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 static struct class *netdev_class;
57 /*--------------------------- Data Structures -----------------------------*/
59 /* Bonding sysfs lock. Why can't we just use the subsystem lock?
60 * Because kobject_register tries to acquire the subsystem lock. If
61 * we already hold the lock (which we would if the user was creating
62 * a new bond through the sysfs interface), we deadlock.
63 * This lock is only needed when deleting a bond - we need to make sure
64 * that we don't collide with an ongoing ioctl.
67 struct rw_semaphore bonding_rwsem;
72 /*------------------------------ Functions --------------------------------*/
75 * "show" function for the bond_masters attribute.
76 * The class parameter is ignored.
78 static ssize_t bonding_show_bonds(struct class *cls, char *buf)
83 down_read(&(bonding_rwsem));
85 list_for_each_entry(bond, &bond_dev_list, bond_list) {
86 if (res > (PAGE_SIZE - IFNAMSIZ)) {
87 /* not enough space for another interface name */
88 if ((PAGE_SIZE - res) > 10)
90 res += sprintf(buf + res, "++more++ ");
93 res += sprintf(buf + res, "%s ", bond->dev->name);
96 buf[res-1] = '\n'; /* eat the leftover space */
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;
116 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
117 ifname = command + 1;
118 if ((strlen(command) <= 1) ||
119 !dev_valid_name(ifname))
122 if (command[0] == '+') {
123 printk(KERN_INFO DRV_NAME
124 ": %s is being created...\n", ifname);
125 rv = bond_create(ifname, &bonding_defaults);
127 printk(KERN_INFO DRV_NAME ": Bond creation failed.\n");
133 if (command[0] == '-') {
135 down_write(&bonding_rwsem);
137 list_for_each_entry(bond, &bond_dev_list, bond_list)
138 if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
139 /* check the ref count on the bond's kobject.
140 * If it's > expected, then there's a file open,
141 * and we have to fail.
143 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
144 > expected_refcount){
145 printk(KERN_INFO DRV_NAME
146 ": Unable remove bond %s due to open references.\n",
151 printk(KERN_INFO DRV_NAME
152 ": %s is being deleted...\n",
158 printk(KERN_ERR DRV_NAME
159 ": unable to delete non-existent bond %s\n", ifname);
165 printk(KERN_ERR DRV_NAME
166 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
170 up_write(&bonding_rwsem);
173 /* Always return either count or an error. If you return 0, you'll
174 * get called forever, which is bad.
179 /* class attribute for bond_masters file. This ends up in /sys/class/net */
180 static CLASS_ATTR(bonding_masters, S_IWUSR | S_IRUGO,
181 bonding_show_bonds, bonding_store_bonds);
183 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
185 char linkname[IFNAMSIZ+7];
188 /* first, create a link from the slave back to the master */
189 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
193 /* next, create a link from the master to the slave */
194 sprintf(linkname,"slave_%s",slave->name);
195 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
201 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
203 char linkname[IFNAMSIZ+7];
205 sysfs_remove_link(&(slave->dev.kobj), "master");
206 sprintf(linkname,"slave_%s",slave->name);
207 sysfs_remove_link(&(master->dev.kobj), linkname);
212 * Show the slaves in the current bond.
214 static ssize_t bonding_show_slaves(struct device *d,
215 struct device_attribute *attr, char *buf)
219 struct bonding *bond = to_bond(d);
221 read_lock(&bond->lock);
222 bond_for_each_slave(bond, slave, i) {
223 if (res > (PAGE_SIZE - IFNAMSIZ)) {
224 /* not enough space for another interface name */
225 if ((PAGE_SIZE - res) > 10)
226 res = PAGE_SIZE - 10;
227 res += sprintf(buf + res, "++more++ ");
230 res += sprintf(buf + res, "%s ", slave->dev->name);
232 read_unlock(&bond->lock);
234 buf[res-1] = '\n'; /* eat the leftover space */
239 * Set the slaves in the current bond. The bond interface must be
240 * up for this to succeed.
241 * This function is largely the same flow as bonding_update_bonds().
