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>
29 #include <linux/sysdev.h>
31 #include <linux/types.h>
32 #include <linux/string.h>
33 #include <linux/netdevice.h>
34 #include <linux/inetdevice.h>
36 #include <linux/sysfs.h>
37 #include <linux/ctype.h>
38 #include <linux/inet.h>
39 #include <linux/rtnetlink.h>
40 #include <linux/etherdevice.h>
41 #include <net/net_namespace.h>
42 #include <net/netns/generic.h>
43 #include <linux/nsproxy.h>
47 #define to_dev(obj) container_of(obj, struct device, kobj)
48 #define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
51 * "show" function for the bond_masters attribute.
52 * The class parameter is ignored.
54 static ssize_t bonding_show_bonds(struct class *cls,
55 struct class_attribute *attr,
59 container_of(attr, struct bond_net, class_attr_bonding_masters);
65 list_for_each_entry(bond, &bn->dev_list, bond_list) {
66 if (res > (PAGE_SIZE - IFNAMSIZ)) {
67 /* not enough space for another interface name */
68 if ((PAGE_SIZE - res) > 10)
70 res += sprintf(buf + res, "++more++ ");
73 res += sprintf(buf + res, "%s ", bond->dev->name);
76 buf[res-1] = '\n'; /* eat the leftover space */
82 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
86 list_for_each_entry(bond, &bn->dev_list, bond_list) {
87 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
94 * "store" function for the bond_masters attribute. This is what
95 * creates and deletes entire bonds.
97 * The class parameter is ignored.
101 static ssize_t bonding_store_bonds(struct class *cls,
102 struct class_attribute *attr,
103 const char *buffer, size_t count)
105 struct bond_net *bn =
106 container_of(attr, struct bond_net, class_attr_bonding_masters);
107 char command[IFNAMSIZ + 1] = {0, };
111 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
112 ifname = command + 1;
113 if ((strlen(command) <= 1) ||
114 !dev_valid_name(ifname))
117 if (command[0] == '+') {
118 pr_info("%s is being created...\n", ifname);
119 rv = bond_create(bn->net, ifname);
122 pr_info("%s already exists.\n", ifname);
124 pr_info("%s creation failed.\n", ifname);
127 } else if (command[0] == '-') {
128 struct net_device *bond_dev;
131 bond_dev = bond_get_by_name(bn, ifname);
133 pr_info("%s is being deleted...\n", ifname);
134 unregister_netdevice(bond_dev);
136 pr_err("unable to delete non-existent %s\n", ifname);
143 /* Always return either count or an error. If you return 0, you'll
144 * get called forever, which is bad.
149 pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
153 static const void *bonding_namespace(struct class *cls,
154 const struct class_attribute *attr)
156 const struct bond_net *bn =
157 container_of(attr, struct bond_net, class_attr_bonding_masters);
161 /* class attribute for bond_masters file. This ends up in /sys/class/net */
162 static const struct class_attribute class_attr_bonding_masters = {
164 .name = "bonding_masters",
165 .mode = S_IWUSR | S_IRUGO,
167 .show = bonding_show_bonds,
168 .store = bonding_store_bonds,
169 .namespace = bonding_namespace,
172 int bond_create_slave_symlinks(struct net_device *master,
173 struct net_device *slave)
175 char linkname[IFNAMSIZ+7];
178 /* first, create a link from the slave back to the master */
179 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
183 /* next, create a link from the master to the slave */
184 sprintf(linkname, "slave_%s", slave->name);
185 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
191 void bond_destroy_slave_symlinks(struct net_device *master,
192 struct net_device *slave)
194 char linkname[IFNAMSIZ+7];
196 sysfs_remove_link(&(slave->dev.kobj), "master");
197 sprintf(linkname, "slave_%s", slave->name);
198 sysfs_remove_link(&(master->dev.kobj), linkname);
203 * Show the slaves in the current bond.
205 static ssize_t bonding_show_slaves(struct device *d,
206 struct device_attribute *attr, char *buf)
210 struct bonding *bond = to_bond(d);
212 read_lock(&bond->lock);
213 bond_for_each_slave(bond, slave, i) {
214 if (res > (PAGE_SIZE - IFNAMSIZ)) {
215 /* not enough space for another interface name */
216 if ((PAGE_SIZE - res) > 10)
217 res = PAGE_SIZE - 10;
218 res += sprintf(buf + res, "++more++ ");
221 res += sprintf(buf + res, "%s ", slave->dev->name);
223 read_unlock(&bond->lock);
225 buf[res-1] = '\n'; /* eat the leftover space */
230 * Set the slaves in the current bond. The bond interface must be
231 * up for this to succeed.
232 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
233 * All hard work should be done there.
