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),
190 void bond_destroy_slave_symlinks(struct net_device *master,
191 struct net_device *slave)
193 char linkname[IFNAMSIZ+7];
195 sysfs_remove_link(&(slave->dev.kobj), "master");
196 sprintf(linkname, "slave_%s", slave->name);
197 sysfs_remove_link(&(master->dev.kobj), linkname);
202 * Show the slaves in the current bond.
204 static ssize_t bonding_show_slaves(struct device *d,
205 struct device_attribute *attr, char *buf)
209 struct bonding *bond = to_bond(d);
211 read_lock(&bond->lock);
212 bond_for_each_slave(bond, slave, i) {
213 if (res > (PAGE_SIZE - IFNAMSIZ)) {
214 /* not enough space for another interface name */
215 if ((PAGE_SIZE - res) > 10)
216 res = PAGE_SIZE - 10;
217 res += sprintf(buf + res, "++more++ ");
220 res += sprintf(buf + res, "%s ", slave->dev->name);
222 read_unlock(&bond->lock);
224 buf[res-1] = '\n'; /* eat the leftover space */
229 * Set the slaves in the current bond. The bond interface must be
230 * up for this to succeed.
231 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
232 * All hard work should be done there.
234 static ssize_t bonding_store_slaves(struct device *d,
235 struct device_attribute *attr,
236 const char *buffer, size_t count)
238 char command[IFNAMSIZ + 1] = { 0, };
240 int res, ret = count;
241 struct net_device *dev;
242 struct bonding *bond = to_bond(d);
245 return restart_syscall();
247 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
248 ifname = command + 1;
249 if ((strlen(command) <= 1) ||
250 !dev_valid_name(ifname))
253 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
255 pr_info("%s: Interface %s does not exist!\n",
256 bond->dev->name, ifname);
261 switch (command[0]) {
263 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
264 res = bond_enslave(bond->dev, dev);
268 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
269 res = bond_release(bond->dev, dev);
281 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
290 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
291 bonding_store_slaves);
294 * Show and set the bonding mode. The bond interface must be down to
297 static ssize_t bonding_show_mode(struct device *d,
298 struct device_attribute *attr, char *buf)
300 struct bonding *bond = to_bond(d);
302 return sprintf(buf, "%s %d\n",
303 bond_mode_tbl[bond->params.mode].modename,
307 static ssize_t bonding_store_mode(struct device *d,
308 struct device_attribute *attr,
309 const char *buf, size_t count)
311 int new_value, ret = count;
312 struct bonding *bond = to_bond(d);
314 if (bond->dev->flags & IFF_UP) {
315 pr_err("unable to update mode of %s because interface is up.\n",
321 if (bond->slave_cnt > 0) {
322 pr_err("unable to update mode of %s because it has slaves.\n",
328 new_value = bond_parse_parm(buf, bond_mode_tbl);
330 pr_err("%s: Ignoring invalid mode value %.*s.\n",
331 bond->dev->name, (int)strlen(buf) - 1, buf);
335 if ((new_value == BOND_MODE_ALB ||
336 new_value == BOND_MODE_TLB) &&
337 bond->params.arp_interval) {
338 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
339 bond->dev->name, bond_mode_tbl[new_value].modename);
344 bond->params.mode = new_value;
345 bond_set_mode_ops(bond, bond->params.mode);
346 pr_info("%s: setting mode to %s (%d).\n",
347 bond->dev->name, bond_mode_tbl[new_value].modename,
352 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
353 bonding_show_mode, bonding_store_mode);
356 * Show and set the bonding transmit hash method.
357 * The bond interface must be down to change the xmit hash policy.
359 static ssize_t bonding_show_xmit_hash(struct device *d,
360 struct device_attribute *attr,
363 struct bonding *bond = to_bond(d);
365 return sprintf(buf, "%s %d\n",
366 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
367 bond->params.xmit_policy);
370 static ssize_t bonding_store_xmit_hash(struct device *d,
371 struct device_attribute *attr,
372 const char *buf, size_t count)
374 int new_value, ret = count;
375 struct bonding *bond = to_bond(d);
377 if (bond->dev->flags & IFF_UP) {
378 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
384 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
386 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
388 (int)strlen(buf) - 1, buf);
392 bond->params.xmit_policy = new_value;
393 bond_set_mode_ops(bond, bond->params.mode);
394 pr_info("%s: setting xmit hash policy to %s (%d).\n",
396 xmit_hashtype_tbl[new_value].modename, new_value);
401 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
402 bonding_show_xmit_hash, bonding_store_xmit_hash);
405 * Show and set arp_validate.
