2 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/device.h>
28 #include <linux/sched.h>
30 #include <linux/types.h>
31 #include <linux/string.h>
32 #include <linux/netdevice.h>
33 #include <linux/inetdevice.h>
35 #include <linux/sysfs.h>
36 #include <linux/ctype.h>
37 #include <linux/inet.h>
38 #include <linux/rtnetlink.h>
39 #include <linux/etherdevice.h>
40 #include <net/net_namespace.h>
41 #include <net/netns/generic.h>
42 #include <linux/nsproxy.h>
46 #define to_dev(obj) container_of(obj, struct device, kobj)
47 #define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
50 * "show" function for the bond_masters attribute.
51 * The class parameter is ignored.
53 static ssize_t bonding_show_bonds(struct class *cls,
54 struct class_attribute *attr,
58 container_of(attr, struct bond_net, class_attr_bonding_masters);
64 list_for_each_entry(bond, &bn->dev_list, bond_list) {
65 if (res > (PAGE_SIZE - IFNAMSIZ)) {
66 /* not enough space for another interface name */
67 if ((PAGE_SIZE - res) > 10)
69 res += sprintf(buf + res, "++more++ ");
72 res += sprintf(buf + res, "%s ", bond->dev->name);
75 buf[res-1] = '\n'; /* eat the leftover space */
81 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
85 list_for_each_entry(bond, &bn->dev_list, bond_list) {
86 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
93 * "store" function for the bond_masters attribute. This is what
94 * creates and deletes entire bonds.
96 * The class parameter is ignored.
100 static ssize_t bonding_store_bonds(struct class *cls,
101 struct class_attribute *attr,
102 const char *buffer, size_t count)
104 struct bond_net *bn =
105 container_of(attr, struct bond_net, class_attr_bonding_masters);
106 char command[IFNAMSIZ + 1] = {0, };
110 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
111 ifname = command + 1;
112 if ((strlen(command) <= 1) ||
113 !dev_valid_name(ifname))
116 if (command[0] == '+') {
117 pr_info("%s is being created...\n", ifname);
118 rv = bond_create(bn->net, ifname);
121 pr_info("%s already exists.\n", ifname);
123 pr_info("%s creation failed.\n", ifname);
126 } else if (command[0] == '-') {
127 struct net_device *bond_dev;
130 bond_dev = bond_get_by_name(bn, ifname);
132 pr_info("%s is being deleted...\n", ifname);
133 unregister_netdevice(bond_dev);
135 pr_err("unable to delete non-existent %s\n", ifname);
142 /* Always return either count or an error. If you return 0, you'll
143 * get called forever, which is bad.
148 pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
152 static const void *bonding_namespace(struct class *cls,
153 const struct class_attribute *attr)
155 const struct bond_net *bn =
156 container_of(attr, struct bond_net, class_attr_bonding_masters);
160 /* class attribute for bond_masters file. This ends up in /sys/class/net */
161 static const struct class_attribute class_attr_bonding_masters = {
163 .name = "bonding_masters",
164 .mode = S_IWUSR | S_IRUGO,
166 .show = bonding_show_bonds,
167 .store = bonding_store_bonds,
168 .namespace = bonding_namespace,
171 int bond_create_slave_symlinks(struct net_device *master,
172 struct net_device *slave)
174 char linkname[IFNAMSIZ+7];
177 /* first, create a link from the slave back to the master */
178 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
182 /* next, create a link from the master to the slave */
183 sprintf(linkname, "slave_%s", slave->name);
184 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
187 /* free the master link created earlier in case of error */
189 sysfs_remove_link(&(slave->dev.kobj), "master");
195 void bond_destroy_slave_symlinks(struct net_device *master,
196 struct net_device *slave)
198 char linkname[IFNAMSIZ+7];
200 sysfs_remove_link(&(slave->dev.kobj), "master");
201 sprintf(linkname, "slave_%s", slave->name);
202 sysfs_remove_link(&(master->dev.kobj), linkname);
207 * Show the slaves in the current bond.
209 static ssize_t bonding_show_slaves(struct device *d,
210 struct device_attribute *attr, char *buf)
214 struct bonding *bond = to_bond(d);
216 read_lock(&bond->lock);
217 bond_for_each_slave(bond, slave, i) {
218 if (res > (PAGE_SIZE - IFNAMSIZ)) {
219 /* not enough space for another interface name */
220 if ((PAGE_SIZE - res) > 10)
221 res = PAGE_SIZE - 10;
222 res += sprintf(buf + res, "++more++ ");
225 res += sprintf(buf + res, "%s ", slave->dev->name);
227 read_unlock(&bond->lock);
229 buf[res-1] = '\n'; /* eat the leftover space */
234 * Set the slaves in the current bond. The bond interface must be
235 * up for this to succeed.
236 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
237 * All hard work should be done there.
