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 *)(netdev_priv(to_net_dev(cd))))
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 ad_select_tbl[];
52 extern struct bond_parm_tbl xmit_hashtype_tbl[];
53 extern struct bond_parm_tbl arp_validate_tbl[];
54 extern struct bond_parm_tbl fail_over_mac_tbl[];
56 static int expected_refcount = -1;
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 res = dev_set_mtu(dev, bond->dev->mtu);
326 res = bond_enslave(bond->dev, dev);
327 bond_for_each_slave(bond, slave, i)
328 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
329 slave->original_mtu = original_mtu;
336 if (command[0] == '-') {
339 bond_for_each_slave(bond, slave, i)
340 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
342 original_mtu = slave->original_mtu;
346 printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
347 bond->dev->name, dev->name);
348 res = bond_release(bond->dev, dev);
353 /* set the slave MTU to the default */
354 dev_set_mtu(dev, original_mtu);
357 printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
358 ifname, bond->dev->name);
365 printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
369 up_write(&(bonding_rwsem));
374 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
377 * Show and set the bonding mode. The bond interface must be down to
380 static ssize_t bonding_show_mode(struct device *d,
381 struct device_attribute *attr, char *buf)
383 struct bonding *bond = to_bond(d);
385 return sprintf(buf, "%s %d\n",
386 bond_mode_tbl[bond->params.mode].modename,
390 static ssize_t bonding_store_mode(struct device *d,
391 struct device_attribute *attr,
392 const char *buf, size_t count)
394 int new_value, ret = count;
395 struct bonding *bond = to_bond(d);
397 if (bond->dev->flags & IFF_UP) {
398 printk(KERN_ERR DRV_NAME
399 ": unable to update mode of %s because interface is up.\n",
405 new_value = bond_parse_parm(buf, bond_mode_tbl);
407 printk(KERN_ERR DRV_NAME
408 ": %s: Ignoring invalid mode value %.*s.\n",
410 (int)strlen(buf) - 1, buf);
414 if (bond->params.mode == BOND_MODE_8023AD)
415 bond_unset_master_3ad_flags(bond);
417 if (bond->params.mode == BOND_MODE_ALB)
418 bond_unset_master_alb_flags(bond);
420 bond->params.mode = new_value;
421 bond_set_mode_ops(bond, bond->params.mode);
422 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
423 bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
428 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
431 * Show and set the bonding transmit hash method. The bond interface must be down to
432 * change the xmit hash policy.
434 static ssize_t bonding_show_xmit_hash(struct device *d,
435 struct device_attribute *attr,
438 struct bonding *bond = to_bond(d);
440 return sprintf(buf, "%s %d\n",
441 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
442 bond->params.xmit_policy);
445 static ssize_t bonding_store_xmit_hash(struct device *d,
446 struct device_attribute *attr,
447 const char *buf, size_t count)
449 int new_value, ret = count;
450 struct bonding *bond = to_bond(d);
452 if (bond->dev->flags & IFF_UP) {
453 printk(KERN_ERR DRV_NAME
454 "%s: Interface is up. Unable to update xmit policy.\n",
460 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
462 printk(KERN_ERR DRV_NAME
463 ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
465 (int)strlen(buf) - 1, buf);
469 bond->params.xmit_policy = new_value;
470 bond_set_mode_ops(bond, bond->params.mode);
471 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
472 bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
477 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
480 * Show and set arp_validate.
