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 res
= bond_release(bond
->dev
, dev
);
358 /* set the slave MTU to the default */
359 if (dev
->change_mtu
) {
360 dev
->change_mtu(dev
, original_mtu
);
362 dev
->mtu
= original_mtu
;
366 printk(KERN_ERR DRV_NAME
": unable to remove non-existent slave %s for bond %s.\n",
367 ifname
, bond
->dev
->name
);
374 printk(KERN_ERR DRV_NAME
": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond
->dev
->name
);
378 up_write(&(bonding_rwsem
));
383 static DEVICE_ATTR(slaves
, S_IRUGO
| S_IWUSR
, bonding_show_slaves
, bonding_store_slaves
);
386 * Show and set the bonding mode. The bond interface must be down to
389 static ssize_t
bonding_show_mode(struct device
*d
,
390 struct device_attribute
*attr
, char *buf
)
392 struct bonding
*bond
= to_bond(d
);
394 return sprintf(buf
, "%s %d\n",
395 bond_mode_tbl
[bond
->params
.mode
].modename
,
399 static ssize_t
bonding_store_mode(struct device
*d
,
400 struct device_attribute
*attr
,
401 const char *buf
, size_t count
)
403 int new_value
, ret
= count
;
404 struct bonding
*bond
= to_bond(d
);
406 if (bond
->dev
->flags
& IFF_UP
) {
407 printk(KERN_ERR DRV_NAME
408 ": unable to update mode of %s because interface is up.\n",
414 new_value
= bond_parse_parm(buf
, bond_mode_tbl
);
416 printk(KERN_ERR DRV_NAME
417 ": %s: Ignoring invalid mode value %.*s.\n",
419 (int)strlen(buf
) - 1, buf
);
423 if (bond
->params
.mode
== BOND_MODE_8023AD
)
424 bond_unset_master_3ad_flags(bond
);
426 if (bond
->params
.mode
== BOND_MODE_ALB
)
427 bond_unset_master_alb_flags(bond
);
429 bond
->params
.mode
= new_value
;
430 bond_set_mode_ops(bond
, bond
->params
.mode
);
431 printk(KERN_INFO DRV_NAME
": %s: setting mode to %s (%d).\n",
432 bond
->dev
->name
, bond_mode_tbl
[new_value
].modename
, new_value
);
437 static DEVICE_ATTR(mode
, S_IRUGO
| S_IWUSR
, bonding_show_mode
, bonding_store_mode
);
440 * Show and set the bonding transmit hash method. The bond interface must be down to
441 * change the xmit hash policy.
443 static ssize_t
bonding_show_xmit_hash(struct device
*d
,
444 struct device_attribute
*attr
,
447 struct bonding
*bond
= to_bond(d
);
449 return sprintf(buf
, "%s %d\n",
450 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
451 bond
->params
.xmit_policy
);
454 static ssize_t
bonding_store_xmit_hash(struct device
*d
,
455 struct device_attribute
*attr
,
456 const char *buf
, size_t count
)
458 int new_value
, ret
= count
;
459 struct bonding
*bond
= to_bond(d
);
461 if (bond
->dev
->flags
& IFF_UP
) {
462 printk(KERN_ERR DRV_NAME
463 "%s: Interface is up. Unable to update xmit policy.\n",
469 new_value
= bond_parse_parm(buf
, xmit_hashtype_tbl
);
471 printk(KERN_ERR DRV_NAME
472 ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
474 (int)strlen(buf
) - 1, buf
);
478 bond
->params
.xmit_policy
= new_value
;
479 bond_set_mode_ops(bond
, bond
->params
.mode
);
480 printk(KERN_INFO DRV_NAME
": %s: setting xmit hash policy to %s (%d).\n",
481 bond
->dev
->name
, xmit_hashtype_tbl
[new_value
].modename
, new_value
);
486 static DEVICE_ATTR(xmit_hash_policy
, S_IRUGO
| S_IWUSR
, bonding_show_xmit_hash
, bonding_store_xmit_hash
);
489 * Show and set arp_validate.
