3 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 * The full GNU General Public License is included in this distribution in the
20 * file called LICENSE.
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/device.h>
26 #include <linux/sysdev.h>
28 #include <linux/types.h>
29 #include <linux/string.h>
30 #include <linux/netdevice.h>
31 #include <linux/inetdevice.h>
33 #include <linux/sysfs.h>
34 #include <linux/ctype.h>
35 #include <linux/inet.h>
36 #include <linux/rtnetlink.h>
37 #include <net/net_namespace.h>
39 /* #define BONDING_DEBUG 1 */
41 #define to_dev(obj) container_of(obj,struct device,kobj)
42 #define to_bond(cd) ((struct bonding *)(to_net_dev(cd)->priv))
44 /*---------------------------- Declarations -------------------------------*/
47 extern struct list_head bond_dev_list;
48 extern struct bond_params bonding_defaults;
49 extern struct bond_parm_tbl bond_mode_tbl[];
50 extern struct bond_parm_tbl bond_lacp_tbl[];
51 extern struct bond_parm_tbl xmit_hashtype_tbl[];
52 extern struct bond_parm_tbl arp_validate_tbl[];
54 static int expected_refcount = -1;
55 static struct class *netdev_class;
56 /*--------------------------- Data Structures -----------------------------*/
58 /* Bonding sysfs lock. Why can't we just use the 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;
116 down_write(&(bonding_rwsem));
117 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
118 ifname = command + 1;
119 if ((strlen(command) <= 1) ||
120 !dev_valid_name(ifname))
123 if (command[0] == '+') {
125 /* Check to see if the bond already exists. */
126 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
127 if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
128 printk(KERN_ERR DRV_NAME
129 ": cannot add bond %s; it already exists\n",
135 printk(KERN_INFO DRV_NAME
136 ": %s is being created...\n", ifname);
137 if (bond_create(ifname, &bonding_defaults, &bond)) {
138 printk(KERN_INFO DRV_NAME
139 ": %s interface already exists. Bond creation failed.\n",
146 if (command[0] == '-') {
147 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
148 if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
150 /* check the ref count on the bond's kobject.
151 * If it's > expected, then there's a file open,
152 * and we have to fail.
154 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
155 > expected_refcount){
157 printk(KERN_INFO DRV_NAME
158 ": Unable remove bond %s due to open references.\n",
163 printk(KERN_INFO DRV_NAME
164 ": %s is being deleted...\n",
171 printk(KERN_ERR DRV_NAME
172 ": unable to delete non-existent bond %s\n", ifname);
178 printk(KERN_ERR DRV_NAME
179 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
182 /* Always return either count or an error. If you return 0, you'll
183 * get called forever, which is bad.
186 up_write(&(bonding_rwsem));
189 /* class attribute for bond_masters file. This ends up in /sys/class/net */
190 static CLASS_ATTR(bonding_masters, S_IWUSR | S_IRUGO,
191 bonding_show_bonds, bonding_store_bonds);
193 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
195 char linkname[IFNAMSIZ+7];
198 /* first, create a link from the slave back to the master */
199 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
203 /* next, create a link from the master to the slave */
204 sprintf(linkname,"slave_%s",slave->name);
205 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
211 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
213 char linkname[IFNAMSIZ+7];
215 sysfs_remove_link(&(slave->dev.kobj), "master");
216 sprintf(linkname,"slave_%s",slave->name);
217 sysfs_remove_link(&(master->dev.kobj), linkname);
222 * Show the slaves in the current bond.
224 static ssize_t bonding_show_slaves(struct device *d,
225 struct device_attribute *attr, char *buf)
229 struct bonding *bond = to_bond(d);
231 read_lock(&bond->lock);
232 bond_for_each_slave(bond, slave, i) {
233 if (res > (PAGE_SIZE - IFNAMSIZ)) {
234 /* not enough space for another interface name */
235 if ((PAGE_SIZE - res) > 10)
236 res = PAGE_SIZE - 10;
237 res += sprintf(buf + res, "++more++ ");
240 res += sprintf(buf + res, "%s ", slave->dev->name);
242 read_unlock(&bond->lock);
244 buf[res-1] = '\n'; /* eat the leftover space */
249 * Set the slaves in the current bond. The bond interface must be
250 * up for this to succeed.
