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
[];
54 static int expected_refcount
= -1;
55 static struct class *netdev_class
;
56 /*--------------------------- Data Structures -----------------------------*/
58 /* Bonding sysfs lock. Why can't we just use the subsytem 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 *buffer
)
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(buffer
+ res
, "++more++");
92 res
+= sprintf(buffer
+ res
, "%s ",
95 res
+= sprintf(buffer
+ res
, "\n");
97 up_read(&(bonding_rwsem
));
102 * "store" function for the bond_masters attribute. This is what
103 * creates and deletes entire bonds.
105 * The class parameter is ignored.
109 static ssize_t
bonding_store_bonds(struct class *cls
, const char *buffer
, size_t count
)
111 char command
[IFNAMSIZ
+ 1] = {0, };
114 struct bonding
*bond
;
117 down_write(&(bonding_rwsem
));
118 sscanf(buffer
, "%16s", command
); /* IFNAMSIZ*/
119 ifname
= command
+ 1;
120 if ((strlen(command
) <= 1) ||
121 !dev_valid_name(ifname
))
124 if (command
[0] == '+') {
126 /* Check to see if the bond already exists. */
127 list_for_each_entry_safe(bond
, nxt
, &bond_dev_list
, bond_list
)
128 if (strnicmp(bond
->dev
->name
, ifname
, IFNAMSIZ
) == 0) {
129 printk(KERN_ERR DRV_NAME
130 ": cannot add bond %s; it already exists\n",
136 printk(KERN_INFO DRV_NAME
137 ": %s is being created...\n", ifname
);
138 if (bond_create(ifname
, &bonding_defaults
, &bond
)) {
139 printk(KERN_INFO DRV_NAME
140 ": %s interface already exists. Bond creation failed.\n",
147 if (command
[0] == '-') {
148 list_for_each_entry_safe(bond
, nxt
, &bond_dev_list
, bond_list
)
149 if (strnicmp(bond
->dev
->name
, ifname
, IFNAMSIZ
) == 0) {
151 /* check the ref count on the bond's kobject.
152 * If it's > expected, then there's a file open,
153 * and we have to fail.
155 if (atomic_read(&bond
->dev
->dev
.kobj
.kref
.refcount
)
156 > expected_refcount
){
158 printk(KERN_INFO DRV_NAME
159 ": Unable remove bond %s due to open references.\n",
164 printk(KERN_INFO DRV_NAME
165 ": %s is being deleted...\n",
167 bond_deinit(bond
->dev
);
168 bond_destroy_sysfs_entry(bond
);
169 unregister_netdevice(bond
->dev
);
174 printk(KERN_ERR DRV_NAME
175 ": unable to delete non-existent bond %s\n", ifname
);
181 printk(KERN_ERR DRV_NAME
182 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
185 /* Always return either count or an error. If you return 0, you'll
186 * get called forever, which is bad.
189 up_write(&(bonding_rwsem
));
192 /* class attribute for bond_masters file. This ends up in /sys/class/net */
193 static CLASS_ATTR(bonding_masters
, S_IWUSR
| S_IRUGO
,
194 bonding_show_bonds
, bonding_store_bonds
);
196 int bond_create_slave_symlinks(struct net_device
*master
, struct net_device
*slave
)
198 char linkname
[IFNAMSIZ
+7];
201 /* first, create a link from the slave back to the master */
202 ret
= sysfs_create_link(&(slave
->dev
.kobj
), &(master
->dev
.kobj
),
206 /* next, create a link from the master to the slave */
207 sprintf(linkname
,"slave_%s",slave
->name
);
208 ret
= sysfs_create_link(&(master
->dev
.kobj
), &(slave
->dev
.kobj
),
214 void bond_destroy_slave_symlinks(struct net_device
*master
, struct net_device
*slave
)
216 char linkname
[IFNAMSIZ
+7];
218 sysfs_remove_link(&(slave
->dev
.kobj
), "master");
219 sprintf(linkname
,"slave_%s",slave
->name
);
220 sysfs_remove_link(&(master
->dev
.kobj
), linkname
);
225 * Show the slaves in the current bond.
227 static ssize_t
bonding_show_slaves(struct device
*d
,
228 struct device_attribute
*attr
, char *buf
)
232 struct bonding
*bond
= to_bond(d
);
234 read_lock_bh(&bond
->lock
);
235 bond_for_each_slave(bond
, slave
, i
) {
236 if (res
> (PAGE_SIZE
- IFNAMSIZ
)) {
237 /* not enough space for another interface name */
238 if ((PAGE_SIZE
- res
) > 10)
239 res
= PAGE_SIZE
- 10;
240 res
+= sprintf(buf
+ res
, "++more++");
243 res
+= sprintf(buf
+ res
, "%s ", slave
->dev
->name
);
245 read_unlock_bh(&bond
->lock
);
246 res
+= sprintf(buf
+ res
, "\n");
252 * Set the slaves in the current bond. The bond interface must be
253 * up for this to succeed.
254 * This function is largely the same flow as bonding_update_bonds().