235 static ssize_t bonding_store_slaves(struct device *d,
236 struct device_attribute *attr,
237 const char *buffer, size_t count)
239 char command[IFNAMSIZ + 1] = { 0, };
241 int res, ret = count;
242 struct net_device *dev;
243 struct bonding *bond = to_bond(d);
246 return restart_syscall();
248 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
249 ifname = command + 1;
250 if ((strlen(command) <= 1) ||
251 !dev_valid_name(ifname))
254 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
256 pr_info("%s: Interface %s does not exist!\n",
257 bond->dev->name, ifname);
262 switch (command[0]) {
264 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
265 res = bond_enslave(bond->dev, dev);
269 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
270 res = bond_release(bond->dev, dev);
282 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
291 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
292 bonding_store_slaves);
295 * Show and set the bonding mode. The bond interface must be down to
298 static ssize_t bonding_show_mode(struct device *d,
299 struct device_attribute *attr, char *buf)
301 struct bonding *bond = to_bond(d);
303 return sprintf(buf, "%s %d\n",
304 bond_mode_tbl[bond->params.mode].modename,
308 static ssize_t bonding_store_mode(struct device *d,
309 struct device_attribute *attr,
310 const char *buf, size_t count)
312 int new_value, ret = count;
313 struct bonding *bond = to_bond(d);
315 if (bond->dev->flags & IFF_UP) {
316 pr_err("unable to update mode of %s because interface is up.\n",
322 if (bond->slave_cnt > 0) {
323 pr_err("unable to update mode of %s because it has slaves.\n",
329 new_value = bond_parse_parm(buf, bond_mode_tbl);
331 pr_err("%s: Ignoring invalid mode value %.*s.\n",
332 bond->dev->name, (int)strlen(buf) - 1, buf);
336 if ((new_value == BOND_MODE_ALB ||
337 new_value == BOND_MODE_TLB) &&
338 bond->params.arp_interval) {
339 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
340 bond->dev->name, bond_mode_tbl[new_value].modename);
345 bond->params.mode = new_value;
346 bond_set_mode_ops(bond, bond->params.mode);
347 pr_info("%s: setting mode to %s (%d).\n",
348 bond->dev->name, bond_mode_tbl[new_value].modename,
353 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
354 bonding_show_mode, bonding_store_mode);
357 * Show and set the bonding transmit hash method.
358 * The bond interface must be down to change the xmit hash policy.
360 static ssize_t bonding_show_xmit_hash(struct device *d,
361 struct device_attribute *attr,
364 struct bonding *bond = to_bond(d);
366 return sprintf(buf, "%s %d\n",
367 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
368 bond->params.xmit_policy);
371 static ssize_t bonding_store_xmit_hash(struct device *d,
372 struct device_attribute *attr,
373 const char *buf, size_t count)
375 int new_value, ret = count;
376 struct bonding *bond = to_bond(d);
378 if (bond->dev->flags & IFF_UP) {
379 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
385 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
387 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
389 (int)strlen(buf) - 1, buf);
393 bond->params.xmit_policy = new_value;
394 bond_set_mode_ops(bond, bond->params.mode);
395 pr_info("%s: setting xmit hash policy to %s (%d).\n",
397 xmit_hashtype_tbl[new_value].modename, new_value);
402 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
403 bonding_show_xmit_hash, bonding_store_xmit_hash);
406 * Show and set arp_validate.
408 static ssize_t bonding_show_arp_validate(struct device *d,
409 struct device_attribute *attr,
412 struct bonding *bond = to_bond(d);
414 return sprintf(buf, "%s %d\n",
415 arp_validate_tbl[bond->params.arp_validate].modename,
416 bond->params.arp_validate);
419 static ssize_t bonding_store_arp_validate(struct device *d,
420 struct device_attribute *attr,
421 const char *buf, size_t count)
424 struct bonding *bond = to_bond(d);
426 new_value = bond_parse_parm(buf, arp_validate_tbl);
428 pr_err("%s: Ignoring invalid arp_validate value %s\n",
429 bond->dev->name, buf);
432 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
433 pr_err("%s: arp_validate only supported in active-backup mode.\n",
437 pr_info("%s: setting arp_validate to %s (%d).\n",
438 bond->dev->name, arp_validate_tbl[new_value].modename,
441 bond->params.arp_validate = new_value;
446 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
447 bonding_store_arp_validate);
450 * Show and store fail_over_mac. User only allowed to change the
451 * value when there are no slaves.