407 static ssize_t bonding_show_arp_validate(struct device *d,
408 struct device_attribute *attr,
411 struct bonding *bond = to_bond(d);
413 return sprintf(buf, "%s %d\n",
414 arp_validate_tbl[bond->params.arp_validate].modename,
415 bond->params.arp_validate);
418 static ssize_t bonding_store_arp_validate(struct device *d,
419 struct device_attribute *attr,
420 const char *buf, size_t count)
423 struct bonding *bond = to_bond(d);
425 new_value = bond_parse_parm(buf, arp_validate_tbl);
427 pr_err("%s: Ignoring invalid arp_validate value %s\n",
428 bond->dev->name, buf);
431 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
432 pr_err("%s: arp_validate only supported in active-backup mode.\n",
436 pr_info("%s: setting arp_validate to %s (%d).\n",
437 bond->dev->name, arp_validate_tbl[new_value].modename,
440 bond->params.arp_validate = new_value;
445 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
446 bonding_store_arp_validate);
449 * Show and store fail_over_mac. User only allowed to change the
450 * value when there are no slaves.
452 static ssize_t bonding_show_fail_over_mac(struct device *d,
453 struct device_attribute *attr,
456 struct bonding *bond = to_bond(d);
458 return sprintf(buf, "%s %d\n",
459 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
460 bond->params.fail_over_mac);
463 static ssize_t bonding_store_fail_over_mac(struct device *d,
464 struct device_attribute *attr,
465 const char *buf, size_t count)
468 struct bonding *bond = to_bond(d);
470 if (bond->slave_cnt != 0) {
471 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
476 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
478 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
479 bond->dev->name, buf);
483 bond->params.fail_over_mac = new_value;
484 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
485 bond->dev->name, fail_over_mac_tbl[new_value].modename,
491 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
492 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
495 * Show and set the arp timer interval. There are two tricky bits
496 * here. First, if ARP monitoring is activated, then we must disable
497 * MII monitoring. Second, if the ARP timer isn't running, we must
500 static ssize_t bonding_show_arp_interval(struct device *d,
501 struct device_attribute *attr,
504 struct bonding *bond = to_bond(d);
506 return sprintf(buf, "%d\n", bond->params.arp_interval);
509 static ssize_t bonding_store_arp_interval(struct device *d,
510 struct device_attribute *attr,
511 const char *buf, size_t count)
513 int new_value, ret = count;
514 struct bonding *bond = to_bond(d);
517 return restart_syscall();
518 if (sscanf(buf, "%d", &new_value) != 1) {
519 pr_err("%s: no arp_interval value specified.\n",
525 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
526 bond->dev->name, new_value, INT_MAX);
530 if (bond->params.mode == BOND_MODE_ALB ||
531 bond->params.mode == BOND_MODE_TLB) {
532 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
533 bond->dev->name, bond->dev->name);
537 pr_info("%s: Setting ARP monitoring interval to %d.\n",
538 bond->dev->name, new_value);
539 bond->params.arp_interval = new_value;
540 if (bond->params.miimon) {
541 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
542 bond->dev->name, bond->dev->name);
543 bond->params.miimon = 0;
545 if (!bond->params.arp_targets[0]) {
546 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
549 if (bond->dev->flags & IFF_UP) {
550 /* If the interface is up, we may need to fire off
551 * the ARP timer. If the interface is down, the
552 * timer will get fired off when the open function
555 cancel_delayed_work_sync(&bond->mii_work);
556 queue_delayed_work(bond->wq, &bond->arp_work, 0);
563 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
564 bonding_show_arp_interval, bonding_store_arp_interval);
567 * Show and set the arp targets.