482 static ssize_t bonding_show_arp_validate(struct device *d,
483 struct device_attribute *attr,
486 struct bonding *bond = to_bond(d);
488 return sprintf(buf, "%s %d\n",
489 arp_validate_tbl[bond->params.arp_validate].modename,
490 bond->params.arp_validate);
493 static ssize_t bonding_store_arp_validate(struct device *d,
494 struct device_attribute *attr,
495 const char *buf, size_t count)
498 struct bonding *bond = to_bond(d);
500 new_value = bond_parse_parm(buf, arp_validate_tbl);
502 printk(KERN_ERR DRV_NAME
503 ": %s: Ignoring invalid arp_validate value %s\n",
504 bond->dev->name, buf);
507 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
508 printk(KERN_ERR DRV_NAME
509 ": %s: arp_validate only supported in active-backup mode.\n",
513 printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
514 bond->dev->name, arp_validate_tbl[new_value].modename,
517 if (!bond->params.arp_validate && new_value) {
518 bond_register_arp(bond);
519 } else if (bond->params.arp_validate && !new_value) {
520 bond_unregister_arp(bond);
523 bond->params.arp_validate = new_value;
528 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
531 * Show and store fail_over_mac. User only allowed to change the
532 * value when there are no slaves.
534 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
536 struct bonding *bond = to_bond(d);
538 return sprintf(buf, "%s %d\n",
539 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
540 bond->params.fail_over_mac);
543 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
546 struct bonding *bond = to_bond(d);
548 if (bond->slave_cnt != 0) {
549 printk(KERN_ERR DRV_NAME
550 ": %s: Can't alter fail_over_mac with slaves in bond.\n",
555 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
557 printk(KERN_ERR DRV_NAME
558 ": %s: Ignoring invalid fail_over_mac value %s.\n",
559 bond->dev->name, buf);
563 bond->params.fail_over_mac = new_value;
564 printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %s (%d).\n",
565 bond->dev->name, fail_over_mac_tbl[new_value].modename,
571 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
574 * Show and set the arp timer interval. There are two tricky bits
575 * here. First, if ARP monitoring is activated, then we must disable
576 * MII monitoring. Second, if the ARP timer isn't running, we must
579 static ssize_t bonding_show_arp_interval(struct device *d,
580 struct device_attribute *attr,
583 struct bonding *bond = to_bond(d);
585 return sprintf(buf, "%d\n", bond->params.arp_interval);
588 static ssize_t bonding_store_arp_interval(struct device *d,
589 struct device_attribute *attr,
590 const char *buf, size_t count)
592 int new_value, ret = count;
593 struct bonding *bond = to_bond(d);
595 if (sscanf(buf, "%d", &new_value) != 1) {
596 printk(KERN_ERR DRV_NAME
597 ": %s: no arp_interval value specified.\n",
603 printk(KERN_ERR DRV_NAME
604 ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
605 bond->dev->name, new_value, INT_MAX);
610 printk(KERN_INFO DRV_NAME
611 ": %s: Setting ARP monitoring interval to %d.\n",
612 bond->dev->name, new_value);
613 bond->params.arp_interval = new_value;
614 if (bond->params.arp_interval)
615 bond->dev->priv_flags |= IFF_MASTER_ARPMON;
616 if (bond->params.miimon) {
617 printk(KERN_INFO DRV_NAME
618 ": %s: ARP monitoring cannot be used with MII monitoring. "
619 "%s Disabling MII monitoring.\n",
620 bond->dev->name, bond->dev->name);
621 bond->params.miimon = 0;
622 if (delayed_work_pending(&bond->mii_work)) {
623 cancel_delayed_work(&bond->mii_work);
624 flush_workqueue(bond->wq);
627 if (!bond->params.arp_targets[0]) {
628 printk(KERN_INFO DRV_NAME
629 ": %s: ARP monitoring has been set up, "
630 "but no ARP targets have been specified.\n",
633 if (bond->dev->flags & IFF_UP) {
634 /* If the interface is up, we may need to fire off
635 * the ARP timer. If the interface is down, the
636 * timer will get fired off when the open function
639 if (!delayed_work_pending(&bond->arp_work)) {
640 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
641 INIT_DELAYED_WORK(&bond->arp_work,
642 bond_activebackup_arp_mon);
644 INIT_DELAYED_WORK(&bond->arp_work,
645 bond_loadbalance_arp_mon);
647 queue_delayed_work(bond->wq, &bond->arp_work, 0);
654 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
657 * Show and set the arp targets.