491 static ssize_t
bonding_show_arp_validate(struct device
*d
,
492 struct device_attribute
*attr
,
495 struct bonding
*bond
= to_bond(d
);
497 return sprintf(buf
, "%s %d\n",
498 arp_validate_tbl
[bond
->params
.arp_validate
].modename
,
499 bond
->params
.arp_validate
);
502 static ssize_t
bonding_store_arp_validate(struct device
*d
,
503 struct device_attribute
*attr
,
504 const char *buf
, size_t count
)
507 struct bonding
*bond
= to_bond(d
);
509 new_value
= bond_parse_parm(buf
, arp_validate_tbl
);
511 printk(KERN_ERR DRV_NAME
512 ": %s: Ignoring invalid arp_validate value %s\n",
513 bond
->dev
->name
, buf
);
516 if (new_value
&& (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
)) {
517 printk(KERN_ERR DRV_NAME
518 ": %s: arp_validate only supported in active-backup mode.\n",
522 printk(KERN_INFO DRV_NAME
": %s: setting arp_validate to %s (%d).\n",
523 bond
->dev
->name
, arp_validate_tbl
[new_value
].modename
,
526 if (!bond
->params
.arp_validate
&& new_value
) {
527 bond_register_arp(bond
);
528 } else if (bond
->params
.arp_validate
&& !new_value
) {
529 bond_unregister_arp(bond
);
532 bond
->params
.arp_validate
= new_value
;
537 static DEVICE_ATTR(arp_validate
, S_IRUGO
| S_IWUSR
, bonding_show_arp_validate
, bonding_store_arp_validate
);
540 * Show and store fail_over_mac. User only allowed to change the
541 * value when there are no slaves.
543 static ssize_t
bonding_show_fail_over_mac(struct device
*d
, struct device_attribute
*attr
, char *buf
)
545 struct bonding
*bond
= to_bond(d
);
547 return sprintf(buf
, "%s %d\n",
548 fail_over_mac_tbl
[bond
->params
.fail_over_mac
].modename
,
549 bond
->params
.fail_over_mac
);
552 static ssize_t
bonding_store_fail_over_mac(struct device
*d
, struct device_attribute
*attr
, const char *buf
, size_t count
)
555 struct bonding
*bond
= to_bond(d
);
557 if (bond
->slave_cnt
!= 0) {
558 printk(KERN_ERR DRV_NAME
559 ": %s: Can't alter fail_over_mac with slaves in bond.\n",
564 new_value
= bond_parse_parm(buf
, fail_over_mac_tbl
);
566 printk(KERN_ERR DRV_NAME
567 ": %s: Ignoring invalid fail_over_mac value %s.\n",
568 bond
->dev
->name
, buf
);
572 bond
->params
.fail_over_mac
= new_value
;
573 printk(KERN_INFO DRV_NAME
": %s: Setting fail_over_mac to %s (%d).\n",
574 bond
->dev
->name
, fail_over_mac_tbl
[new_value
].modename
,
580 static DEVICE_ATTR(fail_over_mac
, S_IRUGO
| S_IWUSR
, bonding_show_fail_over_mac
, bonding_store_fail_over_mac
);
583 * Show and set the arp timer interval. There are two tricky bits
584 * here. First, if ARP monitoring is activated, then we must disable
585 * MII monitoring. Second, if the ARP timer isn't running, we must
588 static ssize_t
bonding_show_arp_interval(struct device
*d
,
589 struct device_attribute
*attr
,
592 struct bonding
*bond
= to_bond(d
);
594 return sprintf(buf
, "%d\n", bond
->params
.arp_interval
);
597 static ssize_t
bonding_store_arp_interval(struct device
*d
,
598 struct device_attribute
*attr
,
599 const char *buf
, size_t count
)
601 int new_value
, ret
= count
;
602 struct bonding
*bond
= to_bond(d
);
604 if (sscanf(buf
, "%d", &new_value
) != 1) {
605 printk(KERN_ERR DRV_NAME
606 ": %s: no arp_interval value specified.\n",
612 printk(KERN_ERR DRV_NAME
613 ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
614 bond
->dev
->name
, new_value
, INT_MAX
);
619 printk(KERN_INFO DRV_NAME
620 ": %s: Setting ARP monitoring interval to %d.\n",
621 bond
->dev
->name
, new_value
);
622 bond
->params
.arp_interval
= new_value
;
623 if (bond
->params
.miimon
) {
624 printk(KERN_INFO DRV_NAME
625 ": %s: ARP monitoring cannot be used with MII monitoring. "
626 "%s Disabling MII monitoring.\n",
627 bond
->dev
->name
, bond
->dev
->name
);
628 bond
->params
.miimon
= 0;
629 if (delayed_work_pending(&bond
->mii_work
)) {
630 cancel_delayed_work(&bond
->mii_work
);
631 flush_workqueue(bond
->wq
);
634 if (!bond
->params
.arp_targets
[0]) {
635 printk(KERN_INFO DRV_NAME
636 ": %s: ARP monitoring has been set up, "
637 "but no ARP targets have been specified.\n",
640 if (bond
->dev
->flags
& IFF_UP
) {
641 /* If the interface is up, we may need to fire off
642 * the ARP timer. If the interface is down, the
643 * timer will get fired off when the open function
646 if (!delayed_work_pending(&bond
->arp_work
)) {
647 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
648 INIT_DELAYED_WORK(&bond
->arp_work
,
649 bond_activebackup_arp_mon
);
651 INIT_DELAYED_WORK(&bond
->arp_work
,
652 bond_loadbalance_arp_mon
);
654 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
661 static DEVICE_ATTR(arp_interval
, S_IRUGO
| S_IWUSR
, bonding_show_arp_interval
, bonding_store_arp_interval
);
664 * Show and set the arp targets.
