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);
319 if (bond->dev->flags & IFF_UP) {
320 pr_err("unable to update mode of %s because interface is up.\n",
326 if (bond->slave_cnt > 0) {
327 pr_err("unable to update mode of %s because it has slaves.\n",
333 new_value = bond_parse_parm(buf, bond_mode_tbl);
335 pr_err("%s: Ignoring invalid mode value %.*s.\n",
336 bond->dev->name, (int)strlen(buf) - 1, buf);
340 if ((new_value == BOND_MODE_ALB ||
341 new_value == BOND_MODE_TLB) &&
342 bond->params.arp_interval) {
343 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
344 bond->dev->name, bond_mode_tbl[new_value].modename);
349 bond->params.mode = new_value;
350 bond_set_mode_ops(bond, bond->params.mode);
351 pr_info("%s: setting mode to %s (%d).\n",
352 bond->dev->name, bond_mode_tbl[new_value].modename,
357 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
358 bonding_show_mode, bonding_store_mode);
361 * Show and set the bonding transmit hash method.
362 * The bond interface must be down to change the xmit hash policy.
364 static ssize_t bonding_show_xmit_hash(struct device *d,
365 struct device_attribute *attr,
368 struct bonding *bond = to_bond(d);
370 return sprintf(buf, "%s %d\n",
371 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
372 bond->params.xmit_policy);
375 static ssize_t bonding_store_xmit_hash(struct device *d,
376 struct device_attribute *attr,
377 const char *buf, size_t count)
379 int new_value, ret = count;
380 struct bonding *bond = to_bond(d);
382 if (bond->dev->flags & IFF_UP) {
383 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
389 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
391 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
393 (int)strlen(buf) - 1, buf);
397 bond->params.xmit_policy = new_value;
398 bond_set_mode_ops(bond, bond->params.mode);
399 pr_info("%s: setting xmit hash policy to %s (%d).\n",
401 xmit_hashtype_tbl[new_value].modename, new_value);
406 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
407 bonding_show_xmit_hash, bonding_store_xmit_hash);
410 * Show and set arp_validate.
412 static ssize_t bonding_show_arp_validate(struct device *d,
413 struct device_attribute *attr,
416 struct bonding *bond = to_bond(d);
418 return sprintf(buf, "%s %d\n",
419 arp_validate_tbl[bond->params.arp_validate].modename,
420 bond->params.arp_validate);
423 static ssize_t bonding_store_arp_validate(struct device *d,
424 struct device_attribute *attr,
425 const char *buf, size_t count)
428 struct bonding *bond = to_bond(d);
430 new_value = bond_parse_parm(buf, arp_validate_tbl);
432 pr_err("%s: Ignoring invalid arp_validate value %s\n",
433 bond->dev->name, buf);
436 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
437 pr_err("%s: arp_validate only supported in active-backup mode.\n",
441 pr_info("%s: setting arp_validate to %s (%d).\n",
442 bond->dev->name, arp_validate_tbl[new_value].modename,
445 bond->params.arp_validate = new_value;
450 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
451 bonding_store_arp_validate);
454 * Show and store fail_over_mac. User only allowed to change the
455 * value when there are no slaves.