256 static ssize_t
bonding_store_slaves(struct device
*d
,
257 struct device_attribute
*attr
,
258 const char *buffer
, size_t count
)
260 char command
[IFNAMSIZ
+ 1] = { 0, };
262 int i
, res
, found
, ret
= count
;
265 struct net_device
*dev
= NULL
;
266 struct bonding
*bond
= to_bond(d
);
268 /* Quick sanity check -- is the bond interface up? */
269 if (!(bond
->dev
->flags
& IFF_UP
)) {
270 printk(KERN_WARNING DRV_NAME
271 ": %s: doing slave updates when interface is down.\n",
275 /* Note: We can't hold bond->lock here, as bond_create grabs it. */
277 sscanf(buffer
, "%16s", command
); /* IFNAMSIZ*/
278 ifname
= command
+ 1;
279 if ((strlen(command
) <= 1) ||
280 !dev_valid_name(ifname
))
283 if (command
[0] == '+') {
285 /* Got a slave name in ifname. Is it already in the list? */
287 read_lock_bh(&bond
->lock
);
288 bond_for_each_slave(bond
, slave
, i
)
289 if (strnicmp(slave
->dev
->name
, ifname
, IFNAMSIZ
) == 0) {
290 printk(KERN_ERR DRV_NAME
291 ": %s: Interface %s is already enslaved!\n",
292 bond
->dev
->name
, ifname
);
294 read_unlock_bh(&bond
->lock
);
298 read_unlock_bh(&bond
->lock
);
299 printk(KERN_INFO DRV_NAME
": %s: Adding slave %s.\n",
300 bond
->dev
->name
, ifname
);
301 dev
= dev_get_by_name(&init_net
, ifname
);
303 printk(KERN_INFO DRV_NAME
304 ": %s: Interface %s does not exist!\n",
305 bond
->dev
->name
, ifname
);
312 if (dev
->flags
& IFF_UP
) {
313 printk(KERN_ERR DRV_NAME
314 ": %s: Error: Unable to enslave %s "
315 "because it is already up.\n",
316 bond
->dev
->name
, dev
->name
);
320 /* If this is the first slave, then we need to set
321 the master's hardware address to be the same as the
323 if (!(*((u32
*) & (bond
->dev
->dev_addr
[0])))) {
324 memcpy(bond
->dev
->dev_addr
, dev
->dev_addr
,
328 /* Set the slave's MTU to match the bond */
329 original_mtu
= dev
->mtu
;
330 if (dev
->mtu
!= bond
->dev
->mtu
) {
331 if (dev
->change_mtu
) {
332 res
= dev
->change_mtu(dev
,
339 dev
->mtu
= bond
->dev
->mtu
;
343 res
= bond_enslave(bond
->dev
, dev
);
344 bond_for_each_slave(bond
, slave
, i
)
345 if (strnicmp(slave
->dev
->name
, ifname
, IFNAMSIZ
) == 0)
346 slave
->original_mtu
= original_mtu
;
354 if (command
[0] == '-') {
356 bond_for_each_slave(bond
, slave
, i
)
357 if (strnicmp(slave
->dev
->name
, ifname
, IFNAMSIZ
) == 0) {
359 original_mtu
= slave
->original_mtu
;
363 printk(KERN_INFO DRV_NAME
": %s: Removing slave %s\n",
364 bond
->dev
->name
, dev
->name
);
366 res
= bond_release(bond
->dev
, dev
);
372 /* set the slave MTU to the default */
373 if (dev
->change_mtu
) {
374 dev
->change_mtu(dev
, original_mtu
);
376 dev
->mtu
= original_mtu
;
380 printk(KERN_ERR DRV_NAME
": unable to remove non-existent slave %s for bond %s.\n",
381 ifname
, bond
->dev
->name
);
388 printk(KERN_ERR DRV_NAME
": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond
->dev
->name
);
395 static DEVICE_ATTR(slaves
, S_IRUGO
| S_IWUSR
, bonding_show_slaves
, bonding_store_slaves
);
398 * Show and set the bonding mode. The bond interface must be down to
401 static ssize_t
bonding_show_mode(struct device
*d
,
402 struct device_attribute
*attr
, char *buf
)
404 struct bonding
*bond
= to_bond(d
);
406 return sprintf(buf
, "%s %d\n",
407 bond_mode_tbl
[bond
->params
.mode
].modename
,
408 bond
->params
.mode
) + 1;
411 static ssize_t
bonding_store_mode(struct device
*d
,
412 struct device_attribute
*attr
,
413 const char *buf
, size_t count
)
415 int new_value
, ret
= count
;
416 struct bonding
*bond
= to_bond(d
);
418 if (bond
->dev
->flags
& IFF_UP
) {
419 printk(KERN_ERR DRV_NAME
420 ": unable to update mode of %s because interface is up.\n",
426 new_value
= bond_parse_parm((char *)buf
, bond_mode_tbl
);
428 printk(KERN_ERR DRV_NAME
429 ": %s: Ignoring invalid mode value %.*s.\n",
431 (int)strlen(buf
) - 1, buf
);
435 if (bond
->params
.mode
== BOND_MODE_8023AD
)
436 bond_unset_master_3ad_flags(bond
);
438 if (bond
->params
.mode
== BOND_MODE_ALB
)
439 bond_unset_master_alb_flags(bond
);
441 bond
->params
.mode
= new_value
;
442 bond_set_mode_ops(bond
, bond
->params
.mode
);
443 printk(KERN_INFO DRV_NAME
": %s: setting mode to %s (%d).\n",
444 bond
->dev
->name
, bond_mode_tbl
[new_value
].modename
, new_value
);
449 static DEVICE_ATTR(mode
, S_IRUGO
| S_IWUSR
, bonding_show_mode
, bonding_store_mode
);
452 * Show and set the bonding transmit hash method. The bond interface must be down to
453 * change the xmit hash policy.
