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,
58 struct net *net = current->nsproxy->net_ns;
59 struct bond_net *bn = net_generic(net, bond_net_id);
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 net *net, const char *ifname)
84 struct bond_net *bn = net_generic(net, bond_net_id);
87 list_for_each_entry(bond, &bn->dev_list, bond_list) {
88 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
95 * "store" function for the bond_masters attribute. This is what
96 * creates and deletes entire bonds.
98 * The class parameter is ignored.
102 static ssize_t bonding_store_bonds(struct class *cls,
103 struct class_attribute *attr,
104 const char *buffer, size_t count)
106 struct net *net = current->nsproxy->net_ns;
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(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(net, 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 /* class attribute for bond_masters file. This ends up in /sys/class/net */
154 static CLASS_ATTR(bonding_masters, S_IWUSR | S_IRUGO,
155 bonding_show_bonds, bonding_store_bonds);
157 int bond_create_slave_symlinks(struct net_device *master,
158 struct net_device *slave)
160 char linkname[IFNAMSIZ+7];
163 /* first, create a link from the slave back to the master */
164 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
168 /* next, create a link from the master to the slave */
169 sprintf(linkname, "slave_%s", slave->name);
170 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
176 void bond_destroy_slave_symlinks(struct net_device *master,
177 struct net_device *slave)
179 char linkname[IFNAMSIZ+7];
181 sysfs_remove_link(&(slave->dev.kobj), "master");
182 sprintf(linkname, "slave_%s", slave->name);
183 sysfs_remove_link(&(master->dev.kobj), linkname);
188 * Show the slaves in the current bond.
190 static ssize_t bonding_show_slaves(struct device *d,
191 struct device_attribute *attr, char *buf)
195 struct bonding *bond = to_bond(d);
197 read_lock(&bond->lock);
198 bond_for_each_slave(bond, slave, i) {
199 if (res > (PAGE_SIZE - IFNAMSIZ)) {
200 /* not enough space for another interface name */
201 if ((PAGE_SIZE - res) > 10)
202 res = PAGE_SIZE - 10;
203 res += sprintf(buf + res, "++more++ ");
206 res += sprintf(buf + res, "%s ", slave->dev->name);
208 read_unlock(&bond->lock);
210 buf[res-1] = '\n'; /* eat the leftover space */
215 * Set the slaves in the current bond. The bond interface must be
216 * up for this to succeed.
217 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
218 * All hard work should be done there.
220 static ssize_t bonding_store_slaves(struct device *d,
221 struct device_attribute *attr,
222 const char *buffer, size_t count)
224 char command[IFNAMSIZ + 1] = { 0, };
226 int res, ret = count;
227 struct net_device *dev;
228 struct bonding *bond = to_bond(d);
231 return restart_syscall();
233 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
234 ifname = command + 1;
235 if ((strlen(command) <= 1) ||
236 !dev_valid_name(ifname))
239 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
241 pr_info("%s: Interface %s does not exist!\n",
242 bond->dev->name, ifname);
247 switch (command[0]) {
249 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
250 res = bond_enslave(bond->dev, dev);
254 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
255 res = bond_release(bond->dev, dev);
267 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
276 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
277 bonding_store_slaves);
280 * Show and set the bonding mode. The bond interface must be down to
283 static ssize_t bonding_show_mode(struct device *d,
284 struct device_attribute *attr, char *buf)
286 struct bonding *bond = to_bond(d);
288 return sprintf(buf, "%s %d\n",
289 bond_mode_tbl[bond->params.mode].modename,
293 static ssize_t bonding_store_mode(struct device *d,
294 struct device_attribute *attr,
295 const char *buf, size_t count)
297 int new_value, ret = count;
298 struct bonding *bond = to_bond(d);
300 if (bond->dev->flags & IFF_UP) {
301 pr_err("unable to update mode of %s because interface is up.\n",
307 new_value = bond_parse_parm(buf, bond_mode_tbl);
309 pr_err("%s: Ignoring invalid mode value %.*s.\n",
310 bond->dev->name, (int)strlen(buf) - 1, buf);
314 if ((new_value == BOND_MODE_ALB ||
315 new_value == BOND_MODE_TLB) &&
316 bond->params.arp_interval) {
317 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
318 bond->dev->name, bond_mode_tbl[new_value].modename);
323 bond->params.mode = new_value;
324 bond_set_mode_ops(bond, bond->params.mode);
325 pr_info("%s: setting mode to %s (%d).\n",
326 bond->dev->name, bond_mode_tbl[new_value].modename,
331 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
332 bonding_show_mode, bonding_store_mode);
335 * Show and set the bonding transmit hash method.