243 static ssize_t bonding_store_slaves(struct device *d,
244 struct device_attribute *attr,
245 const char *buffer, size_t count)
247 char command[IFNAMSIZ + 1] = { 0, };
249 int i, res, found, ret = count;
252 struct net_device *dev = NULL;
253 struct bonding *bond = to_bond(d);
255 /* Quick sanity check -- is the bond interface up? */
256 if (!(bond->dev->flags & IFF_UP)) {
257 printk(KERN_WARNING DRV_NAME
258 ": %s: doing slave updates when interface is down.\n",
262 /* Note: We can't hold bond->lock here, as bond_create grabs it. */
265 down_write(&(bonding_rwsem));
267 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
268 ifname = command + 1;
269 if ((strlen(command) <= 1) ||
270 !dev_valid_name(ifname))
273 if (command[0] == '+') {
275 /* Got a slave name in ifname. Is it already in the list? */
277 read_lock(&bond->lock);
278 bond_for_each_slave(bond, slave, i)
279 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
280 printk(KERN_ERR DRV_NAME
281 ": %s: Interface %s is already enslaved!\n",
282 bond->dev->name, ifname);
284 read_unlock(&bond->lock);
288 read_unlock(&bond->lock);
289 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
290 bond->dev->name, ifname);
291 dev = dev_get_by_name(&init_net, ifname);
293 printk(KERN_INFO DRV_NAME
294 ": %s: Interface %s does not exist!\n",
295 bond->dev->name, ifname);
302 if (dev->flags & IFF_UP) {
303 printk(KERN_ERR DRV_NAME
304 ": %s: Error: Unable to enslave %s "
305 "because it is already up.\n",
306 bond->dev->name, dev->name);
310 /* If this is the first slave, then we need to set
311 the master's hardware address to be the same as the
313 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
314 memcpy(bond->dev->dev_addr, dev->dev_addr,
318 /* Set the slave's MTU to match the bond */
319 original_mtu = dev->mtu;
320 if (dev->mtu != bond->dev->mtu) {
321 if (dev->change_mtu) {
322 res = dev->change_mtu(dev,
329 dev->mtu = bond->dev->mtu;
332 res = bond_enslave(bond->dev, dev);
333 bond_for_each_slave(bond, slave, i)
334 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
335 slave->original_mtu = original_mtu;
342 if (command[0] == '-') {
345 bond_for_each_slave(bond, slave, i)
346 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
348 original_mtu = slave->original_mtu;
352 printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
353 bond->dev->name, dev->name);
354 if (bond->setup_by_slave)
355 res = bond_release_and_destroy(bond->dev, dev);
357 res = bond_release(bond->dev, dev);
362 /* set the slave MTU to the default */
363 if (dev->change_mtu) {
364 dev->change_mtu(dev, original_mtu);
366 dev->mtu = original_mtu;
370 printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
371 ifname, bond->dev->name);
378 printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
382 up_write(&(bonding_rwsem));
387 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
390 * Show and set the bonding mode. The bond interface must be down to
393 static ssize_t bonding_show_mode(struct device *d,
394 struct device_attribute *attr, char *buf)
396 struct bonding *bond = to_bond(d);
398 return sprintf(buf, "%s %d\n",
399 bond_mode_tbl[bond->params.mode].modename,
403 static ssize_t bonding_store_mode(struct device *d,
404 struct device_attribute *attr,
405 const char *buf, size_t count)
407 int new_value, ret = count;
408 struct bonding *bond = to_bond(d);
410 if (bond->dev->flags & IFF_UP) {
411 printk(KERN_ERR DRV_NAME
412 ": unable to update mode of %s because interface is up.\n",
418 new_value = bond_parse_parm(buf, bond_mode_tbl);
420 printk(KERN_ERR DRV_NAME
421 ": %s: Ignoring invalid mode value %.*s.\n",
423 (int)strlen(buf) - 1, buf);
427 if (bond->params.mode == BOND_MODE_8023AD)
428 bond_unset_master_3ad_flags(bond);
430 if (bond->params.mode == BOND_MODE_ALB)
431 bond_unset_master_alb_flags(bond);
433 bond->params.mode = new_value;
434 bond_set_mode_ops(bond, bond->params.mode);
435 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
436 bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
441 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
444 * Show and set the bonding transmit hash method. The bond interface must be down to
445 * change the xmit hash policy.