455 static ssize_t
bonding_show_xmit_hash(struct device
*d
,
456 struct device_attribute
*attr
,
460 struct bonding
*bond
= to_bond(d
);
462 if ((bond
->params
.mode
!= BOND_MODE_XOR
) &&
463 (bond
->params
.mode
!= BOND_MODE_8023AD
)) {
465 count
= sprintf(buf
, "NA\n") + 1;
467 count
= sprintf(buf
, "%s %d\n",
468 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
469 bond
->params
.xmit_policy
) + 1;
475 static ssize_t
bonding_store_xmit_hash(struct device
*d
,
476 struct device_attribute
*attr
,
477 const char *buf
, size_t count
)
479 int new_value
, ret
= count
;
480 struct bonding
*bond
= to_bond(d
);
482 if (bond
->dev
->flags
& IFF_UP
) {
483 printk(KERN_ERR DRV_NAME
484 "%s: Interface is up. Unable to update xmit policy.\n",
490 if ((bond
->params
.mode
!= BOND_MODE_XOR
) &&
491 (bond
->params
.mode
!= BOND_MODE_8023AD
)) {
492 printk(KERN_ERR DRV_NAME
493 "%s: Transmit hash policy is irrelevant in this mode.\n",
499 new_value
= bond_parse_parm((char *)buf
, xmit_hashtype_tbl
);
501 printk(KERN_ERR DRV_NAME
502 ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
504 (int)strlen(buf
) - 1, buf
);
508 bond
->params
.xmit_policy
= new_value
;
509 bond_set_mode_ops(bond
, bond
->params
.mode
);
510 printk(KERN_INFO DRV_NAME
": %s: setting xmit hash policy to %s (%d).\n",
511 bond
->dev
->name
, xmit_hashtype_tbl
[new_value
].modename
, new_value
);
516 static DEVICE_ATTR(xmit_hash_policy
, S_IRUGO
| S_IWUSR
, bonding_show_xmit_hash
, bonding_store_xmit_hash
);
519 * Show and set arp_validate.
521 static ssize_t
bonding_show_arp_validate(struct device
*d
,
522 struct device_attribute
*attr
,
525 struct bonding
*bond
= to_bond(d
);
527 return sprintf(buf
, "%s %d\n",
528 arp_validate_tbl
[bond
->params
.arp_validate
].modename
,
529 bond
->params
.arp_validate
) + 1;
532 static ssize_t
bonding_store_arp_validate(struct device
*d
,
533 struct device_attribute
*attr
,
534 const char *buf
, size_t count
)
537 struct bonding
*bond
= to_bond(d
);
539 new_value
= bond_parse_parm((char *)buf
, arp_validate_tbl
);
541 printk(KERN_ERR DRV_NAME
542 ": %s: Ignoring invalid arp_validate value %s\n",
543 bond
->dev
->name
, buf
);
546 if (new_value
&& (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
)) {
547 printk(KERN_ERR DRV_NAME
548 ": %s: arp_validate only supported in active-backup mode.\n",
552 printk(KERN_INFO DRV_NAME
": %s: setting arp_validate to %s (%d).\n",
553 bond
->dev
->name
, arp_validate_tbl
[new_value
].modename
,
556 if (!bond
->params
.arp_validate
&& new_value
) {
557 bond_register_arp(bond
);
558 } else if (bond
->params
.arp_validate
&& !new_value
) {
559 bond_unregister_arp(bond
);
562 bond
->params
.arp_validate
= new_value
;
567 static DEVICE_ATTR(arp_validate
, S_IRUGO
| S_IWUSR
, bonding_show_arp_validate
, bonding_store_arp_validate
);
570 * Show and set the arp timer interval. There are two tricky bits
571 * here. First, if ARP monitoring is activated, then we must disable
572 * MII monitoring. Second, if the ARP timer isn't running, we must
575 static ssize_t
bonding_show_arp_interval(struct device
*d
,
576 struct device_attribute
*attr
,
579 struct bonding
*bond
= to_bond(d
);
581 return sprintf(buf
, "%d\n", bond
->params
.arp_interval
) + 1;
584 static ssize_t
bonding_store_arp_interval(struct device
*d
,
585 struct device_attribute
*attr
,
586 const char *buf
, size_t count
)
588 int new_value
, ret
= count
;
589 struct bonding
*bond
= to_bond(d
);
591 if (sscanf(buf
, "%d", &new_value
) != 1) {
592 printk(KERN_ERR DRV_NAME
593 ": %s: no arp_interval value specified.\n",
599 printk(KERN_ERR DRV_NAME
600 ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
601 bond
->dev
->name
, new_value
, INT_MAX
);
606 printk(KERN_INFO DRV_NAME
