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Linux 2.6.33-rc8
[linux-2.6/lguest.git] / drivers / net / bonding / bond_sysfs.c
blob5acd557cea9ba7ab4c4cbcb36323dccee02bff20
1 /*
2 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
3 *
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.
8 *
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
12 * for more details.
13 *
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.
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 */
22
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
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>
30 #include <linux/fs.h>
31 #include <linux/types.h>
32 #include <linux/string.h>
33 #include <linux/netdevice.h>
34 #include <linux/inetdevice.h>
35 #include <linux/in.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>
44
45 #include "bonding.h"
46
47 #define to_dev(obj) container_of(obj, struct device, kobj)
48 #define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
49
50 /*
51 * "show" function for the bond_masters attribute.
52 * The class parameter is ignored.
53 */
54 static ssize_t bonding_show_bonds(struct class *cls, char *buf)
55 {
56 struct net *net = current->nsproxy->net_ns;
57 struct bond_net *bn = net_generic(net, bond_net_id);
58 int res = 0;
59 struct bonding *bond;
60
61 rtnl_lock();
62
63 list_for_each_entry(bond, &bn->dev_list, bond_list) {
64 if (res > (PAGE_SIZE - IFNAMSIZ)) {
65 /* not enough space for another interface name */
66 if ((PAGE_SIZE - res) > 10)
67 res = PAGE_SIZE - 10;
68 res += sprintf(buf + res, "++more++ ");
69 break;
70 }
71 res += sprintf(buf + res, "%s ", bond->dev->name);
72 }
73 if (res)
74 buf[res-1] = '\n'; /* eat the leftover space */
75
76 rtnl_unlock();
77 return res;
78 }
79
80 static struct net_device *bond_get_by_name(struct net *net, const char *ifname)
81 {
82 struct bond_net *bn = net_generic(net, bond_net_id);
83 struct bonding *bond;
84
85 list_for_each_entry(bond, &bn->dev_list, bond_list) {
86 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
87 return bond->dev;
88 }
89 return NULL;
90 }
91
92 /*
93 * "store" function for the bond_masters attribute. This is what
94 * creates and deletes entire bonds.
95 *
96 * The class parameter is ignored.
97 *
98 */
99
100 static ssize_t bonding_store_bonds(struct class *cls,
101 const char *buffer, size_t count)
102 {
103 struct net *net = current->nsproxy->net_ns;
104 char command[IFNAMSIZ + 1] = {0, };
105 char *ifname;
106 int rv, res = count;
107
108 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
109 ifname = command + 1;
110 if ((strlen(command) <= 1) ||
111 !dev_valid_name(ifname))
112 goto err_no_cmd;
113
114 if (command[0] == '+') {
115 pr_info("%s is being created...\n", ifname);
116 rv = bond_create(net, ifname);
117 if (rv) {
118 pr_info("Bond creation failed.\n");
119 res = rv;
120 }
121 } else if (command[0] == '-') {
122 struct net_device *bond_dev;
123
124 rtnl_lock();
125 bond_dev = bond_get_by_name(net, ifname);
126 if (bond_dev) {
127 pr_info("%s is being deleted...\n", ifname);
128 unregister_netdevice(bond_dev);
129 } else {
130 pr_err("unable to delete non-existent %s\n", ifname);
131 res = -ENODEV;
132 }
133 rtnl_unlock();
134 } else
135 goto err_no_cmd;
136
137 /* Always return either count or an error. If you return 0, you'll
138 * get called forever, which is bad.
139 */
140 return res;
141
142 err_no_cmd:
143 pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
144 return -EPERM;
145 }
146
147 /* class attribute for bond_masters file. This ends up in /sys/class/net */
148 static CLASS_ATTR(bonding_masters, S_IWUSR | S_IRUGO,
149 bonding_show_bonds, bonding_store_bonds);
150
151 int bond_create_slave_symlinks(struct net_device *master,
152 struct net_device *slave)
153 {
154 char linkname[IFNAMSIZ+7];
155 int ret = 0;
156
157 /* first, create a link from the slave back to the master */
158 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
159 "master");
160 if (ret)
161 return ret;
162 /* next, create a link from the master to the slave */
163 sprintf(linkname, "slave_%s", slave->name);
164 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
165 linkname);
166 return ret;
167
168 }
169
170 void bond_destroy_slave_symlinks(struct net_device *master,
171 struct net_device *slave)
172 {
173 char linkname[IFNAMSIZ+7];
174
175 sysfs_remove_link(&(slave->dev.kobj), "master");
176 sprintf(linkname, "slave_%s", slave->name);
177 sysfs_remove_link(&(master->dev.kobj), linkname);
178 }
179
180
181 /*
182 * Show the slaves in the current bond.
183 */
184 static ssize_t bonding_show_slaves(struct device *d,
185 struct device_attribute *attr, char *buf)
186 {
187 struct slave *slave;
188 int i, res = 0;
189 struct bonding *bond = to_bond(d);
190
191 read_lock(&bond->lock);
192 bond_for_each_slave(bond, slave, i) {
193 if (res > (PAGE_SIZE - IFNAMSIZ)) {
194 /* not enough space for another interface name */
195 if ((PAGE_SIZE - res) > 10)
196 res = PAGE_SIZE - 10;
197 res += sprintf(buf + res, "++more++ ");
198 break;
199 }
200 res += sprintf(buf + res, "%s ", slave->dev->name);
201 }
202 read_unlock(&bond->lock);
203 if (res)
204 buf[res-1] = '\n'; /* eat the leftover space */
205 return res;
206 }
207
208 /*
209 * Set the slaves in the current bond. The bond interface must be
210 * up for this to succeed.
211 * This function is largely the same flow as bonding_update_bonds().