336 * The bond interface must be down to change the xmit hash policy.
338 static ssize_t bonding_show_xmit_hash(struct device *d,
339 struct device_attribute *attr,
342 struct bonding *bond = to_bond(d);
344 return sprintf(buf, "%s %d\n",
345 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
346 bond->params.xmit_policy);
349 static ssize_t bonding_store_xmit_hash(struct device *d,
350 struct device_attribute *attr,
351 const char *buf, size_t count)
353 int new_value, ret = count;
354 struct bonding *bond = to_bond(d);
356 if (bond->dev->flags & IFF_UP) {
357 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
363 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
365 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
367 (int)strlen(buf) - 1, buf);
371 bond->params.xmit_policy = new_value;
372 bond_set_mode_ops(bond, bond->params.mode);
373 pr_info("%s: setting xmit hash policy to %s (%d).\n",
375 xmit_hashtype_tbl[new_value].modename, new_value);
380 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
381 bonding_show_xmit_hash, bonding_store_xmit_hash);
384 * Show and set arp_validate.
386 static ssize_t bonding_show_arp_validate(struct device *d,
387 struct device_attribute *attr,
390 struct bonding *bond = to_bond(d);
392 return sprintf(buf, "%s %d\n",
393 arp_validate_tbl[bond->params.arp_validate].modename,
394 bond->params.arp_validate);
397 static ssize_t bonding_store_arp_validate(struct device *d,
398 struct device_attribute *attr,
399 const char *buf, size_t count)
402 struct bonding *bond = to_bond(d);
404 new_value = bond_parse_parm(buf, arp_validate_tbl);
406 pr_err("%s: Ignoring invalid arp_validate value %s\n",
407 bond->dev->name, buf);
410 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
411 pr_err("%s: arp_validate only supported in active-backup mode.\n",
415 pr_info("%s: setting arp_validate to %s (%d).\n",
416 bond->dev->name, arp_validate_tbl[new_value].modename,
419 bond->params.arp_validate = new_value;
424 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
425 bonding_store_arp_validate);
428 * Show and store fail_over_mac. User only allowed to change the
429 * value when there are no slaves.
431 static ssize_t bonding_show_fail_over_mac(struct device *d,
432 struct device_attribute *attr,
435 struct bonding *bond = to_bond(d);
437 return sprintf(buf, "%s %d\n",
438 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
439 bond->params.fail_over_mac);
442 static ssize_t bonding_store_fail_over_mac(struct device *d,
443 struct device_attribute *attr,
444 const char *buf, size_t count)
447 struct bonding *bond = to_bond(d);
449 if (bond->slave_cnt != 0) {
450 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
455 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
457 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
458 bond->dev->name, buf);
462 bond->params.fail_over_mac = new_value;
463 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
464 bond->dev->name, fail_over_mac_tbl[new_value].modename,
470 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
471 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
474 * Show and set the arp timer interval. There are two tricky bits
475 * here. First, if ARP monitoring is activated, then we must disable
476 * MII monitoring. Second, if the ARP timer isn't running, we must
479 static ssize_t bonding_show_arp_interval(struct device *d,
480 struct device_attribute *attr,
483 struct bonding *bond = to_bond(d);
485 return sprintf(buf, "%d\n", bond->params.arp_interval);
488 static ssize_t bonding_store_arp_interval(struct device *d,
489 struct device_attribute *attr,
490 const char *buf, size_t count)
492 int new_value, ret = count;
493 struct bonding *bond = to_bond(d);
495 if (sscanf(buf, "%d", &new_value) != 1) {
496 pr_err("%s: no arp_interval value specified.\n",
502 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
503 bond->dev->name, new_value, INT_MAX);
507 if (bond->params.mode == BOND_MODE_ALB ||
508 bond->params.mode == BOND_MODE_TLB) {
509 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
510 bond->dev->name, bond->dev->name);
514 pr_info("%s: Setting ARP monitoring interval to %d.\n",
515 bond->dev->name, new_value);
516 bond->params.arp_interval = new_value;
517 if (bond->params.miimon) {
518 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
519 bond->dev->name, bond->dev->name);
520 bond->params.miimon = 0;
521 if (delayed_work_pending(&bond->mii_work)) {
522 cancel_delayed_work(&bond->mii_work);
523 flush_workqueue(bond->wq);
526 if (!bond->params.arp_targets[0]) {
527 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
530 if (bond->dev->flags & IFF_UP) {
531 /* If the interface is up, we may need to fire off
532 * the ARP timer. If the interface is down, the
533 * timer will get fired off when the open function
536 if (!delayed_work_pending(&bond->arp_work)) {
537 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
538 INIT_DELAYED_WORK(&bond->arp_work,
539 bond_activebackup_arp_mon);
541 INIT_DELAYED_WORK(&bond->arp_work,
542 bond_loadbalance_arp_mon);
544 queue_delayed_work(bond->wq, &bond->arp_work, 0);
551 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
552 bonding_show_arp_interval, bonding_store_arp_interval);
555 * Show and set the arp targets.