453 static ssize_t bonding_show_fail_over_mac(struct device *d,
454 struct device_attribute *attr,
457 struct bonding *bond = to_bond(d);
459 return sprintf(buf, "%s %d\n",
460 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
461 bond->params.fail_over_mac);
464 static ssize_t bonding_store_fail_over_mac(struct device *d,
465 struct device_attribute *attr,
466 const char *buf, size_t count)
469 struct bonding *bond = to_bond(d);
471 if (bond->slave_cnt != 0) {
472 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
477 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
479 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
480 bond->dev->name, buf);
484 bond->params.fail_over_mac = new_value;
485 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
486 bond->dev->name, fail_over_mac_tbl[new_value].modename,
492 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
493 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
496 * Show and set the arp timer interval. There are two tricky bits
497 * here. First, if ARP monitoring is activated, then we must disable
498 * MII monitoring. Second, if the ARP timer isn't running, we must
501 static ssize_t bonding_show_arp_interval(struct device *d,
502 struct device_attribute *attr,
505 struct bonding *bond = to_bond(d);
507 return sprintf(buf, "%d\n", bond->params.arp_interval);
510 static ssize_t bonding_store_arp_interval(struct device *d,
511 struct device_attribute *attr,
512 const char *buf, size_t count)
514 int new_value, ret = count;
515 struct bonding *bond = to_bond(d);
517 if (sscanf(buf, "%d", &new_value) != 1) {
518 pr_err("%s: no arp_interval value specified.\n",
524 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
525 bond->dev->name, new_value, INT_MAX);
529 if (bond->params.mode == BOND_MODE_ALB ||
530 bond->params.mode == BOND_MODE_TLB) {
531 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
532 bond->dev->name, bond->dev->name);
536 pr_info("%s: Setting ARP monitoring interval to %d.\n",
537 bond->dev->name, new_value);
538 bond->params.arp_interval = new_value;
539 if (bond->params.miimon) {
540 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
541 bond->dev->name, bond->dev->name);
542 bond->params.miimon = 0;
543 if (delayed_work_pending(&bond->mii_work)) {
544 cancel_delayed_work(&bond->mii_work);
545 flush_workqueue(bond->wq);
548 if (!bond->params.arp_targets[0]) {
549 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
552 if (bond->dev->flags & IFF_UP) {
553 /* If the interface is up, we may need to fire off
554 * the ARP timer. If the interface is down, the
555 * timer will get fired off when the open function
558 if (!delayed_work_pending(&bond->arp_work)) {
559 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
560 INIT_DELAYED_WORK(&bond->arp_work,
561 bond_activebackup_arp_mon);
563 INIT_DELAYED_WORK(&bond->arp_work,
564 bond_loadbalance_arp_mon);
566 queue_delayed_work(bond->wq, &bond->arp_work, 0);
573 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
574 bonding_show_arp_interval, bonding_store_arp_interval);
577 * Show and set the arp targets.
579 static ssize_t bonding_show_arp_targets(struct device *d,
580 struct device_attribute *attr,
584 struct bonding *bond = to_bond(d);
586 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
587 if (bond->params.arp_targets[i])
588 res += sprintf(buf + res, "%pI4 ",
589 &bond->params.arp_targets[i]);
592 buf[res-1] = '\n'; /* eat the leftover space */
596 static ssize_t bonding_store_arp_targets(struct device *d,
597 struct device_attribute *attr,
598 const char *buf, size_t count)
601 int i = 0, done = 0, ret = count;
602 struct bonding *bond = to_bond(d);
605 targets = bond->params.arp_targets;
606 newtarget = in_aton(buf + 1);
609 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
610 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
611 bond->dev->name, &newtarget);
615 /* look for an empty slot to put the target in, and check for dupes */
616 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
617 if (targets[i] == newtarget) { /* duplicate */
618 pr_err("%s: ARP target %pI4 is already present\n",
619 bond->dev->name, &newtarget);
623 if (targets[i] == 0) {
624 pr_info("%s: adding ARP target %pI4.\n",
625 bond->dev->name, &newtarget);
627 targets[i] = newtarget;
631 pr_err("%s: ARP target table is full!\n",
637 } else if (buf[0] == '-') {
638 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
639 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
640 bond->dev->name, &newtarget);
645 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
646 if (targets[i] == newtarget) {
648 pr_info("%s: removing ARP target %pI4.\n",
649 bond->dev->name, &newtarget);
650 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
651 targets[j] = targets[j+1];
658 pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
659 bond->dev->name, &newtarget);
664 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
673 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
676 * Show and set the up and down delays. These must be multiples of the
677 * MII monitoring value, and are stored internally as the multiplier.
678 * Thus, we must translate to MS for the real world.