607 ": %s: Setting ARP monitoring interval to %d.\n",
608 bond
->dev
->name
, new_value
);
609 bond
->params
.arp_interval
= new_value
;
610 if (bond
->params
.miimon
) {
611 printk(KERN_INFO DRV_NAME
612 ": %s: ARP monitoring cannot be used with MII monitoring. "
613 "%s Disabling MII monitoring.\n",
614 bond
->dev
->name
, bond
->dev
->name
);
615 bond
->params
.miimon
= 0;
616 /* Kill MII timer, else it brings bond's link down */
617 if (bond
->arp_timer
.function
) {
618 printk(KERN_INFO DRV_NAME
619 ": %s: Kill MII timer, else it brings bond's link down...\n",
621 del_timer_sync(&bond
->mii_timer
);
624 if (!bond
->params
.arp_targets
[0]) {
625 printk(KERN_INFO DRV_NAME
626 ": %s: ARP monitoring has been set up, "
627 "but no ARP targets have been specified.\n",
630 if (bond
->dev
->flags
& IFF_UP
) {
631 /* If the interface is up, we may need to fire off
632 * the ARP timer. If the interface is down, the
633 * timer will get fired off when the open function
636 if (bond
->arp_timer
.function
) {
637 /* The timer's already set up, so fire it off */
638 mod_timer(&bond
->arp_timer
, jiffies
+ 1);
640 /* Set up the timer. */
641 init_timer(&bond
->arp_timer
);
642 bond
->arp_timer
.expires
= jiffies
+ 1;
643 bond
->arp_timer
.data
=
644 (unsigned long) bond
->dev
;
645 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
646 bond
->arp_timer
.function
=
648 &bond_activebackup_arp_mon
;
650 bond
->arp_timer
.function
=
652 &bond_loadbalance_arp_mon
;
654 add_timer(&bond
->arp_timer
);
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 res
--; /* eat the leftover space */
680 res
+= sprintf(buf
+ res
, "\n");
685 static ssize_t
bonding_store_arp_targets(struct device
*d
,
686 struct device_attribute
*attr
,
687 const char *buf
, size_t count
)
690 int i
= 0, done
= 0, ret
= count
;
691 struct bonding
*bond
= to_bond(d
);
694 targets
= bond
->params
.arp_targets
;
695 newtarget
= in_aton(buf
+ 1);
698 if ((newtarget
== 0) || (newtarget
== htonl(INADDR_BROADCAST
))) {
699 printk(KERN_ERR DRV_NAME
700 ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
701 bond
->dev
->name
, NIPQUAD(newtarget
));
705 /* look for an empty slot to put the target in, and check for dupes */
706 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
707 if (targets
[i
] == newtarget
) { /* duplicate */
708 printk(KERN_ERR DRV_NAME
709 ": %s: ARP target %u.%u.%u.%u is already present\n",
710 bond
->dev
->name
, NIPQUAD(newtarget
));
716 if (targets
[i
] == 0 && !done
) {
717 printk(KERN_INFO DRV_NAME
718 ": %s: adding ARP target %d.%d.%d.%d.\n",
719 bond
->dev
->name
, NIPQUAD(newtarget
));
721 targets
[i
] = newtarget
;
725 printk(KERN_ERR DRV_NAME
726 ": %s: ARP target table is full!\n",
733 else if (buf
[0] == '-') {
734 if ((newtarget
== 0) || (newtarget
== htonl(INADDR_BROADCAST
))) {
735 printk(KERN_ERR DRV_NAME
736 ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
737 bond
->dev
->name
, NIPQUAD(newtarget
));
742 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
743 if (targets
[i
] == newtarget
) {
744 printk(KERN_INFO DRV_NAME
745 ": %s: removing ARP target %d.%d.%d.%d.\n",
746 bond
->dev
->name
, NIPQUAD(newtarget
));
752 printk(KERN_INFO DRV_NAME
753 ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
754 bond
->dev
->name
, NIPQUAD(newtarget
));
760 printk(KERN_ERR DRV_NAME
": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
769 static DEVICE_ATTR(arp_ip_target
, S_IRUGO
| S_IWUSR
, bonding_show_arp_targets
, bonding_store_arp_targets
);
772 * Show and set the up and down delays. These must be multiples of the
773 * MII monitoring value, and are stored internally as the multiplier.
774 * Thus, we must translate to MS for the real world.
