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.arp_interval)
624 bond->dev->priv_flags |= IFF_MASTER_ARPMON;
625 if (bond->params.miimon) {
626 printk(KERN_INFO DRV_NAME
627 ": %s: ARP monitoring cannot be used with MII monitoring. "
628 "%s Disabling MII monitoring.\n",
629 bond->dev->name, bond->dev->name);
630 bond->params.miimon = 0;
631 if (delayed_work_pending(&bond->mii_work)) {
632 cancel_delayed_work(&bond->mii_work);
633 flush_workqueue(bond->wq);
636 if (!bond->params.arp_targets[0]) {
637 printk(KERN_INFO DRV_NAME
638 ": %s: ARP monitoring has been set up, "
639 "but no ARP targets have been specified.\n",
642 if (bond->dev->flags & IFF_UP) {
643 /* If the interface is up, we may need to fire off
644 * the ARP timer. If the interface is down, the
645 * timer will get fired off when the open function
648 if (!delayed_work_pending(&bond->arp_work)) {
649 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
650 INIT_DELAYED_WORK(&bond->arp_work,
651 bond_activebackup_arp_mon);
653 INIT_DELAYED_WORK(&bond->arp_work,
654 bond_loadbalance_arp_mon);
656 queue_delayed_work(bond->wq, &bond->arp_work, 0);
663 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
666 * Show and set the arp targets.
668 static ssize_t bonding_show_arp_targets(struct device *d,
669 struct device_attribute *attr,
673 struct bonding *bond = to_bond(d);
675 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
676 if (bond->params.arp_targets[i])
677 res += sprintf(buf + res, "%pI4 ",
678 &bond->params.arp_targets[i]);
681 buf[res-1] = '\n'; /* eat the leftover space */
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 %pI4 specified for addition\n",
701 bond->dev->name, &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 %pI4 is already present\n",
710 bond->dev->name, &newtarget);
716 if (targets[i] == 0 && !done) {
717 printk(KERN_INFO DRV_NAME
718 ": %s: adding ARP target %pI4.\n",
719 bond->dev->name, &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 %pI4 specified for removal\n",
737 bond->dev->name, &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 %pI4.\n",
746 bond->dev->name, &newtarget);
752 printk(KERN_INFO DRV_NAME
753 ": %s: unable to remove nonexistent ARP target %pI4.\n",
754 bond->dev->name, &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);
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);
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);
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(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 number of grat ARP to send after a failover event.
950 static ssize_t bonding_show_n_grat_arp(struct device *d,
951 struct device_attribute *attr,
954 struct bonding *bond = to_bond(d);
956 return sprintf(buf, "%d\n", bond->params.num_grat_arp);
959 static ssize_t bonding_store_n_grat_arp(struct device *d,
960 struct device_attribute *attr,
961 const char *buf, size_t count)
963 int new_value, ret = count;
964 struct bonding *bond = to_bond(d);
966 if (sscanf(buf, "%d", &new_value) != 1) {
967 printk(KERN_ERR DRV_NAME
968 ": %s: no num_grat_arp value specified.\n",
973 if (new_value < 0 || new_value > 255) {
974 printk(KERN_ERR DRV_NAME
975 ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
976 bond->dev->name, new_value);
980 bond->params.num_grat_arp = new_value;
985 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 number of unsolicted NA's to send after a failover event.