557 static ssize_t bonding_show_arp_targets(struct device *d,
558 struct device_attribute *attr,
562 struct bonding *bond = to_bond(d);
564 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
565 if (bond->params.arp_targets[i])
566 res += sprintf(buf + res, "%pI4 ",
567 &bond->params.arp_targets[i]);
570 buf[res-1] = '\n'; /* eat the leftover space */
574 static ssize_t bonding_store_arp_targets(struct device *d,
575 struct device_attribute *attr,
576 const char *buf, size_t count)
579 int i = 0, done = 0, ret = count;
580 struct bonding *bond = to_bond(d);
583 targets = bond->params.arp_targets;
584 newtarget = in_aton(buf + 1);
587 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
588 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
589 bond->dev->name, &newtarget);
593 /* look for an empty slot to put the target in, and check for dupes */
594 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
595 if (targets[i] == newtarget) { /* duplicate */
596 pr_err("%s: ARP target %pI4 is already present\n",
597 bond->dev->name, &newtarget);
601 if (targets[i] == 0) {
602 pr_info("%s: adding ARP target %pI4.\n",
603 bond->dev->name, &newtarget);
605 targets[i] = newtarget;
609 pr_err("%s: ARP target table is full!\n",
615 } else if (buf[0] == '-') {
616 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
617 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
618 bond->dev->name, &newtarget);
623 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
624 if (targets[i] == newtarget) {
626 pr_info("%s: removing ARP target %pI4.\n",
627 bond->dev->name, &newtarget);
628 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
629 targets[j] = targets[j+1];
636 pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
637 bond->dev->name, &newtarget);
642 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
651 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
654 * Show and set the up and down delays. These must be multiples of the
655 * MII monitoring value, and are stored internally as the multiplier.
656 * Thus, we must translate to MS for the real world.
658 static ssize_t bonding_show_downdelay(struct device *d,
659 struct device_attribute *attr,
662 struct bonding *bond = to_bond(d);
664 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
667 static ssize_t bonding_store_downdelay(struct device *d,
668 struct device_attribute *attr,
669 const char *buf, size_t count)
671 int new_value, ret = count;
672 struct bonding *bond = to_bond(d);
674 if (!(bond->params.miimon)) {
675 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
681 if (sscanf(buf, "%d", &new_value) != 1) {
682 pr_err("%s: no down delay value specified.\n", bond->dev->name);
687 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
688 bond->dev->name, new_value, 1, INT_MAX);
692 if ((new_value % bond->params.miimon) != 0) {
693 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
694 bond->dev->name, new_value,
696 (new_value / bond->params.miimon) *
697 bond->params.miimon);
699 bond->params.downdelay = new_value / bond->params.miimon;
700 pr_info("%s: Setting down delay to %d.\n",
702 bond->params.downdelay * bond->params.miimon);
709 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
710 bonding_show_downdelay, bonding_store_downdelay);
712 static ssize_t bonding_show_updelay(struct device *d,
713 struct device_attribute *attr,
716 struct bonding *bond = to_bond(d);
718 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
722 static ssize_t bonding_store_updelay(struct device *d,
723 struct device_attribute *attr,
724 const char *buf, size_t count)
726 int new_value, ret = count;
727 struct bonding *bond = to_bond(d);
729 if (!(bond->params.miimon)) {
730 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
736 if (sscanf(buf, "%d", &new_value) != 1) {
737 pr_err("%s: no up delay value specified.\n",
743 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
744 bond->dev->name, new_value, 1, INT_MAX);
748 if ((new_value % bond->params.miimon) != 0) {
749 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
750 bond->dev->name, new_value,
752 (new_value / bond->params.miimon) *
753 bond->params.miimon);
755 bond->params.updelay = new_value / bond->params.miimon;
756 pr_info("%s: Setting up delay to %d.\n",
758 bond->params.updelay * bond->params.miimon);
764 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
765 bonding_show_updelay, bonding_store_updelay);
768 * Show and set the LACP interval. Interface must be down, and the mode
769 * must be set to 802.3ad mode.