239 static ssize_t bonding_store_slaves(struct device *d,
240 struct device_attribute *attr,
241 const char *buffer, size_t count)
243 char command[IFNAMSIZ + 1] = { 0, };
245 int res, ret = count;
246 struct net_device *dev;
247 struct bonding *bond = to_bond(d);
250 return restart_syscall();
252 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
253 ifname = command + 1;
254 if ((strlen(command) <= 1) ||
255 !dev_valid_name(ifname))
258 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
260 pr_info("%s: Interface %s does not exist!\n",
261 bond->dev->name, ifname);
266 switch (command[0]) {
268 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
269 res = bond_enslave(bond->dev, dev);
273 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
274 res = bond_release(bond->dev, dev);
286 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
295 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
296 bonding_store_slaves);
299 * Show and set the bonding mode. The bond interface must be down to
302 static ssize_t bonding_show_mode(struct device *d,
303 struct device_attribute *attr, char *buf)
305 struct bonding *bond = to_bond(d);
307 return sprintf(buf, "%s %d\n",
308 bond_mode_tbl[bond->params.mode].modename,
312 static ssize_t bonding_store_mode(struct device *d,
313 struct device_attribute *attr,
314 const char *buf, size_t count)
316 int new_value, ret = count;
317 struct bonding *bond = to_bond(d);
320 return restart_syscall();
322 if (bond->dev->flags & IFF_UP) {
323 pr_err("unable to update mode of %s because interface is up.\n",
329 if (bond->slave_cnt > 0) {
330 pr_err("unable to update mode of %s because it has slaves.\n",
336 new_value = bond_parse_parm(buf, bond_mode_tbl);
338 pr_err("%s: Ignoring invalid mode value %.*s.\n",
339 bond->dev->name, (int)strlen(buf) - 1, buf);
343 if ((new_value == BOND_MODE_ALB ||
344 new_value == BOND_MODE_TLB) &&
345 bond->params.arp_interval) {
346 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
347 bond->dev->name, bond_mode_tbl[new_value].modename);
352 bond->params.mode = new_value;
353 bond_set_mode_ops(bond, bond->params.mode);
354 pr_info("%s: setting mode to %s (%d).\n",
355 bond->dev->name, bond_mode_tbl[new_value].modename,
361 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
362 bonding_show_mode, bonding_store_mode);
365 * Show and set the bonding transmit hash method.
366 * The bond interface must be down to change the xmit hash policy.
368 static ssize_t bonding_show_xmit_hash(struct device *d,
369 struct device_attribute *attr,
372 struct bonding *bond = to_bond(d);
374 return sprintf(buf, "%s %d\n",
375 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
376 bond->params.xmit_policy);
379 static ssize_t bonding_store_xmit_hash(struct device *d,
380 struct device_attribute *attr,
381 const char *buf, size_t count)
383 int new_value, ret = count;
384 struct bonding *bond = to_bond(d);
386 if (bond->dev->flags & IFF_UP) {
387 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
393 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
395 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
397 (int)strlen(buf) - 1, buf);
401 bond->params.xmit_policy = new_value;
402 bond_set_mode_ops(bond, bond->params.mode);
403 pr_info("%s: setting xmit hash policy to %s (%d).\n",
405 xmit_hashtype_tbl[new_value].modename, new_value);
410 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
411 bonding_show_xmit_hash, bonding_store_xmit_hash);
414 * Show and set arp_validate.
416 static ssize_t bonding_show_arp_validate(struct device *d,
417 struct device_attribute *attr,
420 struct bonding *bond = to_bond(d);
422 return sprintf(buf, "%s %d\n",
423 arp_validate_tbl[bond->params.arp_validate].modename,
424 bond->params.arp_validate);
427 static ssize_t bonding_store_arp_validate(struct device *d,
428 struct device_attribute *attr,
429 const char *buf, size_t count)
432 struct bonding *bond = to_bond(d);
434 new_value = bond_parse_parm(buf, arp_validate_tbl);
436 pr_err("%s: Ignoring invalid arp_validate value %s\n",
437 bond->dev->name, buf);
440 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
441 pr_err("%s: arp_validate only supported in active-backup mode.\n",
445 pr_info("%s: setting arp_validate to %s (%d).\n",
446 bond->dev->name, arp_validate_tbl[new_value].modename,
449 bond->params.arp_validate = new_value;
454 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
455 bonding_store_arp_validate);
458 * Show and store fail_over_mac. User only allowed to change the
459 * value when there are no slaves.
