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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[deliverable/linux.git] / drivers / net / bonding / bond_sysfs.c
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,
55 struct class_attribute *attr,
56 char *buf)
57 {
58 struct net *net = current->nsproxy->net_ns;
59 struct bond_net *bn = net_generic(net, bond_net_id);
60 int res = 0;
61 struct bonding *bond;
62
63 rtnl_lock();
64
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)
69 res = PAGE_SIZE - 10;
70 res += sprintf(buf + res, "++more++ ");
71 break;
72 }
73 res += sprintf(buf + res, "%s ", bond->dev->name);
74 }
75 if (res)
76 buf[res-1] = '\n'; /* eat the leftover space */
77
78 rtnl_unlock();
79 return res;
80 }
81
82 static struct net_device *bond_get_by_name(struct net *net, const char *ifname)
83 {
84 struct bond_net *bn = net_generic(net, bond_net_id);
85 struct bonding *bond;
86
87 list_for_each_entry(bond, &bn->dev_list, bond_list) {
88 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
89 return bond->dev;
90 }
91 return NULL;
92 }
93
94 /*
95 * "store" function for the bond_masters attribute. This is what
96 * creates and deletes entire bonds.
97 *
98 * The class parameter is ignored.
99 *
100 */
101
102 static ssize_t bonding_store_bonds(struct class *cls,
103 struct class_attribute *attr,
104 const char *buffer, size_t count)
105 {
106 struct net *net = current->nsproxy->net_ns;
107 char command[IFNAMSIZ + 1] = {0, };
108 char *ifname;
109 int rv, res = count;
110
111 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
112 ifname = command + 1;
113 if ((strlen(command) <= 1) ||
114 !dev_valid_name(ifname))
115 goto err_no_cmd;
116
117 if (command[0] == '+') {
118 pr_info("%s is being created...\n", ifname);
119 rv = bond_create(net, ifname);
120 if (rv) {
121 pr_info("Bond creation failed.\n");
122 res = rv;
123 }
124 } else if (command[0] == '-') {
125 struct net_device *bond_dev;
126
127 rtnl_lock();
128 bond_dev = bond_get_by_name(net, ifname);
129 if (bond_dev) {
130 pr_info("%s is being deleted...\n", ifname);
131 unregister_netdevice(bond_dev);
132 } else {
133 pr_err("unable to delete non-existent %s\n", ifname);
134 res = -ENODEV;
135 }
136 rtnl_unlock();
137 } else
138 goto err_no_cmd;
139
140 /* Always return either count or an error. If you return 0, you'll
141 * get called forever, which is bad.
142 */
143 return res;
144
145 err_no_cmd:
146 pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
147 return -EPERM;
148 }
149
150 /* class attribute for bond_masters file. This ends up in /sys/class/net */
151 static CLASS_ATTR(bonding_masters, S_IWUSR | S_IRUGO,
152 bonding_show_bonds, bonding_store_bonds);
153
154 int bond_create_slave_symlinks(struct net_device *master,
155 struct net_device *slave)
156 {
157 char linkname[IFNAMSIZ+7];
158 int ret = 0;
159
160 /* first, create a link from the slave back to the master */
161 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
162 "master");
163 if (ret)
164 return ret;
165 /* next, create a link from the master to the slave */
166 sprintf(linkname, "slave_%s", slave->name);
167 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
168 linkname);
169 return ret;
170
171 }
172
173 void bond_destroy_slave_symlinks(struct net_device *master,
174 struct net_device *slave)
175 {
176 char linkname[IFNAMSIZ+7];
177
178 sysfs_remove_link(&(slave->dev.kobj), "master");
179 sprintf(linkname, "slave_%s", slave->name);
180 sysfs_remove_link(&(master->dev.kobj), linkname);
181 }
182
183
184 /*
185 * Show the slaves in the current bond.