212 */
213 static ssize_t bonding_store_slaves(struct device *d,
214 struct device_attribute *attr,
215 const char *buffer, size_t count)
216 {
217 char command[IFNAMSIZ + 1] = { 0, };
218 char *ifname;
219 int i, res, found, ret = count;
220 u32 original_mtu;
221 struct slave *slave;
222 struct net_device *dev = NULL;
223 struct bonding *bond = to_bond(d);
224
225 /* Quick sanity check -- is the bond interface up? */
226 if (!(bond->dev->flags & IFF_UP)) {
227 pr_warning("%s: doing slave updates when interface is down.\n",
228 bond->dev->name);
229 }
230
231 /* Note: We can't hold bond->lock here, as bond_create grabs it. */
232
233 if (!rtnl_trylock())
234 return restart_syscall();
235
236 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
237 ifname = command + 1;
238 if ((strlen(command) <= 1) ||
239 !dev_valid_name(ifname))
240 goto err_no_cmd;
241
242 if (command[0] == '+') {
243
244 /* Got a slave name in ifname. Is it already in the list? */
245 found = 0;
246
247 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
248 if (!dev) {
249 pr_info("%s: Interface %s does not exist!\n",
250 bond->dev->name, ifname);
251 ret = -ENODEV;
252 goto out;
253 }
254
255 if (dev->flags & IFF_UP) {
256 pr_err("%s: Error: Unable to enslave %s because it is already up.\n",
257 bond->dev->name, dev->name);
258 ret = -EPERM;
259 goto out;
260 }
261
262 read_lock(&bond->lock);
263 bond_for_each_slave(bond, slave, i)
264 if (slave->dev == dev) {
265 pr_err("%s: Interface %s is already enslaved!\n",
266 bond->dev->name, ifname);
267 ret = -EPERM;
268 read_unlock(&bond->lock);
269 goto out;
270 }
271 read_unlock(&bond->lock);
272
273 pr_info("%s: Adding slave %s.\n", bond->dev->name, ifname);
274
275 /* If this is the first slave, then we need to set
276 the master's hardware address to be the same as the
277 slave's. */
278 if (is_zero_ether_addr(bond->dev->dev_addr))
279 memcpy(bond->dev->dev_addr, dev->dev_addr,
280 dev->addr_len);
281
282 /* Set the slave's MTU to match the bond */
283 original_mtu = dev->mtu;
284 res = dev_set_mtu(dev, bond->dev->mtu);
285 if (res) {
286 ret = res;
287 goto out;
288 }
289
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;
294 if (res)
295 ret = res;
296
297 goto out;
298 }
299
300 if (command[0] == '-') {
301 dev = NULL;
302 original_mtu = 0;
303 bond_for_each_slave(bond, slave, i)
304 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
305 dev = slave->dev;
306 original_mtu = slave->original_mtu;
307 break;
308 }
309 if (dev) {
310 pr_info("%s: Removing slave %s\n",
311 bond->dev->name, dev->name);
312 res = bond_release(bond->dev, dev);
313 if (res) {
314 ret = res;
315 goto out;
316 }
317 /* set the slave MTU to the default */
318 dev_set_mtu(dev, original_mtu);
319 } else {
320 pr_err("unable to remove non-existent slave %s for bond %s.\n",
321 ifname, bond->dev->name);
322 ret = -ENODEV;
323 }
324 goto out;
325 }
326
327 err_no_cmd:
328 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
329 bond->dev->name);
330 ret = -EPERM;
331
332 out:
333 rtnl_unlock();
334 return ret;
335 }
336
337 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
338 bonding_store_slaves);
339
340 /*
341 * Show and set the bonding mode. The bond interface must be down to
342 * change the mode.
343 */
344 static ssize_t bonding_show_mode(struct device *d,
345 struct device_attribute *attr, char *buf)
346 {
347 struct bonding *bond = to_bond(d);
348
349 return sprintf(buf, "%s %d\n",
350 bond_mode_tbl[bond->params.mode].modename,
351 bond->params.mode);
352 }
353
354 static ssize_t bonding_store_mode(struct device *d,
355 struct device_attribute *attr,
356 const char *buf, size_t count)
357 {
358 int new_value, ret = count;
359 struct bonding *bond = to_bond(d);
360
361 if (bond->dev->flags & IFF_UP) {
362 pr_err("unable to update mode of %s because interface is up.\n",
363 bond->dev->name);
364 ret = -EPERM;
365 goto out;
366 }
367
368 new_value = bond_parse_parm(buf, bond_mode_tbl);
369 if (new_value < 0) {
370 pr_err("%s: Ignoring invalid mode value %.*s.\n",
371 bond->dev->name, (int)strlen(buf) - 1, buf);
372 ret = -EINVAL;
373 goto out;
374 } else {
375 if (bond->params.mode == BOND_MODE_8023AD)
376 bond_unset_master_3ad_flags(bond);
377
378 if (bond->params.mode == BOND_MODE_ALB)
379 bond_unset_master_alb_flags(bond);
380
381 bond->params.mode = new_value;
382 bond_set_mode_ops(bond, bond->params.mode);
383 pr_info("%s: setting mode to %s (%d).\n",
384 bond->dev->name, bond_mode_tbl[new_value].modename,
385 new_value);
386 }
387 out:
388 return ret;
389 }
390 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
391 bonding_show_mode, bonding_store_mode);
392
393 /*
394 * Show and set the bonding transmit hash method.
395 * The bond interface must be down to change the xmit hash policy.