666 static ssize_t
bonding_show_arp_targets(struct device
*d
,
667 struct device_attribute
*attr
,
671 struct bonding
*bond
= to_bond(d
);
673 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
; i
++) {
674 if (bond
->params
.arp_targets
[i
])
675 res
+= sprintf(buf
+ res
, "%u.%u.%u.%u ",
676 NIPQUAD(bond
->params
.arp_targets
[i
]));
679 buf
[res
-1] = '\n'; /* eat the leftover space */
683 static ssize_t
bonding_store_arp_targets(struct device
*d
,
684 struct device_attribute
*attr
,
685 const char *buf
, size_t count
)
688 int i
= 0, done
= 0, ret
= count
;
689 struct bonding
*bond
= to_bond(d
);
692 targets
= bond
->params
.arp_targets
;
693 newtarget
= in_aton(buf
+ 1);
696 if ((newtarget
== 0) || (newtarget
== htonl(INADDR_BROADCAST
))) {
697 printk(KERN_ERR DRV_NAME
698 ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
699 bond
->dev
->name
, NIPQUAD(newtarget
));
703 /* look for an empty slot to put the target in, and check for dupes */
704 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
705 if (targets
[i
] == newtarget
) { /* duplicate */
706 printk(KERN_ERR DRV_NAME
707 ": %s: ARP target %u.%u.%u.%u is already present\n",
708 bond
->dev
->name
, NIPQUAD(newtarget
));
714 if (targets
[i
] == 0 && !done
) {
715 printk(KERN_INFO DRV_NAME
716 ": %s: adding ARP target %d.%d.%d.%d.\n",
717 bond
->dev
->name
, NIPQUAD(newtarget
));
719 targets
[i
] = newtarget
;
723 printk(KERN_ERR DRV_NAME
724 ": %s: ARP target table is full!\n",
731 else if (buf
[0] == '-') {
732 if ((newtarget
== 0) || (newtarget
== htonl(INADDR_BROADCAST
))) {
733 printk(KERN_ERR DRV_NAME
734 ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
735 bond
->dev
->name
, NIPQUAD(newtarget
));
740 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
741 if (targets
[i
] == newtarget
) {
742 printk(KERN_INFO DRV_NAME
743 ": %s: removing ARP target %d.%d.%d.%d.\n",
744 bond
->dev
->name
, NIPQUAD(newtarget
));
750 printk(KERN_INFO DRV_NAME
751 ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
752 bond
->dev
->name
, NIPQUAD(newtarget
));
758 printk(KERN_ERR DRV_NAME
": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
767 static DEVICE_ATTR(arp_ip_target
, S_IRUGO
| S_IWUSR
, bonding_show_arp_targets
, bonding_store_arp_targets
);
770 * Show and set the up and down delays. These must be multiples of the
771 * MII monitoring value, and are stored internally as the multiplier.
772 * Thus, we must translate to MS for the real world.
