond
->params
.miimon
)) {
794 printk(KERN_ERR DRV_NAME
795 ": %s: Unable to set down delay as MII monitoring is disabled\n",
801 if (sscanf(buf
, "%d", &new_value
) != 1) {
802 printk(KERN_ERR DRV_NAME
803 ": %s: no down delay value specified.\n",
809 printk(KERN_ERR DRV_NAME
810 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
811 bond
->dev
->name
, new_value
, 1, INT_MAX
);
815 if ((new_value
% bond
->params
.miimon
) != 0) {
816 printk(KERN_WARNING DRV_NAME
817 ": %s: Warning: down delay (%d) is not a multiple "
818 "of miimon (%d), delay rounded to %d ms\n",
819 bond
->dev
->name
, new_value
, bond
->params
.miimon
,
820 (new_value
/ bond
->params
.miimon
) *
821 bond
->params
.miimon
);
823 bond
->params
.downdelay
= new_value
/ bond
->params
.miimon
;
824 printk(KERN_INFO DRV_NAME
": %s: Setting down delay to %d.\n",
825 bond
->dev
->name
, bond
->params
.downdelay
* bond
->params
.miimon
);
832 static DEVICE_ATTR(downdelay
, S_IRUGO
| S_IWUSR
, bonding_show_downdelay
, bonding_store_downdelay
);
834 static ssize_t
bonding_show_updelay(struct device
*d
,
835 struct device_attribute
*attr
,
838 struct bonding
*bond
= to_bond(d
);
840 return sprintf(buf
, "%d\n", bond
->params
.updelay
* bond
->params
.miimon
);
844 static ssize_t
bonding_store_updelay(struct device
*d
,
845 struct device_attribute
*attr
,
846 const char *buf
, size_t count
)
848 int new_value
, ret
= count
;
849 struct bonding
*bond
= to_bond(d
);
851 if (!(bond
->params
.miimon
)) {
852 printk(KERN_ERR DRV_NAME
853 ": %s: Unable to set up delay as MII monitoring is disabled\n",
859 if (sscanf(buf
, "%d", &new_value
) != 1) {
860 printk(KERN_ERR DRV_NAME
861 ": %s: no up delay value specified.\n",
867 printk(KERN_ERR DRV_NAME
868 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
869 bond
->dev
->name
, new_value
, 1, INT_MAX
);
873 if ((new_value
% bond
->params
.miimon
) != 0) {
874 printk(KERN_WARNING DRV_NAME
875 ": %s: Warning: up delay (%d) is not a multiple "
876 "of miimon (%d), updelay rounded to %d ms\n",
877 bond
->dev
->name
, new_value
, bond
->params
.miimon
,
878 (new_value
/ bond
->params
.miimon
) *
879 bond
->params
.miimon
);
881 bond
->params
.updelay
= new_value
/ bond
->params
.miimon
;
882 printk(KERN_INFO DRV_NAME
": %s: Setting up delay to %d.\n",
883 bond
->dev
->name
, bond
->params
.updelay
* bond
->params
.miimon
);
890 static DEVICE_ATTR(updelay
, S_IRUGO
| S_IWUSR
, bonding_show_updelay
, bonding_store_updelay
);
893 * Show and set the LACP interval. Interface must be down, and the mode
894 * must be set to 802.3ad mode.
896 static ssize_t
bonding_show_lacp(struct device
*d
,
897 struct device_attribute
*attr
,
900 struct bonding
*bond
= to_bond(d
);
902 return sprintf(buf
, "%s %d\n",
903 bond_lacp_tbl
[bond
->params
.lacp_fast
].modename
,
904 bond
->params
.lacp_fast
);
907 static ssize_t
bonding_store_lacp(struct device
*d
,
908 struct device_attribute
*attr
,
909 const char *buf
, size_t count
)
911 int new_value
, ret
= count
;
912 struct bonding
*bond
= to_bond(d
);
914 if (bond
->dev
->flags
& IFF_UP
) {
915 printk(KERN_ERR DRV_NAME
916 ": %s: Unable to update LACP rate because interface is up.\n",
922 if (bond
->params
.mode
!= BOND_MODE_8023AD
) {
923 printk(KERN_ERR DRV_NAME
924 ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
930 new_value
= bond_parse_parm(buf
, bond_lacp_tbl
);
932 if ((new_value
== 1) || (new_value
== 0)) {
933 bond
->params
.lacp_fast
= new_value
;
934 printk(KERN_INFO DRV_NAME
935 ": %s: Setting LACP rate to %s (%d).\n",
936 bond
->dev
->name
, bond_lacp_tbl
[new_value
].modename
, new_value
);
938 printk(KERN_ERR DRV_NAME
939 ": %s: Ignoring invalid LACP rate value %.*s.\n",
940 bond
->dev
->name
, (int)strlen(buf
) - 1, buf
);
946 static DEVICE_ATTR(lacp_rate
, S_IRUGO
| S_IWUSR
, bonding_show_lacp
, bonding_store_lacp
);
949 * Show and set the number of grat ARP to send after a failover event.