396 */
397 static ssize_t bonding_show_xmit_hash(struct device *d,
398 struct device_attribute *attr,
399 char *buf)
400 {
401 struct bonding *bond = to_bond(d);
402
403 return sprintf(buf, "%s %d\n",
404 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
405 bond->params.xmit_policy);
406 }
407
408 static ssize_t bonding_store_xmit_hash(struct device *d,
409 struct device_attribute *attr,
410 const char *buf, size_t count)
411 {
412 int new_value, ret = count;
413 struct bonding *bond = to_bond(d);
414
415 if (bond->dev->flags & IFF_UP) {
416 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
417 bond->dev->name);
418 ret = -EPERM;
419 goto out;
420 }
421
422 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
423 if (new_value < 0) {
424 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
425 bond->dev->name,
426 (int)strlen(buf) - 1, buf);
427 ret = -EINVAL;
428 goto out;
429 } else {
430 bond->params.xmit_policy = new_value;
431 bond_set_mode_ops(bond, bond->params.mode);
432 pr_info("%s: setting xmit hash policy to %s (%d).\n",
433 bond->dev->name,
434 xmit_hashtype_tbl[new_value].modename, new_value);
435 }
436 out:
437 return ret;
438 }
439 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
440 bonding_show_xmit_hash, bonding_store_xmit_hash);
441
442 /*
443 * Show and set arp_validate.
444 */
445 static ssize_t bonding_show_arp_validate(struct device *d,
446 struct device_attribute *attr,
447 char *buf)
448 {
449 struct bonding *bond = to_bond(d);
450
451 return sprintf(buf, "%s %d\n",
452 arp_validate_tbl[bond->params.arp_validate].modename,
453 bond->params.arp_validate);
454 }
455
456 static ssize_t bonding_store_arp_validate(struct device *d,
457 struct device_attribute *attr,
458 const char *buf, size_t count)
459 {
460 int new_value;
461 struct bonding *bond = to_bond(d);
462
463 new_value = bond_parse_parm(buf, arp_validate_tbl);
464 if (new_value < 0) {
465 pr_err("%s: Ignoring invalid arp_validate value %s\n",
466 bond->dev->name, buf);
467 return -EINVAL;
468 }
469 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
470 pr_err("%s: arp_validate only supported in active-backup mode.\n",
471 bond->dev->name);
472 return -EINVAL;
473 }
474 pr_info("%s: setting arp_validate to %s (%d).\n",
475 bond->dev->name, arp_validate_tbl[new_value].modename,
476 new_value);
477
478 if (!bond->params.arp_validate && new_value)
479 bond_register_arp(bond);
480 else if (bond->params.arp_validate && !new_value)
481 bond_unregister_arp(bond);
482
483 bond->params.arp_validate = new_value;
484
485 return count;
486 }
487
488 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
489 bonding_store_arp_validate);
490
491 /*
492 * Show and store fail_over_mac. User only allowed to change the
493 * value when there are no slaves.
494 */
495 static ssize_t bonding_show_fail_over_mac(struct device *d,
496 struct device_attribute *attr,
497 char *buf)
498 {
499 struct bonding *bond = to_bond(d);
500
501 return sprintf(buf, "%s %d\n",
502 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
503 bond->params.fail_over_mac);
504 }
505
506 static ssize_t bonding_store_fail_over_mac(struct device *d,
507 struct device_attribute *attr,
508 const char *buf, size_t count)
509 {
510 int new_value;
511 struct bonding *bond = to_bond(d);
512
513 if (bond->slave_cnt != 0) {
514 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
515 bond->dev->name);
516 return -EPERM;
517 }
518
519 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
520 if (new_value < 0) {
521 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
522 bond->dev->name, buf);
523 return -EINVAL;
524 }
525
526 bond->params.fail_over_mac = new_value;
527 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
528 bond->dev->name, fail_over_mac_tbl[new_value].modename,
529 new_value);
530
531 return count;
532 }
533
534 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
535 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
536
537 /*
538 * Show and set the arp timer interval. There are two tricky bits
539 * here. First, if ARP monitoring is activated, then we must disable
540 * MII monitoring. Second, if the ARP timer isn't running, we must
541 * start it.
542 */
543 static ssize_t bonding_show_arp_interval(struct device *d,
544 struct device_attribute *attr,
545 char *buf)
546 {
547 struct bonding *bond = to_bond(d);
548
549 return sprintf(buf, "%d\n", bond->params.arp_interval);
550 }
551
552 static ssize_t bonding_store_arp_interval(struct device *d,
553 struct device_attribute *attr,
554 const char *buf, size_t count)
555 {
556 int new_value, ret = count;
557 struct bonding *bond = to_bond(d);
558
559 if (sscanf(buf, "%d", &new_value) != 1) {
560 pr_err("%s: no arp_interval value specified.\n",
561 bond->dev->name);
562 ret = -EINVAL;
563 goto out;
564 }
565 if (new_value < 0) {
566 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
567 bond->dev->name, new_value, INT_MAX);
568 ret = -EINVAL;
569 goto out;
570 }
571
572 pr_info("%s: Setting ARP monitoring interval to %d.\n",
573 bond->dev->name, new_value);
574 bond->params.arp_interval = new_value;
575 if (bond->params.arp_interval)
576 bond->dev->priv_flags |= IFF_MASTER_ARPMON;
577 if (bond->params.miimon) {
578 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
579 bond->dev->name, bond->dev->name);
580 bond->params.miimon = 0;
581 if (delayed_work_pending(&bond->mii_work)) {
582 cancel_delayed_work(&bond->mii_work);
583 flush_workqueue(bond->wq);
584 }
585 }
586 if (!bond->params.arp_targets[0]) {
587 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
588 bond->dev->name);
589 }
590 if (bond->dev->flags & IFF_UP) {
591 /* If the interface is up, we may need to fire off
592 * the ARP timer. If the interface is down, the
593 * timer will get fired off when the open function
594 * is called.
595 */
596 if (!delayed_work_pending(&bond->arp_work)) {
597 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
598 INIT_DELAYED_WORK(&bond->arp_work,
599 bond_activebackup_arp_mon);
600 else
601 INIT_DELAYED_WORK(&bond->arp_work,
602 bond_loadbalance_arp_mon);
603
604 queue_delayed_work(bond->wq, &bond->arp_work, 0);
605 }
606 }
607
608 out:
609 return ret;
610 }
611 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
612 bonding_show_arp_interval, bonding_store_arp_interval);
613
614 /*
615 * Show and set the arp targets.