569 static ssize_t bonding_show_arp_targets(struct device *d,
570 struct device_attribute *attr,
574 struct bonding *bond = to_bond(d);
576 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
577 if (bond->params.arp_targets[i])
578 res += sprintf(buf + res, "%pI4 ",
579 &bond->params.arp_targets[i]);
582 buf[res-1] = '\n'; /* eat the leftover space */
586 static ssize_t bonding_store_arp_targets(struct device *d,
587 struct device_attribute *attr,
588 const char *buf, size_t count)
591 int i = 0, done = 0, ret = count;
592 struct bonding *bond = to_bond(d);
595 targets = bond->params.arp_targets;
596 newtarget = in_aton(buf + 1);
599 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
600 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
601 bond->dev->name, &newtarget);
605 /* look for an empty slot to put the target in, and check for dupes */
606 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
607 if (targets[i] == newtarget) { /* duplicate */
608 pr_err("%s: ARP target %pI4 is already present\n",
609 bond->dev->name, &newtarget);
613 if (targets[i] == 0) {
614 pr_info("%s: adding ARP target %pI4.\n",
615 bond->dev->name, &newtarget);
617 targets[i] = newtarget;
621 pr_err("%s: ARP target table is full!\n",
627 } else if (buf[0] == '-') {
628 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
629 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
630 bond->dev->name, &newtarget);
635 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
636 if (targets[i] == newtarget) {
638 pr_info("%s: removing ARP target %pI4.\n",
639 bond->dev->name, &newtarget);
640 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
641 targets[j] = targets[j+1];
648 pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
649 bond->dev->name, &newtarget);
654 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
663 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
666 * Show and set the up and down delays. These must be multiples of the
667 * MII monitoring value, and are stored internally as the multiplier.
668 * Thus, we must translate to MS for the real world.
670 static ssize_t bonding_show_downdelay(struct device *d,
671 struct device_attribute *attr,
674 struct bonding *bond = to_bond(d);
676 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
679 static ssize_t bonding_store_downdelay(struct device *d,
680 struct device_attribute *attr,
681 const char *buf, size_t count)
683 int new_value, ret = count;
684 struct bonding *bond = to_bond(d);
686 if (!(bond->params.miimon)) {
687 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
693 if (sscanf(buf, "%d", &new_value) != 1) {
694 pr_err("%s: no down delay value specified.\n", bond->dev->name);
699 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
700 bond->dev->name, new_value, 1, INT_MAX);
704 if ((new_value % bond->params.miimon) != 0) {
705 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
706 bond->dev->name, new_value,
708 (new_value / bond->params.miimon) *
709 bond->params.miimon);
711 bond->params.downdelay = new_value / bond->params.miimon;
712 pr_info("%s: Setting down delay to %d.\n",
714 bond->params.downdelay * bond->params.miimon);
721 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
722 bonding_show_downdelay, bonding_store_downdelay);
724 static ssize_t bonding_show_updelay(struct device *d,
725 struct device_attribute *attr,
728 struct bonding *bond = to_bond(d);
730 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
734 static ssize_t bonding_store_updelay(struct device *d,
735 struct device_attribute *attr,
736 const char *buf, size_t count)
738 int new_value, ret = count;
739 struct bonding *bond = to_bond(d);
741 if (!(bond->params.miimon)) {
742 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
748 if (sscanf(buf, "%d", &new_value) != 1) {
749 pr_err("%s: no up delay value specified.\n",
755 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
756 bond->dev->name, new_value, 1, INT_MAX);
760 if ((new_value % bond->params.miimon) != 0) {
761 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
762 bond->dev->name, new_value,
764 (new_value / bond->params.miimon) *
765 bond->params.miimon);
767 bond->params.updelay = new_value / bond->params.miimon;
768 pr_info("%s: Setting up delay to %d.\n",
770 bond->params.updelay * bond->params.miimon);
776 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
777 bonding_show_updelay, bonding_store_updelay);
780 * Show and set the LACP interval. Interface must be down, and the mode
781 * must be set to 802.3ad mode.