461 static ssize_t bonding_show_fail_over_mac(struct device *d,
462 struct device_attribute *attr,
465 struct bonding *bond = to_bond(d);
467 return sprintf(buf, "%s %d\n",
468 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
469 bond->params.fail_over_mac);
472 static ssize_t bonding_store_fail_over_mac(struct device *d,
473 struct device_attribute *attr,
474 const char *buf, size_t count)
477 struct bonding *bond = to_bond(d);
479 if (bond->slave_cnt != 0) {
480 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
485 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
487 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
488 bond->dev->name, buf);
492 bond->params.fail_over_mac = new_value;
493 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
494 bond->dev->name, fail_over_mac_tbl[new_value].modename,
500 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
501 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
504 * Show and set the arp timer interval. There are two tricky bits
505 * here. First, if ARP monitoring is activated, then we must disable
506 * MII monitoring. Second, if the ARP timer isn't running, we must
509 static ssize_t bonding_show_arp_interval(struct device *d,
510 struct device_attribute *attr,
513 struct bonding *bond = to_bond(d);
515 return sprintf(buf, "%d\n", bond->params.arp_interval);
518 static ssize_t bonding_store_arp_interval(struct device *d,
519 struct device_attribute *attr,
520 const char *buf, size_t count)
522 int new_value, ret = count;
523 struct bonding *bond = to_bond(d);
526 return restart_syscall();
527 if (sscanf(buf, "%d", &new_value) != 1) {
528 pr_err("%s: no arp_interval value specified.\n",
534 pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n",
535 bond->dev->name, new_value, INT_MAX);
539 if (bond->params.mode == BOND_MODE_ALB ||
540 bond->params.mode == BOND_MODE_TLB) {
541 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
542 bond->dev->name, bond->dev->name);
546 pr_info("%s: Setting ARP monitoring interval to %d.\n",
547 bond->dev->name, new_value);
548 bond->params.arp_interval = new_value;
550 if (bond->params.miimon) {
551 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
552 bond->dev->name, bond->dev->name);
553 bond->params.miimon = 0;
555 if (!bond->params.arp_targets[0])
556 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
559 if (bond->dev->flags & IFF_UP) {
560 /* If the interface is up, we may need to fire off
561 * the ARP timer. If the interface is down, the
562 * timer will get fired off when the open function
566 cancel_delayed_work_sync(&bond->arp_work);
568 cancel_delayed_work_sync(&bond->mii_work);
569 queue_delayed_work(bond->wq, &bond->arp_work, 0);
576 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
577 bonding_show_arp_interval, bonding_store_arp_interval);
580 * Show and set the arp targets.
582 static ssize_t bonding_show_arp_targets(struct device *d,
583 struct device_attribute *attr,
587 struct bonding *bond = to_bond(d);
589 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
590 if (bond->params.arp_targets[i])
591 res += sprintf(buf + res, "%pI4 ",
592 &bond->params.arp_targets[i]);
595 buf[res-1] = '\n'; /* eat the leftover space */
599 static ssize_t bonding_store_arp_targets(struct device *d,
600 struct device_attribute *attr,
601 const char *buf, size_t count)
604 int i = 0, done = 0, ret = count;
605 struct bonding *bond = to_bond(d);
608 targets = bond->params.arp_targets;
609 newtarget = in_aton(buf + 1);
612 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
613 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
614 bond->dev->name, &newtarget);
618 /* look for an empty slot to put the target in, and check for dupes */
619 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
620 if (targets[i] == newtarget) { /* duplicate */
621 pr_err("%s: ARP target %pI4 is already present\n",
622 bond->dev->name, &newtarget);
626 if (targets[i] == 0) {
627 pr_info("%s: adding ARP target %pI4.\n",
628 bond->dev->name, &newtarget);
630 targets[i] = newtarget;
634 pr_err("%s: ARP target table is full!\n",
640 } else if (buf[0] == '-') {
641 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
642 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
643 bond->dev->name, &newtarget);
648 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
649 if (targets[i] == newtarget) {
651 pr_info("%s: removing ARP target %pI4.\n",
652 bond->dev->name, &newtarget);
653 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
654 targets[j] = targets[j+1];
661 pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
662 bond->dev->name, &newtarget);
667 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
676 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
679 * Show and set the up and down delays. These must be multiples of the
680 * MII monitoring value, and are stored internally as the multiplier.
681 * Thus, we must translate to MS for the real world.