774 static ssize_t
bonding_show_downdelay(struct device
*d
,
775 struct device_attribute
*attr
,
778 struct bonding
*bond
= to_bond(d
);
780 return sprintf(buf
, "%d\n", bond
->params
.downdelay
* bond
->params
.miimon
);
783 static ssize_t
bonding_store_downdelay(struct device
*d
,
784 struct device_attribute
*attr
,
785 const char *buf
, size_t count
)
787 int new_value
, ret
= count
;
788 struct bonding
*bond
= to_bond(d
);
790 if (!(bond
->params
.miimon
)) {
791 printk(KERN_ERR DRV_NAME
792 ": %s: Unable to set down delay as MII monitoring is disabled\n",
798 if (sscanf(buf
, "%d", &new_value
) != 1) {
799 printk(KERN_ERR DRV_NAME
800 ": %s: no down delay value specified.\n",
806 printk(KERN_ERR DRV_NAME
807 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
808 bond
->dev
->name
, new_value
, 1, INT_MAX
);
812 if ((new_value
% bond
->params
.miimon
) != 0) {
813 printk(KERN_WARNING DRV_NAME
814 ": %s: Warning: down delay (%d) is not a multiple "
815 "of miimon (%d), delay rounded to %d ms\n",
816 bond
->dev
->name
, new_value
, bond
->params
.miimon
,
817 (new_value
/ bond
->params
.miimon
) *
818 bond
->params
.miimon
);
820 bond
->params
.downdelay
= new_value
/ bond
->params
.miimon
;
821 printk(KERN_INFO DRV_NAME
": %s: Setting down delay to %d.\n",
822 bond
->dev
->name
, bond
->params
.downdelay
* bond
->params
.miimon
);
829 static DEVICE_ATTR(downdelay
, S_IRUGO
| S_IWUSR
, bonding_show_downdelay
, bonding_store_downdelay
);
831 static ssize_t
bonding_show_updelay(struct device
*d
,
832 struct device_attribute
*attr
,
835 struct bonding
*bond
= to_bond(d
);
837 return sprintf(buf
, "%d\n", bond
->params
.updelay
* bond
->params
.miimon
);
841 static ssize_t
bonding_store_updelay(struct device
*d
,
842 struct device_attribute
*attr
,
843 const char *buf
, size_t count
)
845 int new_value
, ret
= count
;
846 struct bonding
*bond
= to_bond(d
);
848 if (!(bond
->params
.miimon
)) {
849 printk(KERN_ERR DRV_NAME
850 ": %s: Unable to set up delay as MII monitoring is disabled\n",
856 if (sscanf(buf
, "%d", &new_value
) != 1) {
857 printk(KERN_ERR DRV_NAME
858 ": %s: no up delay value specified.\n",
864 printk(KERN_ERR DRV_NAME
865 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
866 bond
->dev
->name
, new_value
, 1, INT_MAX
);
870 if ((new_value
% bond
->params
.miimon
) != 0) {
871 printk(KERN_WARNING DRV_NAME
872 ": %s: Warning: up delay (%d) is not a multiple "
873 "of miimon (%d), updelay rounded to %d ms\n",
874 bond
->dev
->name
, new_value
, bond
->params
.miimon
,
875 (new_value
/ bond
->params
.miimon
) *
876 bond
->params
.miimon
);
878 bond
->params
.updelay
= new_value
/ bond
->params
.miimon
;
879 printk(KERN_INFO DRV_NAME
": %s: Setting up delay to %d.\n",
880 bond
->dev
->name
, bond
->params
.updelay
* bond
->params
.miimon
);
887 static DEVICE_ATTR(updelay
, S_IRUGO
| S_IWUSR
, bonding_show_updelay
, bonding_store_updelay
);
890 * Show and set the LACP interval. Interface must be down, and the mode
891 * must be set to 802.3ad mode.
893 static ssize_t
bonding_show_lacp(struct device
*d
,
894 struct device_attribute
*attr
,
897 struct bonding
*bond
= to_bond(d
);
899 return sprintf(buf
, "%s %d\n",
900 bond_lacp_tbl
[bond
->params
.lacp_fast
].modename
,
901 bond
->params
.lacp_fast
);
904 static ssize_t
bonding_store_lacp(struct device
*d
,
905 struct device_attribute
*attr
,
906 const char *buf
, size_t count
)
908 int new_value
, ret
= count
;
909 struct bonding
*bond
= to_bond(d
);
911 if (bond
->dev
->flags
& IFF_UP
) {
912 printk(KERN_ERR DRV_NAME
913 ": %s: Unable to update LACP rate because interface is up.\n",
919 if (bond
->params
.mode
!= BOND_MODE_8023AD
) {
920 printk(KERN_ERR DRV_NAME
921 ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
927 new_value
= bond_parse_parm(buf
, bond_lacp_tbl
);
929 if ((new_value
== 1) || (new_value
== 0)) {
930 bond
->params
.lacp_fast
= new_value
;
931 printk(KERN_INFO DRV_NAME
932 ": %s: Setting LACP rate to %s (%d).\n",
933 bond
->dev
->name
, bond_lacp_tbl
[new_value
].modename
, new_value
);
935 printk(KERN_ERR DRV_NAME
936 ": %s: Ignoring invalid LACP rate value %.*s.\n",
937 bond
->dev
->name
, (int)strlen(buf
) - 1, buf
);
943 static DEVICE_ATTR(lacp_rate
, S_IRUGO
| S_IWUSR
, bonding_show_lacp
, bonding_store_lacp
);
946 * Show and set the number of grat ARP to send after a failover event.