251 * This function is largely the same flow as bonding_update_bonds().
253 static ssize_t bonding_store_slaves(struct device *d,
254 struct device_attribute *attr,
255 const char *buffer, size_t count)
257 char command[IFNAMSIZ + 1] = { 0, };
259 int i, res, found, ret = count;
262 struct net_device *dev = NULL;
263 struct bonding *bond = to_bond(d);
265 /* Quick sanity check -- is the bond interface up? */
266 if (!(bond->dev->flags & IFF_UP)) {
267 printk(KERN_WARNING DRV_NAME
268 ": %s: doing slave updates when interface is down.\n",
272 /* Note: We can't hold bond->lock here, as bond_create grabs it. */
274 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
275 ifname = command + 1;
276 if ((strlen(command) <= 1) ||
277 !dev_valid_name(ifname))
280 if (command[0] == '+') {
282 /* Got a slave name in ifname. Is it already in the list? */
284 read_lock(&bond->lock);
285 bond_for_each_slave(bond, slave, i)
286 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
287 printk(KERN_ERR DRV_NAME
288 ": %s: Interface %s is already enslaved!\n",
289 bond->dev->name, ifname);
291 read_unlock(&bond->lock);
295 read_unlock(&bond->lock);
296 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
297 bond->dev->name, ifname);
298 dev = dev_get_by_name(&init_net, ifname);
300 printk(KERN_INFO DRV_NAME
301 ": %s: Interface %s does not exist!\n",
302 bond->dev->name, ifname);
309 if (dev->flags & IFF_UP) {
310 printk(KERN_ERR DRV_NAME
311 ": %s: Error: Unable to enslave %s "
312 "because it is already up.\n",
313 bond->dev->name, dev->name);
317 /* If this is the first slave, then we need to set
318 the master's hardware address to be the same as the
320 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
321 memcpy(bond->dev->dev_addr, dev->dev_addr,
325 /* Set the slave's MTU to match the bond */
326 original_mtu = dev->mtu;
327 if (dev->mtu != bond->dev->mtu) {
328 if (dev->change_mtu) {
329 res = dev->change_mtu(dev,
336 dev->mtu = bond->dev->mtu;
340 res = bond_enslave(bond->dev, dev);
341 bond_for_each_slave(bond, slave, i)
342 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
343 slave->original_mtu = original_mtu;
351 if (command[0] == '-') {
353 bond_for_each_slave(bond, slave, i)
354 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
356 original_mtu = slave->original_mtu;
360 printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
361 bond->dev->name, dev->name);
363 if (bond->setup_by_slave)
364 res = bond_release_and_destroy(bond->dev, dev);
366 res = bond_release(bond->dev, dev);
372 /* set the slave MTU to the default */
373 if (dev->change_mtu) {
374 dev->change_mtu(dev, original_mtu);
376 dev->mtu = original_mtu;
380 printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
381 ifname, bond->dev->name);
388 printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
395 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
398 * Show and set the bonding mode. The bond interface must be down to
401 static ssize_t bonding_show_mode(struct device *d,
402 struct device_attribute *attr, char *buf)
404 struct bonding *bond = to_bond(d);
406 return sprintf(buf, "%s %d\n",
407 bond_mode_tbl[bond->params.mode].modename,
411 static ssize_t bonding_store_mode(struct device *d,
412 struct device_attribute *attr,
413 const char *buf, size_t count)
415 int new_value, ret = count;
416 struct bonding *bond = to_bond(d);
418 if (bond->dev->flags & IFF_UP) {
419 printk(KERN_ERR DRV_NAME
420 ": unable to update mode of %s because interface is up.\n",
426 new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
428 printk(KERN_ERR DRV_NAME
429 ": %s: Ignoring invalid mode value %.*s.\n",
431 (int)strlen(buf) - 1, buf);
435 if (bond->params.mode == BOND_MODE_8023AD)
436 bond_unset_master_3ad_flags(bond);
438 if (bond->params.mode == BOND_MODE_ALB)
439 bond_unset_master_alb_flags(bond);
441 bond->params.mode = new_value;
442 bond_set_mode_ops(bond, bond->params.mode);
443 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
444 bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
449 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
452 * Show and set the bonding transmit hash method. The bond interface must be down to
453 * change the xmit hash policy.