771 static ssize_t bonding_show_lacp(struct device *d,
772 struct device_attribute *attr,
775 struct bonding *bond = to_bond(d);
777 return sprintf(buf, "%s %d\n",
778 bond_lacp_tbl[bond->params.lacp_fast].modename,
779 bond->params.lacp_fast);
782 static ssize_t bonding_store_lacp(struct device *d,
783 struct device_attribute *attr,
784 const char *buf, size_t count)
786 int new_value, ret = count;
787 struct bonding *bond = to_bond(d);
789 if (bond->dev->flags & IFF_UP) {
790 pr_err("%s: Unable to update LACP rate because interface is up.\n",
796 if (bond->params.mode != BOND_MODE_8023AD) {
797 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
803 new_value = bond_parse_parm(buf, bond_lacp_tbl);
805 if ((new_value == 1) || (new_value == 0)) {
806 bond->params.lacp_fast = new_value;
807 pr_info("%s: Setting LACP rate to %s (%d).\n",
808 bond->dev->name, bond_lacp_tbl[new_value].modename,
811 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
812 bond->dev->name, (int)strlen(buf) - 1, buf);
818 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
819 bonding_show_lacp, bonding_store_lacp);
821 static ssize_t bonding_show_ad_select(struct device *d,
822 struct device_attribute *attr,
825 struct bonding *bond = to_bond(d);
827 return sprintf(buf, "%s %d\n",
828 ad_select_tbl[bond->params.ad_select].modename,
829 bond->params.ad_select);
833 static ssize_t bonding_store_ad_select(struct device *d,
834 struct device_attribute *attr,
835 const char *buf, size_t count)
837 int new_value, ret = count;
838 struct bonding *bond = to_bond(d);
840 if (bond->dev->flags & IFF_UP) {
841 pr_err("%s: Unable to update ad_select because interface is up.\n",
847 new_value = bond_parse_parm(buf, ad_select_tbl);
849 if (new_value != -1) {
850 bond->params.ad_select = new_value;
851 pr_info("%s: Setting ad_select to %s (%d).\n",
852 bond->dev->name, ad_select_tbl[new_value].modename,
855 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
856 bond->dev->name, (int)strlen(buf) - 1, buf);
862 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
863 bonding_show_ad_select, bonding_store_ad_select);
866 * Show and set the number of peer notifications to send after a failover event.