659 static ssize_t bonding_show_arp_targets(struct device *d,
660 struct device_attribute *attr,
664 struct bonding *bond = to_bond(d);
666 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
667 if (bond->params.arp_targets[i])
668 res += sprintf(buf + res, "%pI4 ",
669 &bond->params.arp_targets[i]);
672 buf[res-1] = '\n'; /* eat the leftover space */
676 static ssize_t bonding_store_arp_targets(struct device *d,
677 struct device_attribute *attr,
678 const char *buf, size_t count)
681 int i = 0, done = 0, ret = count;
682 struct bonding *bond = to_bond(d);
685 targets = bond->params.arp_targets;
686 newtarget = in_aton(buf + 1);
689 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
690 printk(KERN_ERR DRV_NAME
691 ": %s: invalid ARP target %pI4 specified for addition\n",
692 bond->dev->name, &newtarget);
696 /* look for an empty slot to put the target in, and check for dupes */
697 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
698 if (targets[i] == newtarget) { /* duplicate */
699 printk(KERN_ERR DRV_NAME
700 ": %s: ARP target %pI4 is already present\n",
701 bond->dev->name, &newtarget);
707 if (targets[i] == 0 && !done) {
708 printk(KERN_INFO DRV_NAME
709 ": %s: adding ARP target %pI4.\n",
710 bond->dev->name, &newtarget);
712 targets[i] = newtarget;
716 printk(KERN_ERR DRV_NAME
717 ": %s: ARP target table is full!\n",
724 else if (buf[0] == '-') {
725 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
726 printk(KERN_ERR DRV_NAME
727 ": %s: invalid ARP target %pI4 specified for removal\n",
728 bond->dev->name, &newtarget);
733 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
734 if (targets[i] == newtarget) {
735 printk(KERN_INFO DRV_NAME
736 ": %s: removing ARP target %pI4.\n",
737 bond->dev->name, &newtarget);
743 printk(KERN_INFO DRV_NAME
744 ": %s: unable to remove nonexistent ARP target %pI4.\n",
745 bond->dev->name, &newtarget);
751 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
760 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
763 * Show and set the up and down delays. These must be multiples of the
764 * MII monitoring value, and are stored internally as the multiplier.
765 * Thus, we must translate to MS for the real world.
767 static ssize_t bonding_show_downdelay(struct device *d,
768 struct device_attribute *attr,
771 struct bonding *bond = to_bond(d);
773 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
776 static ssize_t bonding_store_downdelay(struct device *d,
777 struct device_attribute *attr,
778 const char *buf, size_t count)
780 int new_value, ret = count;
781 struct bonding *bond = to_bond(d);
783 if (!(bond->params.miimon)) {
784 printk(KERN_ERR DRV_NAME
785 ": %s: Unable to set down delay as MII monitoring is disabled\n",
791 if (sscanf(buf, "%d", &new_value) != 1) {
792 printk(KERN_ERR DRV_NAME
793 ": %s: no down delay value specified.\n",
799 printk(KERN_ERR DRV_NAME
800 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
801 bond->dev->name, new_value, 1, INT_MAX);
805 if ((new_value % bond->params.miimon) != 0) {
806 printk(KERN_WARNING DRV_NAME
807 ": %s: Warning: down delay (%d) is not a multiple "
808 "of miimon (%d), delay rounded to %d ms\n",
809 bond->dev->name, new_value, bond->params.miimon,
810 (new_value / bond->params.miimon) *
811 bond->params.miimon);
813 bond->params.downdelay = new_value / bond->params.miimon;
814 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
815 bond->dev->name, bond->params.downdelay * bond->params.miimon);
822 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
824 static ssize_t bonding_show_updelay(struct device *d,
825 struct device_attribute *attr,
828 struct bonding *bond = to_bond(d);