457 static ssize_t bonding_show_fail_over_mac(struct device *d,
458 struct device_attribute *attr,
461 struct bonding *bond = to_bond(d);
463 return sprintf(buf, "%s %d\n",
464 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
465 bond->params.fail_over_mac);
468 static ssize_t bonding_store_fail_over_mac(struct device *d,
469 struct device_attribute *attr,
470 const char *buf, size_t count)
473 struct bonding *bond = to_bond(d);
475 if (bond->slave_cnt != 0) {
476 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
481 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
483 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
484 bond->dev->name, buf);
488 bond->params.fail_over_mac = new_value;
489 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
490 bond->dev->name, fail_over_mac_tbl[new_value].modename,
496 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
497 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
500 * Show and set the arp timer interval. There are two tricky bits
501 * here. First, if ARP monitoring is activated, then we must disable
502 * MII monitoring. Second, if the ARP timer isn't running, we must
505 static ssize_t bonding_show_arp_interval(struct device *d,
506 struct device_attribute *attr,
509 struct bonding *bond = to_bond(d);
511 return sprintf(buf, "%d\n", bond->params.arp_interval);
514 static ssize_t bonding_store_arp_interval(struct device *d,
515 struct device_attribute *attr,
516 const char *buf, size_t count)
518 int new_value, ret = count;
519 struct bonding *bond = to_bond(d);
522 return restart_syscall();
523 if (sscanf(buf, "%d", &new_value) != 1) {
524 pr_err("%s: no arp_interval value specified.\n",
530 pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n",
531 bond->dev->name, new_value, INT_MAX);
535 if (bond->params.mode == BOND_MODE_ALB ||
536 bond->params.mode == BOND_MODE_TLB) {
537 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
538 bond->dev->name, bond->dev->name);
542 pr_info("%s: Setting ARP monitoring interval to %d.\n",
543 bond->dev->name, new_value);
544 bond->params.arp_interval = new_value;
546 if (bond->params.miimon) {
547 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
548 bond->dev->name, bond->dev->name);
549 bond->params.miimon = 0;
551 if (!bond->params.arp_targets[0])
552 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
555 if (bond->dev->flags & IFF_UP) {
556 /* If the interface is up, we may need to fire off
557 * the ARP timer. If the interface is down, the
558 * timer will get fired off when the open function
562 cancel_delayed_work_sync(&bond->arp_work);
564 cancel_delayed_work_sync(&bond->mii_work);
565 queue_delayed_work(bond->wq, &bond->arp_work, 0);
572 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
573 bonding_show_arp_interval, bonding_store_arp_interval);
576 * Show and set the arp targets.
578 static ssize_t bonding_show_arp_targets(struct device *d,
579 struct device_attribute *attr,
583 struct bonding *bond = to_bond(d);
585 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
586 if (bond->params.arp_targets[i])
587 res += sprintf(buf + res, "%pI4 ",
588 &bond->params.arp_targets[i]);
591 buf[res-1] = '\n'; /* eat the leftover space */
595 static ssize_t bonding_store_arp_targets(struct device *d,
596 struct device_attribute *attr,
597 const char *buf, size_t count)
600 int i = 0, done = 0, ret = count;
601 struct bonding *bond = to_bond(d);
604 targets = bond->params.arp_targets;
605 newtarget = in_aton(buf + 1);
608 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
609 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
610 bond->dev->name, &newtarget);
614 /* look for an empty slot to put the target in, and check for dupes */
615 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
616 if (targets[i] == newtarget) { /* duplicate */
617 pr_err("%s: ARP target %pI4 is already present\n",
618 bond->dev->name, &newtarget);
622 if (targets[i] == 0) {
623 pr_info("%s: adding ARP target %pI4.\n",
624 bond->dev->name, &newtarget);
626 targets[i] = newtarget;
630 pr_err("%s: ARP target table is full!\n",
636 } else if (buf[0] == '-') {
637 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
638 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
639 bond->dev->name, &newtarget);
644 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
645 if (targets[i] == newtarget) {
647 pr_info("%s: removing ARP target %pI4.\n",
648 bond->dev->name, &newtarget);
649 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
650 targets[j] = targets[j+1];
657 pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
658 bond->dev->name, &newtarget);
663 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
672 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
675 * Show and set the up and down delays. These must be multiples of the
676 * MII monitoring value, and are stored internally as the multiplier.
677 * Thus, we must translate to MS for the real world.