990 static ssize_t bonding_show_n_unsol_na(struct device *d,
991 struct device_attribute *attr,
994 struct bonding *bond = to_bond(d);
996 return sprintf(buf, "%d\n", bond->params.num_unsol_na);
999 static ssize_t bonding_store_n_unsol_na(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 num_unsol_na value specified.\n",
1013 if (new_value < 0 || new_value > 255) {
1014 printk(KERN_ERR DRV_NAME
1015 ": %s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
1016 bond->dev->name, new_value);
1020 bond->params.num_unsol_na = new_value;
1025 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR, bonding_show_n_unsol_na, bonding_store_n_unsol_na);
1028 * Show and set the MII monitor interval. There are two tricky bits
1029 * here. First, if MII monitoring is activated, then we must disable
1030 * ARP monitoring. Second, if the timer isn't running, we must
1033 static ssize_t bonding_show_miimon(struct device *d,
1034 struct device_attribute *attr,
1037 struct bonding *bond = to_bond(d);
1039 return sprintf(buf, "%d\n", bond->params.miimon);
1042 static ssize_t bonding_store_miimon(struct device *d,
1043 struct device_attribute *attr,
1044 const char *buf, size_t count)
1046 int new_value, ret = count;
1047 struct bonding *bond = to_bond(d);
1049 if (sscanf(buf, "%d", &new_value) != 1) {
1050 printk(KERN_ERR DRV_NAME
1051 ": %s: no miimon value specified.\n",
1056 if (new_value < 0) {
1057 printk(KERN_ERR DRV_NAME
1058 ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1059 bond->dev->name, new_value, 1, INT_MAX);
1063 printk(KERN_INFO DRV_NAME
1064 ": %s: Setting MII monitoring interval to %d.\n",
1065 bond->dev->name, new_value);
1066 bond->params.miimon = new_value;
1067 if(bond->params.updelay)
1068 printk(KERN_INFO DRV_NAME
1069 ": %s: Note: Updating updelay (to %d) "
1070 "since it is a multiple of the miimon value.\n",
1072 bond->params.updelay * bond->params.miimon);
1073 if(bond->params.downdelay)
1074 printk(KERN_INFO DRV_NAME
1075 ": %s: Note: Updating downdelay (to %d) "
1076 "since it is a multiple of the miimon value.\n",
1078 bond->params.downdelay * bond->params.miimon);
1079 if (bond->params.arp_interval) {
1080 printk(KERN_INFO DRV_NAME
1081 ": %s: MII monitoring cannot be used with "
1082 "ARP monitoring. Disabling ARP monitoring...\n",
1084 bond->params.arp_interval = 0;
1085 bond->dev->priv_flags &= ~IFF_MASTER_ARPMON;
1086 if (bond->params.arp_validate) {
1087 bond_unregister_arp(bond);
1088 bond->params.arp_validate =
1089 BOND_ARP_VALIDATE_NONE;
1091 if (delayed_work_pending(&bond->arp_work)) {
1092 cancel_delayed_work(&bond->arp_work);
1093 flush_workqueue(bond->wq);
1097 if (bond->dev->flags & IFF_UP) {
1098 /* If the interface is up, we may need to fire off
1099 * the MII timer. If the interface is down, the
1100 * timer will get fired off when the open function
1103 if (!delayed_work_pending(&bond->mii_work)) {
1104 INIT_DELAYED_WORK(&bond->mii_work,
1106 queue_delayed_work(bond->wq,
1107 &bond->mii_work, 0);
1114 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1117 * Show and set the primary slave. The store function is much
1118 * simpler than bonding_store_slaves function because it only needs to
1119 * handle one interface name.
1120 * The bond must be a mode that supports a primary for this be
1123 static ssize_t bonding_show_primary(struct device *d,
1124 struct device_attribute *attr,
1128 struct bonding *bond = to_bond(d);
1130 if (bond->primary_slave)
1131 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1136 static ssize_t bonding_store_primary(struct device *d,
1137 struct device_attribute *attr,
1138 const char *buf, size_t count)
1141 struct slave *slave;
1142 struct bonding *bond = to_bond(d);
1145 read_lock(&bond->lock);
1146 write_lock_bh(&bond->curr_slave_lock);
1148 if (!USES_PRIMARY(bond->params.mode)) {
1149 printk(KERN_INFO DRV_NAME
1150 ": %s: Unable to set primary slave; %s is in mode %d\n",
1151 bond->dev->name, bond->dev->name, bond->params.mode);
1153 bond_for_each_slave(bond, slave, i) {
1155 (slave->dev->name, buf,
1156 strlen(slave->dev->name)) == 0) {
1157 printk(KERN_INFO DRV_NAME
1158 ": %s: Setting %s as primary slave.\n",
1159 bond->dev->name, slave->dev->name);
1160 bond->primary_slave = slave;
1161 bond_select_active_slave(bond);
1166 /* if we got here, then we didn't match the name of any slave */
1168 if (strlen(buf) == 0 || buf[0] == '\n') {
1169 printk(KERN_INFO DRV_NAME
1170 ": %s: Setting primary slave to None.\n",
1172 bond->primary_slave = NULL;
1173 bond_select_active_slave(bond);
1175 printk(KERN_INFO DRV_NAME
1176 ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1177 bond->dev->name, (int)strlen(buf) - 1, buf);
1181 write_unlock_bh(&bond->curr_slave_lock);
1182 read_unlock(&bond->lock);
1187 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1190 * Show and set the use_carrier flag.