783 static ssize_t bonding_show_lacp(struct device *d,
784 struct device_attribute *attr,
787 struct bonding *bond = to_bond(d);
789 return sprintf(buf, "%s %d\n",
790 bond_lacp_tbl[bond->params.lacp_fast].modename,
791 bond->params.lacp_fast);
794 static ssize_t bonding_store_lacp(struct device *d,
795 struct device_attribute *attr,
796 const char *buf, size_t count)
798 int new_value, ret = count;
799 struct bonding *bond = to_bond(d);
801 if (bond->dev->flags & IFF_UP) {
802 pr_err("%s: Unable to update LACP rate because interface is up.\n",
808 if (bond->params.mode != BOND_MODE_8023AD) {
809 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
815 new_value = bond_parse_parm(buf, bond_lacp_tbl);
817 if ((new_value == 1) || (new_value == 0)) {
818 bond->params.lacp_fast = new_value;
819 bond_3ad_update_lacp_rate(bond);
820 pr_info("%s: Setting LACP rate to %s (%d).\n",
821 bond->dev->name, bond_lacp_tbl[new_value].modename,
824 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
825 bond->dev->name, (int)strlen(buf) - 1, buf);
831 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
832 bonding_show_lacp, bonding_store_lacp);
834 static ssize_t bonding_show_min_links(struct device *d,
835 struct device_attribute *attr,
838 struct bonding *bond = to_bond(d);
840 return sprintf(buf, "%d\n", bond->params.min_links);
843 static ssize_t bonding_store_min_links(struct device *d,
844 struct device_attribute *attr,
845 const char *buf, size_t count)
847 struct bonding *bond = to_bond(d);
849 unsigned int new_value;
851 ret = kstrtouint(buf, 0, &new_value);
853 pr_err("%s: Ignoring invalid min links value %s.\n",
854 bond->dev->name, buf);
858 pr_info("%s: Setting min links value to %u\n",
859 bond->dev->name, new_value);
860 bond->params.min_links = new_value;
863 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
864 bonding_show_min_links, bonding_store_min_links);
866 static ssize_t bonding_show_ad_select(struct device *d,
867 struct device_attribute *attr,
870 struct bonding *bond = to_bond(d);
872 return sprintf(buf, "%s %d\n",
873 ad_select_tbl[bond->params.ad_select].modename,
874 bond->params.ad_select);
878 static ssize_t bonding_store_ad_select(struct device *d,
879 struct device_attribute *attr,
880 const char *buf, size_t count)
882 int new_value, ret = count;
883 struct bonding *bond = to_bond(d);
885 if (bond->dev->flags & IFF_UP) {
886 pr_err("%s: Unable to update ad_select because interface is up.\n",
892 new_value = bond_parse_parm(buf, ad_select_tbl);
894 if (new_value != -1) {
895 bond->params.ad_select = new_value;
896 pr_info("%s: Setting ad_select to %s (%d).\n",
897 bond->dev->name, ad_select_tbl[new_value].modename,
900 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
901 bond->dev->name, (int)strlen(buf) - 1, buf);
907 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
908 bonding_show_ad_select, bonding_store_ad_select);
911 * Show and set the number of peer notifications to send after a failover event.
913 static ssize_t bonding_show_num_peer_notif(struct device *d,
914 struct device_attribute *attr,
917 struct bonding *bond = to_bond(d);
918 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
921 static ssize_t bonding_store_num_peer_notif(struct device *d,
922 struct device_attribute *attr,
923 const char *buf, size_t count)
925 struct bonding *bond = to_bond(d);
926 int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
927 return err ? err : count;
929 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
930 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
931 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
932 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
935 * Show and set the MII monitor interval. There are two tricky bits
936 * here. First, if MII monitoring is activated, then we must disable
937 * ARP monitoring. Second, if the timer isn't running, we must
940 static ssize_t bonding_show_miimon(struct device *d,
941 struct device_attribute *attr,
944 struct bonding *bond = to_bond(d);
946 return sprintf(buf, "%d\n", bond->params.miimon);
949 static ssize_t bonding_store_miimon(struct device *d,
950 struct device_attribute *attr,
951 const char *buf, size_t count)
953 int new_value, ret = count;
954 struct bonding *bond = to_bond(d);
957 return restart_syscall();
958 if (sscanf(buf, "%d", &new_value) != 1) {
959 pr_err("%s: no miimon value specified.\n",
965 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
966 bond->dev->name, new_value, 1, INT_MAX);
970 pr_info("%s: Setting MII monitoring interval to %d.\n",
971 bond->dev->name, new_value);
972 bond->params.miimon = new_value;
973 if (bond->params.updelay)
974 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
976 bond->params.updelay * bond->params.miimon);
977 if (bond->params.downdelay)
978 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
980 bond->params.downdelay * bond->params.miimon);
981 if (bond->params.arp_interval) {
982 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
984 bond->params.arp_interval = 0;
985 if (bond->params.arp_validate) {
986 bond->params.arp_validate =
987 BOND_ARP_VALIDATE_NONE;
991 if (bond->dev->flags & IFF_UP) {
992 /* If the interface is up, we may need to fire off
993 * the MII timer. If the interface is down, the
994 * timer will get fired off when the open function
997 cancel_delayed_work_sync(&bond->arp_work);
998 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1005 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1006 bonding_show_miimon, bonding_store_miimon);
1009 * Show and set the primary slave. The store function is much
1010 * simpler than bonding_store_slaves function because it only needs to
1011 * handle one interface name.
