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.
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/device.h>
25 #include <linux/sysdev.h>
27 #include <linux/types.h>
28 #include <linux/string.h>
29 #include <linux/netdevice.h>
30 #include <linux/inetdevice.h>
32 #include <linux/sysfs.h>
33 #include <linux/ctype.h>
34 #include <linux/inet.h>
35 #include <linux/rtnetlink.h>
36 #include <linux/etherdevice.h>
37 #include <net/net_namespace.h>
41 #define to_dev(obj) container_of(obj, struct device, kobj)
42 #define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
45 * "show" function for the bond_masters attribute.
46 * The class parameter is ignored.
48 static ssize_t bonding_show_bonds(struct class *cls, char *buf)
55 list_for_each_entry(bond, &bond_dev_list, bond_list) {
56 if (res > (PAGE_SIZE - IFNAMSIZ)) {
57 /* not enough space for another interface name */
58 if ((PAGE_SIZE - res) > 10)
60 res += sprintf(buf + res, "++more++ ");
63 res += sprintf(buf + res, "%s ", bond->dev->name);
66 buf[res-1] = '\n'; /* eat the leftover space */
72 static struct net_device *bond_get_by_name(const char *ifname)
76 list_for_each_entry(bond, &bond_dev_list, bond_list) {
77 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
84 * "store" function for the bond_masters attribute. This is what
85 * creates and deletes entire bonds.
87 * The class parameter is ignored.
91 static ssize_t bonding_store_bonds(struct class *cls,
92 const char *buffer, size_t count)
94 char command[IFNAMSIZ + 1] = {0, };
98 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
100 if ((strlen(command) <= 1) ||
101 !dev_valid_name(ifname))
104 if (command[0] == '+') {
106 ": %s is being created...\n", ifname);
107 rv = bond_create(ifname);
109 pr_info(DRV_NAME ": Bond creation failed.\n");
112 } else if (command[0] == '-') {
113 struct net_device *bond_dev;
116 bond_dev = bond_get_by_name(ifname);
118 pr_info(DRV_NAME ": %s is being deleted...\n",
120 unregister_netdevice(bond_dev);
122 pr_err(DRV_NAME ": unable to delete non-existent %s\n",
130 /* Always return either count or an error. If you return 0, you'll
131 * get called forever, which is bad.
136 pr_err(DRV_NAME ": no command found in bonding_masters."
137 " Use +ifname or -ifname.\n");
141 /* class attribute for bond_masters file. This ends up in /sys/class/net */
142 static CLASS_ATTR(bonding_masters, S_IWUSR | S_IRUGO,
143 bonding_show_bonds, bonding_store_bonds);
145 int bond_create_slave_symlinks(struct net_device *master,
146 struct net_device *slave)
148 char linkname[IFNAMSIZ+7];
151 /* first, create a link from the slave back to the master */
152 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
156 /* next, create a link from the master to the slave */
157 sprintf(linkname, "slave_%s", slave->name);
158 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
164 void bond_destroy_slave_symlinks(struct net_device *master,
165 struct net_device *slave)
167 char linkname[IFNAMSIZ+7];
169 sysfs_remove_link(&(slave->dev.kobj), "master");
170 sprintf(linkname, "slave_%s", slave->name);
171 sysfs_remove_link(&(master->dev.kobj), linkname);
176 * Show the slaves in the current bond.
178 static ssize_t bonding_show_slaves(struct device *d,
179 struct device_attribute *attr, char *buf)
183 struct bonding *bond = to_bond(d);
185 read_lock(&bond->lock);
186 bond_for_each_slave(bond, slave, i) {
187 if (res > (PAGE_SIZE - IFNAMSIZ)) {
188 /* not enough space for another interface name */
189 if ((PAGE_SIZE - res) > 10)
190 res = PAGE_SIZE - 10;
191 res += sprintf(buf + res, "++more++ ");
194 res += sprintf(buf + res, "%s ", slave->dev->name);
196 read_unlock(&bond->lock);
198 buf[res-1] = '\n'; /* eat the leftover space */
203 * Set the slaves in the current bond. The bond interface must be
204 * up for this to succeed.
205 * This function is largely the same flow as bonding_update_bonds().