680 static ssize_t bonding_show_downdelay(struct device *d,
681 struct device_attribute *attr,
684 struct bonding *bond = to_bond(d);
686 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
689 static ssize_t bonding_store_downdelay(struct device *d,
690 struct device_attribute *attr,
691 const char *buf, size_t count)
693 int new_value, ret = count;
694 struct bonding *bond = to_bond(d);
696 if (!(bond->params.miimon)) {
697 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
703 if (sscanf(buf, "%d", &new_value) != 1) {
704 pr_err("%s: no down delay value specified.\n", bond->dev->name);
709 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
710 bond->dev->name, new_value, 1, INT_MAX);
714 if ((new_value % bond->params.miimon) != 0) {
715 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
716 bond->dev->name, new_value,
718 (new_value / bond->params.miimon) *
719 bond->params.miimon);
721 bond->params.downdelay = new_value / bond->params.miimon;
722 pr_info("%s: Setting down delay to %d.\n",
724 bond->params.downdelay * bond->params.miimon);
731 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
732 bonding_show_downdelay, bonding_store_downdelay);
734 static ssize_t bonding_show_updelay(struct device *d,
735 struct device_attribute *attr,
738 struct bonding *bond = to_bond(d);
740 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
744 static ssize_t bonding_store_updelay(struct device *d,
745 struct device_attribute *attr,
746 const char *buf, size_t count)
748 int new_value, ret = count;
749 struct bonding *bond = to_bond(d);
751 if (!(bond->params.miimon)) {
752 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
758 if (sscanf(buf, "%d", &new_value) != 1) {
759 pr_err("%s: no up delay value specified.\n",
765 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
766 bond->dev->name, new_value, 1, INT_MAX);
770 if ((new_value % bond->params.miimon) != 0) {
771 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
772 bond->dev->name, new_value,
774 (new_value / bond->params.miimon) *
775 bond->params.miimon);
777 bond->params.updelay = new_value / bond->params.miimon;
778 pr_info("%s: Setting up delay to %d.\n",
780 bond->params.updelay * bond->params.miimon);
786 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
787 bonding_show_updelay, bonding_store_updelay);
790 * Show and set the LACP interval. Interface must be down, and the mode
791 * must be set to 802.3ad mode.
793 static ssize_t bonding_show_lacp(struct device *d,
794 struct device_attribute *attr,
797 struct bonding *bond = to_bond(d);
799 return sprintf(buf, "%s %d\n",
800 bond_lacp_tbl[bond->params.lacp_fast].modename,
801 bond->params.lacp_fast);
804 static ssize_t bonding_store_lacp(struct device *d,
805 struct device_attribute *attr,
806 const char *buf, size_t count)
808 int new_value, ret = count;
809 struct bonding *bond = to_bond(d);
811 if (bond->dev->flags & IFF_UP) {
812 pr_err("%s: Unable to update LACP rate because interface is up.\n",
818 if (bond->params.mode != BOND_MODE_8023AD) {
819 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
825 new_value = bond_parse_parm(buf, bond_lacp_tbl);
827 if ((new_value == 1) || (new_value == 0)) {
828 bond->params.lacp_fast = new_value;
829 bond_3ad_update_lacp_rate(bond);
830 pr_info("%s: Setting LACP rate to %s (%d).\n",
831 bond->dev->name, bond_lacp_tbl[new_value].modename,
834 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
835 bond->dev->name, (int)strlen(buf) - 1, buf);
841 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
842 bonding_show_lacp, bonding_store_lacp);
844 static ssize_t bonding_show_min_links(struct device *d,
845 struct device_attribute *attr,
848 struct bonding *bond = to_bond(d);
850 return sprintf(buf, "%d\n", bond->params.min_links);
853 static ssize_t bonding_store_min_links(struct device *d,
854 struct device_attribute *attr,
855 const char *buf, size_t count)
857 struct bonding *bond = to_bond(d);
859 unsigned int new_value;
861 ret = kstrtouint(buf, 0, &new_value);
863 pr_err("%s: Ignoring invalid min links value %s.\n",
864 bond->dev->name, buf);
868 pr_info("%s: Setting min links value to %u\n",
869 bond->dev->name, new_value);
870 bond->params.min_links = new_value;
873 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
874 bonding_show_min_links, bonding_store_min_links);
876 static ssize_t bonding_show_ad_select(struct device *d,
877 struct device_attribute *attr,
880 struct bonding *bond = to_bond(d);
882 return sprintf(buf, "%s %d\n",
883 ad_select_tbl[bond->params.ad_select].modename,
884 bond->params.ad_select);
888 static ssize_t bonding_store_ad_select(struct device *d,
889 struct device_attribute *attr,
890 const char *buf, size_t count)
892 int new_value, ret = count;
893 struct bonding *bond = to_bond(d);
895 if (bond->dev->flags & IFF_UP) {
896 pr_err("%s: Unable to update ad_select because interface is up.\n",
902 new_value = bond_parse_parm(buf, ad_select_tbl);
904 if (new_value != -1) {
905 bond->params.ad_select = new_value;
906 pr_info("%s: Setting ad_select to %s (%d).\n",
907 bond->dev->name, ad_select_tbl[new_value].modename,
910 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
911 bond->dev->name, (int)strlen(buf) - 1, buf);
917 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
918 bonding_show_ad_select, bonding_store_ad_select);
921 * Show and set the number of peer notifications to send after a failover event.