868 static ssize_t bonding_show_num_peer_notif(struct device *d,
869 struct device_attribute *attr,
872 struct bonding *bond = to_bond(d);
873 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
876 static ssize_t bonding_store_num_peer_notif(struct device *d,
877 struct device_attribute *attr,
878 const char *buf, size_t count)
880 struct bonding *bond = to_bond(d);
881 int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
882 return err ? err : count;
884 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
885 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
886 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
887 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
890 * Show and set the MII monitor interval. There are two tricky bits
891 * here. First, if MII monitoring is activated, then we must disable
892 * ARP monitoring. Second, if the timer isn't running, we must
895 static ssize_t bonding_show_miimon(struct device *d,
896 struct device_attribute *attr,
899 struct bonding *bond = to_bond(d);
901 return sprintf(buf, "%d\n", bond->params.miimon);
904 static ssize_t bonding_store_miimon(struct device *d,
905 struct device_attribute *attr,
906 const char *buf, size_t count)
908 int new_value, ret = count;
909 struct bonding *bond = to_bond(d);
911 if (sscanf(buf, "%d", &new_value) != 1) {
912 pr_err("%s: no miimon value specified.\n",
918 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
919 bond->dev->name, new_value, 1, INT_MAX);
923 pr_info("%s: Setting MII monitoring interval to %d.\n",
924 bond->dev->name, new_value);
925 bond->params.miimon = new_value;
926 if (bond->params.updelay)
927 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
929 bond->params.updelay * bond->params.miimon);
930 if (bond->params.downdelay)
931 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
933 bond->params.downdelay * bond->params.miimon);
934 if (bond->params.arp_interval) {
935 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
937 bond->params.arp_interval = 0;
938 if (bond->params.arp_validate) {
939 bond->params.arp_validate =
940 BOND_ARP_VALIDATE_NONE;
942 if (delayed_work_pending(&bond->arp_work)) {
943 cancel_delayed_work(&bond->arp_work);
944 flush_workqueue(bond->wq);
948 if (bond->dev->flags & IFF_UP) {
949 /* If the interface is up, we may need to fire off
950 * the MII timer. If the interface is down, the
951 * timer will get fired off when the open function
954 if (!delayed_work_pending(&bond->mii_work)) {
955 INIT_DELAYED_WORK(&bond->mii_work,
957 queue_delayed_work(bond->wq,
965 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
966 bonding_show_miimon, bonding_store_miimon);
969 * Show and set the primary slave. The store function is much
970 * simpler than bonding_store_slaves function because it only needs to
971 * handle one interface name.
972 * The bond must be a mode that supports a primary for this be
975 static ssize_t bonding_show_primary(struct device *d,
976 struct device_attribute *attr,
980 struct bonding *bond = to_bond(d);
982 if (bond->primary_slave)
983 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
988 static ssize_t bonding_store_primary(struct device *d,
989 struct device_attribute *attr,
990 const char *buf, size_t count)
994 struct bonding *bond = to_bond(d);
995 char ifname[IFNAMSIZ];
998 return restart_syscall();
1000 read_lock(&bond->lock);
1001 write_lock_bh(&bond->curr_slave_lock);
1003 if (!USES_PRIMARY(bond->params.mode)) {
1004 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1005 bond->dev->name, bond->dev->name, bond->params.mode);
1009 sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1011 /* check to see if we are clearing primary */
1012 if (!strlen(ifname) || buf[0] == '\n') {
1013 pr_info("%s: Setting primary slave to None.\n",
1015 bond->primary_slave = NULL;
1016 bond_select_active_slave(bond);
1020 bond_for_each_slave(bond, slave, i) {
1021 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1022 pr_info("%s: Setting %s as primary slave.\n",
1023 bond->dev->name, slave->dev->name);
1024 bond->primary_slave = slave;
1025 strcpy(bond->params.primary, slave->dev->name);
1026 bond_select_active_slave(bond);
1031 pr_info("%s: Unable to set %.*s as primary slave.\n",
1032 bond->dev->name, (int)strlen(buf) - 1, buf);
1034 write_unlock_bh(&bond->curr_slave_lock);
1035 read_unlock(&bond->lock);
1036 unblock_netpoll_tx();
1041 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1042 bonding_show_primary, bonding_store_primary);
1045 * Show and set the primary_reselect flag.
1047 static ssize_t bonding_show_primary_reselect(struct device *d,
1048 struct device_attribute *attr,
1051 struct bonding *bond = to_bond(d);
1053 return sprintf(buf, "%s %d\n",
1054 pri_reselect_tbl[bond->params.primary_reselect].modename,
1055 bond->params.primary_reselect);
1058 static ssize_t bonding_store_primary_reselect(struct device *d,
1059 struct device_attribute *attr,
1060 const char *buf, size_t count)
1062 int new_value, ret = count;
1063 struct bonding *bond = to_bond(d);
1065 if (!rtnl_trylock())
1066 return restart_syscall();
1068 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1069 if (new_value < 0) {
1070 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1072 (int) strlen(buf) - 1, buf);
1077 bond->params.primary_reselect = new_value;
1078 pr_info("%s: setting primary_reselect to %s (%d).\n",
1079 bond->dev->name, pri_reselect_tbl[new_value].modename,
1083 read_lock(&bond->lock);
1084 write_lock_bh(&bond->curr_slave_lock);
1085 bond_select_active_slave(bond);
1086 write_unlock_bh(&bond->curr_slave_lock);
1087 read_unlock(&bond->lock);
1088 unblock_netpoll_tx();
1093 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1094 bonding_show_primary_reselect,
1095 bonding_store_primary_reselect);
1098 * Show and set the use_carrier flag.