207 static ssize_t bonding_store_slaves(struct device *d,
208 struct device_attribute *attr,
209 const char *buffer, size_t count)
211 char command[IFNAMSIZ + 1] = { 0, };
213 int i, res, found, ret = count;
216 struct net_device *dev = NULL;
217 struct bonding *bond = to_bond(d);
219 /* Quick sanity check -- is the bond interface up? */
220 if (!(bond->dev->flags & IFF_UP)) {
221 pr_warning(DRV_NAME ": %s: doing slave updates when "
222 "interface is down.\n", bond->dev->name);
225 /* Note: We can't hold bond->lock here, as bond_create grabs it. */
228 return restart_syscall();
230 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
231 ifname = command + 1;
232 if ((strlen(command) <= 1) ||
233 !dev_valid_name(ifname))
236 if (command[0] == '+') {
238 /* Got a slave name in ifname. Is it already in the list? */
241 /* FIXME: get netns from sysfs object */
242 dev = __dev_get_by_name(&init_net, ifname);
245 ": %s: Interface %s does not exist!\n",
246 bond->dev->name, ifname);
251 if (dev->flags & IFF_UP) {
253 ": %s: Error: Unable to enslave %s "
254 "because it is already up.\n",
255 bond->dev->name, dev->name);
260 read_lock(&bond->lock);
261 bond_for_each_slave(bond, slave, i)
262 if (slave->dev == dev) {
264 ": %s: Interface %s is already enslaved!\n",
265 bond->dev->name, ifname);
267 read_unlock(&bond->lock);
270 read_unlock(&bond->lock);
272 pr_info(DRV_NAME ": %s: Adding slave %s.\n",
273 bond->dev->name, ifname);
275 /* If this is the first slave, then we need to set
276 the master's hardware address to be the same as the
278 if (is_zero_ether_addr(bond->dev->dev_addr))
279 memcpy(bond->dev->dev_addr, dev->dev_addr,
282 /* Set the slave's MTU to match the bond */
283 original_mtu = dev->mtu;
284 res = dev_set_mtu(dev, bond->dev->mtu);
290 res = bond_enslave(bond->dev, dev);
291 bond_for_each_slave(bond, slave, i)
292 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
293 slave->original_mtu = original_mtu;
300 if (command[0] == '-') {
303 bond_for_each_slave(bond, slave, i)
304 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
306 original_mtu = slave->original_mtu;
310 pr_info(DRV_NAME ": %s: Removing slave %s\n",
311 bond->dev->name, dev->name);
312 res = bond_release(bond->dev, dev);
317 /* set the slave MTU to the default */
318 dev_set_mtu(dev, original_mtu);
320 pr_err(DRV_NAME ": unable to remove non-existent"
321 " slave %s for bond %s.\n",
322 ifname, bond->dev->name);
329 pr_err(DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
337 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
338 bonding_store_slaves);
341 * Show and set the bonding mode. The bond interface must be down to
344 static ssize_t bonding_show_mode(struct device *d,
345 struct device_attribute *attr, char *buf)
347 struct bonding *bond = to_bond(d);
349 return sprintf(buf, "%s %d\n",
350 bond_mode_tbl[bond->params.mode].modename,
354 static ssize_t bonding_store_mode(struct device *d,
355 struct device_attribute *attr,
356 const char *buf, size_t count)
358 int new_value, ret = count;
359 struct bonding *bond = to_bond(d);
361 if (bond->dev->flags & IFF_UP) {
362 pr_err(DRV_NAME ": unable to update mode of %s"
363 " because interface is up.\n", bond->dev->name);
368 new_value = bond_parse_parm(buf, bond_mode_tbl);
371 ": %s: Ignoring invalid mode value %.*s.\n",
373 (int)strlen(buf) - 1, buf);
377 if (bond->params.mode == BOND_MODE_8023AD)
378 bond_unset_master_3ad_flags(bond);
380 if (bond->params.mode == BOND_MODE_ALB)
381 bond_unset_master_alb_flags(bond);
383 bond->params.mode = new_value;
384 bond_set_mode_ops(bond, bond->params.mode);
385 pr_info(DRV_NAME ": %s: setting mode to %s (%d).\n",
386 bond->dev->name, bond_mode_tbl[new_value].modename,
392 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
393 bonding_show_mode, bonding_store_mode);
396 * Show and set the bonding transmit hash method.
397 * The bond interface must be down to change the xmit hash policy.
399 static ssize_t bonding_show_xmit_hash(struct device *d,
400 struct device_attribute *attr,
403 struct bonding *bond = to_bond(d);
405 return sprintf(buf, "%s %d\n",
406 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
407 bond->params.xmit_policy);
410 static ssize_t bonding_store_xmit_hash(struct device *d,
411 struct device_attribute *attr,
412 const char *buf, size_t count)
414 int new_value, ret = count;
415 struct bonding *bond = to_bond(d);
417 if (bond->dev->flags & IFF_UP) {
419 "%s: Interface is up. Unable to update xmit policy.\n",
425 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
428 ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
430 (int)strlen(buf) - 1, buf);
434 bond->params.xmit_policy = new_value;
435 bond_set_mode_ops(bond, bond->params.mode);
436 pr_info(DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
438 xmit_hashtype_tbl[new_value].modename, new_value);
443 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
444 bonding_show_xmit_hash, bonding_store_xmit_hash);
447 * Show and set arp_validate.