923 static ssize_t bonding_show_num_peer_notif(struct device *d,
924 struct device_attribute *attr,
927 struct bonding *bond = to_bond(d);
928 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
931 static ssize_t bonding_store_num_peer_notif(struct device *d,
932 struct device_attribute *attr,
933 const char *buf, size_t count)
935 struct bonding *bond = to_bond(d);
936 int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
937 return err ? err : count;
939 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
940 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
941 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
942 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
945 * Show and set the MII monitor interval. There are two tricky bits
946 * here. First, if MII monitoring is activated, then we must disable
947 * ARP monitoring. Second, if the timer isn't running, we must
950 static ssize_t bonding_show_miimon(struct device *d,
951 struct device_attribute *attr,
954 struct bonding *bond = to_bond(d);
956 return sprintf(buf, "%d\n", bond->params.miimon);
959 static ssize_t bonding_store_miimon(struct device *d,
960 struct device_attribute *attr,
961 const char *buf, size_t count)
963 int new_value, ret = count;
964 struct bonding *bond = to_bond(d);
966 if (sscanf(buf, "%d", &new_value) != 1) {
967 pr_err("%s: no miimon value specified.\n",
973 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
974 bond->dev->name, new_value, 1, INT_MAX);
978 pr_info("%s: Setting MII monitoring interval to %d.\n",
979 bond->dev->name, new_value);
980 bond->params.miimon = new_value;
981 if (bond->params.updelay)
982 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
984 bond->params.updelay * bond->params.miimon);
985 if (bond->params.downdelay)
986 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
988 bond->params.downdelay * bond->params.miimon);
989 if (bond->params.arp_interval) {
990 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
992 bond->params.arp_interval = 0;
993 if (bond->params.arp_validate) {
994 bond->params.arp_validate =
995 BOND_ARP_VALIDATE_NONE;
997 if (delayed_work_pending(&bond->arp_work)) {
998 cancel_delayed_work(&bond->arp_work);
999 flush_workqueue(bond->wq);
1003 if (bond->dev->flags & IFF_UP) {
1004 /* If the interface is up, we may need to fire off
1005 * the MII timer. If the interface is down, the
1006 * timer will get fired off when the open function
1009 if (!delayed_work_pending(&bond->mii_work)) {
1010 INIT_DELAYED_WORK(&bond->mii_work,
1012 queue_delayed_work(bond->wq,
1013 &bond->mii_work, 0);
1020 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1021 bonding_show_miimon, bonding_store_miimon);
1024 * Show and set the primary slave. The store function is much
1025 * simpler than bonding_store_slaves function because it only needs to
1026 * handle one interface name.
1027 * The bond must be a mode that supports a primary for this be
1030 static ssize_t bonding_show_primary(struct device *d,
1031 struct device_attribute *attr,
1035 struct bonding *bond = to_bond(d);
1037 if (bond->primary_slave)
1038 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1043 static ssize_t bonding_store_primary(struct device *d,
1044 struct device_attribute *attr,
1045 const char *buf, size_t count)
1048 struct slave *slave;
1049 struct bonding *bond = to_bond(d);
1050 char ifname[IFNAMSIZ];
1052 if (!rtnl_trylock())
1053 return restart_syscall();
1055 read_lock(&bond->lock);
1056 write_lock_bh(&bond->curr_slave_lock);
1058 if (!USES_PRIMARY(bond->params.mode)) {
1059 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1060 bond->dev->name, bond->dev->name, bond->params.mode);
1064 sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1066 /* check to see if we are clearing primary */
1067 if (!strlen(ifname) || buf[0] == '\n') {
1068 pr_info("%s: Setting primary slave to None.\n",
1070 bond->primary_slave = NULL;
1071 bond_select_active_slave(bond);
1075 bond_for_each_slave(bond, slave, i) {
1076 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1077 pr_info("%s: Setting %s as primary slave.\n",
1078 bond->dev->name, slave->dev->name);
1079 bond->primary_slave = slave;
1080 strcpy(bond->params.primary, slave->dev->name);
1081 bond_select_active_slave(bond);
1086 pr_info("%s: Unable to set %.*s as primary slave.\n",
1087 bond->dev->name, (int)strlen(buf) - 1, buf);
1089 write_unlock_bh(&bond->curr_slave_lock);
1090 read_unlock(&bond->lock);
1091 unblock_netpoll_tx();
1096 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1097 bonding_show_primary, bonding_store_primary);
1100 * Show and set the primary_reselect flag.