447 static ssize_t bonding_show_xmit_hash(struct device *d,
448 struct device_attribute *attr,
451 struct bonding *bond = to_bond(d);
453 return sprintf(buf, "%s %d\n",
454 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
455 bond->params.xmit_policy);
458 static ssize_t bonding_store_xmit_hash(struct device *d,
459 struct device_attribute *attr,
460 const char *buf, size_t count)
462 int new_value, ret = count;
463 struct bonding *bond = to_bond(d);
465 if (bond->dev->flags & IFF_UP) {
466 printk(KERN_ERR DRV_NAME
467 "%s: Interface is up. Unable to update xmit policy.\n",
473 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
475 printk(KERN_ERR DRV_NAME
476 ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
478 (int)strlen(buf) - 1, buf);
482 bond->params.xmit_policy = new_value;
483 bond_set_mode_ops(bond, bond->params.mode);
484 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
485 bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
490 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
493 * Show and set arp_validate.
495 static ssize_t bonding_show_arp_validate(struct device *d,
496 struct device_attribute *attr,
499 struct bonding *bond = to_bond(d);
501 return sprintf(buf, "%s %d\n",
502 arp_validate_tbl[bond->params.arp_validate].modename,
503 bond->params.arp_validate);
506 static ssize_t bonding_store_arp_validate(struct device *d,
507 struct device_attribute *attr,
508 const char *buf, size_t count)
511 struct bonding *bond = to_bond(d);
513 new_value = bond_parse_parm(buf, arp_validate_tbl);
515 printk(KERN_ERR DRV_NAME
516 ": %s: Ignoring invalid arp_validate value %s\n",
517 bond->dev->name, buf);
520 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
521 printk(KERN_ERR DRV_NAME
522 ": %s: arp_validate only supported in active-backup mode.\n",
526 printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
527 bond->dev->name, arp_validate_tbl[new_value].modename,
530 if (!bond->params.arp_validate && new_value) {
531 bond_register_arp(bond);
532 } else if (bond->params.arp_validate && !new_value) {
533 bond_unregister_arp(bond);
536 bond->params.arp_validate = new_value;
541 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
544 * Show and store fail_over_mac. User only allowed to change the
545 * value when there are no slaves.
547 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
549 struct bonding *bond = to_bond(d);
551 return sprintf(buf, "%s %d\n",
552 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
553 bond->params.fail_over_mac);
556 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
559 struct bonding *bond = to_bond(d);
561 if (bond->slave_cnt != 0) {
562 printk(KERN_ERR DRV_NAME
563 ": %s: Can't alter fail_over_mac with slaves in bond.\n",
568 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
570 printk(KERN_ERR DRV_NAME
571 ": %s: Ignoring invalid fail_over_mac value %s.\n",
572 bond->dev->name, buf);
576 bond->params.fail_over_mac = new_value;
577 printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %s (%d).\n",
578 bond->dev->name, fail_over_mac_tbl[new_value].modename,
584 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
587 * Show and set the arp timer interval. There are two tricky bits
588 * here. First, if ARP monitoring is activated, then we must disable
589 * MII monitoring. Second, if the ARP timer isn't running, we must
592 static ssize_t bonding_show_arp_interval(struct device *d,
593 struct device_attribute *attr,
596 struct bonding *bond = to_bond(d);
598 return sprintf(buf, "%d\n", bond->params.arp_interval);
601 static ssize_t bonding_store_arp_interval(struct device *d,
602 struct device_attribute *attr,
603 const char *buf, size_t count)
605 int new_value, ret = count;
606 struct bonding *bond = to_bond(d);
608 if (sscanf(buf, "%d", &new_value) != 1) {
609 printk(KERN_ERR DRV_NAME
610 ": %s: no arp_interval value specified.\n",
616 printk(KERN_ERR DRV_NAME
617 ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
618 bond->dev->name, new_value, INT_MAX);
623 printk(KERN_INFO DRV_NAME
624 ": %s: Setting ARP monitoring interval to %d.\n",
625 bond->dev->name, new_value);
626 bond->params.arp_interval = new_value;
627 if (bond->params.miimon) {
628 printk(KERN_INFO DRV_NAME
629 ": %s: ARP monitoring cannot be used with MII monitoring. "
630 "%s Disabling MII monitoring.\n",
631 bond->dev->name, bond->dev->name);
632 bond->params.miimon = 0;
633 if (delayed_work_pending(&bond->mii_work)) {
634 cancel_delayed_work(&bond->mii_work);
635 flush_workqueue(bond->wq);
638 if (!bond->params.arp_targets[0]) {
639 printk(KERN_INFO DRV_NAME
640 ": %s: ARP monitoring has been set up, "
641 "but no ARP targets have been specified.\n",
644 if (bond->dev->flags & IFF_UP) {
645 /* If the interface is up, we may need to fire off
646 * the ARP timer. If the interface is down, the
647 * timer will get fired off when the open function
650 if (!delayed_work_pending(&bond->arp_work)) {
651 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
652 INIT_DELAYED_WORK(&bond->arp_work,
653 bond_activebackup_arp_mon);
655 INIT_DELAYED_WORK(&bond->arp_work,
656 bond_loadbalance_arp_mon);
658 queue_delayed_work(bond->wq, &bond->arp_work, 0);
665 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
668 * Show and set the arp targets.