449 static ssize_t bonding_show_arp_validate(struct device *d,
450 struct device_attribute *attr,
453 struct bonding *bond = to_bond(d);
455 return sprintf(buf, "%s %d\n",
456 arp_validate_tbl[bond->params.arp_validate].modename,
457 bond->params.arp_validate);
460 static ssize_t bonding_store_arp_validate(struct device *d,
461 struct device_attribute *attr,
462 const char *buf, size_t count)
465 struct bonding *bond = to_bond(d);
467 new_value = bond_parse_parm(buf, arp_validate_tbl);
470 ": %s: Ignoring invalid arp_validate value %s\n",
471 bond->dev->name, buf);
474 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
476 ": %s: arp_validate only supported in active-backup mode.\n",
480 pr_info(DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
481 bond->dev->name, arp_validate_tbl[new_value].modename,
484 if (!bond->params.arp_validate && new_value)
485 bond_register_arp(bond);
486 else if (bond->params.arp_validate && !new_value)
487 bond_unregister_arp(bond);
489 bond->params.arp_validate = new_value;
494 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
495 bonding_store_arp_validate);
498 * Show and store fail_over_mac. User only allowed to change the
499 * value when there are no slaves.
501 static ssize_t bonding_show_fail_over_mac(struct device *d,
502 struct device_attribute *attr,
505 struct bonding *bond = to_bond(d);
507 return sprintf(buf, "%s %d\n",
508 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
509 bond->params.fail_over_mac);
512 static ssize_t bonding_store_fail_over_mac(struct device *d,
513 struct device_attribute *attr,
514 const char *buf, size_t count)
517 struct bonding *bond = to_bond(d);
519 if (bond->slave_cnt != 0) {
521 ": %s: Can't alter fail_over_mac with slaves in bond.\n",
526 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
529 ": %s: Ignoring invalid fail_over_mac value %s.\n",
530 bond->dev->name, buf);
534 bond->params.fail_over_mac = new_value;
535 pr_info(DRV_NAME ": %s: Setting fail_over_mac to %s (%d).\n",
536 bond->dev->name, fail_over_mac_tbl[new_value].modename,
542 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
543 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
546 * Show and set the arp timer interval. There are two tricky bits
547 * here. First, if ARP monitoring is activated, then we must disable
548 * MII monitoring. Second, if the ARP timer isn't running, we must
551 static ssize_t bonding_show_arp_interval(struct device *d,
552 struct device_attribute *attr,
555 struct bonding *bond = to_bond(d);
557 return sprintf(buf, "%d\n", bond->params.arp_interval);
560 static ssize_t bonding_store_arp_interval(struct device *d,
561 struct device_attribute *attr,
562 const char *buf, size_t count)
564 int new_value, ret = count;
565 struct bonding *bond = to_bond(d);
567 if (sscanf(buf, "%d", &new_value) != 1) {
569 ": %s: no arp_interval value specified.\n",
576 ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
577 bond->dev->name, new_value, INT_MAX);
583 ": %s: Setting ARP monitoring interval to %d.\n",
584 bond->dev->name, new_value);
585 bond->params.arp_interval = new_value;
586 if (bond->params.arp_interval)
587 bond->dev->priv_flags |= IFF_MASTER_ARPMON;
588 if (bond->params.miimon) {
590 ": %s: ARP monitoring cannot be used with MII monitoring. "
591 "%s Disabling MII monitoring.\n",
592 bond->dev->name, bond->dev->name);
593 bond->params.miimon = 0;
594 if (delayed_work_pending(&bond->mii_work)) {
595 cancel_delayed_work(&bond->mii_work);
596 flush_workqueue(bond->wq);
599 if (!bond->params.arp_targets[0]) {
601 ": %s: ARP monitoring has been set up, "
602 "but no ARP targets have been specified.\n",
605 if (bond->dev->flags & IFF_UP) {
606 /* If the interface is up, we may need to fire off
607 * the ARP timer. If the interface is down, the
608 * timer will get fired off when the open function
611 if (!delayed_work_pending(&bond->arp_work)) {
612 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
613 INIT_DELAYED_WORK(&bond->arp_work,
614 bond_activebackup_arp_mon);
616 INIT_DELAYED_WORK(&bond->arp_work,
617 bond_loadbalance_arp_mon);
619 queue_delayed_work(bond->wq, &bond->arp_work, 0);
626 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
627 bonding_show_arp_interval, bonding_store_arp_interval);
630 * Show and set the arp targets.