776 static ssize_t
bonding_show_downdelay(struct device
*d
,
777 struct device_attribute
*attr
,
780 struct bonding
*bond
= to_bond(d
);
782 return sprintf(buf
, "%d\n", bond
->params
.downdelay
* bond
->params
.miimon
) + 1;
785 static ssize_t
bonding_store_downdelay(struct device
*d
,
786 struct device_attribute
*attr
,
787 const char *buf
, size_t count
)
789 int new_value
, ret
= count
;
790 struct bonding
*bond
= to_bond(d
);
792 if (!(bond
->params
.miimon
)) {
793 printk(KERN_ERR DRV_NAME
794 ": %s: Unable to set down delay as MII monitoring is disabled\n",
800 if (sscanf(buf
, "%d", &new_value
) != 1) {
801 printk(KERN_ERR DRV_NAME
802 ": %s: no down delay value specified.\n",
808 printk(KERN_ERR DRV_NAME
809 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
810 bond
->dev
->name
, new_value
, 1, INT_MAX
);
814 if ((new_value
% bond
->params
.miimon
) != 0) {
815 printk(KERN_WARNING DRV_NAME
816 ": %s: Warning: down delay (%d) is not a multiple "
817 "of miimon (%d), delay rounded to %d ms\n",
818 bond
->dev
->name
, new_value
, bond
->params
.miimon
,
819 (new_value
/ bond
->params
.miimon
) *
820 bond
->params
.miimon
);
822 bond
->params
.downdelay
= new_value
/ bond
->params
.miimon
;
823 printk(KERN_INFO DRV_NAME
": %s: Setting down delay to %d.\n",
824 bond
->dev
->name
, bond
->params
.downdelay
* bond
->params
.miimon
);
831 static DEVICE_ATTR(downdelay
, S_IRUGO
| S_IWUSR
, bonding_show_downdelay
, bonding_store_downdelay
);
833 static ssize_t
bonding_show_updelay(struct device
*d
,
834 struct device_attribute
*attr
,
837 struct bonding
*bond
= to_bond(d
);
839 return sprintf(buf
, "%d\n", bond
->params
.updelay
* bond
->params
.miimon
) + 1;
843 static ssize_t
bonding_store_updelay(struct device
*d
,
844 struct device_attribute
*attr
,
845 const char *buf
, size_t count
)
847 int new_value
, ret
= count
;
848 struct bonding
*bond
= to_bond(d
);
850 if (!(bond
->params
.miimon
)) {
851 printk(KERN_ERR DRV_NAME
852 ": %s: Unable to set up delay as MII monitoring is disabled\n",
858 if (sscanf(buf
, "%d", &new_value
) != 1) {
859 printk(KERN_ERR DRV_NAME
860 ": %s: no up delay value specified.\n",
866 printk(KERN_ERR DRV_NAME
867 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
868 bond
->dev
->name
, new_value
, 1, INT_MAX
);
872 if ((new_value
% bond
->params
.miimon
) != 0) {
873 printk(KERN_WARNING DRV_NAME
874 ": %s: Warning: up delay (%d) is not a multiple "
875 "of miimon (%d), updelay rounded to %d ms\n",
876 bond
->dev
->name
, new_value
, bond
->params
.miimon
,
877 (new_value
/ bond
->params
.miimon
) *
878 bond
->params
.miimon
);
880 bond
->params
.updelay
= new_value
/ bond
->params
.miimon
;
881 printk(KERN_INFO DRV_NAME
": %s: Setting up delay to %d.\n",
882 bond
->dev
->name
, bond
->params
.updelay
* bond
->params
.miimon
);
889 static DEVICE_ATTR(updelay
, S_IRUGO
| S_IWUSR
, bonding_show_updelay
, bonding_store_updelay
);
892 * Show and set the LACP interval. Interface must be down, and the mode
893 * must be set to 802.3ad mode.
895 static ssize_t
bonding_show_lacp(struct device
*d
,
896 struct device_attribute
*attr
,
899 struct bonding
*bond
= to_bond(d
);
901 return sprintf(buf
, "%s %d\n",
902 bond_lacp_tbl
[bond
->params
.lacp_fast
].modename
,
903 bond
->params
.lacp_fast
) + 1;
906 static ssize_t
bonding_store_lacp(struct device
*d
,
907 struct device_attribute
*attr
,
908 const char *buf
, size_t count
)
910 int new_value
, ret
= count
;
911 struct bonding
*bond
= to_bond(d
);
913 if (bond
->dev
->flags
& IFF_UP
) {
914 printk(KERN_ERR DRV_NAME
915 ": %s: Unable to update LACP rate because interface is up.\n",
921 if (bond
->params
.mode
!= BOND_MODE_8023AD
) {
922 printk(KERN_ERR DRV_NAME
923 ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
929 new_value
= bond_parse_parm((char *)buf
, bond_lacp_tbl
);
931 if ((new_value
== 1) || (new_value
== 0)) {
932 bond
->params
.lacp_fast
= new_value
;
933 printk(KERN_INFO DRV_NAME
934 ": %s: Setting LACP rate to %s (%d).\n",
935 bond
->dev
->name
, bond_lacp_tbl
[new_value
].modename
, new_value
);
937 printk(KERN_ERR DRV_NAME
938 ": %s: Ignoring invalid LACP rate value %.*s.\n",
939 bond
->dev
->name
, (int)strlen(buf
) - 1, buf
);
945 static DEVICE_ATTR(lacp_rate
, S_IRUGO
| S_IWUSR
, bonding_show_lacp
, bonding_store_lacp
);
948 * Show and set the MII monitor interval. There are two tricky bits
949 * here. First, if MII monitoring is activated, then we must disable
950 * ARP monitoring. Second, if the timer isn't running, we must