951 static ssize_t
bonding_show_n_grat_arp(struct device
*d
,
952 struct device_attribute
*attr
,
955 struct bonding
*bond
= to_bond(d
);
957 return sprintf(buf
, "%d\n", bond
->params
.num_grat_arp
);
960 static ssize_t
bonding_store_n_grat_arp(struct device
*d
,
961 struct device_attribute
*attr
,
962 const char *buf
, size_t count
)
964 int new_value
, ret
= count
;
965 struct bonding
*bond
= to_bond(d
);
967 if (sscanf(buf
, "%d", &new_value
) != 1) {
968 printk(KERN_ERR DRV_NAME
969 ": %s: no num_grat_arp value specified.\n",
974 if (new_value
< 0 || new_value
> 255) {
975 printk(KERN_ERR DRV_NAME
976 ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
977 bond
->dev
->name
, new_value
);
981 bond
->params
.num_grat_arp
= new_value
;
986 static DEVICE_ATTR(num_grat_arp
, S_IRUGO
| S_IWUSR
, bonding_show_n_grat_arp
, bonding_store_n_grat_arp
);
988 * Show and set the MII monitor interval. There are two tricky bits
989 * here. First, if MII monitoring is activated, then we must disable
990 * ARP monitoring. Second, if the timer isn't running, we must
993 static ssize_t
bonding_show_miimon(struct device
*d
,
994 struct device_attribute
*attr
,
997 struct bonding
*bond
= to_bond(d
);
999 return sprintf(buf
, "%d\n", bond
->params
.miimon
);
1002 static ssize_t
bonding_store_miimon(struct device
*d
,
1003 struct device_attribute
*attr
,
1004 const char *buf
, size_t count
)
1006 int new_value
, ret
= count
;
1007 struct bonding
*bond
= to_bond(d
);
1009 if (sscanf(buf
, "%d", &new_value
) != 1) {
1010 printk(KERN_ERR DRV_NAME
1011 ": %s: no miimon value specified.\n",
1016 if (new_value
< 0) {
1017 printk(KERN_ERR DRV_NAME
1018 ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1019 bond
->dev
->name
, new_value
, 1, INT_MAX
);
1023 printk(KERN_INFO DRV_NAME
1024 ": %s: Setting MII monitoring interval to %d.\n",
1025 bond
->dev
->name
, new_value
);
1026 bond
->params
.miimon
= new_value
;
1027 if(bond
->params
.updelay
)
1028 printk(KERN_INFO DRV_NAME
1029 ": %s: Note: Updating updelay (to %d) "
1030 "since it is a multiple of the miimon value.\n",
1032 bond
->params
.updelay
* bond
->params
.miimon
);
1033 if(bond
->params
.downdelay
)
1034 printk(KERN_INFO DRV_NAME
1035 ": %s: Note: Updating downdelay (to %d) "
1036 "since it is a multiple of the miimon value.\n",
1038 bond
->params
.downdelay
* bond
->params
.miimon
);
1039 if (bond
->params
.arp_interval
) {
1040 printk(KERN_INFO DRV_NAME
1041 ": %s: MII monitoring cannot be used with "
1042 "ARP monitoring. Disabling ARP monitoring...\n",
1044 bond
->params
.arp_interval
= 0;
1045 if (bond
->params
.arp_validate
) {
1046 bond_unregister_arp(bond
);
1047 bond
->params
.arp_validate
=
1048 BOND_ARP_VALIDATE_NONE
;
1050 if (delayed_work_pending(&bond
->arp_work
)) {
1051 cancel_delayed_work(&bond
->arp_work
);
1052 flush_workqueue(bond
->wq
);
1056 if (bond
->dev
->flags
& IFF_UP
) {
1057 /* If the interface is up, we may need to fire off
1058 * the MII timer. If the interface is down, the
1059 * timer will get fired off when the open function
1062 if (!delayed_work_pending(&bond
->mii_work
)) {
1063 INIT_DELAYED_WORK(&bond
->mii_work
,
1065 queue_delayed_work(bond
->wq
,
1066 &bond
->mii_work
, 0);
1073 static DEVICE_ATTR(miimon
, S_IRUGO
| S_IWUSR
, bonding_show_miimon
, bonding_store_miimon
);
1076 * Show and set the primary slave. The store function is much
1077 * simpler than bonding_store_slaves function because it only needs to
1078 * handle one interface name.