632 static ssize_t bonding_show_arp_targets(struct device *d,
633 struct device_attribute *attr,
637 struct bonding *bond = to_bond(d);
639 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
640 if (bond->params.arp_targets[i])
641 res += sprintf(buf + res, "%pI4 ",
642 &bond->params.arp_targets[i]);
645 buf[res-1] = '\n'; /* eat the leftover space */
649 static ssize_t bonding_store_arp_targets(struct device *d,
650 struct device_attribute *attr,
651 const char *buf, size_t count)
654 int i = 0, done = 0, ret = count;
655 struct bonding *bond = to_bond(d);
658 targets = bond->params.arp_targets;
659 newtarget = in_aton(buf + 1);
662 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
664 ": %s: invalid ARP target %pI4 specified for addition\n",
665 bond->dev->name, &newtarget);
669 /* look for an empty slot to put the target in, and check for dupes */
670 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
671 if (targets[i] == newtarget) { /* duplicate */
673 ": %s: ARP target %pI4 is already present\n",
674 bond->dev->name, &newtarget);
678 if (targets[i] == 0) {
680 ": %s: adding ARP target %pI4.\n",
681 bond->dev->name, &newtarget);
683 targets[i] = newtarget;
688 ": %s: ARP target table is full!\n",
694 } else if (buf[0] == '-') {
695 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
697 ": %s: invalid ARP target %pI4 specified for removal\n",
698 bond->dev->name, &newtarget);
703 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
704 if (targets[i] == newtarget) {
707 ": %s: removing ARP target %pI4.\n",
708 bond->dev->name, &newtarget);
709 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
710 targets[j] = targets[j+1];
718 ": %s: unable to remove nonexistent ARP target %pI4.\n",
719 bond->dev->name, &newtarget);
724 pr_err(DRV_NAME ": no command found in arp_ip_targets file"
725 " for bond %s. Use +<addr> or -<addr>.\n",
734 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
737 * Show and set the up and down delays. These must be multiples of the
738 * MII monitoring value, and are stored internally as the multiplier.
739 * Thus, we must translate to MS for the real world.
741 static ssize_t bonding_show_downdelay(struct device *d,
742 struct device_attribute *attr,
745 struct bonding *bond = to_bond(d);
747 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
750 static ssize_t bonding_store_downdelay(struct device *d,
751 struct device_attribute *attr,
752 const char *buf, size_t count)
754 int new_value, ret = count;
755 struct bonding *bond = to_bond(d);
757 if (!(bond->params.miimon)) {
759 ": %s: Unable to set down delay as MII monitoring is disabled\n",
765 if (sscanf(buf, "%d", &new_value) != 1) {
767 ": %s: no down delay value specified.\n",
774 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
775 bond->dev->name, new_value, 1, INT_MAX);
779 if ((new_value % bond->params.miimon) != 0) {
781 ": %s: Warning: down delay (%d) is not a "
782 "multiple of miimon (%d), delay rounded "
784 bond->dev->name, new_value,
786 (new_value / bond->params.miimon) *
787 bond->params.miimon);
789 bond->params.downdelay = new_value / bond->params.miimon;
790 pr_info(DRV_NAME ": %s: Setting down delay to %d.\n",
792 bond->params.downdelay * bond->params.miimon);
799 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
800 bonding_show_downdelay, bonding_store_downdelay);
802 static ssize_t bonding_show_updelay(struct device *d,
803 struct device_attribute *attr,
806 struct bonding *bond = to_bond(d);
808 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
812 static ssize_t bonding_store_updelay(struct device *d,
813 struct device_attribute *attr,
814 const char *buf, size_t count)
816 int new_value, ret = count;
817 struct bonding *bond = to_bond(d);
819 if (!(bond->params.miimon)) {
821 ": %s: Unable to set up delay as MII monitoring is disabled\n",
827 if (sscanf(buf, "%d", &new_value) != 1) {
829 ": %s: no up delay value specified.\n",
836 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
837 bond->dev->name, new_value, 1, INT_MAX);
841 if ((new_value % bond->params.miimon) != 0) {
843 ": %s: Warning: up delay (%d) is not a "
844 "multiple of miimon (%d), updelay rounded "
846 bond->dev->name, new_value,
848 (new_value / bond->params.miimon) *
849 bond->params.miimon);
851 bond->params.updelay = new_value / bond->params.miimon;
852 pr_info(DRV_NAME ": %s: Setting up delay to %d.\n",
853 bond->dev->name, bond->params.updelay * bond->params.miimon);
860 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
861 bonding_show_updelay, bonding_store_updelay);
864 * Show and set the LACP interval. Interface must be down, and the mode
865 * must be set to 802.3ad mode.