683 static ssize_t bonding_show_downdelay(struct device *d,
684 struct device_attribute *attr,
687 struct bonding *bond = to_bond(d);
689 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
692 static ssize_t bonding_store_downdelay(struct device *d,
693 struct device_attribute *attr,
694 const char *buf, size_t count)
696 int new_value, ret = count;
697 struct bonding *bond = to_bond(d);
699 if (!(bond->params.miimon)) {
700 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
706 if (sscanf(buf, "%d", &new_value) != 1) {
707 pr_err("%s: no down delay value specified.\n", bond->dev->name);
712 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
713 bond->dev->name, new_value, 0, INT_MAX);
717 if ((new_value % bond->params.miimon) != 0) {
718 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
719 bond->dev->name, new_value,
721 (new_value / bond->params.miimon) *
722 bond->params.miimon);
724 bond->params.downdelay = new_value / bond->params.miimon;
725 pr_info("%s: Setting down delay to %d.\n",
727 bond->params.downdelay * bond->params.miimon);
734 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
735 bonding_show_downdelay, bonding_store_downdelay);
737 static ssize_t bonding_show_updelay(struct device *d,
738 struct device_attribute *attr,
741 struct bonding *bond = to_bond(d);
743 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
747 static ssize_t bonding_store_updelay(struct device *d,
748 struct device_attribute *attr,
749 const char *buf, size_t count)
751 int new_value, ret = count;
752 struct bonding *bond = to_bond(d);
754 if (!(bond->params.miimon)) {
755 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
761 if (sscanf(buf, "%d", &new_value) != 1) {
762 pr_err("%s: no up delay value specified.\n",
768 pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n",
769 bond->dev->name, new_value, 0, INT_MAX);
773 if ((new_value % bond->params.miimon) != 0) {
774 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
775 bond->dev->name, new_value,
777 (new_value / bond->params.miimon) *
778 bond->params.miimon);
780 bond->params.updelay = new_value / bond->params.miimon;
781 pr_info("%s: Setting up delay to %d.\n",
783 bond->params.updelay * bond->params.miimon);
789 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
790 bonding_show_updelay, bonding_store_updelay);
793 * Show and set the LACP interval. Interface must be down, and the mode
794 * must be set to 802.3ad mode.
796 static ssize_t bonding_show_lacp(struct device *d,
797 struct device_attribute *attr,
800 struct bonding *bond = to_bond(d);
802 return sprintf(buf, "%s %d\n",
803 bond_lacp_tbl[bond->params.lacp_fast].modename,
804 bond->params.lacp_fast);
807 static ssize_t bonding_store_lacp(struct device *d,
808 struct device_attribute *attr,
809 const char *buf, size_t count)
811 int new_value, ret = count;
812 struct bonding *bond = to_bond(d);
814 if (bond->dev->flags & IFF_UP) {
815 pr_err("%s: Unable to update LACP rate because interface is up.\n",
821 if (bond->params.mode != BOND_MODE_8023AD) {
822 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
828 new_value = bond_parse_parm(buf, bond_lacp_tbl);
830 if ((new_value == 1) || (new_value == 0)) {
831 bond->params.lacp_fast = new_value;
832 bond_3ad_update_lacp_rate(bond);
833 pr_info("%s: Setting LACP rate to %s (%d).\n",
834 bond->dev->name, bond_lacp_tbl[new_value].modename,
837 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
838 bond->dev->name, (int)strlen(buf) - 1, buf);
844 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
845 bonding_show_lacp, bonding_store_lacp);
847 static ssize_t bonding_show_min_links(struct device *d,
848 struct device_attribute *attr,
851 struct bonding *bond = to_bond(d);
853 return sprintf(buf, "%d\n", bond->params.min_links);
856 static ssize_t bonding_store_min_links(struct device *d,
857 struct device_attribute *attr,
858 const char *buf, size_t count)
860 struct bonding *bond = to_bond(d);
862 unsigned int new_value;
864 ret = kstrtouint(buf, 0, &new_value);
866 pr_err("%s: Ignoring invalid min links value %s.\n",
867 bond->dev->name, buf);
871 pr_info("%s: Setting min links value to %u\n",
872 bond->dev->name, new_value);
873 bond->params.min_links = new_value;
876 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
877 bonding_show_min_links, bonding_store_min_links);
879 static ssize_t bonding_show_ad_select(struct device *d,
880 struct device_attribute *attr,
883 struct bonding *bond = to_bond(d);
885 return sprintf(buf, "%s %d\n",
886 ad_select_tbl[bond->params.ad_select].modename,
887 bond->params.ad_select);
891 static ssize_t bonding_store_ad_select(struct device *d,
892 struct device_attribute *attr,
893 const char *buf, size_t count)
895 int new_value, ret = count;
896 struct bonding *bond = to_bond(d);
898 if (bond->dev->flags & IFF_UP) {
899 pr_err("%s: Unable to update ad_select because interface is up.\n",
905 new_value = bond_parse_parm(buf, ad_select_tbl);
907 if (new_value != -1) {
908 bond->params.ad_select = new_value;
909 pr_info("%s: Setting ad_select to %s (%d).\n",
910 bond->dev->name, ad_select_tbl[new_value].modename,
913 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
914 bond->dev->name, (int)strlen(buf) - 1, buf);
920 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
921 bonding_show_ad_select, bonding_store_ad_select);
924 * Show and set the number of peer notifications to send after a failover event.