948 static ssize_t
bonding_show_n_grat_arp(struct device
*d
,
949 struct device_attribute
*attr
,
952 struct bonding
*bond
= to_bond(d
);
954 return sprintf(buf
, "%d\n", bond
->params
.num_grat_arp
);
957 static ssize_t
bonding_store_n_grat_arp(struct device
*d
,
958 struct device_attribute
*attr
,
959 const char *buf
, size_t count
)
961 int new_value
, ret
= count
;
962 struct bonding
*bond
= to_bond(d
);
964 if (sscanf(buf
, "%d", &new_value
) != 1) {
965 printk(KERN_ERR DRV_NAME
966 ": %s: no num_grat_arp value specified.\n",
971 if (new_value
< 0 || new_value
> 255) {
972 printk(KERN_ERR DRV_NAME
973 ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
974 bond
->dev
->name
, new_value
);
978 bond
->params
.num_grat_arp
= new_value
;
983 static DEVICE_ATTR(num_grat_arp
, S_IRUGO
| S_IWUSR
, bonding_show_n_grat_arp
, bonding_store_n_grat_arp
);
985 * Show and set the MII monitor interval. There are two tricky bits
986 * here. First, if MII monitoring is activated, then we must disable
987 * ARP monitoring. Second, if the timer isn't running, we must
990 static ssize_t
bonding_show_miimon(struct device
*d
,
991 struct device_attribute
*attr
,
994 struct bonding
*bond
= to_bond(d
);
996 return sprintf(buf
, "%d\n", bond
->params
.miimon
);
999 static ssize_t
bonding_store_miimon(struct device
*d
,
1000 struct device_attribute
*attr
,
1001 const char *buf
, size_t count
)
1003 int new_value
, ret
= count
;
1004 struct bonding
*bond
= to_bond(d
);
1006 if (sscanf(buf
, "%d", &new_value
) != 1) {
1007 printk(KERN_ERR DRV_NAME
1008 ": %s: no miimon value specified.\n",
1013 if (new_value
< 0) {
1014 printk(KERN_ERR DRV_NAME
1015 ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1016 bond
->dev
->name
, new_value
, 1, INT_MAX
);
1020 printk(KERN_INFO DRV_NAME
1021 ": %s: Setting MII monitoring interval to %d.\n",
1022 bond
->dev
->name
, new_value
);
1023 bond
->params
.miimon
= new_value
;
1024 if(bond
->params
.updelay
)
1025 printk(KERN_INFO DRV_NAME
1026 ": %s: Note: Updating updelay (to %d) "
1027 "since it is a multiple of the miimon value.\n",
1029 bond
->params
.updelay
* bond
->params
.miimon
);
1030 if(bond
->params
.downdelay
)
1031 printk(KERN_INFO DRV_NAME
1032 ": %s: Note: Updating downdelay (to %d) "
1033 "since it is a multiple of the miimon value.\n",
1035 bond
->params
.downdelay
* bond
->params
.miimon
);
1036 if (bond
->params
.arp_interval
) {
1037 printk(KERN_INFO DRV_NAME
1038 ": %s: MII monitoring cannot be used with "
1039 "ARP monitoring. Disabling ARP monitoring...\n",
1041 bond
->params
.arp_interval
= 0;
1042 if (bond
->params
.arp_validate
) {
1043 bond_unregister_arp(bond
);
1044 bond
->params
.arp_validate
=
1045 BOND_ARP_VALIDATE_NONE
;
1047 if (delayed_work_pending(&bond
->arp_work
)) {
1048 cancel_delayed_work(&bond
->arp_work
);
1049 flush_workqueue(bond
->wq
);
1053 if (bond
->dev
->flags
& IFF_UP
) {
1054 /* If the interface is up, we may need to fire off
1055 * the MII timer. If the interface is down, the
1056 * timer will get fired off when the open function
1059 if (!delayed_work_pending(&bond
->mii_work
)) {
1060 INIT_DELAYED_WORK(&bond
->mii_work
,
1062 queue_delayed_work(bond
->wq
,
1063 &bond
->mii_work
, 0);
1070 static DEVICE_ATTR(miimon
, S_IRUGO
| S_IWUSR
, bonding_show_miimon
, bonding_store_miimon
);
1073 * Show and set the primary slave. The store function is much
1074 * simpler than bonding_store_slaves function because it only needs to
1075 * handle one interface name.