455 static ssize_t bonding_show_xmit_hash(struct device *d,
456 struct device_attribute *attr,
459 struct bonding *bond = to_bond(d);
461 return sprintf(buf, "%s %d\n",
462 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
463 bond->params.xmit_policy);
466 static ssize_t bonding_store_xmit_hash(struct device *d,
467 struct device_attribute *attr,
468 const char *buf, size_t count)
470 int new_value, ret = count;
471 struct bonding *bond = to_bond(d);
473 if (bond->dev->flags & IFF_UP) {
474 printk(KERN_ERR DRV_NAME
475 "%s: Interface is up. Unable to update xmit policy.\n",
481 new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
483 printk(KERN_ERR DRV_NAME
484 ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
486 (int)strlen(buf) - 1, buf);
490 bond->params.xmit_policy = new_value;
491 bond_set_mode_ops(bond, bond->params.mode);
492 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
493 bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
498 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
501 * Show and set arp_validate.
503 static ssize_t bonding_show_arp_validate(struct device *d,
504 struct device_attribute *attr,
507 struct bonding *bond = to_bond(d);
509 return sprintf(buf, "%s %d\n",
510 arp_validate_tbl[bond->params.arp_validate].modename,
511 bond->params.arp_validate);
514 static ssize_t bonding_store_arp_validate(struct device *d,
515 struct device_attribute *attr,
516 const char *buf, size_t count)
519 struct bonding *bond = to_bond(d);
521 new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
523 printk(KERN_ERR DRV_NAME
524 ": %s: Ignoring invalid arp_validate value %s\n",
525 bond->dev->name, buf);
528 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
529 printk(KERN_ERR DRV_NAME
530 ": %s: arp_validate only supported in active-backup mode.\n",
534 printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
535 bond->dev->name, arp_validate_tbl[new_value].modename,
538 if (!bond->params.arp_validate && new_value) {
539 bond_register_arp(bond);
540 } else if (bond->params.arp_validate && !new_value) {
541 bond_unregister_arp(bond);
544 bond->params.arp_validate = new_value;
549 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
552 * Show and store fail_over_mac. User only allowed to change the
553 * value when there are no slaves.
555 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
557 struct bonding *bond = to_bond(d);
559 return sprintf(buf, "%d\n", bond->params.fail_over_mac) + 1;
562 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
566 struct bonding *bond = to_bond(d);
568 if (bond->slave_cnt != 0) {
569 printk(KERN_ERR DRV_NAME
570 ": %s: Can't alter fail_over_mac with slaves in bond.\n",
576 if (sscanf(buf, "%d", &new_value) != 1) {
577 printk(KERN_ERR DRV_NAME
578 ": %s: no fail_over_mac value specified.\n",
584 if ((new_value == 0) || (new_value == 1)) {
585 bond->params.fail_over_mac = new_value;
586 printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n",
587 bond->dev->name, new_value);
589 printk(KERN_INFO DRV_NAME
590 ": %s: Ignoring invalid fail_over_mac value %d.\n",
591 bond->dev->name, new_value);
597 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
600 * Show and set the arp timer interval. There are two tricky bits
601 * here. First, if ARP monitoring is activated, then we must disable
602 * MII monitoring. Second, if the ARP timer isn't running, we must
605 static ssize_t bonding_show_arp_interval(struct device *d,
606 struct device_attribute *attr,
609 struct bonding *bond = to_bond(d);
611 return sprintf(buf, "%d\n", bond->params.arp_interval);
614 static ssize_t bonding_store_arp_interval(struct device *d,
615 struct device_attribute *attr,
616 const char *buf, size_t count)
618 int new_value, ret = count;
619 struct bonding *bond = to_bond(d);