926 static ssize_t bonding_show_num_peer_notif(struct device *d,
927 struct device_attribute *attr,
930 struct bonding *bond = to_bond(d);
931 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
934 static ssize_t bonding_store_num_peer_notif(struct device *d,
935 struct device_attribute *attr,
936 const char *buf, size_t count)
938 struct bonding *bond = to_bond(d);
939 int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
940 return err ? err : count;
942 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
943 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
944 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
945 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
948 * Show and set the MII monitor interval. There are two tricky bits
949 * here. First, if MII monitoring is activated, then we must disable
950 * ARP monitoring. Second, if the timer isn't running, we must
953 static ssize_t bonding_show_miimon(struct device *d,
954 struct device_attribute *attr,
957 struct bonding *bond = to_bond(d);
959 return sprintf(buf, "%d\n", bond->params.miimon);
962 static ssize_t bonding_store_miimon(struct device *d,
963 struct device_attribute *attr,
964 const char *buf, size_t count)
966 int new_value, ret = count;
967 struct bonding *bond = to_bond(d);
970 return restart_syscall();
971 if (sscanf(buf, "%d", &new_value) != 1) {
972 pr_err("%s: no miimon value specified.\n",
978 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
979 bond->dev->name, new_value, 0, INT_MAX);
983 pr_info("%s: Setting MII monitoring interval to %d.\n",
984 bond->dev->name, new_value);
985 bond->params.miimon = new_value;
986 if (bond->params.updelay)
987 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
989 bond->params.updelay * bond->params.miimon);
990 if (bond->params.downdelay)
991 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
993 bond->params.downdelay * bond->params.miimon);
994 if (new_value && bond->params.arp_interval) {
995 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
997 bond->params.arp_interval = 0;
998 if (bond->params.arp_validate)
999 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
1001 if (bond->dev->flags & IFF_UP) {
1002 /* If the interface is up, we may need to fire off
1003 * the MII timer. If the interface is down, the
1004 * timer will get fired off when the open function
1008 cancel_delayed_work_sync(&bond->mii_work);
1010 cancel_delayed_work_sync(&bond->arp_work);
1011 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1018 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1019 bonding_show_miimon, bonding_store_miimon);
1022 * Show and set the primary slave. The store function is much
1023 * simpler than bonding_store_slaves function because it only needs to
1024 * handle one interface name.
1025 * The bond must be a mode that supports a primary for this be
1028 static ssize_t bonding_show_primary(struct device *d,
1029 struct device_attribute *attr,
1033 struct bonding *bond = to_bond(d);
1035 if (bond->primary_slave)
1036 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1041 static ssize_t bonding_store_primary(struct device *d,
1042 struct device_attribute *attr,
1043 const char *buf, size_t count)
1046 struct slave *slave;
1047 struct bonding *bond = to_bond(d);
1048 char ifname[IFNAMSIZ];
1050 if (!rtnl_trylock())
1051 return restart_syscall();
1053 read_lock(&bond->lock);
1054 write_lock_bh(&bond->curr_slave_lock);
1056 if (!USES_PRIMARY(bond->params.mode)) {
1057 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1058 bond->dev->name, bond->dev->name, bond->params.mode);
1062 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1064 /* check to see if we are clearing primary */
1065 if (!strlen(ifname) || buf[0] == '\n') {
1066 pr_info("%s: Setting primary slave to None.\n",
1068 bond->primary_slave = NULL;
1069 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1070 bond_select_active_slave(bond);
1074 bond_for_each_slave(bond, slave, i) {
1075 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1076 pr_info("%s: Setting %s as primary slave.\n",
1077 bond->dev->name, slave->dev->name);
1078 bond->primary_slave = slave;
1079 strcpy(bond->params.primary, slave->dev->name);
1080 bond_select_active_slave(bond);
1085 strncpy(bond->params.primary, ifname, IFNAMSIZ);
1086 bond->params.primary[IFNAMSIZ - 1] = 0;
1088 pr_info("%s: Recording %s as primary, "
1089 "but it has not been enslaved to %s yet.\n",
1090 bond->dev->name, ifname, bond->dev->name);
1092 write_unlock_bh(&bond->curr_slave_lock);
1093 read_unlock(&bond->lock);
1094 unblock_netpoll_tx();
1099 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1100 bonding_show_primary, bonding_store_primary);
1103 * Show and set the primary_reselect flag.
1105 static ssize_t bonding_show_primary_reselect(struct device *d,
1106 struct device_attribute *attr,
1109 struct bonding *bond = to_bond(d);
1111 return sprintf(buf, "%s %d\n",
1112 pri_reselect_tbl[bond->params.primary_reselect].modename,
1113 bond->params.primary_reselect);
1116 static ssize_t bonding_store_primary_reselect(struct device *d,
1117 struct device_attribute *attr,
1118 const char *buf, size_t count)
1120 int new_value, ret = count;
1121 struct bonding *bond = to_bond(d);
1123 if (!rtnl_trylock())
1124 return restart_syscall();
1126 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1127 if (new_value < 0) {
1128 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1130 (int) strlen(buf) - 1, buf);
1135 bond->params.primary_reselect = new_value;
1136 pr_info("%s: setting primary_reselect to %s (%d).\n",
1137 bond->dev->name, pri_reselect_tbl[new_value].modename,
1141 read_lock(&bond->lock);
1142 write_lock_bh(&bond->curr_slave_lock);
1143 bond_select_active_slave(bond);
1144 write_unlock_bh(&bond->curr_slave_lock);
1145 read_unlock(&bond->lock);
1146 unblock_netpoll_tx();
1151 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1152 bonding_show_primary_reselect,
1153 bonding_store_primary_reselect);
1156 * Show and set the use_carrier flag.