953 static ssize_t
bonding_show_miimon(struct device
*d
,
954 struct device_attribute
*attr
,
957 struct bonding
*bond
= to_bond(d
);
959 return sprintf(buf
, "%d\n", bond
->params
.miimon
) + 1;
962 static ssize_t
bonding_store_miimon(struct device
*d
,
963 struct device_attribute
*attr
,
964 const char *buf
, size_t count
)
966 int new_value
, ret
= count
;
967 struct bonding
*bond
= to_bond(d
);
969 if (sscanf(buf
, "%d", &new_value
) != 1) {
970 printk(KERN_ERR DRV_NAME
971 ": %s: no miimon value specified.\n",
977 printk(KERN_ERR DRV_NAME
978 ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
979 bond
->dev
->name
, new_value
, 1, INT_MAX
);
983 printk(KERN_INFO DRV_NAME
984 ": %s: Setting MII monitoring interval to %d.\n",
985 bond
->dev
->name
, new_value
);
986 bond
->params
.miimon
= new_value
;
987 if(bond
->params
.updelay
)
988 printk(KERN_INFO DRV_NAME
989 ": %s: Note: Updating updelay (to %d) "
990 "since it is a multiple of the miimon value.\n",
992 bond
->params
.updelay
* bond
->params
.miimon
);
993 if(bond
->params
.downdelay
)
994 printk(KERN_INFO DRV_NAME
995 ": %s: Note: Updating downdelay (to %d) "
996 "since it is a multiple of the miimon value.\n",
998 bond
->params
.downdelay
* bond
->params
.miimon
);
999 if (bond
->params
.arp_interval
) {
1000 printk(KERN_INFO DRV_NAME
1001 ": %s: MII monitoring cannot be used with "
1002 "ARP monitoring. Disabling ARP monitoring...\n",
1004 bond
->params
.arp_interval
= 0;
1005 if (bond
->params
.arp_validate
) {
1006 bond_unregister_arp(bond
);
1007 bond
->params
.arp_validate
=
1008 BOND_ARP_VALIDATE_NONE
;
1010 /* Kill ARP timer, else it brings bond's link down */
1011 if (bond
->mii_timer
.function
) {
1012 printk(KERN_INFO DRV_NAME
1013 ": %s: Kill ARP timer, else it brings bond's link down...\n",
1015 del_timer_sync(&bond
->arp_timer
);
1019 if (bond
->dev
->flags
& IFF_UP
) {
1020 /* If the interface is up, we may need to fire off
1021 * the MII timer. If the interface is down, the
1022 * timer will get fired off when the open function
1025 if (bond
->mii_timer
.function
) {
1026 /* The timer's already set up, so fire it off */
1027 mod_timer(&bond
->mii_timer
, jiffies
+ 1);
1029 /* Set up the timer. */
1030 init_timer(&bond
->mii_timer
);
1031 bond
->mii_timer
.expires
= jiffies
+ 1;
1032 bond
->mii_timer
.data
=
1033 (unsigned long) bond
->dev
;
1034 bond
->mii_timer
.function
=
1035 (void *) &bond_mii_monitor
;
1036 add_timer(&bond
->mii_timer
);
1043 static DEVICE_ATTR(miimon
, S_IRUGO
| S_IWUSR
, bonding_show_miimon
, bonding_store_miimon
);
1046 * Show and set the primary slave. The store function is much
1047 * simpler than bonding_store_slaves function because it only needs to
1048 * handle one interface name.
1049 * The bond must be a mode that supports a primary for this be
1052 static ssize_t
bonding_show_primary(struct device
*d
,
1053 struct device_attribute
*attr
,
1057 struct bonding
*bond
= to_bond(d
);
1059 if (bond
->primary_slave
)
1060 count
= sprintf(buf
, "%s\n", bond
->primary_slave
->dev
->name
) + 1;
1062 count
= sprintf(buf
, "\n") + 1;
1067 static ssize_t
bonding_store_primary(struct device
*d
,
1068 struct device_attribute
*attr
,
1069 const char *buf
, size_t count
)
1072 struct slave
*slave
;
1073 struct bonding
*bond
= to_bond(d
);
1075 write_lock_bh(&bond
->lock
);
1076 if (!USES_PRIMARY(bond
->params
.mode
)) {
1077 printk(KERN_INFO DRV_NAME
1078 ": %s: Unable to set primary slave; %s is in mode %d\n",
1079 bond
->dev
->name
, bond
->dev
->name
, bond
->params
.mode
);
1081 bond_for_each_slave(bond
, slave
, i
) {
1083 (slave
->dev
->name
, buf
,
1084 strlen(slave
->dev
->name
)) == 0) {
1085 printk(KERN_INFO DRV_NAME
1086 ": %s: Setting %s as primary slave.\n",
1087 bond
->dev
->name
, slave
->dev
->name
);
1088 bond
->primary_slave
= slave
;
1089 bond_select_active_slave(bond
);
1094 /* if we got here, then we didn't match the name of any slave */
1096 if (strlen(buf
) == 0 || buf
[0] == '\n') {
1097 printk(KERN_INFO DRV_NAME
1098 ": %s: Setting primary slave to None.\n",
1100 bond
->primary_slave
= NULL
;
1101 bond_select_active_slave(bond
);
1103 printk(KERN_INFO DRV_NAME
1104 ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1105 bond
->dev
->name
, (int)strlen(buf
) - 1, buf
);
1109 write_unlock_bh(&bond
->lock
);
1112 static DEVICE_ATTR(primary
, S_IRUGO
| S_IWUSR
, bonding_show_primary
, bonding_store_primary
);
1115 * Show and set the use_carrier flag.