621 if (sscanf(buf, "%d", &new_value) != 1) {
622 printk(KERN_ERR DRV_NAME
623 ": %s: no arp_interval value specified.\n",
629 printk(KERN_ERR DRV_NAME
630 ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
631 bond->dev->name, new_value, INT_MAX);
636 printk(KERN_INFO DRV_NAME
637 ": %s: Setting ARP monitoring interval to %d.\n",
638 bond->dev->name, new_value);
639 bond->params.arp_interval = new_value;
640 if (bond->params.miimon) {
641 printk(KERN_INFO DRV_NAME
642 ": %s: ARP monitoring cannot be used with MII monitoring. "
643 "%s Disabling MII monitoring.\n",
644 bond->dev->name, bond->dev->name);
645 bond->params.miimon = 0;
646 if (delayed_work_pending(&bond->mii_work)) {
647 cancel_delayed_work(&bond->mii_work);
648 flush_workqueue(bond->wq);
651 if (!bond->params.arp_targets[0]) {
652 printk(KERN_INFO DRV_NAME
653 ": %s: ARP monitoring has been set up, "
654 "but no ARP targets have been specified.\n",
657 if (bond->dev->flags & IFF_UP) {
658 /* If the interface is up, we may need to fire off
659 * the ARP timer. If the interface is down, the
660 * timer will get fired off when the open function
663 if (!delayed_work_pending(&bond->arp_work)) {
664 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
665 INIT_DELAYED_WORK(&bond->arp_work,
666 bond_activebackup_arp_mon);
668 INIT_DELAYED_WORK(&bond->arp_work,
669 bond_loadbalance_arp_mon);
671 queue_delayed_work(bond->wq, &bond->arp_work, 0);
678 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
681 * Show and set the arp targets.
683 static ssize_t bonding_show_arp_targets(struct device *d,
684 struct device_attribute *attr,
688 struct bonding *bond = to_bond(d);
690 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
691 if (bond->params.arp_targets[i])
692 res += sprintf(buf + res, "%u.%u.%u.%u ",
693 NIPQUAD(bond->params.arp_targets[i]));
696 buf[res-1] = '\n'; /* eat the leftover space */
700 static ssize_t bonding_store_arp_targets(struct device *d,
701 struct device_attribute *attr,
702 const char *buf, size_t count)
705 int i = 0, done = 0, ret = count;
706 struct bonding *bond = to_bond(d);
709 targets = bond->params.arp_targets;
710 newtarget = in_aton(buf + 1);
713 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
714 printk(KERN_ERR DRV_NAME
715 ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
716 bond->dev->name, NIPQUAD(newtarget));
720 /* look for an empty slot to put the target in, and check for dupes */
721 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
722 if (targets[i] == newtarget) { /* duplicate */
723 printk(KERN_ERR DRV_NAME
724 ": %s: ARP target %u.%u.%u.%u is already present\n",
725 bond->dev->name, NIPQUAD(newtarget));
731 if (targets[i] == 0 && !done) {
732 printk(KERN_INFO DRV_NAME
733 ": %s: adding ARP target %d.%d.%d.%d.\n",
734 bond->dev->name, NIPQUAD(newtarget));
736 targets[i] = newtarget;
740 printk(KERN_ERR DRV_NAME
741 ": %s: ARP target table is full!\n",
748 else if (buf[0] == '-') {
749 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
750 printk(KERN_ERR DRV_NAME
751 ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
752 bond->dev->name, NIPQUAD(newtarget));
757 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
758 if (targets[i] == newtarget) {
759 printk(KERN_INFO DRV_NAME
760 ": %s: removing ARP target %d.%d.%d.%d.\n",
761 bond->dev->name, NIPQUAD(newtarget));
767 printk(KERN_INFO DRV_NAME
768 ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
769 bond->dev->name, NIPQUAD(newtarget));
775 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
784 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
787 * Show and set the up and down delays. These must be multiples of the
788 * MII monitoring value, and are stored internally as the multiplier.
789 * Thus, we must translate to MS for the real world.