1158 static ssize_t bonding_show_carrier(struct device *d,
1159 struct device_attribute *attr,
1162 struct bonding *bond = to_bond(d);
1164 return sprintf(buf, "%d\n", bond->params.use_carrier);
1167 static ssize_t bonding_store_carrier(struct device *d,
1168 struct device_attribute *attr,
1169 const char *buf, size_t count)
1171 int new_value, ret = count;
1172 struct bonding *bond = to_bond(d);
1175 if (sscanf(buf, "%d", &new_value) != 1) {
1176 pr_err("%s: no use_carrier value specified.\n",
1181 if ((new_value == 0) || (new_value == 1)) {
1182 bond->params.use_carrier = new_value;
1183 pr_info("%s: Setting use_carrier to %d.\n",
1184 bond->dev->name, new_value);
1186 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1187 bond->dev->name, new_value);
1192 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1193 bonding_show_carrier, bonding_store_carrier);
1197 * Show and set currently active_slave.
1199 static ssize_t bonding_show_active_slave(struct device *d,
1200 struct device_attribute *attr,
1204 struct bonding *bond = to_bond(d);
1207 read_lock(&bond->curr_slave_lock);
1208 curr = bond->curr_active_slave;
1209 read_unlock(&bond->curr_slave_lock);
1211 if (USES_PRIMARY(bond->params.mode) && curr)
1212 count = sprintf(buf, "%s\n", curr->dev->name);
1216 static ssize_t bonding_store_active_slave(struct device *d,
1217 struct device_attribute *attr,
1218 const char *buf, size_t count)
1221 struct slave *slave;
1222 struct slave *old_active = NULL;
1223 struct slave *new_active = NULL;
1224 struct bonding *bond = to_bond(d);
1225 char ifname[IFNAMSIZ];
1227 if (!rtnl_trylock())
1228 return restart_syscall();
1231 read_lock(&bond->lock);
1232 write_lock_bh(&bond->curr_slave_lock);
1234 if (!USES_PRIMARY(bond->params.mode)) {
1235 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1236 bond->dev->name, bond->dev->name, bond->params.mode);
1240 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1242 /* check to see if we are clearing active */
1243 if (!strlen(ifname) || buf[0] == '\n') {
1244 pr_info("%s: Clearing current active slave.\n",
1246 bond->curr_active_slave = NULL;
1247 bond_select_active_slave(bond);
1251 bond_for_each_slave(bond, slave, i) {
1252 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1253 old_active = bond->curr_active_slave;
1255 if (new_active == old_active) {
1257 pr_info("%s: %s is already the current"
1266 (new_active->link == BOND_LINK_UP) &&
1267 IS_UP(new_active->dev)) {
1268 pr_info("%s: Setting %s as active"
1272 bond_change_active_slave(bond,
1276 pr_info("%s: Could not set %s as"
1277 " active slave; either %s is"
1278 " down or the link is down.\n",
1288 pr_info("%s: Unable to set %.*s as active slave.\n",
1289 bond->dev->name, (int)strlen(buf) - 1, buf);
1291 write_unlock_bh(&bond->curr_slave_lock);
1292 read_unlock(&bond->lock);
1293 unblock_netpoll_tx();
1300 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1301 bonding_show_active_slave, bonding_store_active_slave);
1305 * Show link status of the bond interface.
1307 static ssize_t bonding_show_mii_status(struct device *d,
1308 struct device_attribute *attr,
1312 struct bonding *bond = to_bond(d);
1314 read_lock(&bond->curr_slave_lock);
1315 curr = bond->curr_active_slave;
1316 read_unlock(&bond->curr_slave_lock);
1318 return sprintf(buf, "%s\n", curr ? "up" : "down");
1320 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1323 * Show current 802.3ad aggregator ID.
1325 static ssize_t bonding_show_ad_aggregator(struct device *d,
1326 struct device_attribute *attr,
1330 struct bonding *bond = to_bond(d);
1332 if (bond->params.mode == BOND_MODE_8023AD) {
1333 struct ad_info ad_info;
1334 count = sprintf(buf, "%d\n",
1335 bond_3ad_get_active_agg_info(bond, &ad_info)
1336 ? 0 : ad_info.aggregator_id);
1341 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1345 * Show number of active 802.3ad ports.