670 static ssize_t bonding_show_arp_targets(struct device *d,
671 struct device_attribute *attr,
675 struct bonding *bond = to_bond(d);
677 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
678 if (bond->params.arp_targets[i])
679 res += sprintf(buf + res, "%u.%u.%u.%u ",
680 NIPQUAD(bond->params.arp_targets[i]));
683 buf[res-1] = '\n'; /* eat the leftover space */
687 static ssize_t bonding_store_arp_targets(struct device *d,
688 struct device_attribute *attr,
689 const char *buf, size_t count)
692 int i = 0, done = 0, ret = count;
693 struct bonding *bond = to_bond(d);
696 targets = bond->params.arp_targets;
697 newtarget = in_aton(buf + 1);
700 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
701 printk(KERN_ERR DRV_NAME
702 ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
703 bond->dev->name, NIPQUAD(newtarget));
707 /* look for an empty slot to put the target in, and check for dupes */
708 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
709 if (targets[i] == newtarget) { /* duplicate */
710 printk(KERN_ERR DRV_NAME
711 ": %s: ARP target %u.%u.%u.%u is already present\n",
712 bond->dev->name, NIPQUAD(newtarget));
718 if (targets[i] == 0 && !done) {
719 printk(KERN_INFO DRV_NAME
720 ": %s: adding ARP target %d.%d.%d.%d.\n",
721 bond->dev->name, NIPQUAD(newtarget));
723 targets[i] = newtarget;
727 printk(KERN_ERR DRV_NAME
728 ": %s: ARP target table is full!\n",
735 else if (buf[0] == '-') {
736 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
737 printk(KERN_ERR DRV_NAME
738 ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
739 bond->dev->name, NIPQUAD(newtarget));
744 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
745 if (targets[i] == newtarget) {
746 printk(KERN_INFO DRV_NAME
747 ": %s: removing ARP target %d.%d.%d.%d.\n",
748 bond->dev->name, NIPQUAD(newtarget));
754 printk(KERN_INFO DRV_NAME
755 ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
756 bond->dev->name, NIPQUAD(newtarget));
762 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
771 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
774 * Show and set the up and down delays. These must be multiples of the
775 * MII monitoring value, and are stored internally as the multiplier.
776 * Thus, we must translate to MS for the real world.