1117 static ssize_t
bonding_show_carrier(struct device
*d
,
1118 struct device_attribute
*attr
,
1121 struct bonding
*bond
= to_bond(d
);
1123 return sprintf(buf
, "%d\n", bond
->params
.use_carrier
) + 1;
1126 static ssize_t
bonding_store_carrier(struct device
*d
,
1127 struct device_attribute
*attr
,
1128 const char *buf
, size_t count
)
1130 int new_value
, ret
= count
;
1131 struct bonding
*bond
= to_bond(d
);
1134 if (sscanf(buf
, "%d", &new_value
) != 1) {
1135 printk(KERN_ERR DRV_NAME
1136 ": %s: no use_carrier value specified.\n",
1141 if ((new_value
== 0) || (new_value
== 1)) {
1142 bond
->params
.use_carrier
= new_value
;
1143 printk(KERN_INFO DRV_NAME
": %s: Setting use_carrier to %d.\n",
1144 bond
->dev
->name
, new_value
);
1146 printk(KERN_INFO DRV_NAME
1147 ": %s: Ignoring invalid use_carrier value %d.\n",
1148 bond
->dev
->name
, new_value
);
1153 static DEVICE_ATTR(use_carrier
, S_IRUGO
| S_IWUSR
, bonding_show_carrier
, bonding_store_carrier
);
1157 * Show and set currently active_slave.
1159 static ssize_t
bonding_show_active_slave(struct device
*d
,
1160 struct device_attribute
*attr
,
1164 struct bonding
*bond
= to_bond(d
);
1168 read_lock(&bond
->curr_slave_lock
);
1169 curr
= bond
->curr_active_slave
;
1170 read_unlock(&bond
->curr_slave_lock
);
1172 if (USES_PRIMARY(bond
->params
.mode
) && curr
)
1173 count
= sprintf(buf
, "%s\n", curr
->dev
->name
) + 1;
1175 count
= sprintf(buf
, "\n") + 1;
1179 static ssize_t
bonding_store_active_slave(struct device
*d
,
1180 struct device_attribute
*attr
,
1181 const char *buf
, size_t count
)
1184 struct slave
*slave
;
1185 struct slave
*old_active
= NULL
;
1186 struct slave
*new_active
= NULL
;
1187 struct bonding
*bond
= to_bond(d
);
1189 write_lock_bh(&bond
->lock
);
1190 if (!USES_PRIMARY(bond
->params
.mode
)) {
1191 printk(KERN_INFO DRV_NAME
1192 ": %s: Unable to change active slave; %s is in mode %d\n",
1193 bond
->dev
->name
, bond
->dev
->name
, bond
->params
.mode
);
1195 bond_for_each_slave(bond
, slave
, i
) {
1197 (slave
->dev
->name
, buf
,
1198 strlen(slave
->dev
->name
)) == 0) {
1199 old_active
= bond
->curr_active_slave
;
1201 if (new_active
== old_active
) {
1203 printk(KERN_INFO DRV_NAME
1204 ": %s: %s is already the current active slave.\n",
1205 bond
->dev
->name
, slave
->dev
->name
);
1211 (new_active
->link
== BOND_LINK_UP
) &&
1212 IS_UP(new_active
->dev
)) {
1213 printk(KERN_INFO DRV_NAME
1214 ": %s: Setting %s as active slave.\n",
1215 bond
->dev
->name
, slave
->dev
->name
);
1216 bond_change_active_slave(bond
, new_active
);
1219 printk(KERN_INFO DRV_NAME
1220 ": %s: Could not set %s as active slave; "
1221 "either %s is down or the link is down.\n",
1222 bond
->dev
->name
, slave
->dev
->name
,
1230 /* if we got here, then we didn't match the name of any slave */
1232 if (strlen(buf
) == 0 || buf
[0] == '\n') {
1233 printk(KERN_INFO DRV_NAME
1234 ": %s: Setting active slave to None.\n",
1236 bond
->primary_slave
= NULL
;
1237 bond_select_active_slave(bond
);
1239 printk(KERN_INFO DRV_NAME
1240 ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1241 bond
->dev
->name
, (int)strlen(buf
) - 1, buf
);
1245 write_unlock_bh(&bond
->lock
);
1249 static DEVICE_ATTR(active_slave
, S_IRUGO
| S_IWUSR
, bonding_show_active_slave
, bonding_store_active_slave
);
1253 * Show link status of the bond interface.
1255 static ssize_t
bonding_show_mii_status(struct device
*d
,
1256 struct device_attribute
*attr
,
1260 struct bonding
*bond
= to_bond(d
);
1262 read_lock(&bond
->curr_slave_lock
);
1263 curr
= bond
->curr_active_slave
;
1264 read_unlock(&bond
->curr_slave_lock
);
1266 return sprintf(buf
, "%s\n", (curr
) ? "up" : "down") + 1;
1268 static DEVICE_ATTR(mii_status
, S_IRUGO
, bonding_show_mii_status
, NULL
);
1272 * Show current 802.3ad aggregator ID.
1274 static ssize_t
bonding_show_ad_aggregator(struct device
*d
,
1275 struct device_attribute
*attr
,
1279 struct bonding
*bond
= to_bond(d
);
1281 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1282 struct ad_info ad_info
;
1283 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0 : ad_info
.aggregator_id
) + 1;
1286 count
= sprintf(buf
, "\n") + 1;
1290 static DEVICE_ATTR(ad_aggregator
, S_IRUGO
, bonding_show_ad_aggregator
, NULL
);
1294 * Show number of active 802.3ad ports.
1296 static ssize_t
bonding_show_ad_num_ports(struct device
*d
,
1297 struct device_attribute
*attr
,
1301 struct bonding
*bond
= to_bond(d
);
1303 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1304 struct ad_info ad_info
;
1305 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0: ad_info
.ports
) + 1;
1308 count
= sprintf(buf
, "\n") + 1;
1312 static DEVICE_ATTR(ad_num_ports
, S_IRUGO
, bonding_show_ad_num_ports
, NULL
);
1316 * Show current 802.3ad actor key.