616 */
617 static ssize_t bonding_show_arp_targets(struct device *d,
618 struct device_attribute *attr,
619 char *buf)
620 {
621 int i, res = 0;
622 struct bonding *bond = to_bond(d);
623
624 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
625 if (bond->params.arp_targets[i])
626 res += sprintf(buf + res, "%pI4 ",
627 &bond->params.arp_targets[i]);
628 }
629 if (res)
630 buf[res-1] = '\n'; /* eat the leftover space */
631 return res;
632 }
633
634 static ssize_t bonding_store_arp_targets(struct device *d,
635 struct device_attribute *attr,
636 const char *buf, size_t count)
637 {
638 __be32 newtarget;
639 int i = 0, done = 0, ret = count;
640 struct bonding *bond = to_bond(d);
641 __be32 *targets;
642
643 targets = bond->params.arp_targets;
644 newtarget = in_aton(buf + 1);
645 /* look for adds */
646 if (buf[0] == '+') {
647 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
648 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
649 bond->dev->name, &newtarget);
650 ret = -EINVAL;
651 goto out;
652 }
653 /* look for an empty slot to put the target in, and check for dupes */
654 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
655 if (targets[i] == newtarget) { /* duplicate */
656 pr_err("%s: ARP target %pI4 is already present\n",
657 bond->dev->name, &newtarget);
658 ret = -EINVAL;
659 goto out;
660 }
661 if (targets[i] == 0) {
662 pr_info("%s: adding ARP target %pI4.\n",
663 bond->dev->name, &newtarget);
664 done = 1;
665 targets[i] = newtarget;
666 }
667 }
668 if (!done) {
669 pr_err("%s: ARP target table is full!\n",
670 bond->dev->name);
671 ret = -EINVAL;
672 goto out;
673 }
674
675 } else if (buf[0] == '-') {
676 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
677 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
678 bond->dev->name, &newtarget);
679 ret = -EINVAL;
680 goto out;
681 }
682
683 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
684 if (targets[i] == newtarget) {
685 int j;
686 pr_info("%s: removing ARP target %pI4.\n",
687 bond->dev->name, &newtarget);
688 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
689 targets[j] = targets[j+1];
690
691 targets[j] = 0;
692 done = 1;
693 }
694 }
695 if (!done) {
696 pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
697 bond->dev->name, &newtarget);
698 ret = -EINVAL;
699 goto out;
700 }
701 } else {
702 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
703 bond->dev->name);
704 ret = -EPERM;
705 goto out;
706 }
707
708 out:
709 return ret;
710 }
711 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
712
713 /*
714 * Show and set the up and down delays. These must be multiples of the
715 * MII monitoring value, and are stored internally as the multiplier.
716 * Thus, we must translate to MS for the real world.
717 */
718 static ssize_t bonding_show_downdelay(struct device *d,
719 struct device_attribute *attr,
720 char *buf)
721 {
722 struct bonding *bond = to_bond(d);
723
724 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
725 }
726
727 static ssize_t bonding_store_downdelay(struct device *d,
728 struct device_attribute *attr,
729 const char *buf, size_t count)
730 {
731 int new_value, ret = count;
732 struct bonding *bond = to_bond(d);
733
734 if (!(bond->params.miimon)) {
735 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
736 bond->dev->name);
737 ret = -EPERM;
738 goto out;
739 }
740
741 if (sscanf(buf, "%d", &new_value) != 1) {
742 pr_err("%s: no down delay value specified.\n", bond->dev->name);
743 ret = -EINVAL;
744 goto out;
745 }
746 if (new_value < 0) {
747 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
748 bond->dev->name, new_value, 1, INT_MAX);
749 ret = -EINVAL;
750 goto out;
751 } else {
752 if ((new_value % bond->params.miimon) != 0) {
753 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
754 bond->dev->name, new_value,
755 bond->params.miimon,
756 (new_value / bond->params.miimon) *
757 bond->params.miimon);
758 }
759 bond->params.downdelay = new_value / bond->params.miimon;
760 pr_info("%s: Setting down delay to %d.\n",
761 bond->dev->name,
762 bond->params.downdelay * bond->params.miimon);
763
764 }
765
766 out:
767 return ret;
768 }
769 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
770 bonding_show_downdelay, bonding_store_downdelay);
771
772 static ssize_t bonding_show_updelay(struct device *d,
773 struct device_attribute *attr,
774 char *buf)
775 {
776 struct bonding *bond = to_bond(d);
777
778 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
779
780 }
781
782 static ssize_t bonding_store_updelay(struct device *d,
783 struct device_attribute *attr,
784 const char *buf, size_t count)
785 {
786 int new_value, ret = count;
787 struct bonding *bond = to_bond(d);
788
789 if (!(bond->params.miimon)) {
790 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
791 bond->dev->name);
792 ret = -EPERM;
793 goto out;
794 }
795
796 if (sscanf(buf, "%d", &new_value) != 1) {
797 pr_err("%s: no up delay value specified.\n",
798 bond->dev->name);
799 ret = -EINVAL;
800 goto out;
801 }
802 if (new_value < 0) {
803 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
804 bond->dev->name, new_value, 1, INT_MAX);
805 ret = -EINVAL;
806 goto out;
807 } else {
808 if ((new_value % bond->params.miimon) != 0) {
809 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
810 bond->dev->name, new_value,
811 bond->params.miimon,
812 (new_value / bond->params.miimon) *
813 bond->params.miimon);
814 }
815 bond->params.updelay = new_value / bond->params.miimon;
816 pr_info("%s: Setting up delay to %d.\n",
817 bond->dev->name,
818 bond->params.updelay * bond->params.miimon);
819 }
820
821 out:
822 return ret;
823 }
824 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
825 bonding_show_updelay, bonding_store_updelay);
826
827 /*
828 * Show and set the LACP interval. Interface must be down, and the mode
829 * must be set to 802.3ad mode.