679 static ssize_t bonding_show_downdelay(struct device *d,
680 struct device_attribute *attr,
683 struct bonding *bond = to_bond(d);
685 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
688 static ssize_t bonding_store_downdelay(struct device *d,
689 struct device_attribute *attr,
690 const char *buf, size_t count)
692 int new_value, ret = count;
693 struct bonding *bond = to_bond(d);
695 if (!(bond->params.miimon)) {
696 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
702 if (sscanf(buf, "%d", &new_value) != 1) {
703 pr_err("%s: no down delay value specified.\n", bond->dev->name);
708 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
709 bond->dev->name, new_value, 0, INT_MAX);
713 if ((new_value % bond->params.miimon) != 0) {
714 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
715 bond->dev->name, new_value,
717 (new_value / bond->params.miimon) *
718 bond->params.miimon);
720 bond->params.downdelay = new_value / bond->params.miimon;
721 pr_info("%s: Setting down delay to %d.\n",
723 bond->params.downdelay * bond->params.miimon);
730 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
731 bonding_show_downdelay, bonding_store_downdelay);
733 static ssize_t bonding_show_updelay(struct device *d,
734 struct device_attribute *attr,
737 struct bonding *bond = to_bond(d);
739 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
743 static ssize_t bonding_store_updelay(struct device *d,
744 struct device_attribute *attr,
745 const char *buf, size_t count)
747 int new_value, ret = count;
748 struct bonding *bond = to_bond(d);
750 if (!(bond->params.miimon)) {
751 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
757 if (sscanf(buf, "%d", &new_value) != 1) {
758 pr_err("%s: no up delay value specified.\n",
764 pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n",
765 bond->dev->name, new_value, 0, INT_MAX);
769 if ((new_value % bond->params.miimon) != 0) {
770 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
771 bond->dev->name, new_value,
773 (new_value / bond->params.miimon) *
774 bond->params.miimon);
776 bond->params.updelay = new_value / bond->params.miimon;
777 pr_info("%s: Setting up delay to %d.\n",
779 bond->params.updelay * bond->params.miimon);
785 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
786 bonding_show_updelay, bonding_store_updelay);
789 * Show and set the LACP interval. Interface must be down, and the mode
790 * must be set to 802.3ad mode.
792 static ssize_t bonding_show_lacp(struct device *d,
793 struct device_attribute *attr,
796 struct bonding *bond = to_bond(d);
798 return sprintf(buf, "%s %d\n",
799 bond_lacp_tbl[bond->params.lacp_fast].modename,
800 bond->params.lacp_fast);
803 static ssize_t bonding_store_lacp(struct device *d,
804 struct device_attribute *attr,
805 const char *buf, size_t count)
807 int new_value, ret = count;
808 struct bonding *bond = to_bond(d);
810 if (bond->dev->flags & IFF_UP) {
811 pr_err("%s: Unable to update LACP rate because interface is up.\n",
817 if (bond->params.mode != BOND_MODE_8023AD) {
818 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
824 new_value = bond_parse_parm(buf, bond_lacp_tbl);
826 if ((new_value == 1) || (new_value == 0)) {
827 bond->params.lacp_fast = new_value;
828 bond_3ad_update_lacp_rate(bond);
829 pr_info("%s: Setting LACP rate to %s (%d).\n",
830 bond->dev->name, bond_lacp_tbl[new_value].modename,
833 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
834 bond->dev->name, (int)strlen(buf) - 1, buf);
840 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
841 bonding_show_lacp, bonding_store_lacp);
843 static ssize_t bonding_show_min_links(struct device *d,
844 struct device_attribute *attr,
847 struct bonding *bond = to_bond(d);
849 return sprintf(buf, "%d\n", bond->params.min_links);
852 static ssize_t bonding_store_min_links(struct device *d,
853 struct device_attribute *attr,
854 const char *buf, size_t count)
856 struct bonding *bond = to_bond(d);
858 unsigned int new_value;
860 ret = kstrtouint(buf, 0, &new_value);
862 pr_err("%s: Ignoring invalid min links value %s.\n",
863 bond->dev->name, buf);
867 pr_info("%s: Setting min links value to %u\n",
868 bond->dev->name, new_value);
869 bond->params.min_links = new_value;
872 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
873 bonding_show_min_links, bonding_store_min_links);
875 static ssize_t bonding_show_ad_select(struct device *d,
876 struct device_attribute *attr,
879 struct bonding *bond = to_bond(d);
881 return sprintf(buf, "%s %d\n",
882 ad_select_tbl[bond->params.ad_select].modename,
883 bond->params.ad_select);
887 static ssize_t bonding_store_ad_select(struct device *d,
888 struct device_attribute *attr,
889 const char *buf, size_t count)
891 int new_value, ret = count;
892 struct bonding *bond = to_bond(d);
894 if (bond->dev->flags & IFF_UP) {
895 pr_err("%s: Unable to update ad_select because interface is up.\n",
901 new_value = bond_parse_parm(buf, ad_select_tbl);
903 if (new_value != -1) {
904 bond->params.ad_select = new_value;
905 pr_info("%s: Setting ad_select to %s (%d).\n",
906 bond->dev->name, ad_select_tbl[new_value].modename,
909 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
910 bond->dev->name, (int)strlen(buf) - 1, buf);
916 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
917 bonding_show_ad_select, bonding_store_ad_select);
920 * Show and set the number of peer notifications to send after a failover event.