1012 * The bond must be a mode that supports a primary for this be
1015 static ssize_t bonding_show_primary(struct device *d,
1016 struct device_attribute *attr,
1020 struct bonding *bond = to_bond(d);
1022 if (bond->primary_slave)
1023 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1028 static ssize_t bonding_store_primary(struct device *d,
1029 struct device_attribute *attr,
1030 const char *buf, size_t count)
1033 struct slave *slave;
1034 struct bonding *bond = to_bond(d);
1035 char ifname[IFNAMSIZ];
1037 if (!rtnl_trylock())
1038 return restart_syscall();
1040 read_lock(&bond->lock);
1041 write_lock_bh(&bond->curr_slave_lock);
1043 if (!USES_PRIMARY(bond->params.mode)) {
1044 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1045 bond->dev->name, bond->dev->name, bond->params.mode);
1049 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1051 /* check to see if we are clearing primary */
1052 if (!strlen(ifname) || buf[0] == '\n') {
1053 pr_info("%s: Setting primary slave to None.\n",
1055 bond->primary_slave = NULL;
1056 bond_select_active_slave(bond);
1060 bond_for_each_slave(bond, slave, i) {
1061 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1062 pr_info("%s: Setting %s as primary slave.\n",
1063 bond->dev->name, slave->dev->name);
1064 bond->primary_slave = slave;
1065 strcpy(bond->params.primary, slave->dev->name);
1066 bond_select_active_slave(bond);
1071 strncpy(bond->params.primary, ifname, IFNAMSIZ);
1072 bond->params.primary[IFNAMSIZ - 1] = 0;
1074 pr_info("%s: Recording %s as primary, "
1075 "but it has not been enslaved to %s yet.\n",
1076 bond->dev->name, ifname, bond->dev->name);
1078 write_unlock_bh(&bond->curr_slave_lock);
1079 read_unlock(&bond->lock);
1080 unblock_netpoll_tx();
1085 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1086 bonding_show_primary, bonding_store_primary);
1089 * Show and set the primary_reselect flag.
1091 static ssize_t bonding_show_primary_reselect(struct device *d,
1092 struct device_attribute *attr,
1095 struct bonding *bond = to_bond(d);
1097 return sprintf(buf, "%s %d\n",
1098 pri_reselect_tbl[bond->params.primary_reselect].modename,
1099 bond->params.primary_reselect);
1102 static ssize_t bonding_store_primary_reselect(struct device *d,
1103 struct device_attribute *attr,
1104 const char *buf, size_t count)
1106 int new_value, ret = count;
1107 struct bonding *bond = to_bond(d);
1109 if (!rtnl_trylock())
1110 return restart_syscall();
1112 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1113 if (new_value < 0) {
1114 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1116 (int) strlen(buf) - 1, buf);
1121 bond->params.primary_reselect = new_value;
1122 pr_info("%s: setting primary_reselect to %s (%d).\n",
1123 bond->dev->name, pri_reselect_tbl[new_value].modename,
1127 read_lock(&bond->lock);
1128 write_lock_bh(&bond->curr_slave_lock);
1129 bond_select_active_slave(bond);
1130 write_unlock_bh(&bond->curr_slave_lock);
1131 read_unlock(&bond->lock);
1132 unblock_netpoll_tx();
1137 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1138 bonding_show_primary_reselect,
1139 bonding_store_primary_reselect);
1142 * Show and set the use_carrier flag.
1144 static ssize_t bonding_show_carrier(struct device *d,
1145 struct device_attribute *attr,
1148 struct bonding *bond = to_bond(d);
1150 return sprintf(buf, "%d\n", bond->params.use_carrier);
1153 static ssize_t bonding_store_carrier(struct device *d,
1154 struct device_attribute *attr,
1155 const char *buf, size_t count)
1157 int new_value, ret = count;
1158 struct bonding *bond = to_bond(d);
1161 if (sscanf(buf, "%d", &new_value) != 1) {
1162 pr_err("%s: no use_carrier value specified.\n",
1167 if ((new_value == 0) || (new_value == 1)) {
1168 bond->params.use_carrier = new_value;
1169 pr_info("%s: Setting use_carrier to %d.\n",
1170 bond->dev->name, new_value);
1172 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1173 bond->dev->name, new_value);
1178 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1179 bonding_show_carrier, bonding_store_carrier);
1183 * Show and set currently active_slave.