830 */
831 static ssize_t bonding_show_lacp(struct device *d,
832 struct device_attribute *attr,
833 char *buf)
834 {
835 struct bonding *bond = to_bond(d);
836
837 return sprintf(buf, "%s %d\n",
838 bond_lacp_tbl[bond->params.lacp_fast].modename,
839 bond->params.lacp_fast);
840 }
841
842 static ssize_t bonding_store_lacp(struct device *d,
843 struct device_attribute *attr,
844 const char *buf, size_t count)
845 {
846 int new_value, ret = count;
847 struct bonding *bond = to_bond(d);
848
849 if (bond->dev->flags & IFF_UP) {
850 pr_err("%s: Unable to update LACP rate because interface is up.\n",
851 bond->dev->name);
852 ret = -EPERM;
853 goto out;
854 }
855
856 if (bond->params.mode != BOND_MODE_8023AD) {
857 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
858 bond->dev->name);
859 ret = -EPERM;
860 goto out;
861 }
862
863 new_value = bond_parse_parm(buf, bond_lacp_tbl);
864
865 if ((new_value == 1) || (new_value == 0)) {
866 bond->params.lacp_fast = new_value;
867 pr_info("%s: Setting LACP rate to %s (%d).\n",
868 bond->dev->name, bond_lacp_tbl[new_value].modename,
869 new_value);
870 } else {
871 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
872 bond->dev->name, (int)strlen(buf) - 1, buf);
873 ret = -EINVAL;
874 }
875 out:
876 return ret;
877 }
878 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
879 bonding_show_lacp, bonding_store_lacp);
880
881 static ssize_t bonding_show_ad_select(struct device *d,
882 struct device_attribute *attr,
883 char *buf)
884 {
885 struct bonding *bond = to_bond(d);
886
887 return sprintf(buf, "%s %d\n",
888 ad_select_tbl[bond->params.ad_select].modename,
889 bond->params.ad_select);
890 }
891
892
893 static ssize_t bonding_store_ad_select(struct device *d,
894 struct device_attribute *attr,
895 const char *buf, size_t count)
896 {
897 int new_value, ret = count;
898 struct bonding *bond = to_bond(d);
899
900 if (bond->dev->flags & IFF_UP) {
901 pr_err("%s: Unable to update ad_select because interface is up.\n",
902 bond->dev->name);
903 ret = -EPERM;
904 goto out;
905 }
906
907 new_value = bond_parse_parm(buf, ad_select_tbl);
908
909 if (new_value != -1) {
910 bond->params.ad_select = new_value;
911 pr_info("%s: Setting ad_select to %s (%d).\n",
912 bond->dev->name, ad_select_tbl[new_value].modename,
913 new_value);
914 } else {
915 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
916 bond->dev->name, (int)strlen(buf) - 1, buf);
917 ret = -EINVAL;
918 }
919 out:
920 return ret;
921 }
922 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
923 bonding_show_ad_select, bonding_store_ad_select);
924
925 /*
926 * Show and set the number of grat ARP to send after a failover event.
927 */
928 static ssize_t bonding_show_n_grat_arp(struct device *d,
929 struct device_attribute *attr,
930 char *buf)
931 {
932 struct bonding *bond = to_bond(d);
933
934 return sprintf(buf, "%d\n", bond->params.num_grat_arp);
935 }
936
937 static ssize_t bonding_store_n_grat_arp(struct device *d,
938 struct device_attribute *attr,
939 const char *buf, size_t count)
940 {
941 int new_value, ret = count;
942 struct bonding *bond = to_bond(d);
943
944 if (sscanf(buf, "%d", &new_value) != 1) {
945 pr_err("%s: no num_grat_arp value specified.\n",
946 bond->dev->name);
947 ret = -EINVAL;
948 goto out;
949 }
950 if (new_value < 0 || new_value > 255) {
951 pr_err("%s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
952 bond->dev->name, new_value);
953 ret = -EINVAL;
954 goto out;
955 } else {
956 bond->params.num_grat_arp = new_value;
957 }
958 out:
959 return ret;
960 }
961 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
962 bonding_show_n_grat_arp, bonding_store_n_grat_arp);
963
964 /*
965 * Show and set the number of unsolicited NA's to send after a failover event.
966 */
967 static ssize_t bonding_show_n_unsol_na(struct device *d,
968 struct device_attribute *attr,
969 char *buf)
970 {
971 struct bonding *bond = to_bond(d);
972
973 return sprintf(buf, "%d\n", bond->params.num_unsol_na);
974 }
975
976 static ssize_t bonding_store_n_unsol_na(struct device *d,
977 struct device_attribute *attr,
978 const char *buf, size_t count)
979 {
980 int new_value, ret = count;
981 struct bonding *bond = to_bond(d);
982
983 if (sscanf(buf, "%d", &new_value) != 1) {
984 pr_err("%s: no num_unsol_na value specified.\n",
985 bond->dev->name);
986 ret = -EINVAL;
987 goto out;
988 }
989
990 if (new_value < 0 || new_value > 255) {
991 pr_err("%s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
992 bond->dev->name, new_value);
993 ret = -EINVAL;
994 goto out;
995 } else
996 bond->params.num_unsol_na = new_value;
997 out:
998 return ret;
999 }
1000 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
1001 bonding_show_n_unsol_na, bonding_store_n_unsol_na);
1002
1003 /*
1004 * Show and set the MII monitor interval. There are two tricky bits
1005 * here. First, if MII monitoring is activated, then we must disable
1006 * ARP monitoring. Second, if the timer isn't running, we must
1007 * start it.