1079 * The bond must be a mode that supports a primary for this be
1082 static ssize_t
bonding_show_primary(struct device
*d
,
1083 struct device_attribute
*attr
,
1087 struct bonding
*bond
= to_bond(d
);
1089 if (bond
->primary_slave
)
1090 count
= sprintf(buf
, "%s\n", bond
->primary_slave
->dev
->name
);
1095 static ssize_t
bonding_store_primary(struct device
*d
,
1096 struct device_attribute
*attr
,
1097 const char *buf
, size_t count
)
1100 struct slave
*slave
;
1101 struct bonding
*bond
= to_bond(d
);
1104 read_lock(&bond
->lock
);
1105 write_lock_bh(&bond
->curr_slave_lock
);
1107 if (!USES_PRIMARY(bond
->params
.mode
)) {
1108 printk(KERN_INFO DRV_NAME
1109 ": %s: Unable to set primary slave; %s is in mode %d\n",
1110 bond
->dev
->name
, bond
->dev
->name
, bond
->params
.mode
);
1112 bond_for_each_slave(bond
, slave
, i
) {
1114 (slave
->dev
->name
, buf
,
1115 strlen(slave
->dev
->name
)) == 0) {
1116 printk(KERN_INFO DRV_NAME
1117 ": %s: Setting %s as primary slave.\n",
1118 bond
->dev
->name
, slave
->dev
->name
);
1119 bond
->primary_slave
= slave
;
1120 bond_select_active_slave(bond
);
1125 /* if we got here, then we didn't match the name of any slave */
1127 if (strlen(buf
) == 0 || buf
[0] == '\n') {
1128 printk(KERN_INFO DRV_NAME
1129 ": %s: Setting primary slave to None.\n",
1131 bond
->primary_slave
= NULL
;
1132 bond_select_active_slave(bond
);
1134 printk(KERN_INFO DRV_NAME
1135 ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1136 bond
->dev
->name
, (int)strlen(buf
) - 1, buf
);
1140 write_unlock_bh(&bond
->curr_slave_lock
);
1141 read_unlock(&bond
->lock
);
1146 static DEVICE_ATTR(primary
, S_IRUGO
| S_IWUSR
, bonding_show_primary
, bonding_store_primary
);
1149 * Show and set the use_carrier flag.
1151 static ssize_t
bonding_show_carrier(struct device
*d
,
1152 struct device_attribute
*attr
,
1155 struct bonding
*bond
= to_bond(d
);
1157 return sprintf(buf
, "%d\n", bond
->params
.use_carrier
);
1160 static ssize_t
bonding_store_carrier(struct device
*d
,
1161 struct device_attribute
*attr
,
1162 const char *buf
, size_t count
)
1164 int new_value
, ret
= count
;
1165 struct bonding
*bond
= to_bond(d
);
1168 if (sscanf(buf
, "%d", &new_value
) != 1) {
1169 printk(KERN_ERR DRV_NAME
1170 ": %s: no use_carrier value specified.\n",
1175 if ((new_value
== 0) || (new_value
== 1)) {
1176 bond
->params
.use_carrier
= new_value
;
1177 printk(KERN_INFO DRV_NAME
": %s: Setting use_carrier to %d.\n",
1178 bond
->dev
->name
, new_value
);
1180 printk(KERN_INFO DRV_NAME
1181 ": %s: Ignoring invalid use_carrier value %d.\n",
1182 bond
->dev
->name
, new_value
);
1187 static DEVICE_ATTR(use_carrier
, S_IRUGO
| S_IWUSR
, bonding_show_carrier
, bonding_store_carrier
);
1191 * Show and set currently active_slave.