1318 static ssize_t
bonding_show_ad_actor_key(struct device
*d
,
1319 struct device_attribute
*attr
,
1323 struct bonding
*bond
= to_bond(d
);
1325 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1326 struct ad_info ad_info
;
1327 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0 : ad_info
.actor_key
) + 1;
1330 count
= sprintf(buf
, "\n") + 1;
1334 static DEVICE_ATTR(ad_actor_key
, S_IRUGO
, bonding_show_ad_actor_key
, NULL
);
1338 * Show current 802.3ad partner key.
1340 static ssize_t
bonding_show_ad_partner_key(struct device
*d
,
1341 struct device_attribute
*attr
,
1345 struct bonding
*bond
= to_bond(d
);
1347 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1348 struct ad_info ad_info
;
1349 count
= sprintf(buf
, "%d\n", (bond_3ad_get_active_agg_info(bond
, &ad_info
)) ? 0 : ad_info
.partner_key
) + 1;
1352 count
= sprintf(buf
, "\n") + 1;
1356 static DEVICE_ATTR(ad_partner_key
, S_IRUGO
, bonding_show_ad_partner_key
, NULL
);
1360 * Show current 802.3ad partner mac.
1362 static ssize_t
bonding_show_ad_partner_mac(struct device
*d
,
1363 struct device_attribute
*attr
,
1367 struct bonding
*bond
= to_bond(d
);
1368 DECLARE_MAC_BUF(mac
);
1370 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1371 struct ad_info ad_info
;
1372 if (!bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
1373 count
= sprintf(buf
,"%s\n",
1374 print_mac(mac
, ad_info
.partner_system
))
1379 count
= sprintf(buf
, "\n") + 1;
1383 static DEVICE_ATTR(ad_partner_mac
, S_IRUGO
, bonding_show_ad_partner_mac
, NULL
);
1387 static struct attribute
*per_bond_attrs
[] = {
1388 &dev_attr_slaves
.attr
,
1389 &dev_attr_mode
.attr
,
1390 &dev_attr_arp_validate
.attr
,
1391 &dev_attr_arp_interval
.attr
,
1392 &dev_attr_arp_ip_target
.attr
,
1393 &dev_attr_downdelay
.attr
,
1394 &dev_attr_updelay
.attr
,
1395 &dev_attr_lacp_rate
.attr
,
1396 &dev_attr_xmit_hash_policy
.attr
,
1397 &dev_attr_miimon
.attr
,
1398 &dev_attr_primary
.attr
,
1399 &dev_attr_use_carrier
.attr
,
1400 &dev_attr_active_slave
.attr
,
1401 &dev_attr_mii_status
.attr
,
1402 &dev_attr_ad_aggregator
.attr
,
1403 &dev_attr_ad_num_ports
.attr
,
1404 &dev_attr_ad_actor_key
.attr
,
1405 &dev_attr_ad_partner_key
.attr
,
1406 &dev_attr_ad_partner_mac
.attr
,
1410 static struct attribute_group bonding_group
= {
1412 .attrs
= per_bond_attrs
,
1416 * Initialize sysfs. This sets up the bonding_masters file in
1419 int bond_create_sysfs(void)
1422 struct bonding
*firstbond
;
1424 init_rwsem(&bonding_rwsem
);
1426 /* get the netdev class pointer */
1427 firstbond
= container_of(bond_dev_list
.next
, struct bonding
, bond_list
);
1431 netdev_class
= firstbond
->dev
->dev
.class;
1435 ret
= class_create_file(netdev_class
, &class_attr_bonding_masters
);
1437 * Permit multiple loads of the module by ignoring failures to
1438 * create the bonding_masters sysfs file. Bonding devices
1439 * created by second or subsequent loads of the module will
1440 * not be listed in, or controllable by, bonding_masters, but
1441 * will have the usual "bonding" sysfs directory.
1443 * This is done to preserve backwards compatibility for
1444 * initscripts/sysconfig, which load bonding multiple times to
1445 * configure multiple bonding devices.
1447 if (ret
== -EEXIST
) {
1448 netdev_class
= NULL
;
1457 * Remove /sys/class/net/bonding_masters.
1459 void bond_destroy_sysfs(void)
1462 class_remove_file(netdev_class
, &class_attr_bonding_masters
);
1466 * Initialize sysfs for each bond. This sets up and registers
1467 * the 'bondctl' directory for each individual bond under /sys/class/net.
1469 int bond_create_sysfs_entry(struct bonding
*bond
)
1471 struct net_device
*dev
= bond
->dev
;
1474 err
= sysfs_create_group(&(dev
->dev
.kobj
), &bonding_group
);
1476 printk(KERN_EMERG
"eek! didn't create group!\n");
1479 if (expected_refcount
< 1)
1480 expected_refcount
= atomic_read(&bond
->dev
->dev
.kobj
.kref
.refcount
);
1485 * Remove sysfs entries for each bond.
1487 void bond_destroy_sysfs_entry(struct bonding
*bond
)
1489 struct net_device
*dev
= bond
->dev
;
1491 sysfs_remove_group(&(dev
->dev
.kobj
), &bonding_group
);