1102 static ssize_t bonding_show_primary_reselect(struct device *d,
1103 struct device_attribute *attr,
1106 struct bonding *bond = to_bond(d);
1108 return sprintf(buf, "%s %d\n",
1109 pri_reselect_tbl[bond->params.primary_reselect].modename,
1110 bond->params.primary_reselect);
1113 static ssize_t bonding_store_primary_reselect(struct device *d,
1114 struct device_attribute *attr,
1115 const char *buf, size_t count)
1117 int new_value, ret = count;
1118 struct bonding *bond = to_bond(d);
1120 if (!rtnl_trylock())
1121 return restart_syscall();
1123 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1124 if (new_value < 0) {
1125 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1127 (int) strlen(buf) - 1, buf);
1132 bond->params.primary_reselect = new_value;
1133 pr_info("%s: setting primary_reselect to %s (%d).\n",
1134 bond->dev->name, pri_reselect_tbl[new_value].modename,
1138 read_lock(&bond->lock);
1139 write_lock_bh(&bond->curr_slave_lock);
1140 bond_select_active_slave(bond);
1141 write_unlock_bh(&bond->curr_slave_lock);
1142 read_unlock(&bond->lock);
1143 unblock_netpoll_tx();
1148 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1149 bonding_show_primary_reselect,
1150 bonding_store_primary_reselect);
1153 * Show and set the use_carrier flag.
1155 static ssize_t bonding_show_carrier(struct device *d,
1156 struct device_attribute *attr,
1159 struct bonding *bond = to_bond(d);
1161 return sprintf(buf, "%d\n", bond->params.use_carrier);
1164 static ssize_t bonding_store_carrier(struct device *d,
1165 struct device_attribute *attr,
1166 const char *buf, size_t count)
1168 int new_value, ret = count;
1169 struct bonding *bond = to_bond(d);
1172 if (sscanf(buf, "%d", &new_value) != 1) {
1173 pr_err("%s: no use_carrier value specified.\n",
1178 if ((new_value == 0) || (new_value == 1)) {
1179 bond->params.use_carrier = new_value;
1180 pr_info("%s: Setting use_carrier to %d.\n",
1181 bond->dev->name, new_value);
1183 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1184 bond->dev->name, new_value);
1189 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1190 bonding_show_carrier, bonding_store_carrier);
1194 * Show and set currently active_slave.
1196 static ssize_t bonding_show_active_slave(struct device *d,
1197 struct device_attribute *attr,
1201 struct bonding *bond = to_bond(d);
1204 read_lock(&bond->curr_slave_lock);
1205 curr = bond->curr_active_slave;
1206 read_unlock(&bond->curr_slave_lock);
1208 if (USES_PRIMARY(bond->params.mode) && curr)
1209 count = sprintf(buf, "%s\n", curr->dev->name);
1213 static ssize_t bonding_store_active_slave(struct device *d,
1214 struct device_attribute *attr,
1215 const char *buf, size_t count)
1218 struct slave *slave;
1219 struct slave *old_active = NULL;
1220 struct slave *new_active = NULL;
1221 struct bonding *bond = to_bond(d);
1222 char ifname[IFNAMSIZ];
1224 if (!rtnl_trylock())
1225 return restart_syscall();
1228 read_lock(&bond->lock);
1229 write_lock_bh(&bond->curr_slave_lock);
1231 if (!USES_PRIMARY(bond->params.mode)) {
1232 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1233 bond->dev->name, bond->dev->name, bond->params.mode);
1237 sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1239 /* check to see if we are clearing active */
1240 if (!strlen(ifname) || buf[0] == '\n') {
1241 pr_info("%s: Clearing current active slave.\n",
1243 bond->curr_active_slave = NULL;
1244 bond_select_active_slave(bond);
1248 bond_for_each_slave(bond, slave, i) {
1249 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1250 old_active = bond->curr_active_slave;
1252 if (new_active == old_active) {
1254 pr_info("%s: %s is already the current"
1263 (new_active->link == BOND_LINK_UP) &&
1264 IS_UP(new_active->dev)) {
1265 pr_info("%s: Setting %s as active"
1269 bond_change_active_slave(bond,
1273 pr_info("%s: Could not set %s as"
1274 " active slave; either %s is"
1275 " down or the link is down.\n",
1285 pr_info("%s: Unable to set %.*s as active slave.\n",
1286 bond->dev->name, (int)strlen(buf) - 1, buf);
1288 write_unlock_bh(&bond->curr_slave_lock);
1289 read_unlock(&bond->lock);
1290 unblock_netpoll_tx();
1297 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1298 bonding_show_active_slave, bonding_store_active_slave);
1302 * Show link status of the bond interface.
1304 static ssize_t bonding_show_mii_status(struct device *d,
1305 struct device_attribute *attr,
1309 struct bonding *bond = to_bond(d);
1311 read_lock(&bond->curr_slave_lock);
1312 curr = bond->curr_active_slave;
1313 read_unlock(&bond->curr_slave_lock);
1315 return sprintf(buf, "%s\n", curr ? "up" : "down");
1317 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1321 * Show current 802.3ad aggregator ID.
1323 static ssize_t bonding_show_ad_aggregator(struct device *d,
1324 struct device_attribute *attr,
1328 struct bonding *bond = to_bond(d);
1330 if (bond->params.mode == BOND_MODE_8023AD) {
1331 struct ad_info ad_info;
1332 count = sprintf(buf, "%d\n",
1333 (bond_3ad_get_active_agg_info(bond, &ad_info))
1334 ? 0 : ad_info.aggregator_id);
1339 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1343 * Show number of active 802.3ad ports.