791 static ssize_t bonding_show_downdelay(struct device *d,
792 struct device_attribute *attr,
795 struct bonding *bond = to_bond(d);
797 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
800 static ssize_t bonding_store_downdelay(struct device *d,
801 struct device_attribute *attr,
802 const char *buf, size_t count)
804 int new_value, ret = count;
805 struct bonding *bond = to_bond(d);
807 if (!(bond->params.miimon)) {
808 printk(KERN_ERR DRV_NAME
809 ": %s: Unable to set down delay as MII monitoring is disabled\n",
815 if (sscanf(buf, "%d", &new_value) != 1) {
816 printk(KERN_ERR DRV_NAME
817 ": %s: no down delay value specified.\n",
823 printk(KERN_ERR DRV_NAME
824 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
825 bond->dev->name, new_value, 1, INT_MAX);
829 if ((new_value % bond->params.miimon) != 0) {
830 printk(KERN_WARNING DRV_NAME
831 ": %s: Warning: down delay (%d) is not a multiple "
832 "of miimon (%d), delay rounded to %d ms\n",
833 bond->dev->name, new_value, bond->params.miimon,
834 (new_value / bond->params.miimon) *
835 bond->params.miimon);
837 bond->params.downdelay = new_value / bond->params.miimon;
838 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
839 bond->dev->name, bond->params.downdelay * bond->params.miimon);
846 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
848 static ssize_t bonding_show_updelay(struct device *d,
849 struct device_attribute *attr,
852 struct bonding *bond = to_bond(d);
854 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
858 static ssize_t bonding_store_updelay(struct device *d,
859 struct device_attribute *attr,
860 const char *buf, size_t count)
862 int new_value, ret = count;
863 struct bonding *bond = to_bond(d);
865 if (!(bond->params.miimon)) {
866 printk(KERN_ERR DRV_NAME
867 ": %s: Unable to set up delay as MII monitoring is disabled\n",
873 if (sscanf(buf, "%d", &new_value) != 1) {
874 printk(KERN_ERR DRV_NAME
875 ": %s: no up delay value specified.\n",
881 printk(KERN_ERR DRV_NAME
882 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
883 bond->dev->name, new_value, 1, INT_MAX);
887 if ((new_value % bond->params.miimon) != 0) {
888 printk(KERN_WARNING DRV_NAME
889 ": %s: Warning: up delay (%d) is not a multiple "
890 "of miimon (%d), updelay rounded to %d ms\n",
891 bond->dev->name, new_value, bond->params.miimon,
892 (new_value / bond->params.miimon) *
893 bond->params.miimon);
895 bond->params.updelay = new_value / bond->params.miimon;
896 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
897 bond->dev->name, bond->params.updelay * bond->params.miimon);
904 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
907 * Show and set the LACP interval. Interface must be down, and the mode
908 * must be set to 802.3ad mode.
910 static ssize_t bonding_show_lacp(struct device *d,
911 struct device_attribute *attr,
914 struct bonding *bond = to_bond(d);
916 return sprintf(buf, "%s %d\n",
917 bond_lacp_tbl[bond->params.lacp_fast].modename,
918 bond->params.lacp_fast);
921 static ssize_t bonding_store_lacp(struct device *d,
922 struct device_attribute *attr,
923 const char *buf, size_t count)
925 int new_value, ret = count;
926 struct bonding *bond = to_bond(d);
928 if (bond->dev->flags & IFF_UP) {
929 printk(KERN_ERR DRV_NAME
930 ": %s: Unable to update LACP rate because interface is up.\n",
936 if (bond->params.mode != BOND_MODE_8023AD) {
937 printk(KERN_ERR DRV_NAME
938 ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
944 new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
946 if ((new_value == 1) || (new_value == 0)) {
947 bond->params.lacp_fast = new_value;
948 printk(KERN_INFO DRV_NAME
949 ": %s: Setting LACP rate to %s (%d).\n",
950 bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
952 printk(KERN_ERR DRV_NAME
953 ": %s: Ignoring invalid LACP rate value %.*s.\n",
954 bond->dev->name, (int)strlen(buf) - 1, buf);
960 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
963 * Show and set the MII monitor interval. There are two tricky bits