1185 static ssize_t bonding_show_active_slave(struct device *d,
1186 struct device_attribute *attr,
1190 struct bonding *bond = to_bond(d);
1193 read_lock(&bond->curr_slave_lock);
1194 curr = bond->curr_active_slave;
1195 read_unlock(&bond->curr_slave_lock);
1197 if (USES_PRIMARY(bond->params.mode) && curr)
1198 count = sprintf(buf, "%s\n", curr->dev->name);
1202 static ssize_t bonding_store_active_slave(struct device *d,
1203 struct device_attribute *attr,
1204 const char *buf, size_t count)
1207 struct slave *slave;
1208 struct slave *old_active = NULL;
1209 struct slave *new_active = NULL;
1210 struct bonding *bond = to_bond(d);
1211 char ifname[IFNAMSIZ];
1213 if (!rtnl_trylock())
1214 return restart_syscall();
1217 read_lock(&bond->lock);
1218 write_lock_bh(&bond->curr_slave_lock);
1220 if (!USES_PRIMARY(bond->params.mode)) {
1221 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1222 bond->dev->name, bond->dev->name, bond->params.mode);
1226 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1228 /* check to see if we are clearing active */
1229 if (!strlen(ifname) || buf[0] == '\n') {
1230 pr_info("%s: Clearing current active slave.\n",
1232 bond->curr_active_slave = NULL;
1233 bond_select_active_slave(bond);
1237 bond_for_each_slave(bond, slave, i) {
1238 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1239 old_active = bond->curr_active_slave;
1241 if (new_active == old_active) {
1243 pr_info("%s: %s is already the current"
1252 (new_active->link == BOND_LINK_UP) &&
1253 IS_UP(new_active->dev)) {
1254 pr_info("%s: Setting %s as active"
1258 bond_change_active_slave(bond,
1262 pr_info("%s: Could not set %s as"
1263 " active slave; either %s is"
1264 " down or the link is down.\n",
1274 pr_info("%s: Unable to set %.*s as active slave.\n",
1275 bond->dev->name, (int)strlen(buf) - 1, buf);
1277 write_unlock_bh(&bond->curr_slave_lock);
1278 read_unlock(&bond->lock);
1279 unblock_netpoll_tx();
1286 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1287 bonding_show_active_slave, bonding_store_active_slave);
1291 * Show link status of the bond interface.
1293 static ssize_t bonding_show_mii_status(struct device *d,
1294 struct device_attribute *attr,
1298 struct bonding *bond = to_bond(d);
1300 read_lock(&bond->curr_slave_lock);
1301 curr = bond->curr_active_slave;
1302 read_unlock(&bond->curr_slave_lock);
1304 return sprintf(buf, "%s\n", curr ? "up" : "down");
1306 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1310 * Show current 802.3ad aggregator ID.
1312 static ssize_t bonding_show_ad_aggregator(struct device *d,
1313 struct device_attribute *attr,
1317 struct bonding *bond = to_bond(d);
1319 if (bond->params.mode == BOND_MODE_8023AD) {
1320 struct ad_info ad_info;
1321 count = sprintf(buf, "%d\n",
1322 (bond_3ad_get_active_agg_info(bond, &ad_info))
1323 ? 0 : ad_info.aggregator_id);
1328 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1332 * Show number of active 802.3ad ports.
1334 static ssize_t bonding_show_ad_num_ports(struct device *d,
1335 struct device_attribute *attr,
1339 struct bonding *bond = to_bond(d);
1341 if (bond->params.mode == BOND_MODE_8023AD) {
1342 struct ad_info ad_info;
1343 count = sprintf(buf, "%d\n",
1344 (bond_3ad_get_active_agg_info(bond, &ad_info))
1345 ? 0 : ad_info.ports);
1350 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1354 * Show current 802.3ad actor key.
1356 static ssize_t bonding_show_ad_actor_key(struct device *d,
1357 struct device_attribute *attr,
1361 struct bonding *bond = to_bond(d);
1363 if (bond->params.mode == BOND_MODE_8023AD) {
1364 struct ad_info ad_info;
1365 count = sprintf(buf, "%d\n",
1366 (bond_3ad_get_active_agg_info(bond, &ad_info))
1367 ? 0 : ad_info.actor_key);
1372 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1376 * Show current 802.3ad partner key.