778 static ssize_t bonding_show_downdelay(struct device *d,
779 struct device_attribute *attr,
782 struct bonding *bond = to_bond(d);
784 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
787 static ssize_t bonding_store_downdelay(struct device *d,
788 struct device_attribute *attr,
789 const char *buf, size_t count)
791 int new_value, ret = count;
792 struct bonding *bond = to_bond(d);
794 if (!(bond->params.miimon)) {
795 printk(KERN_ERR DRV_NAME
796 ": %s: Unable to set down delay as MII monitoring is disabled\n",
802 if (sscanf(buf, "%d", &new_value) != 1) {
803 printk(KERN_ERR DRV_NAME
804 ": %s: no down delay value specified.\n",
810 printk(KERN_ERR DRV_NAME
811 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
812 bond->dev->name, new_value, 1, INT_MAX);
816 if ((new_value % bond->params.miimon) != 0) {
817 printk(KERN_WARNING DRV_NAME
818 ": %s: Warning: down delay (%d) is not a multiple "
819 "of miimon (%d), delay rounded to %d ms\n",
820 bond->dev->name, new_value, bond->params.miimon,
821 (new_value / bond->params.miimon) *
822 bond->params.miimon);
824 bond->params.downdelay = new_value / bond->params.miimon;
825 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
826 bond->dev->name, bond->params.downdelay * bond->params.miimon);
833 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
835 static ssize_t bonding_show_updelay(struct device *d,
836 struct device_attribute *attr,
839 struct bonding *bond = to_bond(d);
841 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
845 static ssize_t bonding_store_updelay(struct device *d,
846 struct device_attribute *attr,
847 const char *buf, size_t count)
849 int new_value, ret = count;
850 struct bonding *bond = to_bond(d);
852 if (!(bond->params.miimon)) {
853 printk(KERN_ERR DRV_NAME
854 ": %s: Unable to set up delay as MII monitoring is disabled\n",
860 if (sscanf(buf, "%d", &new_value) != 1) {
861 printk(KERN_ERR DRV_NAME
862 ": %s: no up delay value specified.\n",
868 printk(KERN_ERR DRV_NAME
869 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
870 bond->dev->name, new_value, 1, INT_MAX);
874 if ((new_value % bond->params.miimon) != 0) {
875 printk(KERN_WARNING DRV_NAME
876 ": %s: Warning: up delay (%d) is not a multiple "
877 "of miimon (%d), updelay rounded to %d ms\n",
878 bond->dev->name, new_value, bond->params.miimon,
879 (new_value / bond->params.miimon) *
880 bond->params.miimon);
882 bond->params.updelay = new_value / bond->params.miimon;
883 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
884 bond->dev->name, bond->params.updelay * bond->params.miimon);
891 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
894 * Show and set the LACP interval. Interface must be down, and the mode
895 * must be set to 802.3ad mode.
897 static ssize_t bonding_show_lacp(struct device *d,
898 struct device_attribute *attr,
901 struct bonding *bond = to_bond(d);
903 return sprintf(buf, "%s %d\n",
904 bond_lacp_tbl[bond->params.lacp_fast].modename,
905 bond->params.lacp_fast);
908 static ssize_t bonding_store_lacp(struct device *d,
909 struct device_attribute *attr,
910 const char *buf, size_t count)
912 int new_value, ret = count;
913 struct bonding *bond = to_bond(d);
915 if (bond->dev->flags & IFF_UP) {
916 printk(KERN_ERR DRV_NAME
917 ": %s: Unable to update LACP rate because interface is up.\n",
923 if (bond->params.mode != BOND_MODE_8023AD) {
924 printk(KERN_ERR DRV_NAME
925 ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
931 new_value = bond_parse_parm(buf, bond_lacp_tbl);
933 if ((new_value == 1) || (new_value == 0)) {
934 bond->params.lacp_fast = new_value;
935 printk(KERN_INFO DRV_NAME
936 ": %s: Setting LACP rate to %s (%d).\n",
937 bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
939 printk(KERN_ERR DRV_NAME
940 ": %s: Ignoring invalid LACP rate value %.*s.\n",
941 bond->dev->name, (int)strlen(buf) - 1, buf);
947 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
950 * Show and set the number of grat ARP to send after a failover event.
952 static ssize_t bonding_show_n_grat_arp(struct device *d,
953 struct device_attribute *attr,
956 struct bonding *bond = to_bond(d);
958 return sprintf(buf, "%d\n", bond->params.num_grat_arp);
961 static ssize_t bonding_store_n_grat_arp(struct device *d,
962 struct device_attribute *attr,
963 const char *buf, size_t count)
965 int new_value, ret = count;
966 struct bonding *bond = to_bond(d);
968 if (sscanf(buf, "%d", &new_value) != 1) {
969 printk(KERN_ERR DRV_NAME