1347 static ssize_t bonding_show_ad_num_ports(struct device *d,
1348 struct device_attribute *attr,
1352 struct bonding *bond = to_bond(d);
1354 if (bond->params.mode == BOND_MODE_8023AD) {
1355 struct ad_info ad_info;
1356 count = sprintf(buf, "%d\n",
1357 bond_3ad_get_active_agg_info(bond, &ad_info)
1358 ? 0 : ad_info.ports);
1363 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1367 * Show current 802.3ad actor key.
1369 static ssize_t bonding_show_ad_actor_key(struct device *d,
1370 struct device_attribute *attr,
1374 struct bonding *bond = to_bond(d);
1376 if (bond->params.mode == BOND_MODE_8023AD) {
1377 struct ad_info ad_info;
1378 count = sprintf(buf, "%d\n",
1379 bond_3ad_get_active_agg_info(bond, &ad_info)
1380 ? 0 : ad_info.actor_key);
1385 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1389 * Show current 802.3ad partner key.
1391 static ssize_t bonding_show_ad_partner_key(struct device *d,
1392 struct device_attribute *attr,
1396 struct bonding *bond = to_bond(d);
1398 if (bond->params.mode == BOND_MODE_8023AD) {
1399 struct ad_info ad_info;
1400 count = sprintf(buf, "%d\n",
1401 bond_3ad_get_active_agg_info(bond, &ad_info)
1402 ? 0 : ad_info.partner_key);
1407 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1411 * Show current 802.3ad partner mac.
1413 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1414 struct device_attribute *attr,
1418 struct bonding *bond = to_bond(d);
1420 if (bond->params.mode == BOND_MODE_8023AD) {
1421 struct ad_info ad_info;
1422 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1423 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1428 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1431 * Show the queue_ids of the slaves in the current bond.
1433 static ssize_t bonding_show_queue_id(struct device *d,
1434 struct device_attribute *attr,
1437 struct slave *slave;
1439 struct bonding *bond = to_bond(d);
1441 if (!rtnl_trylock())
1442 return restart_syscall();
1444 read_lock(&bond->lock);
1445 bond_for_each_slave(bond, slave, i) {
1446 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1447 /* not enough space for another interface_name:queue_id pair */
1448 if ((PAGE_SIZE - res) > 10)
1449 res = PAGE_SIZE - 10;
1450 res += sprintf(buf + res, "++more++ ");
1453 res += sprintf(buf + res, "%s:%d ",
1454 slave->dev->name, slave->queue_id);
1456 read_unlock(&bond->lock);
1458 buf[res-1] = '\n'; /* eat the leftover space */
1464 * Set the queue_ids of the slaves in the current bond. The bond
1465 * interface must be enslaved for this to work.
1467 static ssize_t bonding_store_queue_id(struct device *d,
1468 struct device_attribute *attr,
1469 const char *buffer, size_t count)
1471 struct slave *slave, *update_slave;
1472 struct bonding *bond = to_bond(d);
1476 struct net_device *sdev = NULL;
1478 if (!rtnl_trylock())
1479 return restart_syscall();
1481 /* delim will point to queue id if successful */
1482 delim = strchr(buffer, ':');
1487 * Terminate string that points to device name and bump it
1488 * up one, so we can read the queue id there.
1491 if (sscanf(++delim, "%hd\n", &qid) != 1)
1494 /* Check buffer length, valid ifname and queue id */
1495 if (strlen(buffer) > IFNAMSIZ ||
1496 !dev_valid_name(buffer) ||
1497 qid > bond->dev->real_num_tx_queues)
1500 /* Get the pointer to that interface if it exists */
1501 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1505 read_lock(&bond->lock);
1507 /* Search for thes slave and check for duplicate qids */
1508 update_slave = NULL;
1509 bond_for_each_slave(bond, slave, i) {
1510 if (sdev == slave->dev)
1512 * We don't need to check the matching
1513 * slave for dups, since we're overwriting it
1515 update_slave = slave;
1516 else if (qid && qid == slave->queue_id) {
1517 goto err_no_cmd_unlock;
1522 goto err_no_cmd_unlock;
1524 /* Actually set the qids for the slave */
1525 update_slave->queue_id = qid;
1527 read_unlock(&bond->lock);
1533 read_unlock(&bond->lock);
1535 pr_info("invalid input for queue_id set for %s.\n",
1541 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1542 bonding_store_queue_id);
1546 * Show and set the all_slaves_active flag.