964 * here. First, if MII monitoring is activated, then we must disable
965 * ARP monitoring. Second, if the timer isn't running, we must
968 static ssize_t bonding_show_miimon(struct device *d,
969 struct device_attribute *attr,
972 struct bonding *bond = to_bond(d);
974 return sprintf(buf, "%d\n", bond->params.miimon);
977 static ssize_t bonding_store_miimon(struct device *d,
978 struct device_attribute *attr,
979 const char *buf, size_t count)
981 int new_value, ret = count;
982 struct bonding *bond = to_bond(d);
984 if (sscanf(buf, "%d", &new_value) != 1) {
985 printk(KERN_ERR DRV_NAME
986 ": %s: no miimon value specified.\n",
992 printk(KERN_ERR DRV_NAME
993 ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
994 bond->dev->name, new_value, 1, INT_MAX);
998 printk(KERN_INFO DRV_NAME
999 ": %s: Setting MII monitoring interval to %d.\n",
1000 bond->dev->name, new_value);
1001 bond->params.miimon = new_value;
1002 if(bond->params.updelay)
1003 printk(KERN_INFO DRV_NAME
1004 ": %s: Note: Updating updelay (to %d) "
1005 "since it is a multiple of the miimon value.\n",
1007 bond->params.updelay * bond->params.miimon);
1008 if(bond->params.downdelay)
1009 printk(KERN_INFO DRV_NAME
1010 ": %s: Note: Updating downdelay (to %d) "
1011 "since it is a multiple of the miimon value.\n",
1013 bond->params.downdelay * bond->params.miimon);
1014 if (bond->params.arp_interval) {
1015 printk(KERN_INFO DRV_NAME
1016 ": %s: MII monitoring cannot be used with "
1017 "ARP monitoring. Disabling ARP monitoring...\n",
1019 bond->params.arp_interval = 0;
1020 if (bond->params.arp_validate) {
1021 bond_unregister_arp(bond);
1022 bond->params.arp_validate =
1023 BOND_ARP_VALIDATE_NONE;
1025 if (delayed_work_pending(&bond->arp_work)) {
1026 cancel_delayed_work(&bond->arp_work);
1027 flush_workqueue(bond->wq);
1031 if (bond->dev->flags & IFF_UP) {
1032 /* If the interface is up, we may need to fire off
1033 * the MII timer. If the interface is down, the
1034 * timer will get fired off when the open function
1037 if (!delayed_work_pending(&bond->mii_work)) {
1038 INIT_DELAYED_WORK(&bond->mii_work,
1040 queue_delayed_work(bond->wq,
1041 &bond->mii_work, 0);
1048 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1051 * Show and set the primary slave. The store function is much
1052 * simpler than bonding_store_slaves function because it only needs to
1053 * handle one interface name.
1054 * The bond must be a mode that supports a primary for this be
1057 static ssize_t bonding_show_primary(struct device *d,
1058 struct device_attribute *attr,
1062 struct bonding *bond = to_bond(d);
1064 if (bond->primary_slave)
1065 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1070 static ssize_t bonding_store_primary(struct device *d,
1071 struct device_attribute *attr,
1072 const char *buf, size_t count)
1075 struct slave *slave;
1076 struct bonding *bond = to_bond(d);
1079 read_lock(&bond->lock);
1080 write_lock_bh(&bond->curr_slave_lock);
1082 if (!USES_PRIMARY(bond->params.mode)) {
1083 printk(KERN_INFO DRV_NAME
1084 ": %s: Unable to set primary slave; %s is in mode %d\n",
1085 bond->dev->name, bond->dev->name, bond->params.mode);
1087 bond_for_each_slave(bond, slave, i) {
1089 (slave->dev->name, buf,
1090 strlen(slave->dev->name)) == 0) {
1091 printk(KERN_INFO DRV_NAME
1092 ": %s: Setting %s as primary slave.\n",
1093 bond->dev->name, slave->dev->name);
1094 bond->primary_slave = slave;
1095 bond_select_active_slave(bond);
1100 /* if we got here, then we didn't match the name of any slave */
1102 if (strlen(buf) == 0 || buf[0] == '\n') {
1103 printk(KERN_INFO DRV_NAME
1104 ": %s: Setting primary slave to None.\n",
1106 bond->primary_slave = NULL;
1107 bond_select_active_slave(bond);
1109 printk(KERN_INFO DRV_NAME
1110 ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1111 bond->dev->name, (int)strlen(buf) - 1, buf);
1115 write_unlock_bh(&bond->curr_slave_lock);
1116 read_unlock(&bond->lock);
1121 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1124 * Show and set the use_carrier flag.