1008 */
1009 static ssize_t bonding_show_miimon(struct device *d,
1010 struct device_attribute *attr,
1011 char *buf)
1012 {
1013 struct bonding *bond = to_bond(d);
1014
1015 return sprintf(buf, "%d\n", bond->params.miimon);
1016 }
1017
1018 static ssize_t bonding_store_miimon(struct device *d,
1019 struct device_attribute *attr,
1020 const char *buf, size_t count)
1021 {
1022 int new_value, ret = count;
1023 struct bonding *bond = to_bond(d);
1024
1025 if (sscanf(buf, "%d", &new_value) != 1) {
1026 pr_err("%s: no miimon value specified.\n",
1027 bond->dev->name);
1028 ret = -EINVAL;
1029 goto out;
1030 }
1031 if (new_value < 0) {
1032 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1033 bond->dev->name, new_value, 1, INT_MAX);
1034 ret = -EINVAL;
1035 goto out;
1036 } else {
1037 pr_info("%s: Setting MII monitoring interval to %d.\n",
1038 bond->dev->name, new_value);
1039 bond->params.miimon = new_value;
1040 if (bond->params.updelay)
1041 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
1042 bond->dev->name,
1043 bond->params.updelay * bond->params.miimon);
1044 if (bond->params.downdelay)
1045 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
1046 bond->dev->name,
1047 bond->params.downdelay * bond->params.miimon);
1048 if (bond->params.arp_interval) {
1049 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
1050 bond->dev->name);
1051 bond->params.arp_interval = 0;
1052 bond->dev->priv_flags &= ~IFF_MASTER_ARPMON;
1053 if (bond->params.arp_validate) {
1054 bond_unregister_arp(bond);
1055 bond->params.arp_validate =
1056 BOND_ARP_VALIDATE_NONE;
1057 }
1058 if (delayed_work_pending(&bond->arp_work)) {
1059 cancel_delayed_work(&bond->arp_work);
1060 flush_workqueue(bond->wq);
1061 }
1062 }
1063
1064 if (bond->dev->flags & IFF_UP) {
1065 /* If the interface is up, we may need to fire off
1066 * the MII timer. If the interface is down, the
1067 * timer will get fired off when the open function
1068 * is called.
1069 */
1070 if (!delayed_work_pending(&bond->mii_work)) {
1071 INIT_DELAYED_WORK(&bond->mii_work,
1072 bond_mii_monitor);
1073 queue_delayed_work(bond->wq,
1074 &bond->mii_work, 0);
1075 }
1076 }
1077 }
1078 out:
1079 return ret;
1080 }
1081 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1082 bonding_show_miimon, bonding_store_miimon);
1083
1084 /*
1085 * Show and set the primary slave. The store function is much
1086 * simpler than bonding_store_slaves function because it only needs to
1087 * handle one interface name.
1088 * The bond must be a mode that supports a primary for this be
1089 * set.
1090 */
1091 static ssize_t bonding_show_primary(struct device *d,
1092 struct device_attribute *attr,
1093 char *buf)
1094 {
1095 int count = 0;
1096 struct bonding *bond = to_bond(d);
1097
1098 if (bond->primary_slave)
1099 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1100
1101 return count;
1102 }
1103
1104 static ssize_t bonding_store_primary(struct device *d,
1105 struct device_attribute *attr,
1106 const char *buf, size_t count)
1107 {
1108 int i;
1109 struct slave *slave;
1110 struct bonding *bond = to_bond(d);
1111
1112 if (!rtnl_trylock())
1113 return restart_syscall();
1114 read_lock(&bond->lock);
1115 write_lock_bh(&bond->curr_slave_lock);
1116
1117 if (!USES_PRIMARY(bond->params.mode)) {
1118 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1119 bond->dev->name, bond->dev->name, bond->params.mode);
1120 } else {
1121 bond_for_each_slave(bond, slave, i) {
1122 if (strnicmp
1123 (slave->dev->name, buf,
1124 strlen(slave->dev->name)) == 0) {
1125 pr_info("%s: Setting %s as primary slave.\n",
1126 bond->dev->name, slave->dev->name);
1127 bond->primary_slave = slave;
1128 strcpy(bond->params.primary, slave->dev->name);
1129 bond_select_active_slave(bond);
1130 goto out;
1131 }
1132 }
1133
1134 /* if we got here, then we didn't match the name of any slave */
1135
1136 if (strlen(buf) == 0 || buf[0] == '\n') {
1137 pr_info("%s: Setting primary slave to None.\n",
1138 bond->dev->name);
1139 bond->primary_slave = NULL;
1140 bond_select_active_slave(bond);
1141 } else {
1142 pr_info("%s: Unable to set %.*s as primary slave as it is not a slave.\n",
1143 bond->dev->name, (int)strlen(buf) - 1, buf);
1144 }
1145 }
1146 out:
1147 write_unlock_bh(&bond->curr_slave_lock);
1148 read_unlock(&bond->lock);
1149 rtnl_unlock();
1150
1151 return count;
1152 }
1153 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1154 bonding_show_primary, bonding_store_primary);
1155
1156 /*
1157 * Show and set the primary_reselect flag.