1193 static ssize_t
bonding_show_active_slave(struct device
*d
,
1194 struct device_attribute
*attr
,
1198 struct bonding
*bond
= to_bond(d
);
1201 read_lock(&bond
->curr_slave_lock
);
1202 curr
= bond
->curr_active_slave
;
1203 read_unlock(&bond
->curr_slave_lock
);
1205 if (USES_PRIMARY(bond
->params
.mode
) && curr
)
1206 count
= sprintf(buf
, "%s\n", curr
->dev
->name
);
1210 static ssize_t
bonding_store_active_slave(struct device
*d
,
1211 struct device_attribute
*attr
,
1212 const char *buf
, size_t count
)
1215 struct slave
*slave
;
1216 struct slave
*old_active
= NULL
;
1217 struct slave
*new_active
= NULL
;
1218 struct bonding
*bond
= to_bond(d
);
1221 read_lock(&bond
->lock
);
1222 write_lock_bh(&bond
->curr_slave_lock
);
1224 if (!USES_PRIMARY(bond
->params
.mode
)) {
1225 printk(KERN_INFO DRV_NAME
1226 ": %s: Unable to change active slave; %s is in mode %d\n",
1227 bond
->dev
->name
, bond
->dev
->name
, bond
->params
.mode
);
1229 bond_for_each_slave(bond
, slave
, i
) {
1231 (slave
->dev
->name
, buf
,
1232 strlen(slave
->dev
->name
)) == 0) {
1233 old_active
= bond
->curr_active_slave
;
1235 if (new_active
== old_active
) {
1237 printk(KERN_INFO DRV_NAME
1238 ": %s: %s is already the current active slave.\n",
1239 bond
->dev
->name
, slave
->dev
->name
);
1245 (new_active
->link
== BOND_LINK_UP
) &&
1246 IS_UP(new_active
->dev
)) {
1247 printk(KERN_INFO DRV_NAME
1248 ": %s: Setting %s as active slave.\n",
1249 bond
->dev
->name
, slave
->dev
->name
);
1250 bond_change_active_slave(bond
, new_active
);
1253 printk(KERN_INFO DRV_NAME
1254 ": %s: Could not set %s as active slave; "
1255 "either %s is down or the link is down.\n",
1256 bond
->dev
->name
, slave
->dev
->name
,
1264 /* if we got here, then we didn't match the name of any slave */
1266 if (strlen(buf
) == 0 || buf
[0] == '\n') {
1267 printk(KERN_INFO DRV_NAME
1268 ": %s: Setting active slave to None.\n",
1270 bond
->primary_slave
= NULL
;
1271 bond_select_active_slave(bond
);
1273 printk(KERN_INFO DRV_NAME
1274 ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1275 bond
->dev
->name
, (int)strlen(buf
) - 1, buf
);
1279 write_unlock_bh(&bond
->curr_slave_lock
);
1280 read_unlock(&bond
->lock
);
1286 static DEVICE_ATTR(active_slave
, S_IRUGO
| S_IWUSR
, bonding_show_active_slave
, bonding_store_active_slave
);
1290 * Show link status of the bond interface.
1292 static ssize_t
bonding_show_mii_status(struct device
*d
,
1293 struct device_attribute
*attr
,
1297 struct bonding
*bond
= to_bond(d
);
1299 read_lock(&bond
->curr_slave_lock
);
1300 curr
= bond
->curr_active_slave
;
1301 read_unlock(&bond
->curr_slave_lock
);
1303 return sprintf(buf
, "%s\n", (curr
) ? "up" : "down");
1305 static DEVICE_ATTR(mii_status
, S_IRUGO
, bonding_show_mii_status
, NULL
);
1309 * Show current 802.3ad aggregator ID.
1311 static ssize_t
bonding_show_ad_aggregator(struct device
*d
,
1312 struct device_attribute
*attr
,
1316 struct bonding
*bond
= to_bond(d
);
1318 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1319 struct ad_info ad_info
;
1320 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0 : ad_info
.aggregator_id
);
1325 static DEVICE_ATTR(ad_aggregator
, S_IRUGO
, bonding_show_ad_aggregator
, NULL
);
1329 * Show number of active 802.3ad ports.
1331 static ssize_t
bonding_show_ad_num_ports(struct device
*d
,
1332 struct device_attribute
*attr
,
1336 struct bonding
*bond
= to_bond(d
);
1338 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1339 struct ad_info ad_info
;
1340 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0: ad_info
.ports
);
1345 static DEVICE_ATTR(ad_num_ports
, S_IRUGO
, bonding_show_ad_num_ports
, NULL
);
1349 * Show current 802.3ad actor key.
1351 static ssize_t
bonding_show_ad_actor_key(struct device
*d
,
1352 struct device_attribute
*attr
,
1356 struct bonding
*bond
= to_bond(d
);
1358 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1359 struct ad_info ad_info
;
1360 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0 : ad_info
.actor_key
);
1365 static DEVICE_ATTR(ad_actor_key
, S_IRUGO
, bonding_show_ad_actor_key
, NULL
);
1369 * Show current 802.3ad partner key.