1345 static ssize_t bonding_show_ad_num_ports(struct device *d,
1346 struct device_attribute *attr,
1350 struct bonding *bond = to_bond(d);
1352 if (bond->params.mode == BOND_MODE_8023AD) {
1353 struct ad_info ad_info;
1354 count = sprintf(buf, "%d\n",
1355 (bond_3ad_get_active_agg_info(bond, &ad_info))
1356 ? 0 : ad_info.ports);
1361 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1365 * Show current 802.3ad actor key.
1367 static ssize_t bonding_show_ad_actor_key(struct device *d,
1368 struct device_attribute *attr,
1372 struct bonding *bond = to_bond(d);
1374 if (bond->params.mode == BOND_MODE_8023AD) {
1375 struct ad_info ad_info;
1376 count = sprintf(buf, "%d\n",
1377 (bond_3ad_get_active_agg_info(bond, &ad_info))
1378 ? 0 : ad_info.actor_key);
1383 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1387 * Show current 802.3ad partner key.
1389 static ssize_t bonding_show_ad_partner_key(struct device *d,
1390 struct device_attribute *attr,
1394 struct bonding *bond = to_bond(d);
1396 if (bond->params.mode == BOND_MODE_8023AD) {
1397 struct ad_info ad_info;
1398 count = sprintf(buf, "%d\n",
1399 (bond_3ad_get_active_agg_info(bond, &ad_info))
1400 ? 0 : ad_info.partner_key);
1405 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1409 * Show current 802.3ad partner mac.
1411 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1412 struct device_attribute *attr,
1416 struct bonding *bond = to_bond(d);
1418 if (bond->params.mode == BOND_MODE_8023AD) {
1419 struct ad_info ad_info;
1420 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1421 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1426 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1429 * Show the queue_ids of the slaves in the current bond.
1431 static ssize_t bonding_show_queue_id(struct device *d,
1432 struct device_attribute *attr,
1435 struct slave *slave;
1437 struct bonding *bond = to_bond(d);
1439 if (!rtnl_trylock())
1440 return restart_syscall();
1442 read_lock(&bond->lock);
1443 bond_for_each_slave(bond, slave, i) {
1444 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1445 /* not enough space for another interface_name:queue_id pair */
1446 if ((PAGE_SIZE - res) > 10)
1447 res = PAGE_SIZE - 10;
1448 res += sprintf(buf + res, "++more++ ");
1451 res += sprintf(buf + res, "%s:%d ",
1452 slave->dev->name, slave->queue_id);
1454 read_unlock(&bond->lock);
1456 buf[res-1] = '\n'; /* eat the leftover space */
1462 * Set the queue_ids of the slaves in the current bond. The bond
1463 * interface must be enslaved for this to work.
1465 static ssize_t bonding_store_queue_id(struct device *d,
1466 struct device_attribute *attr,
1467 const char *buffer, size_t count)
1469 struct slave *slave, *update_slave;
1470 struct bonding *bond = to_bond(d);
1474 struct net_device *sdev = NULL;
1476 if (!rtnl_trylock())
1477 return restart_syscall();
1479 /* delim will point to queue id if successful */
1480 delim = strchr(buffer, ':');
1485 * Terminate string that points to device name and bump it
1486 * up one, so we can read the queue id there.
1489 if (sscanf(++delim, "%hd\n", &qid) != 1)
1492 /* Check buffer length, valid ifname and queue id */
1493 if (strlen(buffer) > IFNAMSIZ ||
1494 !dev_valid_name(buffer) ||
1495 qid > bond->params.tx_queues)
1498 /* Get the pointer to that interface if it exists */
1499 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1503 read_lock(&bond->lock);
1505 /* Search for thes slave and check for duplicate qids */
1506 update_slave = NULL;
1507 bond_for_each_slave(bond, slave, i) {
1508 if (sdev == slave->dev)
1510 * We don't need to check the matching
1511 * slave for dups, since we're overwriting it
1513 update_slave = slave;
1514 else if (qid && qid == slave->queue_id) {
1515 goto err_no_cmd_unlock;
1520 goto err_no_cmd_unlock;
1522 /* Actually set the qids for the slave */
1523 update_slave->queue_id = qid;
1525 read_unlock(&bond->lock);
1531 read_unlock(&bond->lock);
1533 pr_info("invalid input for queue_id set for %s.\n",
1539 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1540 bonding_store_queue_id);
1544 * Show and set the all_slaves_active flag.