1192 static ssize_t bonding_show_carrier(struct device *d,
1193 struct device_attribute *attr,
1196 struct bonding *bond = to_bond(d);
1198 return sprintf(buf, "%d\n", bond->params.use_carrier);
1201 static ssize_t bonding_store_carrier(struct device *d,
1202 struct device_attribute *attr,
1203 const char *buf, size_t count)
1205 int new_value, ret = count;
1206 struct bonding *bond = to_bond(d);
1209 if (sscanf(buf, "%d", &new_value) != 1) {
1210 printk(KERN_ERR DRV_NAME
1211 ": %s: no use_carrier value specified.\n",
1216 if ((new_value == 0) || (new_value == 1)) {
1217 bond->params.use_carrier = new_value;
1218 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1219 bond->dev->name, new_value);
1221 printk(KERN_INFO DRV_NAME
1222 ": %s: Ignoring invalid use_carrier value %d.\n",
1223 bond->dev->name, new_value);
1228 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1232 * Show and set currently active_slave.
1234 static ssize_t bonding_show_active_slave(struct device *d,
1235 struct device_attribute *attr,
1239 struct bonding *bond = to_bond(d);
1242 read_lock(&bond->curr_slave_lock);
1243 curr = bond->curr_active_slave;
1244 read_unlock(&bond->curr_slave_lock);
1246 if (USES_PRIMARY(bond->params.mode) && curr)
1247 count = sprintf(buf, "%s\n", curr->dev->name);
1251 static ssize_t bonding_store_active_slave(struct device *d,
1252 struct device_attribute *attr,
1253 const char *buf, size_t count)
1256 struct slave *slave;
1257 struct slave *old_active = NULL;
1258 struct slave *new_active = NULL;
1259 struct bonding *bond = to_bond(d);
1262 read_lock(&bond->lock);
1263 write_lock_bh(&bond->curr_slave_lock);
1265 if (!USES_PRIMARY(bond->params.mode)) {
1266 printk(KERN_INFO DRV_NAME
1267 ": %s: Unable to change active slave; %s is in mode %d\n",
1268 bond->dev->name, bond->dev->name, bond->params.mode);
1270 bond_for_each_slave(bond, slave, i) {
1272 (slave->dev->name, buf,
1273 strlen(slave->dev->name)) == 0) {
1274 old_active = bond->curr_active_slave;
1276 if (new_active == old_active) {
1278 printk(KERN_INFO DRV_NAME
1279 ": %s: %s is already the current active slave.\n",
1280 bond->dev->name, slave->dev->name);
1286 (new_active->link == BOND_LINK_UP) &&
1287 IS_UP(new_active->dev)) {
1288 printk(KERN_INFO DRV_NAME
1289 ": %s: Setting %s as active slave.\n",
1290 bond->dev->name, slave->dev->name);
1291 bond_change_active_slave(bond, new_active);
1294 printk(KERN_INFO DRV_NAME
1295 ": %s: Could not set %s as active slave; "
1296 "either %s is down or the link is down.\n",
1297 bond->dev->name, slave->dev->name,
1305 /* if we got here, then we didn't match the name of any slave */
1307 if (strlen(buf) == 0 || buf[0] == '\n') {
1308 printk(KERN_INFO DRV_NAME
1309 ": %s: Setting active slave to None.\n",
1311 bond->primary_slave = NULL;
1312 bond_select_active_slave(bond);
1314 printk(KERN_INFO DRV_NAME
1315 ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1316 bond->dev->name, (int)strlen(buf) - 1, buf);
1320 write_unlock_bh(&bond->curr_slave_lock);
1321 read_unlock(&bond->lock);
1327 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1331 * Show link status of the bond interface.
1333 static ssize_t bonding_show_mii_status(struct device *d,
1334 struct device_attribute *attr,
1338 struct bonding *bond = to_bond(d);
1340 read_lock(&bond->curr_slave_lock);
1341 curr = bond->curr_active_slave;
1342 read_unlock(&bond->curr_slave_lock);
1344 return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1346 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1350 * Show current 802.3ad aggregator ID.
1352 static ssize_t bonding_show_ad_aggregator(struct device *d,
1353 struct device_attribute *attr,
1357 struct bonding *bond = to_bond(d);
1359 if (bond->params.mode == BOND_MODE_8023AD) {
1360 struct ad_info ad_info;
1361 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.aggregator_id);
1366 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1370 * Show number of active 802.3ad ports.