1371 static ssize_t
bonding_show_ad_partner_key(struct device
*d
,
1372 struct device_attribute
*attr
,
1376 struct bonding
*bond
= to_bond(d
);
1378 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1379 struct ad_info ad_info
;
1380 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0 : ad_info
.partner_key
);
1385 static DEVICE_ATTR(ad_partner_key
, S_IRUGO
, bonding_show_ad_partner_key
, NULL
);
1389 * Show current 802.3ad partner mac.
1391 static ssize_t
bonding_show_ad_partner_mac(struct device
*d
,
1392 struct device_attribute
*attr
,
1396 struct bonding
*bond
= to_bond(d
);
1397 DECLARE_MAC_BUF(mac
);
1399 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1400 struct ad_info ad_info
;
1401 if (!bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
1402 count
= sprintf(buf
,"%s\n",
1403 print_mac(mac
, ad_info
.partner_system
));
1409 static DEVICE_ATTR(ad_partner_mac
, S_IRUGO
, bonding_show_ad_partner_mac
, NULL
);
1413 static struct attribute
*per_bond_attrs
[] = {
1414 &dev_attr_slaves
.attr
,
1415 &dev_attr_mode
.attr
,
1416 &dev_attr_fail_over_mac
.attr
,
1417 &dev_attr_arp_validate
.attr
,
1418 &dev_attr_arp_interval
.attr
,
1419 &dev_attr_arp_ip_target
.attr
,
1420 &dev_attr_downdelay
.attr
,
1421 &dev_attr_updelay
.attr
,
1422 &dev_attr_lacp_rate
.attr
,
1423 &dev_attr_xmit_hash_policy
.attr
,
1424 &dev_attr_num_grat_arp
.attr
,
1425 &dev_attr_miimon
.attr
,
1426 &dev_attr_primary
.attr
,
1427 &dev_attr_use_carrier
.attr
,
1428 &dev_attr_active_slave
.attr
,
1429 &dev_attr_mii_status
.attr
,
1430 &dev_attr_ad_aggregator
.attr
,
1431 &dev_attr_ad_num_ports
.attr
,
1432 &dev_attr_ad_actor_key
.attr
,
1433 &dev_attr_ad_partner_key
.attr
,
1434 &dev_attr_ad_partner_mac
.attr
,
1438 static struct attribute_group bonding_group
= {
1440 .attrs
= per_bond_attrs
,
1444 * Initialize sysfs. This sets up the bonding_masters file in
1447 int bond_create_sysfs(void)
1451 ret
= netdev_class_create_file(&class_attr_bonding_masters
);
1453 * Permit multiple loads of the module by ignoring failures to
1454 * create the bonding_masters sysfs file. Bonding devices
1455 * created by second or subsequent loads of the module will
1456 * not be listed in, or controllable by, bonding_masters, but
1457 * will have the usual "bonding" sysfs directory.
1459 * This is done to preserve backwards compatibility for
1460 * initscripts/sysconfig, which load bonding multiple times to
1461 * configure multiple bonding devices.
1463 if (ret
== -EEXIST
) {
1464 /* Is someone being kinky and naming a device bonding_master? */
1465 if (__dev_get_by_name(&init_net
,
1466 class_attr_bonding_masters
.attr
.name
))
1468 "network device named %s already exists in sysfs",
1469 class_attr_bonding_masters
.attr
.name
);
1477 * Remove /sys/class/net/bonding_masters.
1479 void bond_destroy_sysfs(void)
1481 netdev_class_remove_file(&class_attr_bonding_masters
);
1485 * Initialize sysfs for each bond. This sets up and registers
1486 * the 'bondctl' directory for each individual bond under /sys/class/net.
1488 int bond_create_sysfs_entry(struct bonding
*bond
)
1490 struct net_device
*dev
= bond
->dev
;
1493 err
= sysfs_create_group(&(dev
->dev
.kobj
), &bonding_group
);
1495 printk(KERN_EMERG
"eek! didn't create group!\n");
1498 if (expected_refcount
< 1)
1499 expected_refcount
= atomic_read(&bond
->dev
->dev
.kobj
.kref
.refcount
);
1504 * Remove sysfs entries for each bond.
1506 void bond_destroy_sysfs_entry(struct bonding
*bond
)
1508 struct net_device
*dev
= bond
->dev
;
1510 sysfs_remove_group(&(dev
->dev
.kobj
), &bonding_group
);