1546 static ssize_t bonding_show_slaves_active(struct device *d,
1547 struct device_attribute *attr,
1550 struct bonding *bond = to_bond(d);
1552 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1555 static ssize_t bonding_store_slaves_active(struct device *d,
1556 struct device_attribute *attr,
1557 const char *buf, size_t count)
1559 int i, new_value, ret = count;
1560 struct bonding *bond = to_bond(d);
1561 struct slave *slave;
1563 if (sscanf(buf, "%d", &new_value) != 1) {
1564 pr_err("%s: no all_slaves_active value specified.\n",
1570 if (new_value == bond->params.all_slaves_active)
1573 if ((new_value == 0) || (new_value == 1)) {
1574 bond->params.all_slaves_active = new_value;
1576 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1577 bond->dev->name, new_value);
1582 bond_for_each_slave(bond, slave, i) {
1583 if (!bond_is_active_slave(slave)) {
1585 slave->inactive = 0;
1587 slave->inactive = 1;
1593 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1594 bonding_show_slaves_active, bonding_store_slaves_active);
1597 * Show and set the number of IGMP membership reports to send on link failure
1599 static ssize_t bonding_show_resend_igmp(struct device *d,
1600 struct device_attribute *attr,
1603 struct bonding *bond = to_bond(d);
1605 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1608 static ssize_t bonding_store_resend_igmp(struct device *d,
1609 struct device_attribute *attr,
1610 const char *buf, size_t count)
1612 int new_value, ret = count;
1613 struct bonding *bond = to_bond(d);
1615 if (sscanf(buf, "%d", &new_value) != 1) {
1616 pr_err("%s: no resend_igmp value specified.\n",
1622 if (new_value < 0 || new_value > 255) {
1623 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1624 bond->dev->name, new_value);
1629 pr_info("%s: Setting resend_igmp to %d.\n",
1630 bond->dev->name, new_value);
1631 bond->params.resend_igmp = new_value;
1636 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1637 bonding_show_resend_igmp, bonding_store_resend_igmp);
1639 static struct attribute *per_bond_attrs[] = {
1640 &dev_attr_slaves.attr,
1641 &dev_attr_mode.attr,
1642 &dev_attr_fail_over_mac.attr,
1643 &dev_attr_arp_validate.attr,
1644 &dev_attr_arp_interval.attr,
1645 &dev_attr_arp_ip_target.attr,
1646 &dev_attr_downdelay.attr,
1647 &dev_attr_updelay.attr,
1648 &dev_attr_lacp_rate.attr,
1649 &dev_attr_ad_select.attr,
1650 &dev_attr_xmit_hash_policy.attr,
1651 &dev_attr_num_grat_arp.attr,
1652 &dev_attr_num_unsol_na.attr,
1653 &dev_attr_miimon.attr,
1654 &dev_attr_primary.attr,
1655 &dev_attr_primary_reselect.attr,
1656 &dev_attr_use_carrier.attr,
1657 &dev_attr_active_slave.attr,
1658 &dev_attr_mii_status.attr,
1659 &dev_attr_ad_aggregator.attr,
1660 &dev_attr_ad_num_ports.attr,
1661 &dev_attr_ad_actor_key.attr,
1662 &dev_attr_ad_partner_key.attr,
1663 &dev_attr_ad_partner_mac.attr,
1664 &dev_attr_queue_id.attr,
1665 &dev_attr_all_slaves_active.attr,
1666 &dev_attr_resend_igmp.attr,
1667 &dev_attr_min_links.attr,
1671 static struct attribute_group bonding_group = {
1673 .attrs = per_bond_attrs,
1677 * Initialize sysfs. This sets up the bonding_masters file in
1680 int bond_create_sysfs(struct bond_net *bn)
1684 bn->class_attr_bonding_masters = class_attr_bonding_masters;
1685 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1687 ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1689 * Permit multiple loads of the module by ignoring failures to
1690 * create the bonding_masters sysfs file. Bonding devices
1691 * created by second or subsequent loads of the module will
1692 * not be listed in, or controllable by, bonding_masters, but
1693 * will have the usual "bonding" sysfs directory.
1695 * This is done to preserve backwards compatibility for
1696 * initscripts/sysconfig, which load bonding multiple times to
1697 * configure multiple bonding devices.
1699 if (ret == -EEXIST) {
1700 /* Is someone being kinky and naming a device bonding_master? */
1701 if (__dev_get_by_name(bn->net,
1702 class_attr_bonding_masters.attr.name))
1703 pr_err("network device named %s already exists in sysfs",
1704 class_attr_bonding_masters.attr.name);
1713 * Remove /sys/class/net/bonding_masters.
1715 void bond_destroy_sysfs(struct bond_net *bn)
1717 netdev_class_remove_file(&bn->class_attr_bonding_masters);
1721 * Initialize sysfs for each bond. This sets up and registers
1722 * the 'bondctl' directory for each individual bond under /sys/class/net.
1724 void bond_prepare_sysfs_group(struct bonding *bond)
1726 bond->dev->sysfs_groups[0] = &bonding_group;