922 static ssize_t bonding_show_num_peer_notif(struct device *d,
923 struct device_attribute *attr,
926 struct bonding *bond = to_bond(d);
927 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
930 static ssize_t bonding_store_num_peer_notif(struct device *d,
931 struct device_attribute *attr,
932 const char *buf, size_t count)
934 struct bonding *bond = to_bond(d);
935 int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
936 return err ? err : count;
938 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
939 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
940 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
941 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
944 * Show and set the MII monitor interval. There are two tricky bits
945 * here. First, if MII monitoring is activated, then we must disable
946 * ARP monitoring. Second, if the timer isn't running, we must
949 static ssize_t bonding_show_miimon(struct device *d,
950 struct device_attribute *attr,
953 struct bonding *bond = to_bond(d);
955 return sprintf(buf, "%d\n", bond->params.miimon);
958 static ssize_t bonding_store_miimon(struct device *d,
959 struct device_attribute *attr,
960 const char *buf, size_t count)
962 int new_value, ret = count;
963 struct bonding *bond = to_bond(d);
966 return restart_syscall();
967 if (sscanf(buf, "%d", &new_value) != 1) {
968 pr_err("%s: no miimon value specified.\n",
974 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
975 bond->dev->name, new_value, 0, INT_MAX);
979 pr_info("%s: Setting MII monitoring interval to %d.\n",
980 bond->dev->name, new_value);
981 bond->params.miimon = new_value;
982 if (bond->params.updelay)
983 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
985 bond->params.updelay * bond->params.miimon);
986 if (bond->params.downdelay)
987 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
989 bond->params.downdelay * bond->params.miimon);
990 if (new_value && bond->params.arp_interval) {
991 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
993 bond->params.arp_interval = 0;
994 if (bond->params.arp_validate)
995 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
997 if (bond->dev->flags & IFF_UP) {
998 /* If the interface is up, we may need to fire off
999 * the MII timer. If the interface is down, the
1000 * timer will get fired off when the open function
1004 cancel_delayed_work_sync(&bond->mii_work);
1006 cancel_delayed_work_sync(&bond->arp_work);
1007 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1014 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1015 bonding_show_miimon, bonding_store_miimon);
1018 * Show and set the primary slave. The store function is much
1019 * simpler than bonding_store_slaves function because it only needs to
1020 * handle one interface name.