970 ": %s: no num_grat_arp value specified.\n",
975 if (new_value < 0 || new_value > 255) {
976 printk(KERN_ERR DRV_NAME
977 ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
978 bond->dev->name, new_value);
982 bond->params.num_grat_arp = new_value;
987 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR, bonding_show_n_grat_arp, bonding_store_n_grat_arp);
989 * Show and set the MII monitor interval. There are two tricky bits
990 * here. First, if MII monitoring is activated, then we must disable
991 * ARP monitoring. Second, if the timer isn't running, we must
994 static ssize_t bonding_show_miimon(struct device *d,
995 struct device_attribute *attr,
998 struct bonding *bond = to_bond(d);
1000 return sprintf(buf, "%d\n", bond->params.miimon);
1003 static ssize_t bonding_store_miimon(struct device *d,
1004 struct device_attribute *attr,
1005 const char *buf, size_t count)
1007 int new_value, ret = count;
1008 struct bonding *bond = to_bond(d);
1010 if (sscanf(buf, "%d", &new_value) != 1) {
1011 printk(KERN_ERR DRV_NAME
1012 ": %s: no miimon value specified.\n",
1017 if (new_value < 0) {
1018 printk(KERN_ERR DRV_NAME
1019 ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1020 bond->dev->name, new_value, 1, INT_MAX);
1024 printk(KERN_INFO DRV_NAME
1025 ": %s: Setting MII monitoring interval to %d.\n",
1026 bond->dev->name, new_value);
1027 bond->params.miimon = new_value;
1028 if(bond->params.updelay)
1029 printk(KERN_INFO DRV_NAME
1030 ": %s: Note: Updating updelay (to %d) "
1031 "since it is a multiple of the miimon value.\n",
1033 bond->params.updelay * bond->params.miimon);
1034 if(bond->params.downdelay)
1035 printk(KERN_INFO DRV_NAME
1036 ": %s: Note: Updating downdelay (to %d) "
1037 "since it is a multiple of the miimon value.\n",
1039 bond->params.downdelay * bond->params.miimon);
1040 if (bond->params.arp_interval) {
1041 printk(KERN_INFO DRV_NAME
1042 ": %s: MII monitoring cannot be used with "
1043 "ARP monitoring. Disabling ARP monitoring...\n",
1045 bond->params.arp_interval = 0;
1046 if (bond->params.arp_validate) {
1047 bond_unregister_arp(bond);
1048 bond->params.arp_validate =
1049 BOND_ARP_VALIDATE_NONE;
1051 if (delayed_work_pending(&bond->arp_work)) {
1052 cancel_delayed_work(&bond->arp_work);
1053 flush_workqueue(bond->wq);
1057 if (bond->dev->flags & IFF_UP) {
1058 /* If the interface is up, we may need to fire off
1059 * the MII timer. If the interface is down, the
1060 * timer will get fired off when the open function
1063 if (!delayed_work_pending(&bond->mii_work)) {
1064 INIT_DELAYED_WORK(&bond->mii_work,
1066 queue_delayed_work(bond->wq,
1067 &bond->mii_work, 0);
1074 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1077 * Show and set the primary slave. The store function is much
1078 * simpler than bonding_store_slaves function because it only needs to
1079 * handle one interface name.
1080 * The bond must be a mode that supports a primary for this be
1083 static ssize_t bonding_show_primary(struct device *d,
1084 struct device_attribute *attr,
1088 struct bonding *bond = to_bond(d);
1090 if (bond->primary_slave)
1091 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1096 static ssize_t bonding_store_primary(struct device *d,
1097 struct device_attribute *attr,
1098 const char *buf, size_t count)
1101 struct slave *slave;
1102 struct bonding *bond = to_bond(d);
1105 read_lock(&bond->lock);
1106 write_lock_bh(&bond->curr_slave_lock);
1108 if (!USES_PRIMARY(bond->params.mode)) {
1109 printk(KERN_INFO DRV_NAME
1110 ": %s: Unable to set primary slave; %s is in mode %d\n",
1111 bond->dev->name, bond->dev->name, bond->params.mode);
1113 bond_for_each_slave(bond, slave, i) {
1115 (slave->dev->name, buf,
1116 strlen(slave->dev->name)) == 0) {
1117 printk(KERN_INFO DRV_NAME
1118 ": %s: Setting %s as primary slave.\n",
1119 bond->dev->name, slave->dev->name);
1120 bond->primary_slave = slave;
1121 bond_select_active_slave(bond);
1126 /* if we got here, then we didn't match the name of any slave */
1128 if (strlen(buf) == 0 || buf[0] == '\n') {
1129 printk(KERN_INFO DRV_NAME
1130 ": %s: Setting primary slave to None.\n",
1132 bond->primary_slave = NULL;
1133 bond_select_active_slave(bond);
1135 printk(KERN_INFO DRV_NAME
1136 ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1137 bond->dev->name, (int)strlen(buf) - 1, buf);
1141 write_unlock_bh(&bond->curr_slave_lock);
1142 read_unlock(&bond->lock);
1147 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1150 * Show and set the use_carrier flag.