830 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
834 static ssize_t bonding_store_updelay(struct device *d,
835 struct device_attribute *attr,
836 const char *buf, size_t count)
838 int new_value, ret = count;
839 struct bonding *bond = to_bond(d);
841 if (!(bond->params.miimon)) {
842 printk(KERN_ERR DRV_NAME
843 ": %s: Unable to set up delay as MII monitoring is disabled\n",
849 if (sscanf(buf, "%d", &new_value) != 1) {
850 printk(KERN_ERR DRV_NAME
851 ": %s: no up delay value specified.\n",
857 printk(KERN_ERR DRV_NAME
858 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
859 bond->dev->name, new_value, 1, INT_MAX);
863 if ((new_value % bond->params.miimon) != 0) {
864 printk(KERN_WARNING DRV_NAME
865 ": %s: Warning: up delay (%d) is not a multiple "
866 "of miimon (%d), updelay rounded to %d ms\n",
867 bond->dev->name, new_value, bond->params.miimon,
868 (new_value / bond->params.miimon) *
869 bond->params.miimon);
871 bond->params.updelay = new_value / bond->params.miimon;
872 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
873 bond->dev->name, bond->params.updelay * bond->params.miimon);
880 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
883 * Show and set the LACP interval. Interface must be down, and the mode
884 * must be set to 802.3ad mode.
886 static ssize_t bonding_show_lacp(struct device *d,
887 struct device_attribute *attr,
890 struct bonding *bond = to_bond(d);
892 return sprintf(buf, "%s %d\n",
893 bond_lacp_tbl[bond->params.lacp_fast].modename,
894 bond->params.lacp_fast);
897 static ssize_t bonding_store_lacp(struct device *d,
898 struct device_attribute *attr,
899 const char *buf, size_t count)
901 int new_value, ret = count;
902 struct bonding *bond = to_bond(d);
904 if (bond->dev->flags & IFF_UP) {
905 printk(KERN_ERR DRV_NAME
906 ": %s: Unable to update LACP rate because interface is up.\n",
912 if (bond->params.mode != BOND_MODE_8023AD) {
913 printk(KERN_ERR DRV_NAME
914 ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
920 new_value = bond_parse_parm(buf, bond_lacp_tbl);
922 if ((new_value == 1) || (new_value == 0)) {
923 bond->params.lacp_fast = new_value;
924 printk(KERN_INFO DRV_NAME
925 ": %s: Setting LACP rate to %s (%d).\n",
926 bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
928 printk(KERN_ERR DRV_NAME
929 ": %s: Ignoring invalid LACP rate value %.*s.\n",
930 bond->dev->name, (int)strlen(buf) - 1, buf);
936 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
938 static ssize_t bonding_show_ad_select(struct device *d,
939 struct device_attribute *attr,
942 struct bonding *bond = to_bond(d);
944 return sprintf(buf, "%s %d\n",
945 ad_select_tbl[bond->params.ad_select].modename,
946 bond->params.ad_select);
950 static ssize_t bonding_store_ad_select(struct device *d,
951 struct device_attribute *attr,
952 const char *buf, size_t count)
954 int new_value, ret = count;
955 struct bonding *bond = to_bond(d);
957 if (bond->dev->flags & IFF_UP) {
958 printk(KERN_ERR DRV_NAME
959 ": %s: Unable to update ad_select because interface "
960 "is up.\n", bond->dev->name);
965 new_value = bond_parse_parm(buf, ad_select_tbl);
967 if (new_value != -1) {
968 bond->params.ad_select = new_value;
969 printk(KERN_INFO DRV_NAME
970 ": %s: Setting ad_select to %s (%d).\n",
971 bond->dev->name, ad_select_tbl[new_value].modename,
974 printk(KERN_ERR DRV_NAME
975 ": %s: Ignoring invalid ad_select value %.*s.\n",
976 bond->dev->name, (int)strlen(buf) - 1, buf);
983 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR, bonding_show_ad_select, bonding_store_ad_select);
986 * Show and set the number of grat ARP to send after a failover event.