1021 * The bond must be a mode that supports a primary for this be
1024 static ssize_t bonding_show_primary(struct device *d,
1025 struct device_attribute *attr,
1029 struct bonding *bond = to_bond(d);
1031 if (bond->primary_slave)
1032 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1037 static ssize_t bonding_store_primary(struct device *d,
1038 struct device_attribute *attr,
1039 const char *buf, size_t count)
1042 struct slave *slave;
1043 struct bonding *bond = to_bond(d);
1044 char ifname[IFNAMSIZ];
1046 if (!rtnl_trylock())
1047 return restart_syscall();
1049 read_lock(&bond->lock);
1050 write_lock_bh(&bond->curr_slave_lock);
1052 if (!USES_PRIMARY(bond->params.mode)) {
1053 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1054 bond->dev->name, bond->dev->name, bond->params.mode);
1058 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1060 /* check to see if we are clearing primary */
1061 if (!strlen(ifname) || buf[0] == '\n') {
1062 pr_info("%s: Setting primary slave to None.\n",
1064 bond->primary_slave = NULL;
1065 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1066 bond_select_active_slave(bond);
1070 bond_for_each_slave(bond, slave, i) {
1071 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1072 pr_info("%s: Setting %s as primary slave.\n",
1073 bond->dev->name, slave->dev->name);
1074 bond->primary_slave = slave;
1075 strcpy(bond->params.primary, slave->dev->name);
1076 bond_select_active_slave(bond);
1081 strncpy(bond->params.primary, ifname, IFNAMSIZ);
1082 bond->params.primary[IFNAMSIZ - 1] = 0;
1084 pr_info("%s: Recording %s as primary, "
1085 "but it has not been enslaved to %s yet.\n",
1086 bond->dev->name, ifname, bond->dev->name);
1088 write_unlock_bh(&bond->curr_slave_lock);
1089 read_unlock(&bond->lock);
1090 unblock_netpoll_tx();
1095 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1096 bonding_show_primary, bonding_store_primary);
1099 * Show and set the primary_reselect flag.
1101 static ssize_t bonding_show_primary_reselect(struct device *d,
1102 struct device_attribute *attr,
1105 struct bonding *bond = to_bond(d);
1107 return sprintf(buf, "%s %d\n",
1108 pri_reselect_tbl[bond->params.primary_reselect].modename,
1109 bond->params.primary_reselect);
1112 static ssize_t bonding_store_primary_reselect(struct device *d,
1113 struct device_attribute *attr,
1114 const char *buf, size_t count)
1116 int new_value, ret = count;
1117 struct bonding *bond = to_bond(d);
1119 if (!rtnl_trylock())
1120 return restart_syscall();
1122 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1123 if (new_value < 0) {
1124 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1126 (int) strlen(buf) - 1, buf);
1131 bond->params.primary_reselect = new_value;
1132 pr_info("%s: setting primary_reselect to %s (%d).\n",
1133 bond->dev->name, pri_reselect_tbl[new_value].modename,
1137 read_lock(&bond->lock);
1138 write_lock_bh(&bond->curr_slave_lock);
1139 bond_select_active_slave(bond);
1140 write_unlock_bh(&bond->curr_slave_lock);
1141 read_unlock(&bond->lock);
1142 unblock_netpoll_tx();
1147 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1148 bonding_show_primary_reselect,
1149 bonding_store_primary_reselect);
1152 * Show and set the use_carrier flag.
1154 static ssize_t bonding_show_carrier(struct device *d,
1155 struct device_attribute *attr,
1158 struct bonding *bond = to_bond(d);
1160 return sprintf(buf, "%d\n", bond->params.use_carrier);
1163 static ssize_t bonding_store_carrier(struct device *d,
1164 struct device_attribute *attr,
1165 const char *buf, size_t count)
1167 int new_value, ret = count;
1168 struct bonding *bond = to_bond(d);
1171 if (sscanf(buf, "%d", &new_value) != 1) {
1172 pr_err("%s: no use_carrier value specified.\n",
1177 if ((new_value == 0) || (new_value == 1)) {
1178 bond->params.use_carrier = new_value;
1179 pr_info("%s: Setting use_carrier to %d.\n",
1180 bond->dev->name, new_value);
1182 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1183 bond->dev->name, new_value);
1188 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1189 bonding_show_carrier, bonding_store_carrier);
1193 * Show and set currently active_slave.