1126 static ssize_t bonding_show_carrier(struct device *d,
1127 struct device_attribute *attr,
1130 struct bonding *bond = to_bond(d);
1132 return sprintf(buf, "%d\n", bond->params.use_carrier);
1135 static ssize_t bonding_store_carrier(struct device *d,
1136 struct device_attribute *attr,
1137 const char *buf, size_t count)
1139 int new_value, ret = count;
1140 struct bonding *bond = to_bond(d);
1143 if (sscanf(buf, "%d", &new_value) != 1) {
1144 printk(KERN_ERR DRV_NAME
1145 ": %s: no use_carrier value specified.\n",
1150 if ((new_value == 0) || (new_value == 1)) {
1151 bond->params.use_carrier = new_value;
1152 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1153 bond->dev->name, new_value);
1155 printk(KERN_INFO DRV_NAME
1156 ": %s: Ignoring invalid use_carrier value %d.\n",
1157 bond->dev->name, new_value);
1162 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1166 * Show and set currently active_slave.
1168 static ssize_t bonding_show_active_slave(struct device *d,
1169 struct device_attribute *attr,
1173 struct bonding *bond = to_bond(d);
1176 read_lock(&bond->curr_slave_lock);
1177 curr = bond->curr_active_slave;
1178 read_unlock(&bond->curr_slave_lock);
1180 if (USES_PRIMARY(bond->params.mode) && curr)
1181 count = sprintf(buf, "%s\n", curr->dev->name);
1185 static ssize_t bonding_store_active_slave(struct device *d,
1186 struct device_attribute *attr,
1187 const char *buf, size_t count)
1190 struct slave *slave;
1191 struct slave *old_active = NULL;
1192 struct slave *new_active = NULL;
1193 struct bonding *bond = to_bond(d);
1196 read_lock(&bond->lock);
1197 write_lock_bh(&bond->curr_slave_lock);
1199 if (!USES_PRIMARY(bond->params.mode)) {
1200 printk(KERN_INFO DRV_NAME
1201 ": %s: Unable to change active slave; %s is in mode %d\n",
1202 bond->dev->name, bond->dev->name, bond->params.mode);
1204 bond_for_each_slave(bond, slave, i) {
1206 (slave->dev->name, buf,
1207 strlen(slave->dev->name)) == 0) {
1208 old_active = bond->curr_active_slave;
1210 if (new_active == old_active) {
1212 printk(KERN_INFO DRV_NAME
1213 ": %s: %s is already the current active slave.\n",
1214 bond->dev->name, slave->dev->name);
1220 (new_active->link == BOND_LINK_UP) &&
1221 IS_UP(new_active->dev)) {
1222 printk(KERN_INFO DRV_NAME
1223 ": %s: Setting %s as active slave.\n",
1224 bond->dev->name, slave->dev->name);
1225 bond_change_active_slave(bond, new_active);
1228 printk(KERN_INFO DRV_NAME
1229 ": %s: Could not set %s as active slave; "
1230 "either %s is down or the link is down.\n",
1231 bond->dev->name, slave->dev->name,
1239 /* if we got here, then we didn't match the name of any slave */
1241 if (strlen(buf) == 0 || buf[0] == '\n') {
1242 printk(KERN_INFO DRV_NAME
1243 ": %s: Setting active slave to None.\n",
1245 bond->primary_slave = NULL;
1246 bond_select_active_slave(bond);
1248 printk(KERN_INFO DRV_NAME
1249 ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1250 bond->dev->name, (int)strlen(buf) - 1, buf);
1254 write_unlock_bh(&bond->curr_slave_lock);
1255 read_unlock(&bond->lock);
1261 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1265 * Show link status of the bond interface.
1267 static ssize_t bonding_show_mii_status(struct device *d,
1268 struct device_attribute *attr,
1272 struct bonding *bond = to_bond(d);
1274 read_lock(&bond->curr_slave_lock);
1275 curr = bond->curr_active_slave;
1276 read_unlock(&bond->curr_slave_lock);
1278 return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1280 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1284 * Show current 802.3ad aggregator ID.
1286 static ssize_t bonding_show_ad_aggregator(struct device *d,
1287 struct device_attribute *attr,
1291 struct bonding *bond = to_bond(d);
1293 if (bond->params.mode == BOND_MODE_8023AD) {
1294 struct ad_info ad_info;
1295 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.aggregator_id);
1300 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1304 * Show number of active 802.3ad ports.