988 static ssize_t bonding_show_n_grat_arp(struct device *d,
989 struct device_attribute *attr,
992 struct bonding *bond = to_bond(d);
994 return sprintf(buf, "%d\n", bond->params.num_grat_arp);
997 static ssize_t bonding_store_n_grat_arp(struct device *d,
998 struct device_attribute *attr,
999 const char *buf, size_t count)
1001 int new_value, ret = count;
1002 struct bonding *bond = to_bond(d);
1004 if (sscanf(buf, "%d", &new_value) != 1) {
1005 printk(KERN_ERR DRV_NAME
1006 ": %s: no num_grat_arp value specified.\n",
1011 if (new_value < 0 || new_value > 255) {
1012 printk(KERN_ERR DRV_NAME
1013 ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
1014 bond->dev->name, new_value);
1018 bond->params.num_grat_arp = new_value;
1023 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR, bonding_show_n_grat_arp, bonding_store_n_grat_arp);
1026 * Show and set the number of unsolicted NA's to send after a failover event.
1028 static ssize_t bonding_show_n_unsol_na(struct device *d,
1029 struct device_attribute *attr,
1032 struct bonding *bond = to_bond(d);
1034 return sprintf(buf, "%d\n", bond->params.num_unsol_na);
1037 static ssize_t bonding_store_n_unsol_na(struct device *d,
1038 struct device_attribute *attr,
1039 const char *buf, size_t count)
1041 int new_value, ret = count;
1042 struct bonding *bond = to_bond(d);
1044 if (sscanf(buf, "%d", &new_value) != 1) {
1045 printk(KERN_ERR DRV_NAME
1046 ": %s: no num_unsol_na value specified.\n",
1051 if (new_value < 0 || new_value > 255) {
1052 printk(KERN_ERR DRV_NAME
1053 ": %s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
1054 bond->dev->name, new_value);
1058 bond->params.num_unsol_na = new_value;
1063 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR, bonding_show_n_unsol_na, bonding_store_n_unsol_na);
1066 * Show and set the MII monitor interval. There are two tricky bits
1067 * here. First, if MII monitoring is activated, then we must disable
1068 * ARP monitoring. Second, if the timer isn't running, we must
1071 static ssize_t bonding_show_miimon(struct device *d,
1072 struct device_attribute *attr,
1075 struct bonding *bond = to_bond(d);
1077 return sprintf(buf, "%d\n", bond->params.miimon);
1080 static ssize_t bonding_store_miimon(struct device *d,
1081 struct device_attribute *attr,
1082 const char *buf, size_t count)
1084 int new_value, ret = count;
1085 struct bonding *bond = to_bond(d);
1087 if (sscanf(buf, "%d", &new_value) != 1) {
1088 printk(KERN_ERR DRV_NAME
1089 ": %s: no miimon value specified.\n",
1094 if (new_value < 0) {
1095 printk(KERN_ERR DRV_NAME
1096 ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1097 bond->dev->name, new_value, 1, INT_MAX);
1101 printk(KERN_INFO DRV_NAME
1102 ": %s: Setting MII monitoring interval to %d.\n",
1103 bond->dev->name, new_value);
1104 bond->params.miimon = new_value;
1105 if(bond->params.updelay)
1106 printk(KERN_INFO DRV_NAME
1107 ": %s: Note: Updating updelay (to %d) "
1108 "since it is a multiple of the miimon value.\n",
1110 bond->params.updelay * bond->params.miimon);
1111 if(bond->params.downdelay)
1112 printk(KERN_INFO DRV_NAME
1113 ": %s: Note: Updating downdelay (to %d) "
1114 "since it is a multiple of the miimon value.\n",
1116 bond->params.downdelay * bond->params.miimon);
1117 if (bond->params.arp_interval) {
1118 printk(KERN_INFO DRV_NAME
1119 ": %s: MII monitoring cannot be used with "
1120 "ARP monitoring. Disabling ARP monitoring...\n",
1122 bond->params.arp_interval = 0;
1123 bond->dev->priv_flags &= ~IFF_MASTER_ARPMON;
1124 if (bond->params.arp_validate) {
1125 bond_unregister_arp(bond);
1126 bond->params.arp_validate =
1127 BOND_ARP_VALIDATE_NONE;
1129 if (delayed_work_pending(&bond->arp_work)) {
1130 cancel_delayed_work(&bond->arp_work);
1131 flush_workqueue(bond->wq);
1135 if (bond->dev->flags & IFF_UP) {
1136 /* If the interface is up, we may need to fire off
1137 * the MII timer. If the interface is down, the
1138 * timer will get fired off when the open function
1141 if (!delayed_work_pending(&bond->mii_work)) {
1142 INIT_DELAYED_WORK(&bond->mii_work,
1144 queue_delayed_work(bond->wq,
1145 &bond->mii_work, 0);
1152 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1155 * Show and set the primary slave. The store function is much
1156 * simpler than bonding_store_slaves function because it only needs to
1157 * handle one interface name.