1195 static ssize_t bonding_show_active_slave(struct device *d,
1196 struct device_attribute *attr,
1200 struct bonding *bond = to_bond(d);
1203 read_lock(&bond->curr_slave_lock);
1204 curr = bond->curr_active_slave;
1205 read_unlock(&bond->curr_slave_lock);
1207 if (USES_PRIMARY(bond->params.mode) && curr)
1208 count = sprintf(buf, "%s\n", curr->dev->name);
1212 static ssize_t bonding_store_active_slave(struct device *d,
1213 struct device_attribute *attr,
1214 const char *buf, size_t count)
1217 struct slave *slave;
1218 struct slave *old_active = NULL;
1219 struct slave *new_active = NULL;
1220 struct bonding *bond = to_bond(d);
1221 char ifname[IFNAMSIZ];
1223 if (!rtnl_trylock())
1224 return restart_syscall();
1227 read_lock(&bond->lock);
1228 write_lock_bh(&bond->curr_slave_lock);
1230 if (!USES_PRIMARY(bond->params.mode)) {
1231 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1232 bond->dev->name, bond->dev->name, bond->params.mode);
1236 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1238 /* check to see if we are clearing active */
1239 if (!strlen(ifname) || buf[0] == '\n') {
1240 pr_info("%s: Clearing current active slave.\n",
1242 bond->curr_active_slave = NULL;
1243 bond_select_active_slave(bond);
1247 bond_for_each_slave(bond, slave, i) {
1248 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1249 old_active = bond->curr_active_slave;
1251 if (new_active == old_active) {
1253 pr_info("%s: %s is already the current"
1262 (new_active->link == BOND_LINK_UP) &&
1263 IS_UP(new_active->dev)) {
1264 pr_info("%s: Setting %s as active"
1268 bond_change_active_slave(bond,
1272 pr_info("%s: Could not set %s as"
1273 " active slave; either %s is"
1274 " down or the link is down.\n",
1284 pr_info("%s: Unable to set %.*s as active slave.\n",
1285 bond->dev->name, (int)strlen(buf) - 1, buf);
1287 write_unlock_bh(&bond->curr_slave_lock);
1288 read_unlock(&bond->lock);
1289 unblock_netpoll_tx();
1296 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1297 bonding_show_active_slave, bonding_store_active_slave);
1301 * Show link status of the bond interface.
1303 static ssize_t bonding_show_mii_status(struct device *d,
1304 struct device_attribute *attr,
1308 struct bonding *bond = to_bond(d);
1310 read_lock(&bond->curr_slave_lock);
1311 curr = bond->curr_active_slave;
1312 read_unlock(&bond->curr_slave_lock);
1314 return sprintf(buf, "%s\n", curr ? "up" : "down");
1316 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1320 * Show current 802.3ad aggregator ID.
1322 static ssize_t bonding_show_ad_aggregator(struct device *d,
1323 struct device_attribute *attr,
1327 struct bonding *bond = to_bond(d);
1329 if (bond->params.mode == BOND_MODE_8023AD) {
1330 struct ad_info ad_info;
1331 count = sprintf(buf, "%d\n",
1332 (bond_3ad_get_active_agg_info(bond, &ad_info))
1333 ? 0 : ad_info.aggregator_id);
1338 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1342 * Show number of active 802.3ad ports.
1344 static ssize_t bonding_show_ad_num_ports(struct device *d,
1345 struct device_attribute *attr,
1349 struct bonding *bond = to_bond(d);
1351 if (bond->params.mode == BOND_MODE_8023AD) {
1352 struct ad_info ad_info;
1353 count = sprintf(buf, "%d\n",
1354 (bond_3ad_get_active_agg_info(bond, &ad_info))
1355 ? 0 : ad_info.ports);
1360 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1364 * Show current 802.3ad actor key.
1366 static ssize_t bonding_show_ad_actor_key(struct device *d,
1367 struct device_attribute *attr,
1371 struct bonding *bond = to_bond(d);
1373 if (bond->params.mode == BOND_MODE_8023AD) {
1374 struct ad_info ad_info;
1375 count = sprintf(buf, "%d\n",
1376 (bond_3ad_get_active_agg_info(bond, &ad_info))
1377 ? 0 : ad_info.actor_key);
1382 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1386 * Show current 802.3ad partner key.
1388 static ssize_t bonding_show_ad_partner_key(struct device *d,
1389 struct device_attribute *attr,
1393 struct bonding *bond = to_bond(d);
1395 if (bond->params.mode == BOND_MODE_8023AD) {
1396 struct ad_info ad_info;
1397 count = sprintf(buf, "%d\n",
1398 (bond_3ad_get_active_agg_info(bond, &ad_info))
1399 ? 0 : ad_info.partner_key);
1404 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1408 * Show current 802.3ad partner mac.