1158 */
1159 static ssize_t bonding_show_primary_reselect(struct device *d,
1160 struct device_attribute *attr,
1161 char *buf)
1162 {
1163 struct bonding *bond = to_bond(d);
1164
1165 return sprintf(buf, "%s %d\n",
1166 pri_reselect_tbl[bond->params.primary_reselect].modename,
1167 bond->params.primary_reselect);
1168 }
1169
1170 static ssize_t bonding_store_primary_reselect(struct device *d,
1171 struct device_attribute *attr,
1172 const char *buf, size_t count)
1173 {
1174 int new_value, ret = count;
1175 struct bonding *bond = to_bond(d);
1176
1177 if (!rtnl_trylock())
1178 return restart_syscall();
1179
1180 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1181 if (new_value < 0) {
1182 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1183 bond->dev->name,
1184 (int) strlen(buf) - 1, buf);
1185 ret = -EINVAL;
1186 goto out;
1187 }
1188
1189 bond->params.primary_reselect = new_value;
1190 pr_info("%s: setting primary_reselect to %s (%d).\n",
1191 bond->dev->name, pri_reselect_tbl[new_value].modename,
1192 new_value);
1193
1194 read_lock(&bond->lock);
1195 write_lock_bh(&bond->curr_slave_lock);
1196 bond_select_active_slave(bond);
1197 write_unlock_bh(&bond->curr_slave_lock);
1198 read_unlock(&bond->lock);
1199 out:
1200 rtnl_unlock();
1201 return ret;
1202 }
1203 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1204 bonding_show_primary_reselect,
1205 bonding_store_primary_reselect);
1206
1207 /*
1208 * Show and set the use_carrier flag.
1209 */
1210 static ssize_t bonding_show_carrier(struct device *d,
1211 struct device_attribute *attr,
1212 char *buf)
1213 {
1214 struct bonding *bond = to_bond(d);
1215
1216 return sprintf(buf, "%d\n", bond->params.use_carrier);
1217 }
1218
1219 static ssize_t bonding_store_carrier(struct device *d,
1220 struct device_attribute *attr,
1221 const char *buf, size_t count)
1222 {
1223 int new_value, ret = count;
1224 struct bonding *bond = to_bond(d);
1225
1226
1227 if (sscanf(buf, "%d", &new_value) != 1) {
1228 pr_err("%s: no use_carrier value specified.\n",
1229 bond->dev->name);
1230 ret = -EINVAL;
1231 goto out;
1232 }
1233 if ((new_value == 0) || (new_value == 1)) {
1234 bond->params.use_carrier = new_value;
1235 pr_info("%s: Setting use_carrier to %d.\n",
1236 bond->dev->name, new_value);
1237 } else {
1238 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1239 bond->dev->name, new_value);
1240 }
1241 out:
1242 return count;
1243 }
1244 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1245 bonding_show_carrier, bonding_store_carrier);
1246
1247
1248 /*
1249 * Show and set currently active_slave.
1250 */
1251 static ssize_t bonding_show_active_slave(struct device *d,
1252 struct device_attribute *attr,
1253 char *buf)
1254 {
1255 struct slave *curr;
1256 struct bonding *bond = to_bond(d);
1257 int count = 0;
1258
1259 read_lock(&bond->curr_slave_lock);
1260 curr = bond->curr_active_slave;
1261 read_unlock(&bond->curr_slave_lock);
1262
1263 if (USES_PRIMARY(bond->params.mode) && curr)
1264 count = sprintf(buf, "%s\n", curr->dev->name);
1265 return count;
1266 }
1267
1268 static ssize_t bonding_store_active_slave(struct device *d,
1269 struct device_attribute *attr,
1270 const char *buf, size_t count)
1271 {
1272 int i;
1273 struct slave *slave;
1274 struct slave *old_active = NULL;
1275 struct slave *new_active = NULL;
1276 struct bonding *bond = to_bond(d);
1277
1278 if (!rtnl_trylock())
1279 return restart_syscall();
1280 read_lock(&bond->lock);
1281 write_lock_bh(&bond->curr_slave_lock);
1282
1283 if (!USES_PRIMARY(bond->params.mode))
1284 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1285 bond->dev->name, bond->dev->name, bond->params.mode);
1286 else {
1287 bond_for_each_slave(bond, slave, i) {
1288 if (strnicmp
1289 (slave->dev->name, buf,
1290 strlen(slave->dev->name)) == 0) {
1291 old_active = bond->curr_active_slave;
1292 new_active = slave;
1293 if (new_active == old_active) {
1294 /* do nothing */
1295 pr_info("%s: %s is already the current active slave.\n",
1296 bond->dev->name,
1297 slave->dev->name);
1298 goto out;
1299 }
1300 else {
1301 if ((new_active) &&
1302 (old_active) &&
1303 (new_active->link == BOND_LINK_UP) &&
1304 IS_UP(new_active->dev)) {
1305 pr_info("%s: Setting %s as active slave.\n",
1306 bond->dev->name,
1307 slave->dev->name);
1308 bond_change_active_slave(bond, new_active);
1309 }
1310 else {
1311 pr_info("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
1312 bond->dev->name,
1313 slave->dev->name,
1314 slave->dev->name);
1315 }
1316 goto out;
1317 }
1318 }
1319 }
1320
1321 /* if we got here, then we didn't match the name of any slave */
1322
1323 if (strlen(buf) == 0 || buf[0] == '\n') {
1324 pr_info("%s: Setting active slave to None.\n",
1325 bond->dev->name);
1326 bond->primary_slave = NULL;
1327 bond_select_active_slave(bond);
1328 } else {
1329 pr_info("%s: Unable to set %.*s as active slave as it is not a slave.\n",
1330 bond->dev->name, (int)strlen(buf) - 1, buf);
1331 }
1332 }
1333 out:
1334 write_unlock_bh(&bond->curr_slave_lock);
1335 read_unlock(&bond->lock);
1336 rtnl_unlock();
1337
1338 return count;
1339
1340 }
1341 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1342 bonding_show_active_slave, bonding_store_active_slave);
1343
1344
1345 /*
1346 * Show link status of the bond interface.
1347 */
1348 static ssize_t bonding_show_mii_status(struct device *d,
1349 struct device_attribute *attr,
1350 char *buf)
1351 {
1352 struct slave *curr;
1353 struct bonding *bond = to_bond(d);
1354
1355 read_lock(&bond->curr_slave_lock);
1356 curr = bond->curr_active_slave;
1357 read_unlock(&bond->curr_slave_lock);
1358
1359 return sprintf(buf, "%s\n", curr ? "up" : "down");
1360 }
1361 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1362
1363
1364 /*
1365 * Show current 802.3ad aggregator ID.