1158 * The bond must be a mode that supports a primary for this be
1161 static ssize_t bonding_show_primary(struct device *d,
1162 struct device_attribute *attr,
1166 struct bonding *bond = to_bond(d);
1168 if (bond->primary_slave)
1169 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1174 static ssize_t bonding_store_primary(struct device *d,
1175 struct device_attribute *attr,
1176 const char *buf, size_t count)
1179 struct slave *slave;
1180 struct bonding *bond = to_bond(d);
1183 read_lock(&bond->lock);
1184 write_lock_bh(&bond->curr_slave_lock);
1186 if (!USES_PRIMARY(bond->params.mode)) {
1187 printk(KERN_INFO DRV_NAME
1188 ": %s: Unable to set primary slave; %s is in mode %d\n",
1189 bond->dev->name, bond->dev->name, bond->params.mode);
1191 bond_for_each_slave(bond, slave, i) {
1193 (slave->dev->name, buf,
1194 strlen(slave->dev->name)) == 0) {
1195 printk(KERN_INFO DRV_NAME
1196 ": %s: Setting %s as primary slave.\n",
1197 bond->dev->name, slave->dev->name);
1198 bond->primary_slave = slave;
1199 bond_select_active_slave(bond);
1204 /* if we got here, then we didn't match the name of any slave */
1206 if (strlen(buf) == 0 || buf[0] == '\n') {
1207 printk(KERN_INFO DRV_NAME
1208 ": %s: Setting primary slave to None.\n",
1210 bond->primary_slave = NULL;
1211 bond_select_active_slave(bond);
1213 printk(KERN_INFO DRV_NAME
1214 ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1215 bond->dev->name, (int)strlen(buf) - 1, buf);
1219 write_unlock_bh(&bond->curr_slave_lock);
1220 read_unlock(&bond->lock);
1225 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1228 * Show and set the use_carrier flag.
1230 static ssize_t bonding_show_carrier(struct device *d,
1231 struct device_attribute *attr,
1234 struct bonding *bond = to_bond(d);
1236 return sprintf(buf, "%d\n", bond->params.use_carrier);
1239 static ssize_t bonding_store_carrier(struct device *d,
1240 struct device_attribute *attr,
1241 const char *buf, size_t count)
1243 int new_value, ret = count;
1244 struct bonding *bond = to_bond(d);
1247 if (sscanf(buf, "%d", &new_value) != 1) {
1248 printk(KERN_ERR DRV_NAME
1249 ": %s: no use_carrier value specified.\n",
1254 if ((new_value == 0) || (new_value == 1)) {
1255 bond->params.use_carrier = new_value;
1256 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1257 bond->dev->name, new_value);
1259 printk(KERN_INFO DRV_NAME
1260 ": %s: Ignoring invalid use_carrier value %d.\n",
1261 bond->dev->name, new_value);
1266 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1270 * Show and set currently active_slave.