1076 * The bond must be a mode that supports a primary for this be
1079 static ssize_t
bonding_show_primary(struct device
*d
,
1080 struct device_attribute
*attr
,
1084 struct bonding
*bond
= to_bond(d
);
1086 if (bond
->primary_slave
)
1087 count
= sprintf(buf
, "%s\n", bond
->primary_slave
->dev
->name
);
1092 static ssize_t
bonding_store_primary(struct device
*d
,
1093 struct device_attribute
*attr
,
1094 const char *buf
, size_t count
)
1097 struct slave
*slave
;
1098 struct bonding
*bond
= to_bond(d
);
1101 read_lock(&bond
->lock
);
1102 write_lock_bh(&bond
->curr_slave_lock
);
1104 if (!USES_PRIMARY(bond
->params
.mode
)) {
1105 printk(KERN_INFO DRV_NAME
1106 ": %s: Unable to set primary slave; %s is in mode %d\n",
1107 bond
->dev
->name
, bond
->dev
->name
, bond
->params
.mode
);
1109 bond_for_each_slave(bond
, slave
, i
) {
1111 (slave
->dev
->name
, buf
,
1112 strlen(slave
->dev
->name
)) == 0) {
1113 printk(KERN_INFO DRV_NAME
1114 ": %s: Setting %s as primary slave.\n",
1115 bond
->dev
->name
, slave
->dev
->name
);
1116 bond
->primary_slave
= slave
;
1117 bond_select_active_slave(bond
);
1122 /* if we got here, then we didn't match the name of any slave */
1124 if (strlen(buf
) == 0 || buf
[0] == '\n') {
1125 printk(KERN_INFO DRV_NAME
1126 ": %s: Setting primary slave to None.\n",
1128 bond
->primary_slave
= NULL
;
1129 bond_select_active_slave(bond
);
1131 printk(KERN_INFO DRV_NAME
1132 ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1133 bond
->dev
->name
, (int)strlen(buf
) - 1, buf
);
1137 write_unlock_bh(&bond
->curr_slave_lock
);
1138 read_unlock(&bond
->lock
);
1143 static DEVICE_ATTR(primary
, S_IRUGO
| S_IWUSR
, bonding_show_primary
, bonding_store_primary
);
1146 * Show and set the use_carrier flag.
1148 static ssize_t
bonding_show_carrier(struct device
*d
,
1149 struct device_attribute
*attr
,
1152 struct bonding
*bond
= to_bond(d
);
1154 return sprintf(buf
, "%d\n", bond
->params
.use_carrier
);
1157 static ssize_t
bonding_store_carrier(struct device
*d
,
1158 struct device_attribute
*attr
,
1159 const char *buf
, size_t count
)
1161 int new_value
, ret
= count
;
1162 struct bonding
*bond
= to_bond(d
);
1165 if (sscanf(buf
, "%d", &new_value
) != 1) {
1166 printk(KERN_ERR DRV_NAME
1167 ": %s: no use_carrier value specified.\n",
1172 if ((new_value
== 0) || (new_value
== 1)) {
1173 bond
->params
.use_carrier
= new_value
;
1174 printk(KERN_INFO DRV_NAME
": %s: Setting use_carrier to %d.\n",
1175 bond
->dev
->name
, new_value
);
1177 printk(KERN_INFO DRV_NAME
1178 ": %s: Ignoring invalid use_carrier value %d.\n",
1179 bond
->dev
->name
, new_value
);
1184 static DEVICE_ATTR(use_carrier
, S_IRUGO
| S_IWUSR
, bonding_show_carrier
, bonding_store_carrier
);
1188 * Show and set currently active_slave.