1306 static ssize_t bonding_show_ad_num_ports(struct device *d,
1307 struct device_attribute *attr,
1311 struct bonding *bond = to_bond(d);
1313 if (bond->params.mode == BOND_MODE_8023AD) {
1314 struct ad_info ad_info;
1315 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0: ad_info.ports);
1320 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1324 * Show current 802.3ad actor key.
1326 static ssize_t bonding_show_ad_actor_key(struct device *d,
1327 struct device_attribute *attr,
1331 struct bonding *bond = to_bond(d);
1333 if (bond->params.mode == BOND_MODE_8023AD) {
1334 struct ad_info ad_info;
1335 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.actor_key);
1340 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1344 * Show current 802.3ad partner key.
1346 static ssize_t bonding_show_ad_partner_key(struct device *d,
1347 struct device_attribute *attr,
1351 struct bonding *bond = to_bond(d);
1353 if (bond->params.mode == BOND_MODE_8023AD) {
1354 struct ad_info ad_info;
1355 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.partner_key);
1360 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1364 * Show current 802.3ad partner mac.
1366 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1367 struct device_attribute *attr,
1371 struct bonding *bond = to_bond(d);
1372 DECLARE_MAC_BUF(mac);
1374 if (bond->params.mode == BOND_MODE_8023AD) {
1375 struct ad_info ad_info;
1376 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1377 count = sprintf(buf,"%s\n",
1378 print_mac(mac, ad_info.partner_system));
1384 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1388 static struct attribute *per_bond_attrs[] = {
1389 &dev_attr_slaves.attr,
1390 &dev_attr_mode.attr,
1391 &dev_attr_fail_over_mac.attr,
1392 &dev_attr_arp_validate.attr,
1393 &dev_attr_arp_interval.attr,
1394 &dev_attr_arp_ip_target.attr,
1395 &dev_attr_downdelay.attr,
1396 &dev_attr_updelay.attr,
1397 &dev_attr_lacp_rate.attr,
1398 &dev_attr_xmit_hash_policy.attr,
1399 &dev_attr_miimon.attr,
1400 &dev_attr_primary.attr,
1401 &dev_attr_use_carrier.attr,
1402 &dev_attr_active_slave.attr,
1403 &dev_attr_mii_status.attr,
1404 &dev_attr_ad_aggregator.attr,
1405 &dev_attr_ad_num_ports.attr,
1406 &dev_attr_ad_actor_key.attr,
1407 &dev_attr_ad_partner_key.attr,
1408 &dev_attr_ad_partner_mac.attr,
1412 static struct attribute_group bonding_group = {
1414 .attrs = per_bond_attrs,
1418 * Initialize sysfs. This sets up the bonding_masters file in
1421 int bond_create_sysfs(void)
1424 struct bonding *firstbond;
1426 init_rwsem(&bonding_rwsem);
1428 /* get the netdev class pointer */
1429 firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1433 netdev_class = firstbond->dev->dev.class;
1437 ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1439 * Permit multiple loads of the module by ignoring failures to
1440 * create the bonding_masters sysfs file. Bonding devices
1441 * created by second or subsequent loads of the module will
1442 * not be listed in, or controllable by, bonding_masters, but
1443 * will have the usual "bonding" sysfs directory.
1445 * This is done to preserve backwards compatibility for
1446 * initscripts/sysconfig, which load bonding multiple times to
1447 * configure multiple bonding devices.
1449 if (ret == -EEXIST) {
1450 netdev_class = NULL;
1459 * Remove /sys/class/net/bonding_masters.
1461 void bond_destroy_sysfs(void)
1464 class_remove_file(netdev_class, &class_attr_bonding_masters);
1468 * Initialize sysfs for each bond. This sets up and registers
1469 * the 'bondctl' directory for each individual bond under /sys/class/net.
1471 int bond_create_sysfs_entry(struct bonding *bond)
1473 struct net_device *dev = bond->dev;
1476 err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1478 printk(KERN_EMERG "eek! didn't create group!\n");
1481 if (expected_refcount < 1)
1482 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1487 * Remove sysfs entries for each bond.
1489 void bond_destroy_sysfs_entry(struct bonding *bond)
1491 struct net_device *dev = bond->dev;
1493 sysfs_remove_group(&(dev->dev.kobj), &bonding_group);