1548 static ssize_t bonding_show_slaves_active(struct device *d,
1549 struct device_attribute *attr,
1552 struct bonding *bond = to_bond(d);
1554 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1557 static ssize_t bonding_store_slaves_active(struct device *d,
1558 struct device_attribute *attr,
1559 const char *buf, size_t count)
1561 int i, new_value, ret = count;
1562 struct bonding *bond = to_bond(d);
1563 struct slave *slave;
1565 if (sscanf(buf, "%d", &new_value) != 1) {
1566 pr_err("%s: no all_slaves_active value specified.\n",
1572 if (new_value == bond->params.all_slaves_active)
1575 if ((new_value == 0) || (new_value == 1)) {
1576 bond->params.all_slaves_active = new_value;
1578 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1579 bond->dev->name, new_value);
1584 read_lock(&bond->lock);
1585 bond_for_each_slave(bond, slave, i) {
1586 if (!bond_is_active_slave(slave)) {
1588 slave->inactive = 0;
1590 slave->inactive = 1;
1593 read_unlock(&bond->lock);
1597 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1598 bonding_show_slaves_active, bonding_store_slaves_active);
1601 * Show and set the number of IGMP membership reports to send on link failure
1603 static ssize_t bonding_show_resend_igmp(struct device *d,
1604 struct device_attribute *attr,
1607 struct bonding *bond = to_bond(d);
1609 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1612 static ssize_t bonding_store_resend_igmp(struct device *d,
1613 struct device_attribute *attr,
1614 const char *buf, size_t count)
1616 int new_value, ret = count;
1617 struct bonding *bond = to_bond(d);
1619 if (sscanf(buf, "%d", &new_value) != 1) {
1620 pr_err("%s: no resend_igmp value specified.\n",
1626 if (new_value < 0 || new_value > 255) {
1627 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1628 bond->dev->name, new_value);
1633 pr_info("%s: Setting resend_igmp to %d.\n",
1634 bond->dev->name, new_value);
1635 bond->params.resend_igmp = new_value;
1640 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1641 bonding_show_resend_igmp, bonding_store_resend_igmp);
1643 static struct attribute *per_bond_attrs[] = {
1644 &dev_attr_slaves.attr,
1645 &dev_attr_mode.attr,
1646 &dev_attr_fail_over_mac.attr,
1647 &dev_attr_arp_validate.attr,
1648 &dev_attr_arp_interval.attr,
1649 &dev_attr_arp_ip_target.attr,
1650 &dev_attr_downdelay.attr,
1651 &dev_attr_updelay.attr,
1652 &dev_attr_lacp_rate.attr,
1653 &dev_attr_ad_select.attr,
1654 &dev_attr_xmit_hash_policy.attr,
1655 &dev_attr_num_grat_arp.attr,
1656 &dev_attr_num_unsol_na.attr,
1657 &dev_attr_miimon.attr,
1658 &dev_attr_primary.attr,
1659 &dev_attr_primary_reselect.attr,
1660 &dev_attr_use_carrier.attr,
1661 &dev_attr_active_slave.attr,
1662 &dev_attr_mii_status.attr,
1663 &dev_attr_ad_aggregator.attr,
1664 &dev_attr_ad_num_ports.attr,
1665 &dev_attr_ad_actor_key.attr,
1666 &dev_attr_ad_partner_key.attr,
1667 &dev_attr_ad_partner_mac.attr,
1668 &dev_attr_queue_id.attr,
1669 &dev_attr_all_slaves_active.attr,
1670 &dev_attr_resend_igmp.attr,
1671 &dev_attr_min_links.attr,
1675 static struct attribute_group bonding_group = {
1677 .attrs = per_bond_attrs,
1681 * Initialize sysfs. This sets up the bonding_masters file in
1684 int bond_create_sysfs(struct bond_net *bn)
1688 bn->class_attr_bonding_masters = class_attr_bonding_masters;
1689 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1691 ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1693 * Permit multiple loads of the module by ignoring failures to
1694 * create the bonding_masters sysfs file. Bonding devices
1695 * created by second or subsequent loads of the module will
1696 * not be listed in, or controllable by, bonding_masters, but
1697 * will have the usual "bonding" sysfs directory.
1699 * This is done to preserve backwards compatibility for
1700 * initscripts/sysconfig, which load bonding multiple times to
1701 * configure multiple bonding devices.
1703 if (ret == -EEXIST) {
1704 /* Is someone being kinky and naming a device bonding_master? */
1705 if (__dev_get_by_name(bn->net,
1706 class_attr_bonding_masters.attr.name))
1707 pr_err("network device named %s already exists in sysfs",
1708 class_attr_bonding_masters.attr.name);
1717 * Remove /sys/class/net/bonding_masters.
1719 void bond_destroy_sysfs(struct bond_net *bn)
1721 netdev_class_remove_file(&bn->class_attr_bonding_masters);
1725 * Initialize sysfs for each bond. This sets up and registers
1726 * the 'bondctl' directory for each individual bond under /sys/class/net.
1728 void bond_prepare_sysfs_group(struct bonding *bond)
1730 bond->dev->sysfs_groups[0] = &bonding_group;