1190 static ssize_t
bonding_show_active_slave(struct device
*d
,
1191 struct device_attribute
*attr
,
1195 struct bonding
*bond
= to_bond(d
);
1198 read_lock(&bond
->curr_slave_lock
);
1199 curr
= bond
->curr_active_slave
;
1200 read_unlock(&bond
->curr_slave_lock
);
1202 if (USES_PRIMARY(bond
->params
.mode
) && curr
)
1203 count
= sprintf(buf
, "%s\n", curr
->dev
->name
);
1207 static ssize_t
bonding_store_active_slave(struct device
*d
,
1208 struct device_attribute
*attr
,
1209 const char *buf
, size_t count
)
1212 struct slave
*slave
;
1213 struct slave
*old_active
= NULL
;
1214 struct slave
*new_active
= NULL
;
1215 struct bonding
*bond
= to_bond(d
);
1218 read_lock(&bond
->lock
);
1219 write_lock_bh(&bond
->curr_slave_lock
);
1221 if (!USES_PRIMARY(bond
->params
.mode
)) {
1222 printk(KERN_INFO DRV_NAME
1223 ": %s: Unable to change active slave; %s is in mode %d\n",
1224 bond
->dev
->name
, bond
->dev
->name
, bond
->params
.mode
);
1226 bond_for_each_slave(bond
, slave
, i
) {
1228 (slave
->dev
->name
, buf
,
1229 strlen(slave
->dev
->name
)) == 0) {
1230 old_active
= bond
->curr_active_slave
;
1232 if (new_active
== old_active
) {
1234 printk(KERN_INFO DRV_NAME
1235 ": %s: %s is already the current active slave.\n",
1236 bond
->dev
->name
, slave
->dev
->name
);
1242 (new_active
->link
== BOND_LINK_UP
) &&
1243 IS_UP(new_active
->dev
)) {
1244 printk(KERN_INFO DRV_NAME
1245 ": %s: Setting %s as active slave.\n",
1246 bond
->dev
->name
, slave
->dev
->name
);
1247 bond_change_active_slave(bond
, new_active
);
1250 printk(KERN_INFO DRV_NAME
1251 ": %s: Could not set %s as active slave; "
1252 "either %s is down or the link is down.\n",
1253 bond
->dev
->name
, slave
->dev
->name
,
1261 /* if we got here, then we didn't match the name of any slave */
1263 if (strlen(buf
) == 0 || buf
[0] == '\n') {
1264 printk(KERN_INFO DRV_NAME
1265 ": %s: Setting active slave to None.\n",
1267 bond
->primary_slave
= NULL
;
1268 bond_select_active_slave(bond
);
1270 printk(KERN_INFO DRV_NAME
1271 ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1272 bond
->dev
->name
, (int)strlen(buf
) - 1, buf
);
1276 write_unlock_bh(&bond
->curr_slave_lock
);
1277 read_unlock(&bond
->lock
);
1283 static DEVICE_ATTR(active_slave
, S_IRUGO
| S_IWUSR
, bonding_show_active_slave
, bonding_store_active_slave
);
1287 * Show link status of the bond interface.
1289 static ssize_t
bonding_show_mii_status(struct device
*d
,
1290 struct device_attribute
*attr
,
1294 struct bonding
*bond
= to_bond(d
);
1296 read_lock(&bond
->curr_slave_lock
);
1297 curr
= bond
->curr_active_slave
;
1298 read_unlock(&bond
->curr_slave_lock
);
1300 return sprintf(buf
, "%s\n", (curr
) ? "up" : "down");
1302 static DEVICE_ATTR(mii_status
, S_IRUGO
, bonding_show_mii_status
, NULL
);
1306 * Show current 802.3ad aggregator ID.
1308 static ssize_t
bonding_show_ad_aggregator(struct device
*d
,
1309 struct device_attribute
*attr
,
1313 struct bonding
*bond
= to_bond(d
);
1315 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1316 struct ad_info ad_info
;
1317 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0 : ad_info
.aggregator_id
);
1322 static DEVICE_ATTR(ad_aggregator
, S_IRUGO
, bonding_show_ad_aggregator
, NULL
);
1326 * Show number of active 802.3ad ports.
1328 static ssize_t
bonding_show_ad_num_ports(struct device
*d
,
1329 struct device_attribute
*attr
,
1333 struct bonding
*bond
= to_bond(d
);
1335 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1336 struct ad_info ad_info
;
1337 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0: ad_info
.ports
);
1342 static DEVICE_ATTR(ad_num_ports
, S_IRUGO
, bonding_show_ad_num_ports
, NULL
);
1346 * Show current 802.3ad actor key.
1348 static ssize_t
bonding_show_ad_actor_key(struct device
*d
,
1349 struct device_attribute
*attr
,
1353 struct bonding
*bond
= to_bond(d
);
1355 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1356 struct ad_info ad_info
;
1357 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0 : ad_info
.actor_key
);
1362 static DEVICE_ATTR(ad_actor_key
, S_IRUGO
, bonding_show_ad_actor_key
, NULL
);
1366 * Show current 802.3ad partner key.