1378 static ssize_t bonding_show_ad_partner_key(struct device *d,
1379 struct device_attribute *attr,
1383 struct bonding *bond = to_bond(d);
1385 if (bond->params.mode == BOND_MODE_8023AD) {
1386 struct ad_info ad_info;
1387 count = sprintf(buf, "%d\n",
1388 (bond_3ad_get_active_agg_info(bond, &ad_info))
1389 ? 0 : ad_info.partner_key);
1394 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1398 * Show current 802.3ad partner mac.
1400 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1401 struct device_attribute *attr,
1405 struct bonding *bond = to_bond(d);
1407 if (bond->params.mode == BOND_MODE_8023AD) {
1408 struct ad_info ad_info;
1409 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1410 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1415 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1418 * Show the queue_ids of the slaves in the current bond.
1420 static ssize_t bonding_show_queue_id(struct device *d,
1421 struct device_attribute *attr,
1424 struct slave *slave;
1426 struct bonding *bond = to_bond(d);
1428 if (!rtnl_trylock())
1429 return restart_syscall();
1431 read_lock(&bond->lock);
1432 bond_for_each_slave(bond, slave, i) {
1433 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1434 /* not enough space for another interface_name:queue_id pair */
1435 if ((PAGE_SIZE - res) > 10)
1436 res = PAGE_SIZE - 10;
1437 res += sprintf(buf + res, "++more++ ");
1440 res += sprintf(buf + res, "%s:%d ",
1441 slave->dev->name, slave->queue_id);
1443 read_unlock(&bond->lock);
1445 buf[res-1] = '\n'; /* eat the leftover space */
1451 * Set the queue_ids of the slaves in the current bond. The bond
1452 * interface must be enslaved for this to work.
1454 static ssize_t bonding_store_queue_id(struct device *d,
1455 struct device_attribute *attr,
1456 const char *buffer, size_t count)
1458 struct slave *slave, *update_slave;
1459 struct bonding *bond = to_bond(d);
1463 struct net_device *sdev = NULL;
1465 if (!rtnl_trylock())
1466 return restart_syscall();
1468 /* delim will point to queue id if successful */
1469 delim = strchr(buffer, ':');
1474 * Terminate string that points to device name and bump it
1475 * up one, so we can read the queue id there.
1478 if (sscanf(++delim, "%hd\n", &qid) != 1)
1481 /* Check buffer length, valid ifname and queue id */
1482 if (strlen(buffer) > IFNAMSIZ ||
1483 !dev_valid_name(buffer) ||
1484 qid > bond->dev->real_num_tx_queues)
1487 /* Get the pointer to that interface if it exists */
1488 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1492 read_lock(&bond->lock);
1494 /* Search for thes slave and check for duplicate qids */
1495 update_slave = NULL;
1496 bond_for_each_slave(bond, slave, i) {
1497 if (sdev == slave->dev)
1499 * We don't need to check the matching
1500 * slave for dups, since we're overwriting it
1502 update_slave = slave;
1503 else if (qid && qid == slave->queue_id) {
1504 goto err_no_cmd_unlock;
1509 goto err_no_cmd_unlock;
1511 /* Actually set the qids for the slave */
1512 update_slave->queue_id = qid;
1514 read_unlock(&bond->lock);
1520 read_unlock(&bond->lock);
1522 pr_info("invalid input for queue_id set for %s.\n",
1528 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1529 bonding_store_queue_id);
1533 * Show and set the all_slaves_active flag.