867 static ssize_t bonding_show_lacp(struct device *d,
868 struct device_attribute *attr,
871 struct bonding *bond = to_bond(d);
873 return sprintf(buf, "%s %d\n",
874 bond_lacp_tbl[bond->params.lacp_fast].modename,
875 bond->params.lacp_fast);
878 static ssize_t bonding_store_lacp(struct device *d,
879 struct device_attribute *attr,
880 const char *buf, size_t count)
882 int new_value, ret = count;
883 struct bonding *bond = to_bond(d);
885 if (bond->dev->flags & IFF_UP) {
887 ": %s: Unable to update LACP rate because interface is up.\n",
893 if (bond->params.mode != BOND_MODE_8023AD) {
895 ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
901 new_value = bond_parse_parm(buf, bond_lacp_tbl);
903 if ((new_value == 1) || (new_value == 0)) {
904 bond->params.lacp_fast = new_value;
905 pr_info(DRV_NAME ": %s: Setting LACP rate to %s (%d).\n",
906 bond->dev->name, bond_lacp_tbl[new_value].modename,
910 ": %s: Ignoring invalid LACP rate value %.*s.\n",
911 bond->dev->name, (int)strlen(buf) - 1, buf);
917 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
918 bonding_show_lacp, bonding_store_lacp);
920 static ssize_t bonding_show_ad_select(struct device *d,
921 struct device_attribute *attr,
924 struct bonding *bond = to_bond(d);
926 return sprintf(buf, "%s %d\n",
927 ad_select_tbl[bond->params.ad_select].modename,
928 bond->params.ad_select);
932 static ssize_t bonding_store_ad_select(struct device *d,
933 struct device_attribute *attr,
934 const char *buf, size_t count)
936 int new_value, ret = count;
937 struct bonding *bond = to_bond(d);
939 if (bond->dev->flags & IFF_UP) {
941 ": %s: Unable to update ad_select because interface "
942 "is up.\n", bond->dev->name);
947 new_value = bond_parse_parm(buf, ad_select_tbl);
949 if (new_value != -1) {
950 bond->params.ad_select = new_value;
952 ": %s: Setting ad_select to %s (%d).\n",
953 bond->dev->name, ad_select_tbl[new_value].modename,
957 ": %s: Ignoring invalid ad_select value %.*s.\n",
958 bond->dev->name, (int)strlen(buf) - 1, buf);
964 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
965 bonding_show_ad_select, bonding_store_ad_select);
968 * Show and set the number of grat ARP to send after a failover event.
970 static ssize_t bonding_show_n_grat_arp(struct device *d,
971 struct device_attribute *attr,
974 struct bonding *bond = to_bond(d);
976 return sprintf(buf, "%d\n", bond->params.num_grat_arp);
979 static ssize_t bonding_store_n_grat_arp(struct device *d,
980 struct device_attribute *attr,
981 const char *buf, size_t count)
983 int new_value, ret = count;
984 struct bonding *bond = to_bond(d);
986 if (sscanf(buf, "%d", &new_value) != 1) {
988 ": %s: no num_grat_arp value specified.\n",
993 if (new_value < 0 || new_value > 255) {
995 ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
996 bond->dev->name, new_value);
1000 bond->params.num_grat_arp = new_value;
1005 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
1006 bonding_show_n_grat_arp, bonding_store_n_grat_arp);
1009 * Show and set the number of unsolicited NA's to send after a failover event.