1410 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1411 struct device_attribute *attr,
1415 struct bonding *bond = to_bond(d);
1417 if (bond->params.mode == BOND_MODE_8023AD) {
1418 struct ad_info ad_info;
1419 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1420 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1425 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1428 * Show the queue_ids of the slaves in the current bond.
1430 static ssize_t bonding_show_queue_id(struct device *d,
1431 struct device_attribute *attr,
1434 struct slave *slave;
1436 struct bonding *bond = to_bond(d);
1438 if (!rtnl_trylock())
1439 return restart_syscall();
1441 read_lock(&bond->lock);
1442 bond_for_each_slave(bond, slave, i) {
1443 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1444 /* not enough space for another interface_name:queue_id pair */
1445 if ((PAGE_SIZE - res) > 10)
1446 res = PAGE_SIZE - 10;
1447 res += sprintf(buf + res, "++more++ ");
1450 res += sprintf(buf + res, "%s:%d ",
1451 slave->dev->name, slave->queue_id);
1453 read_unlock(&bond->lock);
1455 buf[res-1] = '\n'; /* eat the leftover space */
1461 * Set the queue_ids of the slaves in the current bond. The bond
1462 * interface must be enslaved for this to work.
1464 static ssize_t bonding_store_queue_id(struct device *d,
1465 struct device_attribute *attr,
1466 const char *buffer, size_t count)
1468 struct slave *slave, *update_slave;
1469 struct bonding *bond = to_bond(d);
1473 struct net_device *sdev = NULL;
1475 if (!rtnl_trylock())
1476 return restart_syscall();
1478 /* delim will point to queue id if successful */
1479 delim = strchr(buffer, ':');
1484 * Terminate string that points to device name and bump it
1485 * up one, so we can read the queue id there.
1488 if (sscanf(++delim, "%hd\n", &qid) != 1)
1491 /* Check buffer length, valid ifname and queue id */
1492 if (strlen(buffer) > IFNAMSIZ ||
1493 !dev_valid_name(buffer) ||
1494 qid > bond->dev->real_num_tx_queues)
1497 /* Get the pointer to that interface if it exists */
1498 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1502 read_lock(&bond->lock);
1504 /* Search for thes slave and check for duplicate qids */
1505 update_slave = NULL;
1506 bond_for_each_slave(bond, slave, i) {
1507 if (sdev == slave->dev)
1509 * We don't need to check the matching
1510 * slave for dups, since we're overwriting it
1512 update_slave = slave;
1513 else if (qid && qid == slave->queue_id) {
1514 goto err_no_cmd_unlock;
1519 goto err_no_cmd_unlock;
1521 /* Actually set the qids for the slave */
1522 update_slave->queue_id = qid;
1524 read_unlock(&bond->lock);
1530 read_unlock(&bond->lock);
1532 pr_info("invalid input for queue_id set for %s.\n",
1538 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1539 bonding_store_queue_id);
1543 * Show and set the all_slaves_active flag.