1535 static ssize_t bonding_show_slaves_active(struct device *d,
1536 struct device_attribute *attr,
1539 struct bonding *bond = to_bond(d);
1541 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1544 static ssize_t bonding_store_slaves_active(struct device *d,
1545 struct device_attribute *attr,
1546 const char *buf, size_t count)
1548 int i, new_value, ret = count;
1549 struct bonding *bond = to_bond(d);
1550 struct slave *slave;
1552 if (sscanf(buf, "%d", &new_value) != 1) {
1553 pr_err("%s: no all_slaves_active value specified.\n",
1559 if (new_value == bond->params.all_slaves_active)
1562 if ((new_value == 0) || (new_value == 1)) {
1563 bond->params.all_slaves_active = new_value;
1565 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1566 bond->dev->name, new_value);
1571 read_lock(&bond->lock);
1572 bond_for_each_slave(bond, slave, i) {
1573 if (!bond_is_active_slave(slave)) {
1575 slave->inactive = 0;
1577 slave->inactive = 1;
1580 read_unlock(&bond->lock);
1584 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1585 bonding_show_slaves_active, bonding_store_slaves_active);
1588 * Show and set the number of IGMP membership reports to send on link failure
1590 static ssize_t bonding_show_resend_igmp(struct device *d,
1591 struct device_attribute *attr,
1594 struct bonding *bond = to_bond(d);
1596 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1599 static ssize_t bonding_store_resend_igmp(struct device *d,
1600 struct device_attribute *attr,
1601 const char *buf, size_t count)
1603 int new_value, ret = count;
1604 struct bonding *bond = to_bond(d);
1606 if (sscanf(buf, "%d", &new_value) != 1) {
1607 pr_err("%s: no resend_igmp value specified.\n",
1613 if (new_value < 0 || new_value > 255) {
1614 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1615 bond->dev->name, new_value);
1620 pr_info("%s: Setting resend_igmp to %d.\n",
1621 bond->dev->name, new_value);
1622 bond->params.resend_igmp = new_value;
1627 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1628 bonding_show_resend_igmp, bonding_store_resend_igmp);
1630 static struct attribute *per_bond_attrs[] = {
1631 &dev_attr_slaves.attr,
1632 &dev_attr_mode.attr,
1633 &dev_attr_fail_over_mac.attr,
1634 &dev_attr_arp_validate.attr,
1635 &dev_attr_arp_interval.attr,
1636 &dev_attr_arp_ip_target.attr,
1637 &dev_attr_downdelay.attr,
1638 &dev_attr_updelay.attr,
1639 &dev_attr_lacp_rate.attr,
1640 &dev_attr_ad_select.attr,
1641 &dev_attr_xmit_hash_policy.attr,
1642 &dev_attr_num_grat_arp.attr,
1643 &dev_attr_num_unsol_na.attr,
1644 &dev_attr_miimon.attr,
1645 &dev_attr_primary.attr,
1646 &dev_attr_primary_reselect.attr,
1647 &dev_attr_use_carrier.attr,
1648 &dev_attr_active_slave.attr,
1649 &dev_attr_mii_status.attr,
1650 &dev_attr_ad_aggregator.attr,
1651 &dev_attr_ad_num_ports.attr,
1652 &dev_attr_ad_actor_key.attr,
1653 &dev_attr_ad_partner_key.attr,
1654 &dev_attr_ad_partner_mac.attr,
1655 &dev_attr_queue_id.attr,
1656 &dev_attr_all_slaves_active.attr,
1657 &dev_attr_resend_igmp.attr,
1658 &dev_attr_min_links.attr,
1662 static struct attribute_group bonding_group = {
1664 .attrs = per_bond_attrs,
1668 * Initialize sysfs. This sets up the bonding_masters file in
1671 int bond_create_sysfs(struct bond_net *bn)
1675 bn->class_attr_bonding_masters = class_attr_bonding_masters;
1676 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1678 ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1680 * Permit multiple loads of the module by ignoring failures to
1681 * create the bonding_masters sysfs file. Bonding devices
1682 * created by second or subsequent loads of the module will
1683 * not be listed in, or controllable by, bonding_masters, but
1684 * will have the usual "bonding" sysfs directory.
1686 * This is done to preserve backwards compatibility for
1687 * initscripts/sysconfig, which load bonding multiple times to
1688 * configure multiple bonding devices.
1690 if (ret == -EEXIST) {
1691 /* Is someone being kinky and naming a device bonding_master? */
1692 if (__dev_get_by_name(bn->net,
1693 class_attr_bonding_masters.attr.name))
1694 pr_err("network device named %s already exists in sysfs",
1695 class_attr_bonding_masters.attr.name);
1704 * Remove /sys/class/net/bonding_masters.
1706 void bond_destroy_sysfs(struct bond_net *bn)
1708 netdev_class_remove_file(&bn->class_attr_bonding_masters);
1712 * Initialize sysfs for each bond. This sets up and registers
1713 * the 'bondctl' directory for each individual bond under /sys/class/net.
1715 void bond_prepare_sysfs_group(struct bonding *bond)
1717 bond->dev->sysfs_groups[0] = &bonding_group;