1011 static ssize_t bonding_show_n_unsol_na(struct device *d,
1012 struct device_attribute *attr,
1015 struct bonding *bond = to_bond(d);
1017 return sprintf(buf, "%d\n", bond->params.num_unsol_na);
1020 static ssize_t bonding_store_n_unsol_na(struct device *d,
1021 struct device_attribute *attr,
1022 const char *buf, size_t count)
1024 int new_value, ret = count;
1025 struct bonding *bond = to_bond(d);
1027 if (sscanf(buf, "%d", &new_value) != 1) {
1029 ": %s: no num_unsol_na value specified.\n",
1035 if (new_value < 0 || new_value > 255) {
1037 ": %s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
1038 bond->dev->name, new_value);
1042 bond->params.num_unsol_na = new_value;
1046 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
1047 bonding_show_n_unsol_na, bonding_store_n_unsol_na);
1050 * Show and set the MII monitor interval. There are two tricky bits
1051 * here. First, if MII monitoring is activated, then we must disable
1052 * ARP monitoring. Second, if the timer isn't running, we must
1055 static ssize_t bonding_show_miimon(struct device *d,
1056 struct device_attribute *attr,
1059 struct bonding *bond = to_bond(d);
1061 return sprintf(buf, "%d\n", bond->params.miimon);
1064 static ssize_t bonding_store_miimon(struct device *d,
1065 struct device_attribute *attr,
1066 const char *buf, size_t count)
1068 int new_value, ret = count;
1069 struct bonding *bond = to_bond(d);
1071 if (sscanf(buf, "%d", &new_value) != 1) {
1073 ": %s: no miimon value specified.\n",
1078 if (new_value < 0) {
1080 ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1081 bond->dev->name, new_value, 1, INT_MAX);
1086 ": %s: Setting MII monitoring interval to %d.\n",
1087 bond->dev->name, new_value);
1088 bond->params.miimon = new_value;
1089 if (bond->params.updelay)
1091 ": %s: Note: Updating updelay (to %d) "
1092 "since it is a multiple of the miimon value.\n",
1094 bond->params.updelay * bond->params.miimon);
1095 if (bond->params.downdelay)
1097 ": %s: Note: Updating downdelay (to %d) "
1098 "since it is a multiple of the miimon value.\n",
1100 bond->params.downdelay * bond->params.miimon);
1101 if (bond->params.arp_interval) {
1103 ": %s: MII monitoring cannot be used with "
1104 "ARP monitoring. Disabling ARP monitoring...\n",
1106 bond->params.arp_interval = 0;
1107 bond->dev->priv_flags &= ~IFF_MASTER_ARPMON;
1108 if (bond->params.arp_validate) {
1109 bond_unregister_arp(bond);
1110 bond->params.arp_validate =
1111 BOND_ARP_VALIDATE_NONE;
1113 if (delayed_work_pending(&bond->arp_work)) {
1114 cancel_delayed_work(&bond->arp_work);
1115 flush_workqueue(bond->wq);
1119 if (bond->dev->flags & IFF_UP) {
1120 /* If the interface is up, we may need to fire off
1121 * the MII timer. If the interface is down, the
1122 * timer will get fired off when the open function
1125 if (!delayed_work_pending(&bond->mii_work)) {
1126 INIT_DELAYED_WORK(&bond->mii_work,
1128 queue_delayed_work(bond->wq,
1129 &bond->mii_work, 0);
1136 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1137 bonding_show_miimon, bonding_store_miimon);
1140 * Show and set the primary slave. The store function is much
1141 * simpler than bonding_store_slaves function because it only needs to
1142 * handle one interface name.
1143 * The bond must be a mode that supports a primary for this be
1146 static ssize_t bonding_show_primary(struct device *d,
1147 struct device_attribute *attr,
1151 struct bonding *bond = to_bond(d);
1153 if (bond->primary_slave)
1154 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1159 static ssize_t bonding_store_primary(struct device *d,
1160 struct device_attribute *attr,
1161 const char *buf, size_t count)
1164 struct slave *slave;
1165 struct bonding *bond = to_bond(d);
1167 if (!rtnl_trylock())
1168 return restart_syscall();
1169 read_lock(&bond->lock);
1170 write_lock_bh(&bond->curr_slave_lock);
1172 if (!USES_PRIMARY(bond->params.mode)) {
1174 ": %s: Unable to set primary slave; %s is in mode %d\n",
1175 bond->dev->name, bond->dev->name, bond->params.mode);
1177 bond_for_each_slave(bond, slave, i) {
1179 (slave->dev->name, buf,
1180 strlen(slave->dev->name)) == 0) {
1182 ": %s: Setting %s as primary slave.\n",
1183 bond->dev->name, slave->dev->name);
1184 bond->primary_slave = slave;
1185 bond_select_active_slave(bond);
1190 /* if we got here, then we didn't match the name of any slave */
1192 if (strlen(buf) == 0 || buf[0] == '\n') {
1194 ": %s: Setting primary slave to None.\n",
1196 bond->primary_slave = NULL;
1197 bond_select_active_slave(bond);
1200 ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1201 bond->dev->name, (int)strlen(buf) - 1, buf);
1205 write_unlock_bh(&bond->curr_slave_lock);
1206 read_unlock(&bond->lock);
1211 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1212 bonding_show_primary, bonding_store_primary);
1215 * Show and set the use_carrier flag.