1100 static ssize_t bonding_show_carrier(struct device *d,
1101 struct device_attribute *attr,
1104 struct bonding *bond = to_bond(d);
1106 return sprintf(buf, "%d\n", bond->params.use_carrier);
1109 static ssize_t bonding_store_carrier(struct device *d,
1110 struct device_attribute *attr,
1111 const char *buf, size_t count)
1113 int new_value, ret = count;
1114 struct bonding *bond = to_bond(d);
1117 if (sscanf(buf, "%d", &new_value) != 1) {
1118 pr_err("%s: no use_carrier value specified.\n",
1123 if ((new_value == 0) || (new_value == 1)) {
1124 bond->params.use_carrier = new_value;
1125 pr_info("%s: Setting use_carrier to %d.\n",
1126 bond->dev->name, new_value);
1128 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1129 bond->dev->name, new_value);
1134 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1135 bonding_show_carrier, bonding_store_carrier);
1139 * Show and set currently active_slave.
1141 static ssize_t bonding_show_active_slave(struct device *d,
1142 struct device_attribute *attr,
1146 struct bonding *bond = to_bond(d);
1149 read_lock(&bond->curr_slave_lock);
1150 curr = bond->curr_active_slave;
1151 read_unlock(&bond->curr_slave_lock);
1153 if (USES_PRIMARY(bond->params.mode) && curr)
1154 count = sprintf(buf, "%s\n", curr->dev->name);
1158 static ssize_t bonding_store_active_slave(struct device *d,
1159 struct device_attribute *attr,
1160 const char *buf, size_t count)
1163 struct slave *slave;
1164 struct slave *old_active = NULL;
1165 struct slave *new_active = NULL;
1166 struct bonding *bond = to_bond(d);
1167 char ifname[IFNAMSIZ];
1169 if (!rtnl_trylock())
1170 return restart_syscall();
1173 read_lock(&bond->lock);
1174 write_lock_bh(&bond->curr_slave_lock);
1176 if (!USES_PRIMARY(bond->params.mode)) {
1177 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1178 bond->dev->name, bond->dev->name, bond->params.mode);
1182 sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1184 /* check to see if we are clearing active */
1185 if (!strlen(ifname) || buf[0] == '\n') {
1186 pr_info("%s: Clearing current active slave.\n",
1188 bond->curr_active_slave = NULL;
1189 bond_select_active_slave(bond);
1193 bond_for_each_slave(bond, slave, i) {
1194 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1195 old_active = bond->curr_active_slave;
1197 if (new_active == old_active) {
1199 pr_info("%s: %s is already the current"
1208 (new_active->link == BOND_LINK_UP) &&
1209 IS_UP(new_active->dev)) {
1210 pr_info("%s: Setting %s as active"
1214 bond_change_active_slave(bond,
1218 pr_info("%s: Could not set %s as"
1219 " active slave; either %s is"
1220 " down or the link is down.\n",
1230 pr_info("%s: Unable to set %.*s as active slave.\n",
1231 bond->dev->name, (int)strlen(buf) - 1, buf);
1233 write_unlock_bh(&bond->curr_slave_lock);
1234 read_unlock(&bond->lock);
1235 unblock_netpoll_tx();
1242 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1243 bonding_show_active_slave, bonding_store_active_slave);
1247 * Show link status of the bond interface.
1249 static ssize_t bonding_show_mii_status(struct device *d,
1250 struct device_attribute *attr,
1254 struct bonding *bond = to_bond(d);
1256 read_lock(&bond->curr_slave_lock);
1257 curr = bond->curr_active_slave;
1258 read_unlock(&bond->curr_slave_lock);
1260 return sprintf(buf, "%s\n", curr ? "up" : "down");
1262 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1266 * Show current 802.3ad aggregator ID.
1268 static ssize_t bonding_show_ad_aggregator(struct device *d,
1269 struct device_attribute *attr,
1273 struct bonding *bond = to_bond(d);
1275 if (bond->params.mode == BOND_MODE_8023AD) {
1276 struct ad_info ad_info;
1277 count = sprintf(buf, "%d\n",
1278 (bond_3ad_get_active_agg_info(bond, &ad_info))
1279 ? 0 : ad_info.aggregator_id);
1284 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1288 * Show number of active 802.3ad ports.