1272 static ssize_t bonding_show_active_slave(struct device *d,
1273 struct device_attribute *attr,
1277 struct bonding *bond = to_bond(d);
1280 read_lock(&bond->curr_slave_lock);
1281 curr = bond->curr_active_slave;
1282 read_unlock(&bond->curr_slave_lock);
1284 if (USES_PRIMARY(bond->params.mode) && curr)
1285 count = sprintf(buf, "%s\n", curr->dev->name);
1289 static ssize_t bonding_store_active_slave(struct device *d,
1290 struct device_attribute *attr,
1291 const char *buf, size_t count)
1294 struct slave *slave;
1295 struct slave *old_active = NULL;
1296 struct slave *new_active = NULL;
1297 struct bonding *bond = to_bond(d);
1300 read_lock(&bond->lock);
1301 write_lock_bh(&bond->curr_slave_lock);
1303 if (!USES_PRIMARY(bond->params.mode)) {
1304 printk(KERN_INFO DRV_NAME
1305 ": %s: Unable to change active slave; %s is in mode %d\n",
1306 bond->dev->name, bond->dev->name, bond->params.mode);
1308 bond_for_each_slave(bond, slave, i) {
1310 (slave->dev->name, buf,
1311 strlen(slave->dev->name)) == 0) {
1312 old_active = bond->curr_active_slave;
1314 if (new_active == old_active) {
1316 printk(KERN_INFO DRV_NAME
1317 ": %s: %s is already the current active slave.\n",
1318 bond->dev->name, slave->dev->name);
1324 (new_active->link == BOND_LINK_UP) &&
1325 IS_UP(new_active->dev)) {
1326 printk(KERN_INFO DRV_NAME
1327 ": %s: Setting %s as active slave.\n",
1328 bond->dev->name, slave->dev->name);
1329 bond_change_active_slave(bond, new_active);
1332 printk(KERN_INFO DRV_NAME
1333 ": %s: Could not set %s as active slave; "
1334 "either %s is down or the link is down.\n",
1335 bond->dev->name, slave->dev->name,
1343 /* if we got here, then we didn't match the name of any slave */
1345 if (strlen(buf) == 0 || buf[0] == '\n') {
1346 printk(KERN_INFO DRV_NAME
1347 ": %s: Setting active slave to None.\n",
1349 bond->primary_slave = NULL;
1350 bond_select_active_slave(bond);
1352 printk(KERN_INFO DRV_NAME
1353 ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1354 bond->dev->name, (int)strlen(buf) - 1, buf);
1358 write_unlock_bh(&bond->curr_slave_lock);
1359 read_unlock(&bond->lock);
1365 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1369 * Show link status of the bond interface.
1371 static ssize_t bonding_show_mii_status(struct device *d,
1372 struct device_attribute *attr,
1376 struct bonding *bond = to_bond(d);
1378 read_lock(&bond->curr_slave_lock);
1379 curr = bond->curr_active_slave;
1380 read_unlock(&bond->curr_slave_lock);
1382 return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1384 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1388 * Show current 802.3ad aggregator ID.
1390 static ssize_t bonding_show_ad_aggregator(struct device *d,
1391 struct device_attribute *attr,
1395 struct bonding *bond = to_bond(d);
1397 if (bond->params.mode == BOND_MODE_8023AD) {
1398 struct ad_info ad_info;
1399 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.aggregator_id);
1404 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1408 * Show number of active 802.3ad ports.
1410 static ssize_t bonding_show_ad_num_ports(struct device *d,
1411 struct device_attribute *attr,
1415 struct bonding *bond = to_bond(d);
1417 if (bond->params.mode == BOND_MODE_8023AD) {
1418 struct ad_info ad_info;
1419 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0: ad_info.ports);
1424 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1428 * Show current 802.3ad actor key.