1217 static ssize_t bonding_show_carrier(struct device *d,
1218 struct device_attribute *attr,
1221 struct bonding *bond = to_bond(d);
1223 return sprintf(buf, "%d\n", bond->params.use_carrier);
1226 static ssize_t bonding_store_carrier(struct device *d,
1227 struct device_attribute *attr,
1228 const char *buf, size_t count)
1230 int new_value, ret = count;
1231 struct bonding *bond = to_bond(d);
1234 if (sscanf(buf, "%d", &new_value) != 1) {
1236 ": %s: no use_carrier value specified.\n",
1241 if ((new_value == 0) || (new_value == 1)) {
1242 bond->params.use_carrier = new_value;
1243 pr_info(DRV_NAME ": %s: Setting use_carrier to %d.\n",
1244 bond->dev->name, new_value);
1247 ": %s: Ignoring invalid use_carrier value %d.\n",
1248 bond->dev->name, new_value);
1253 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1254 bonding_show_carrier, bonding_store_carrier);
1258 * Show and set currently active_slave.
1260 static ssize_t bonding_show_active_slave(struct device *d,
1261 struct device_attribute *attr,
1265 struct bonding *bond = to_bond(d);
1268 read_lock(&bond->curr_slave_lock);
1269 curr = bond->curr_active_slave;
1270 read_unlock(&bond->curr_slave_lock);
1272 if (USES_PRIMARY(bond->params.mode) && curr)
1273 count = sprintf(buf, "%s\n", curr->dev->name);
1277 static ssize_t bonding_store_active_slave(struct device *d,
1278 struct device_attribute *attr,
1279 const char *buf, size_t count)
1282 struct slave *slave;
1283 struct slave *old_active = NULL;
1284 struct slave *new_active = NULL;
1285 struct bonding *bond = to_bond(d);
1287 if (!rtnl_trylock())
1288 return restart_syscall();
1289 read_lock(&bond->lock);
1290 write_lock_bh(&bond->curr_slave_lock);
1292 if (!USES_PRIMARY(bond->params.mode))
1293 pr_info(DRV_NAME ": %s: Unable to change active slave;"
1294 " %s is in mode %d\n",
1295 bond->dev->name, bond->dev->name, bond->params.mode);
1297 bond_for_each_slave(bond, slave, i) {
1299 (slave->dev->name, buf,
1300 strlen(slave->dev->name)) == 0) {
1301 old_active = bond->curr_active_slave;
1303 if (new_active == old_active) {
1306 ": %s: %s is already the current active slave.\n",
1307 bond->dev->name, slave->dev->name);
1313 (new_active->link == BOND_LINK_UP) &&
1314 IS_UP(new_active->dev)) {
1316 ": %s: Setting %s as active slave.\n",
1317 bond->dev->name, slave->dev->name);
1318 bond_change_active_slave(bond, new_active);
1322 ": %s: Could not set %s as active slave; "
1323 "either %s is down or the link is down.\n",
1324 bond->dev->name, slave->dev->name,
1332 /* if we got here, then we didn't match the name of any slave */
1334 if (strlen(buf) == 0 || buf[0] == '\n') {
1336 ": %s: Setting active slave to None.\n",
1338 bond->primary_slave = NULL;
1339 bond_select_active_slave(bond);
1341 pr_info(DRV_NAME ": %s: Unable to set %.*s"
1342 " as active slave as it is not a slave.\n",
1343 bond->dev->name, (int)strlen(buf) - 1, buf);
1347 write_unlock_bh(&bond->curr_slave_lock);
1348 read_unlock(&bond->lock);
1354 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1355 bonding_show_active_slave, bonding_store_active_slave);
1359 * Show link status of the bond interface.
1361 static ssize_t bonding_show_mii_status(struct device *d,
1362 struct device_attribute *attr,
1366 struct bonding *bond = to_bond(d);
1368 read_lock(&bond->curr_slave_lock);
1369 curr = bond->curr_active_slave;
1370 read_unlock(&bond->curr_slave_lock);
1372 return sprintf(buf, "%s\n", curr ? "up" : "down");
1374 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1378 * Show current 802.3ad aggregator ID.
1380 static ssize_t bonding_show_ad_aggregator(struct device *d,
1381 struct device_attribute *attr,
1385 struct bonding *bond = to_bond(d);
1387 if (bond->params.mode == BOND_MODE_8023AD) {
1388 struct ad_info ad_info;
1389 count = sprintf(buf, "%d\n",
1390 (bond_3ad_get_active_agg_info(bond, &ad_info))
1391 ? 0 : ad_info.aggregator_id);
1396 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1400 * Show number of active 802.3ad ports.