1290 static ssize_t bonding_show_ad_num_ports(struct device *d,
1291 struct device_attribute *attr,
1295 struct bonding *bond = to_bond(d);
1297 if (bond->params.mode == BOND_MODE_8023AD) {
1298 struct ad_info ad_info;
1299 count = sprintf(buf, "%d\n",
1300 (bond_3ad_get_active_agg_info(bond, &ad_info))
1301 ? 0 : ad_info.ports);
1306 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1310 * Show current 802.3ad actor key.
1312 static ssize_t bonding_show_ad_actor_key(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.actor_key);
1328 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1332 * Show current 802.3ad partner key.
1334 static ssize_t bonding_show_ad_partner_key(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.partner_key);
1350 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1354 * Show current 802.3ad partner mac.
1356 static ssize_t bonding_show_ad_partner_mac(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 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1366 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1371 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1374 * Show the queue_ids of the slaves in the current bond.
1376 static ssize_t bonding_show_queue_id(struct device *d,
1377 struct device_attribute *attr,
1380 struct slave *slave;
1382 struct bonding *bond = to_bond(d);
1384 if (!rtnl_trylock())
1385 return restart_syscall();
1387 read_lock(&bond->lock);
1388 bond_for_each_slave(bond, slave, i) {
1389 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1390 /* not enough space for another interface_name:queue_id pair */
1391 if ((PAGE_SIZE - res) > 10)
1392 res = PAGE_SIZE - 10;
1393 res += sprintf(buf + res, "++more++ ");
1396 res += sprintf(buf + res, "%s:%d ",
1397 slave->dev->name, slave->queue_id);
1399 read_unlock(&bond->lock);
1401 buf[res-1] = '\n'; /* eat the leftover space */
1407 * Set the queue_ids of the slaves in the current bond. The bond
1408 * interface must be enslaved for this to work.
1410 static ssize_t bonding_store_queue_id(struct device *d,
1411 struct device_attribute *attr,
1412 const char *buffer, size_t count)
1414 struct slave *slave, *update_slave;
1415 struct bonding *bond = to_bond(d);
1419 struct net_device *sdev = NULL;
1421 if (!rtnl_trylock())
1422 return restart_syscall();
1424 /* delim will point to queue id if successful */
1425 delim = strchr(buffer, ':');
1430 * Terminate string that points to device name and bump it
1431 * up one, so we can read the queue id there.
1434 if (sscanf(++delim, "%hd\n", &qid) != 1)
1437 /* Check buffer length, valid ifname and queue id */
1438 if (strlen(buffer) > IFNAMSIZ ||
1439 !dev_valid_name(buffer) ||
1440 qid > bond->params.tx_queues)
1443 /* Get the pointer to that interface if it exists */
1444 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1448 read_lock(&bond->lock);
1450 /* Search for thes slave and check for duplicate qids */
1451 update_slave = NULL;
1452 bond_for_each_slave(bond, slave, i) {
1453 if (sdev == slave->dev)
1455 * We don't need to check the matching
1456 * slave for dups, since we're overwriting it
1458 update_slave = slave;
1459 else if (qid && qid == slave->queue_id) {
1460 goto err_no_cmd_unlock;
1465 goto err_no_cmd_unlock;
1467 /* Actually set the qids for the slave */
1468 update_slave->queue_id = qid;
1470 read_unlock(&bond->lock);
1476 read_unlock(&bond->lock);
1478 pr_info("invalid input for queue_id set for %s.\n",
1484 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1485 bonding_store_queue_id);
1489 * Show and set the all_slaves_active flag.