1152 static ssize_t bonding_show_carrier(struct device *d,
1153 struct device_attribute *attr,
1156 struct bonding *bond = to_bond(d);
1158 return sprintf(buf, "%d\n", bond->params.use_carrier);
1161 static ssize_t bonding_store_carrier(struct device *d,
1162 struct device_attribute *attr,
1163 const char *buf, size_t count)
1165 int new_value, ret = count;
1166 struct bonding *bond = to_bond(d);
1169 if (sscanf(buf, "%d", &new_value) != 1) {
1170 printk(KERN_ERR DRV_NAME
1171 ": %s: no use_carrier value specified.\n",
1176 if ((new_value == 0) || (new_value == 1)) {
1177 bond->params.use_carrier = new_value;
1178 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1179 bond->dev->name, new_value);
1181 printk(KERN_INFO DRV_NAME
1182 ": %s: Ignoring invalid use_carrier value %d.\n",
1183 bond->dev->name, new_value);
1188 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1192 * Show and set currently active_slave.
1194 static ssize_t bonding_show_active_slave(struct device *d,
1195 struct device_attribute *attr,
1199 struct bonding *bond = to_bond(d);
1202 read_lock(&bond->curr_slave_lock);
1203 curr = bond->curr_active_slave;
1204 read_unlock(&bond->curr_slave_lock);
1206 if (USES_PRIMARY(bond->params.mode) && curr)
1207 count = sprintf(buf, "%s\n", curr->dev->name);
1211 static ssize_t bonding_store_active_slave(struct device *d,
1212 struct device_attribute *attr,
1213 const char *buf, size_t count)
1216 struct slave *slave;
1217 struct slave *old_active = NULL;
1218 struct slave *new_active = NULL;
1219 struct bonding *bond = to_bond(d);
1222 read_lock(&bond->lock);
1223 write_lock_bh(&bond->curr_slave_lock);
1225 if (!USES_PRIMARY(bond->params.mode)) {
1226 printk(KERN_INFO DRV_NAME
1227 ": %s: Unable to change active slave; %s is in mode %d\n",
1228 bond->dev->name, bond->dev->name, bond->params.mode);
1230 bond_for_each_slave(bond, slave, i) {
1232 (slave->dev->name, buf,
1233 strlen(slave->dev->name)) == 0) {
1234 old_active = bond->curr_active_slave;
1236 if (new_active == old_active) {
1238 printk(KERN_INFO DRV_NAME
1239 ": %s: %s is already the current active slave.\n",
1240 bond->dev->name, slave->dev->name);
1246 (new_active->link == BOND_LINK_UP) &&
1247 IS_UP(new_active->dev)) {
1248 printk(KERN_INFO DRV_NAME
1249 ": %s: Setting %s as active slave.\n",
1250 bond->dev->name, slave->dev->name);
1251 bond_change_active_slave(bond, new_active);
1254 printk(KERN_INFO DRV_NAME
1255 ": %s: Could not set %s as active slave; "
1256 "either %s is down or the link is down.\n",
1257 bond->dev->name, slave->dev->name,
1265 /* if we got here, then we didn't match the name of any slave */
1267 if (strlen(buf) == 0 || buf[0] == '\n') {
1268 printk(KERN_INFO DRV_NAME
1269 ": %s: Setting active slave to None.\n",
1271 bond->primary_slave = NULL;
1272 bond_select_active_slave(bond);
1274 printk(KERN_INFO DRV_NAME
1275 ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1276 bond->dev->name, (int)strlen(buf) - 1, buf);
1280 write_unlock_bh(&bond->curr_slave_lock);
1281 read_unlock(&bond->lock);
1287 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1291 * Show link status of the bond interface.
1293 static ssize_t bonding_show_mii_status(struct device *d,
1294 struct device_attribute *attr,
1298 struct bonding *bond = to_bond(d);
1300 read_lock(&bond->curr_slave_lock);
1301 curr = bond->curr_active_slave;
1302 read_unlock(&bond->curr_slave_lock);
1304 return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1306 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1310 * Show current 802.3ad aggregator ID.