1402 static ssize_t bonding_show_ad_num_ports(struct device *d,
1403 struct device_attribute *attr,
1407 struct bonding *bond = to_bond(d);
1409 if (bond->params.mode == BOND_MODE_8023AD) {
1410 struct ad_info ad_info;
1411 count = sprintf(buf, "%d\n",
1412 (bond_3ad_get_active_agg_info(bond, &ad_info))
1413 ? 0 : ad_info.ports);
1418 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1422 * Show current 802.3ad actor key.
1424 static ssize_t bonding_show_ad_actor_key(struct device *d,
1425 struct device_attribute *attr,
1429 struct bonding *bond = to_bond(d);
1431 if (bond->params.mode == BOND_MODE_8023AD) {
1432 struct ad_info ad_info;
1433 count = sprintf(buf, "%d\n",
1434 (bond_3ad_get_active_agg_info(bond, &ad_info))
1435 ? 0 : ad_info.actor_key);
1440 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1444 * Show current 802.3ad partner key.
1446 static ssize_t bonding_show_ad_partner_key(struct device *d,
1447 struct device_attribute *attr,
1451 struct bonding *bond = to_bond(d);
1453 if (bond->params.mode == BOND_MODE_8023AD) {
1454 struct ad_info ad_info;
1455 count = sprintf(buf, "%d\n",
1456 (bond_3ad_get_active_agg_info(bond, &ad_info))
1457 ? 0 : ad_info.partner_key);
1462 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1466 * Show current 802.3ad partner mac.
1468 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1469 struct device_attribute *attr,
1473 struct bonding *bond = to_bond(d);
1475 if (bond->params.mode == BOND_MODE_8023AD) {
1476 struct ad_info ad_info;
1477 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1478 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1483 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1487 static struct attribute *per_bond_attrs[] = {
1488 &dev_attr_slaves.attr,
1489 &dev_attr_mode.attr,
1490 &dev_attr_fail_over_mac.attr,
1491 &dev_attr_arp_validate.attr,
1492 &dev_attr_arp_interval.attr,
1493 &dev_attr_arp_ip_target.attr,
1494 &dev_attr_downdelay.attr,
1495 &dev_attr_updelay.attr,
1496 &dev_attr_lacp_rate.attr,
1497 &dev_attr_ad_select.attr,
1498 &dev_attr_xmit_hash_policy.attr,
1499 &dev_attr_num_grat_arp.attr,
1500 &dev_attr_num_unsol_na.attr,
1501 &dev_attr_miimon.attr,
1502 &dev_attr_primary.attr,
1503 &dev_attr_use_carrier.attr,
1504 &dev_attr_active_slave.attr,
1505 &dev_attr_mii_status.attr,
1506 &dev_attr_ad_aggregator.attr,
1507 &dev_attr_ad_num_ports.attr,
1508 &dev_attr_ad_actor_key.attr,
1509 &dev_attr_ad_partner_key.attr,
1510 &dev_attr_ad_partner_mac.attr,
1514 static struct attribute_group bonding_group = {
1516 .attrs = per_bond_attrs,
1520 * Initialize sysfs. This sets up the bonding_masters file in
1523 int bond_create_sysfs(void)
1527 ret = netdev_class_create_file(&class_attr_bonding_masters);
1529 * Permit multiple loads of the module by ignoring failures to
1530 * create the bonding_masters sysfs file. Bonding devices
1531 * created by second or subsequent loads of the module will
1532 * not be listed in, or controllable by, bonding_masters, but
1533 * will have the usual "bonding" sysfs directory.
1535 * This is done to preserve backwards compatibility for
1536 * initscripts/sysconfig, which load bonding multiple times to
1537 * configure multiple bonding devices.
1539 if (ret == -EEXIST) {
1540 /* Is someone being kinky and naming a device bonding_master? */
1541 if (__dev_get_by_name(&init_net,
1542 class_attr_bonding_masters.attr.name))
1543 pr_err("network device named %s already "
1545 class_attr_bonding_masters.attr.name);
1554 * Remove /sys/class/net/bonding_masters.
1556 void bond_destroy_sysfs(void)
1558 netdev_class_remove_file(&class_attr_bonding_masters);
1562 * Initialize sysfs for each bond. This sets up and registers
1563 * the 'bondctl' directory for each individual bond under /sys/class/net.
1565 int bond_create_sysfs_entry(struct bonding *bond)
1567 struct net_device *dev = bond->dev;
1570 err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1572 pr_emerg("eek! didn't create group!\n");
1577 * Remove sysfs entries for each bond.
1579 void bond_destroy_sysfs_entry(struct bonding *bond)
1581 struct net_device *dev = bond->dev;
1583 sysfs_remove_group(&(dev->dev.kobj), &bonding_group);