1366 */
1367 static ssize_t bonding_show_ad_aggregator(struct device *d,
1368 struct device_attribute *attr,
1369 char *buf)
1370 {
1371 int count = 0;
1372 struct bonding *bond = to_bond(d);
1373
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.aggregator_id);
1379 }
1380
1381 return count;
1382 }
1383 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1384
1385
1386 /*
1387 * Show number of active 802.3ad ports.
1388 */
1389 static ssize_t bonding_show_ad_num_ports(struct device *d,
1390 struct device_attribute *attr,
1391 char *buf)
1392 {
1393 int count = 0;
1394 struct bonding *bond = to_bond(d);
1395
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.ports);
1401 }
1402
1403 return count;
1404 }
1405 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1406
1407
1408 /*
1409 * Show current 802.3ad actor key.
1410 */
1411 static ssize_t bonding_show_ad_actor_key(struct device *d,
1412 struct device_attribute *attr,
1413 char *buf)
1414 {
1415 int count = 0;
1416 struct bonding *bond = to_bond(d);
1417
1418 if (bond->params.mode == BOND_MODE_8023AD) {
1419 struct ad_info ad_info;
1420 count = sprintf(buf, "%d\n",
1421 (bond_3ad_get_active_agg_info(bond, &ad_info))
1422 ? 0 : ad_info.actor_key);
1423 }
1424
1425 return count;
1426 }
1427 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1428
1429
1430 /*
1431 * Show current 802.3ad partner key.
1432 */
1433 static ssize_t bonding_show_ad_partner_key(struct device *d,
1434 struct device_attribute *attr,
1435 char *buf)
1436 {
1437 int count = 0;
1438 struct bonding *bond = to_bond(d);
1439
1440 if (bond->params.mode == BOND_MODE_8023AD) {
1441 struct ad_info ad_info;
1442 count = sprintf(buf, "%d\n",
1443 (bond_3ad_get_active_agg_info(bond, &ad_info))
1444 ? 0 : ad_info.partner_key);
1445 }
1446
1447 return count;
1448 }
1449 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1450
1451
1452 /*
1453 * Show current 802.3ad partner mac.
1454 */
1455 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1456 struct device_attribute *attr,
1457 char *buf)
1458 {
1459 int count = 0;
1460 struct bonding *bond = to_bond(d);
1461
1462 if (bond->params.mode == BOND_MODE_8023AD) {
1463 struct ad_info ad_info;
1464 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1465 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1466 }
1467
1468 return count;
1469 }
1470 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1471
1472
1473
1474 static struct attribute *per_bond_attrs[] = {
1475 &dev_attr_slaves.attr,
1476 &dev_attr_mode.attr,
1477 &dev_attr_fail_over_mac.attr,
1478 &dev_attr_arp_validate.attr,
1479 &dev_attr_arp_interval.attr,
1480 &dev_attr_arp_ip_target.attr,
1481 &dev_attr_downdelay.attr,
1482 &dev_attr_updelay.attr,
1483 &dev_attr_lacp_rate.attr,
1484 &dev_attr_ad_select.attr,
1485 &dev_attr_xmit_hash_policy.attr,
1486 &dev_attr_num_grat_arp.attr,
1487 &dev_attr_num_unsol_na.attr,
1488 &dev_attr_miimon.attr,
1489 &dev_attr_primary.attr,
1490 &dev_attr_primary_reselect.attr,
1491 &dev_attr_use_carrier.attr,
1492 &dev_attr_active_slave.attr,
1493 &dev_attr_mii_status.attr,
1494 &dev_attr_ad_aggregator.attr,
1495 &dev_attr_ad_num_ports.attr,
1496 &dev_attr_ad_actor_key.attr,
1497 &dev_attr_ad_partner_key.attr,
1498 &dev_attr_ad_partner_mac.attr,
1499 NULL,
1500 };
1501
1502 static struct attribute_group bonding_group = {
1503 .name = "bonding",
1504 .attrs = per_bond_attrs,
1505 };
1506
1507 /*
1508 * Initialize sysfs. This sets up the bonding_masters file in
1509 * /sys/class/net.
1510 */
1511 int bond_create_sysfs(void)
1512 {
1513 int ret;
1514
1515 ret = netdev_class_create_file(&class_attr_bonding_masters);
1516 /*
1517 * Permit multiple loads of the module by ignoring failures to
1518 * create the bonding_masters sysfs file. Bonding devices
1519 * created by second or subsequent loads of the module will
1520 * not be listed in, or controllable by, bonding_masters, but
1521 * will have the usual "bonding" sysfs directory.
1522 *
1523 * This is done to preserve backwards compatibility for
1524 * initscripts/sysconfig, which load bonding multiple times to
1525 * configure multiple bonding devices.
1526 */
1527 if (ret == -EEXIST) {
1528 /* Is someone being kinky and naming a device bonding_master? */
1529 if (__dev_get_by_name(&init_net,
1530 class_attr_bonding_masters.attr.name))
1531 pr_err("network device named %s already exists in sysfs",
1532 class_attr_bonding_masters.attr.name);
1533 ret = 0;
1534 }
1535
1536 return ret;
1537
1538 }
1539
1540 /*
1541 * Remove /sys/class/net/bonding_masters.
1542 */
1543 void bond_destroy_sysfs(void)
1544 {
1545 netdev_class_remove_file(&class_attr_bonding_masters);
1546 }
1547
1548 /*
1549 * Initialize sysfs for each bond. This sets up and registers
1550 * the 'bondctl' directory for each individual bond under /sys/class/net.
1551 */
1552 void bond_prepare_sysfs_group(struct bonding *bond)
1553 {
1554 bond->dev->sysfs_groups[0] = &bonding_group;
1555 }
1556
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