1372 static ssize_t bonding_show_ad_num_ports(struct device *d,
1373 struct device_attribute *attr,
1377 struct bonding *bond = to_bond(d);
1379 if (bond->params.mode == BOND_MODE_8023AD) {
1380 struct ad_info ad_info;
1381 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0: ad_info.ports);
1386 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1390 * Show current 802.3ad actor key.
1392 static ssize_t bonding_show_ad_actor_key(struct device *d,
1393 struct device_attribute *attr,
1397 struct bonding *bond = to_bond(d);
1399 if (bond->params.mode == BOND_MODE_8023AD) {
1400 struct ad_info ad_info;
1401 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.actor_key);
1406 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1410 * Show current 802.3ad partner key.
1412 static ssize_t bonding_show_ad_partner_key(struct device *d,
1413 struct device_attribute *attr,
1417 struct bonding *bond = to_bond(d);
1419 if (bond->params.mode == BOND_MODE_8023AD) {
1420 struct ad_info ad_info;
1421 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.partner_key);
1426 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1430 * Show current 802.3ad partner mac.
1432 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1433 struct device_attribute *attr,
1437 struct bonding *bond = to_bond(d);
1439 if (bond->params.mode == BOND_MODE_8023AD) {
1440 struct ad_info ad_info;
1441 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1442 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1448 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1452 static struct attribute *per_bond_attrs[] = {
1453 &dev_attr_slaves.attr,
1454 &dev_attr_mode.attr,
1455 &dev_attr_fail_over_mac.attr,
1456 &dev_attr_arp_validate.attr,
1457 &dev_attr_arp_interval.attr,
1458 &dev_attr_arp_ip_target.attr,
1459 &dev_attr_downdelay.attr,
1460 &dev_attr_updelay.attr,
1461 &dev_attr_lacp_rate.attr,
1462 &dev_attr_xmit_hash_policy.attr,
1463 &dev_attr_num_grat_arp.attr,
1464 &dev_attr_num_unsol_na.attr,
1465 &dev_attr_miimon.attr,
1466 &dev_attr_primary.attr,
1467 &dev_attr_use_carrier.attr,
1468 &dev_attr_active_slave.attr,
1469 &dev_attr_mii_status.attr,
1470 &dev_attr_ad_aggregator.attr,
1471 &dev_attr_ad_num_ports.attr,
1472 &dev_attr_ad_actor_key.attr,
1473 &dev_attr_ad_partner_key.attr,
1474 &dev_attr_ad_partner_mac.attr,
1478 static struct attribute_group bonding_group = {
1480 .attrs = per_bond_attrs,
1484 * Initialize sysfs. This sets up the bonding_masters file in
1487 int bond_create_sysfs(void)
1491 ret = netdev_class_create_file(&class_attr_bonding_masters);
1493 * Permit multiple loads of the module by ignoring failures to
1494 * create the bonding_masters sysfs file. Bonding devices
1495 * created by second or subsequent loads of the module will
1496 * not be listed in, or controllable by, bonding_masters, but
1497 * will have the usual "bonding" sysfs directory.
1499 * This is done to preserve backwards compatibility for
1500 * initscripts/sysconfig, which load bonding multiple times to
1501 * configure multiple bonding devices.
1503 if (ret == -EEXIST) {
1504 /* Is someone being kinky and naming a device bonding_master? */
1505 if (__dev_get_by_name(&init_net,
1506 class_attr_bonding_masters.attr.name))
1508 "network device named %s already exists in sysfs",
1509 class_attr_bonding_masters.attr.name);
1517 * Remove /sys/class/net/bonding_masters.
1519 void bond_destroy_sysfs(void)
1521 netdev_class_remove_file(&class_attr_bonding_masters);
1525 * Initialize sysfs for each bond. This sets up and registers
1526 * the 'bondctl' directory for each individual bond under /sys/class/net.
1528 int bond_create_sysfs_entry(struct bonding *bond)
1530 struct net_device *dev = bond->dev;
1533 err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1535 printk(KERN_EMERG "eek! didn't create group!\n");
1538 if (expected_refcount < 1)
1539 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1544 * Remove sysfs entries for each bond.
1546 void bond_destroy_sysfs_entry(struct bonding *bond)
1548 struct net_device *dev = bond->dev;
1550 sysfs_remove_group(&(dev->dev.kobj), &bonding_group);