1312 static ssize_t bonding_show_ad_aggregator(struct device *d,
1313 struct device_attribute *attr,
1317 struct bonding *bond = to_bond(d);
1319 if (bond->params.mode == BOND_MODE_8023AD) {
1320 struct ad_info ad_info;
1321 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.aggregator_id);
1326 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1330 * Show number of active 802.3ad ports.
1332 static ssize_t bonding_show_ad_num_ports(struct device *d,
1333 struct device_attribute *attr,
1337 struct bonding *bond = to_bond(d);
1339 if (bond->params.mode == BOND_MODE_8023AD) {
1340 struct ad_info ad_info;
1341 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0: ad_info.ports);
1346 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1350 * Show current 802.3ad actor key.
1352 static ssize_t bonding_show_ad_actor_key(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.actor_key);
1366 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1370 * Show current 802.3ad partner key.
1372 static ssize_t bonding_show_ad_partner_key(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.partner_key);
1386 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1390 * Show current 802.3ad partner mac.
1392 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1393 struct device_attribute *attr,
1397 struct bonding *bond = to_bond(d);
1398 DECLARE_MAC_BUF(mac);
1400 if (bond->params.mode == BOND_MODE_8023AD) {
1401 struct ad_info ad_info;
1402 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1403 count = sprintf(buf,"%s\n",
1404 print_mac(mac, ad_info.partner_system));
1410 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1414 static struct attribute *per_bond_attrs[] = {
1415 &dev_attr_slaves.attr,
1416 &dev_attr_mode.attr,
1417 &dev_attr_fail_over_mac.attr,
1418 &dev_attr_arp_validate.attr,
1419 &dev_attr_arp_interval.attr,
1420 &dev_attr_arp_ip_target.attr,
1421 &dev_attr_downdelay.attr,
1422 &dev_attr_updelay.attr,
1423 &dev_attr_lacp_rate.attr,
1424 &dev_attr_xmit_hash_policy.attr,
1425 &dev_attr_num_grat_arp.attr,
1426 &dev_attr_miimon.attr,
1427 &dev_attr_primary.attr,
1428 &dev_attr_use_carrier.attr,
1429 &dev_attr_active_slave.attr,
1430 &dev_attr_mii_status.attr,
1431 &dev_attr_ad_aggregator.attr,
1432 &dev_attr_ad_num_ports.attr,
1433 &dev_attr_ad_actor_key.attr,
1434 &dev_attr_ad_partner_key.attr,
1435 &dev_attr_ad_partner_mac.attr,
1439 static struct attribute_group bonding_group = {
1441 .attrs = per_bond_attrs,
1445 * Initialize sysfs. This sets up the bonding_masters file in
1448 int bond_create_sysfs(void)
1451 struct bonding *firstbond;
1453 /* get the netdev class pointer */
1454 firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1458 netdev_class = firstbond->dev->dev.class;
1462 ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1464 * Permit multiple loads of the module by ignoring failures to
1465 * create the bonding_masters sysfs file. Bonding devices
1466 * created by second or subsequent loads of the module will
1467 * not be listed in, or controllable by, bonding_masters, but
1468 * will have the usual "bonding" sysfs directory.
1470 * This is done to preserve backwards compatibility for
1471 * initscripts/sysconfig, which load bonding multiple times to
1472 * configure multiple bonding devices.
1474 if (ret == -EEXIST) {
1475 /* Is someone being kinky and naming a device bonding_master? */
1476 if (__dev_get_by_name(&init_net,
1477 class_attr_bonding_masters.attr.name))
1479 "network device named %s already exists in sysfs",
1480 class_attr_bonding_masters.attr.name);
1482 netdev_class = NULL;
1492 * Remove /sys/class/net/bonding_masters.
1494 void bond_destroy_sysfs(void)
1497 class_remove_file(netdev_class, &class_attr_bonding_masters);
1501 * Initialize sysfs for each bond. This sets up and registers
1502 * the 'bondctl' directory for each individual bond under /sys/class/net.
1504 int bond_create_sysfs_entry(struct bonding *bond)
1506 struct net_device *dev = bond->dev;
1509 err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1511 printk(KERN_EMERG "eek! didn't create group!\n");
1514 if (expected_refcount < 1)
1515 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1520 * Remove sysfs entries for each bond.
1522 void bond_destroy_sysfs_entry(struct bonding *bond)
1524 struct net_device *dev = bond->dev;
1526 sysfs_remove_group(&(dev->dev.kobj), &bonding_group);