1545 static ssize_t bonding_show_slaves_active(struct device *d,
1546 struct device_attribute *attr,
1549 struct bonding *bond = to_bond(d);
1551 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1554 static ssize_t bonding_store_slaves_active(struct device *d,
1555 struct device_attribute *attr,
1556 const char *buf, size_t count)
1558 int i, new_value, ret = count;
1559 struct bonding *bond = to_bond(d);
1560 struct slave *slave;
1562 if (sscanf(buf, "%d", &new_value) != 1) {
1563 pr_err("%s: no all_slaves_active value specified.\n",
1569 if (new_value == bond->params.all_slaves_active)
1572 if ((new_value == 0) || (new_value == 1)) {
1573 bond->params.all_slaves_active = new_value;
1575 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1576 bond->dev->name, new_value);
1581 read_lock(&bond->lock);
1582 bond_for_each_slave(bond, slave, i) {
1583 if (!bond_is_active_slave(slave)) {
1585 slave->inactive = 0;
1587 slave->inactive = 1;
1590 read_unlock(&bond->lock);
1594 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1595 bonding_show_slaves_active, bonding_store_slaves_active);
1598 * Show and set the number of IGMP membership reports to send on link failure
1600 static ssize_t bonding_show_resend_igmp(struct device *d,
1601 struct device_attribute *attr,
1604 struct bonding *bond = to_bond(d);
1606 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1609 static ssize_t bonding_store_resend_igmp(struct device *d,
1610 struct device_attribute *attr,
1611 const char *buf, size_t count)
1613 int new_value, ret = count;
1614 struct bonding *bond = to_bond(d);
1616 if (sscanf(buf, "%d", &new_value) != 1) {
1617 pr_err("%s: no resend_igmp value specified.\n",
1623 if (new_value < 0 || new_value > 255) {
1624 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1625 bond->dev->name, new_value);
1630 pr_info("%s: Setting resend_igmp to %d.\n",
1631 bond->dev->name, new_value);
1632 bond->params.resend_igmp = new_value;
1637 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1638 bonding_show_resend_igmp, bonding_store_resend_igmp);
1640 static struct attribute *per_bond_attrs[] = {
1641 &dev_attr_slaves.attr,
1642 &dev_attr_mode.attr,
1643 &dev_attr_fail_over_mac.attr,
1644 &dev_attr_arp_validate.attr,
1645 &dev_attr_arp_interval.attr,
1646 &dev_attr_arp_ip_target.attr,
1647 &dev_attr_downdelay.attr,
1648 &dev_attr_updelay.attr,
1649 &dev_attr_lacp_rate.attr,
1650 &dev_attr_ad_select.attr,
1651 &dev_attr_xmit_hash_policy.attr,
1652 &dev_attr_num_grat_arp.attr,
1653 &dev_attr_num_unsol_na.attr,
1654 &dev_attr_miimon.attr,
1655 &dev_attr_primary.attr,
1656 &dev_attr_primary_reselect.attr,
1657 &dev_attr_use_carrier.attr,
1658 &dev_attr_active_slave.attr,
1659 &dev_attr_mii_status.attr,
1660 &dev_attr_ad_aggregator.attr,
1661 &dev_attr_ad_num_ports.attr,
1662 &dev_attr_ad_actor_key.attr,
1663 &dev_attr_ad_partner_key.attr,
1664 &dev_attr_ad_partner_mac.attr,
1665 &dev_attr_queue_id.attr,
1666 &dev_attr_all_slaves_active.attr,
1667 &dev_attr_resend_igmp.attr,
1668 &dev_attr_min_links.attr,
1672 static struct attribute_group bonding_group = {
1674 .attrs = per_bond_attrs,
1678 * Initialize sysfs. This sets up the bonding_masters file in
1681 int bond_create_sysfs(struct bond_net *bn)
1685 bn->class_attr_bonding_masters = class_attr_bonding_masters;
1686 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1688 ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1690 * Permit multiple loads of the module by ignoring failures to
1691 * create the bonding_masters sysfs file. Bonding devices
1692 * created by second or subsequent loads of the module will
1693 * not be listed in, or controllable by, bonding_masters, but
1694 * will have the usual "bonding" sysfs directory.
1696 * This is done to preserve backwards compatibility for
1697 * initscripts/sysconfig, which load bonding multiple times to
1698 * configure multiple bonding devices.
1700 if (ret == -EEXIST) {
1701 /* Is someone being kinky and naming a device bonding_master? */
1702 if (__dev_get_by_name(bn->net,
1703 class_attr_bonding_masters.attr.name))
1704 pr_err("network device named %s already exists in sysfs",
1705 class_attr_bonding_masters.attr.name);
1714 * Remove /sys/class/net/bonding_masters.
1716 void bond_destroy_sysfs(struct bond_net *bn)
1718 netdev_class_remove_file(&bn->class_attr_bonding_masters);
1722 * Initialize sysfs for each bond. This sets up and registers
1723 * the 'bondctl' directory for each individual bond under /sys/class/net.
1725 void bond_prepare_sysfs_group(struct bonding *bond)
1727 bond->dev->sysfs_groups[0] = &bonding_group;