1368 static ssize_t
bonding_show_ad_partner_key(struct device
*d
,
1369 struct device_attribute
*attr
,
1373 struct bonding
*bond
= to_bond(d
);
1375 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1376 struct ad_info ad_info
;
1377 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0 : ad_info
.partner_key
);
1382 static DEVICE_ATTR(ad_partner_key
, S_IRUGO
, bonding_show_ad_partner_key
, NULL
);
1386 * Show current 802.3ad partner mac.
1388 static ssize_t
bonding_show_ad_partner_mac(struct device
*d
,
1389 struct device_attribute
*attr
,
1393 struct bonding
*bond
= to_bond(d
);
1394 DECLARE_MAC_BUF(mac
);
1396 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1397 struct ad_info ad_info
;
1398 if (!bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
1399 count
= sprintf(buf
,"%s\n",
1400 print_mac(mac
, ad_info
.partner_system
));
1406 static DEVICE_ATTR(ad_partner_mac
, S_IRUGO
, bonding_show_ad_partner_mac
, NULL
);
1410 static struct attribute
*per_bond_attrs
[] = {
1411 &dev_attr_slaves
.attr
,
1412 &dev_attr_mode
.attr
,
1413 &dev_attr_fail_over_mac
.attr
,
1414 &dev_attr_arp_validate
.attr
,
1415 &dev_attr_arp_interval
.attr
,
1416 &dev_attr_arp_ip_target
.attr
,
1417 &dev_attr_downdelay
.attr
,
1418 &dev_attr_updelay
.attr
,
1419 &dev_attr_lacp_rate
.attr
,
1420 &dev_attr_xmit_hash_policy
.attr
,
1421 &dev_attr_num_grat_arp
.attr
,
1422 &dev_attr_miimon
.attr
,
1423 &dev_attr_primary
.attr
,
1424 &dev_attr_use_carrier
.attr
,
1425 &dev_attr_active_slave
.attr
,
1426 &dev_attr_mii_status
.attr
,
1427 &dev_attr_ad_aggregator
.attr
,
1428 &dev_attr_ad_num_ports
.attr
,
1429 &dev_attr_ad_actor_key
.attr
,
1430 &dev_attr_ad_partner_key
.attr
,
1431 &dev_attr_ad_partner_mac
.attr
,
1435 static struct attribute_group bonding_group
= {
1437 .attrs
= per_bond_attrs
,
1441 * Initialize sysfs. This sets up the bonding_masters file in
1444 int bond_create_sysfs(void)
1448 ret
= netdev_class_create_file(&class_attr_bonding_masters
);
1450 * Permit multiple loads of the module by ignoring failures to
1451 * create the bonding_masters sysfs file. Bonding devices
1452 * created by second or subsequent loads of the module will
1453 * not be listed in, or controllable by, bonding_masters, but
1454 * will have the usual "bonding" sysfs directory.
1456 * This is done to preserve backwards compatibility for
1457 * initscripts/sysconfig, which load bonding multiple times to
1458 * configure multiple bonding devices.
1460 if (ret
== -EEXIST
) {
1461 /* Is someone being kinky and naming a device bonding_master? */
1462 if (__dev_get_by_name(&init_net
,
1463 class_attr_bonding_masters
.attr
.name
))
1465 "network device named %s already exists in sysfs",
1466 class_attr_bonding_masters
.attr
.name
);
1474 * Remove /sys/class/net/bonding_masters.
1476 void bond_destroy_sysfs(void)
1478 netdev_class_remove_file(&class_attr_bonding_masters
);
1482 * Initialize sysfs for each bond. This sets up and registers
1483 * the 'bondctl' directory for each individual bond under /sys/class/net.
1485 int bond_create_sysfs_entry(struct bonding
*bond
)
1487 struct net_device
*dev
= bond
->dev
;
1490 err
= sysfs_create_group(&(dev
->dev
.kobj
), &bonding_group
);
1492 printk(KERN_EMERG
"eek! didn't create group!\n");
1495 if (expected_refcount
< 1)
1496 expected_refcount
= atomic_read(&bond
->dev
->dev
.kobj
.kref
.refcount
);
1501 * Remove sysfs entries for each bond.
1503 void bond_destroy_sysfs_entry(struct bonding
*bond
)
1505 struct net_device
*dev
= bond
->dev
;
1507 sysfs_remove_group(&(dev
->dev
.kobj
), &bonding_group
);