1491 static ssize_t bonding_show_slaves_active(struct device *d,
1492 struct device_attribute *attr,
1495 struct bonding *bond = to_bond(d);
1497 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1500 static ssize_t bonding_store_slaves_active(struct device *d,
1501 struct device_attribute *attr,
1502 const char *buf, size_t count)
1504 int i, new_value, ret = count;
1505 struct bonding *bond = to_bond(d);
1506 struct slave *slave;
1508 if (sscanf(buf, "%d", &new_value) != 1) {
1509 pr_err("%s: no all_slaves_active value specified.\n",
1515 if (new_value == bond->params.all_slaves_active)
1518 if ((new_value == 0) || (new_value == 1)) {
1519 bond->params.all_slaves_active = new_value;
1521 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1522 bond->dev->name, new_value);
1527 bond_for_each_slave(bond, slave, i) {
1528 if (!bond_is_active_slave(slave)) {
1530 slave->inactive = 0;
1532 slave->inactive = 1;
1538 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1539 bonding_show_slaves_active, bonding_store_slaves_active);
1542 * Show and set the number of IGMP membership reports to send on link failure
1544 static ssize_t bonding_show_resend_igmp(struct device *d,
1545 struct device_attribute *attr,
1548 struct bonding *bond = to_bond(d);
1550 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1553 static ssize_t bonding_store_resend_igmp(struct device *d,
1554 struct device_attribute *attr,
1555 const char *buf, size_t count)
1557 int new_value, ret = count;
1558 struct bonding *bond = to_bond(d);
1560 if (sscanf(buf, "%d", &new_value) != 1) {
1561 pr_err("%s: no resend_igmp value specified.\n",
1567 if (new_value < 0 || new_value > 255) {
1568 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1569 bond->dev->name, new_value);
1574 pr_info("%s: Setting resend_igmp to %d.\n",
1575 bond->dev->name, new_value);
1576 bond->params.resend_igmp = new_value;
1581 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1582 bonding_show_resend_igmp, bonding_store_resend_igmp);
1584 static struct attribute *per_bond_attrs[] = {
1585 &dev_attr_slaves.attr,
1586 &dev_attr_mode.attr,
1587 &dev_attr_fail_over_mac.attr,
1588 &dev_attr_arp_validate.attr,
1589 &dev_attr_arp_interval.attr,
1590 &dev_attr_arp_ip_target.attr,
1591 &dev_attr_downdelay.attr,
1592 &dev_attr_updelay.attr,
1593 &dev_attr_lacp_rate.attr,
1594 &dev_attr_ad_select.attr,
1595 &dev_attr_xmit_hash_policy.attr,
1596 &dev_attr_num_grat_arp.attr,
1597 &dev_attr_num_unsol_na.attr,
1598 &dev_attr_miimon.attr,
1599 &dev_attr_primary.attr,
1600 &dev_attr_primary_reselect.attr,
1601 &dev_attr_use_carrier.attr,
1602 &dev_attr_active_slave.attr,
1603 &dev_attr_mii_status.attr,
1604 &dev_attr_ad_aggregator.attr,
1605 &dev_attr_ad_num_ports.attr,
1606 &dev_attr_ad_actor_key.attr,
1607 &dev_attr_ad_partner_key.attr,
1608 &dev_attr_ad_partner_mac.attr,
1609 &dev_attr_queue_id.attr,
1610 &dev_attr_all_slaves_active.attr,
1611 &dev_attr_resend_igmp.attr,
1615 static struct attribute_group bonding_group = {
1617 .attrs = per_bond_attrs,
1621 * Initialize sysfs. This sets up the bonding_masters file in
1624 int bond_create_sysfs(void)
1628 ret = netdev_class_create_file(&class_attr_bonding_masters);
1630 * Permit multiple loads of the module by ignoring failures to
1631 * create the bonding_masters sysfs file. Bonding devices
1632 * created by second or subsequent loads of the module will
1633 * not be listed in, or controllable by, bonding_masters, but
1634 * will have the usual "bonding" sysfs directory.
1636 * This is done to preserve backwards compatibility for
1637 * initscripts/sysconfig, which load bonding multiple times to
1638 * configure multiple bonding devices.
1640 if (ret == -EEXIST) {
1641 /* Is someone being kinky and naming a device bonding_master? */
1642 if (__dev_get_by_name(&init_net,
1643 class_attr_bonding_masters.attr.name))
1644 pr_err("network device named %s already exists in sysfs",
1645 class_attr_bonding_masters.attr.name);
1654 * Remove /sys/class/net/bonding_masters.
1656 void bond_destroy_sysfs(void)
1658 netdev_class_remove_file(&class_attr_bonding_masters);
1662 * Initialize sysfs for each bond. This sets up and registers
1663 * the 'bondctl' directory for each individual bond under /sys/class/net.
1665 void bond_prepare_sysfs_group(struct bonding *bond)
1667 bond->dev->sysfs_groups[0] = &bonding_group;