1430 static ssize_t bonding_show_ad_actor_key(struct device *d,
1431 struct device_attribute *attr,
1435 struct bonding *bond = to_bond(d);
1437 if (bond->params.mode == BOND_MODE_8023AD) {
1438 struct ad_info ad_info;
1439 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.actor_key);
1444 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1448 * Show current 802.3ad partner key.
1450 static ssize_t bonding_show_ad_partner_key(struct device *d,
1451 struct device_attribute *attr,
1455 struct bonding *bond = to_bond(d);
1457 if (bond->params.mode == BOND_MODE_8023AD) {
1458 struct ad_info ad_info;
1459 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.partner_key);
1464 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1468 * Show current 802.3ad partner mac.
1470 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1471 struct device_attribute *attr,
1475 struct bonding *bond = to_bond(d);
1477 if (bond->params.mode == BOND_MODE_8023AD) {
1478 struct ad_info ad_info;
1479 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1480 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1486 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1490 static struct attribute *per_bond_attrs[] = {
1491 &dev_attr_slaves.attr,
1492 &dev_attr_mode.attr,
1493 &dev_attr_fail_over_mac.attr,
1494 &dev_attr_arp_validate.attr,
1495 &dev_attr_arp_interval.attr,
1496 &dev_attr_arp_ip_target.attr,
1497 &dev_attr_downdelay.attr,
1498 &dev_attr_updelay.attr,
1499 &dev_attr_lacp_rate.attr,
1500 &dev_attr_ad_select.attr,
1501 &dev_attr_xmit_hash_policy.attr,
1502 &dev_attr_num_grat_arp.attr,
1503 &dev_attr_num_unsol_na.attr,
1504 &dev_attr_miimon.attr,
1505 &dev_attr_primary.attr,
1506 &dev_attr_use_carrier.attr,
1507 &dev_attr_active_slave.attr,
1508 &dev_attr_mii_status.attr,
1509 &dev_attr_ad_aggregator.attr,
1510 &dev_attr_ad_num_ports.attr,
1511 &dev_attr_ad_actor_key.attr,
1512 &dev_attr_ad_partner_key.attr,
1513 &dev_attr_ad_partner_mac.attr,
1517 static struct attribute_group bonding_group = {
1519 .attrs = per_bond_attrs,
1523 * Initialize sysfs. This sets up the bonding_masters file in
1526 int bond_create_sysfs(void)
1530 ret = netdev_class_create_file(&class_attr_bonding_masters);
1532 * Permit multiple loads of the module by ignoring failures to
1533 * create the bonding_masters sysfs file. Bonding devices
1534 * created by second or subsequent loads of the module will
1535 * not be listed in, or controllable by, bonding_masters, but
1536 * will have the usual "bonding" sysfs directory.
1538 * This is done to preserve backwards compatibility for
1539 * initscripts/sysconfig, which load bonding multiple times to
1540 * configure multiple bonding devices.
1542 if (ret == -EEXIST) {
1543 /* Is someone being kinky and naming a device bonding_master? */
1544 if (__dev_get_by_name(&init_net,
1545 class_attr_bonding_masters.attr.name))
1547 "network device named %s already exists in sysfs",
1548 class_attr_bonding_masters.attr.name);
1556 * Remove /sys/class/net/bonding_masters.
1558 void bond_destroy_sysfs(void)
1560 netdev_class_remove_file(&class_attr_bonding_masters);
1564 * Initialize sysfs for each bond. This sets up and registers
1565 * the 'bondctl' directory for each individual bond under /sys/class/net.
1567 int bond_create_sysfs_entry(struct bonding *bond)
1569 struct net_device *dev = bond->dev;
1572 err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1574 printk(KERN_EMERG "eek! didn't create group!\n");
1577 if (expected_refcount < 1)
1578 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1583 * Remove sysfs entries for each bond.
1585 void bond_destroy_sysfs_entry(struct bonding *bond)
1587 struct net_device *dev = bond->dev;
1589 sysfs_remove_group(&(dev->dev.kobj), &bonding_group);