186 */
187 static ssize_t bonding_show_slaves(struct device *d,
188 struct device_attribute *attr, char *buf)
189 {
190 struct slave *slave;
191 int i, res = 0;
192 struct bonding *bond = to_bond(d);
193
194 read_lock(&bond->lock);
195 bond_for_each_slave(bond, slave, i) {
196 if (res > (PAGE_SIZE - IFNAMSIZ)) {
197 /* not enough space for another interface name */
198 if ((PAGE_SIZE - res) > 10)
199 res = PAGE_SIZE - 10;
200 res += sprintf(buf + res, "++more++ ");
201 break;
202 }
203 res += sprintf(buf + res, "%s ", slave->dev->name);
204 }
205 read_unlock(&bond->lock);
206 if (res)
207 buf[res-1] = '\n'; /* eat the leftover space */
208 return res;
209 }
210
211 /*
212 * Set the slaves in the current bond. The bond interface must be
213 * up for this to succeed.
214 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
215 * All hard work should be done there.
216 */
217 static ssize_t bonding_store_slaves(struct device *d,
218 struct device_attribute *attr,
219 const char *buffer, size_t count)
220 {
221 char command[IFNAMSIZ + 1] = { 0, };
222 char *ifname;
223 int res, ret = count;
224 struct net_device *dev;
225 struct bonding *bond = to_bond(d);
226
227 /* Quick sanity check -- is the bond interface up? */
228 if (!(bond->dev->flags & IFF_UP)) {
229 pr_warning("%s: doing slave updates when interface is down.\n",
230 bond->dev->name);
231 }
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 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
243 if (!dev) {
244 pr_info("%s: Interface %s does not exist!\n",
245 bond->dev->name, ifname);
246 ret = -ENODEV;
247 goto out;
248 }
249
250 switch (command[0]) {
251 case '+':
252 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
253 res = bond_enslave(bond->dev, dev);
254 break;
255
256 case '-':
257 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
258 res = bond_release(bond->dev, dev);
259 break;
260
261 default:
262 goto err_no_cmd;
263 }
264
265 if (res)
266 ret = res;
267 goto out;
268
269 err_no_cmd:
270 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
271 bond->dev->name);
272 ret = -EPERM;
273
274 out:
275 rtnl_unlock();
276 return ret;
277 }
278
279 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
280 bonding_store_slaves);
281
282 /*
283 * Show and set the bonding mode. The bond interface must be down to
284 * change the mode.
285 */
286 static ssize_t bonding_show_mode(struct device *d,
287 struct device_attribute *attr, char *buf)
288 {
289 struct bonding *bond = to_bond(d);
290
291 return sprintf(buf, "%s %d\n",
292 bond_mode_tbl[bond->params.mode].modename,
293 bond->params.mode);
294 }
295
296 static ssize_t bonding_store_mode(struct device *d,
297 struct device_attribute *attr,
298 const char *buf, size_t count)
299 {
300 int new_value, ret = count;
301 struct bonding *bond = to_bond(d);
302
303 if (bond->dev->flags & IFF_UP) {
304 pr_err("unable to update mode of %s because interface is up.\n",
305 bond->dev->name);
306 ret = -EPERM;
307 goto out;
308 }
309
310 new_value = bond_parse_parm(buf, bond_mode_tbl);
311 if (new_value < 0) {
312 pr_err("%s: Ignoring invalid mode value %.*s.\n",
313 bond->dev->name, (int)strlen(buf) - 1, buf);
314 ret = -EINVAL;
315 goto out;
316 }
317 if ((new_value == BOND_MODE_ALB ||
318 new_value == BOND_MODE_TLB) &&
319 bond->params.arp_interval) {
320 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
321 bond->dev->name, bond_mode_tbl[new_value].modename);
322 ret = -EINVAL;
323 goto out;
324 }
325 if (bond->params.mode == BOND_MODE_8023AD)
326 bond_unset_master_3ad_flags(bond);
327
328 if (bond->params.mode == BOND_MODE_ALB)
329 bond_unset_master_alb_flags(bond);
330
331 bond->params.mode = new_value;
332 bond_set_mode_ops(bond, bond->params.mode);
333 pr_info("%s: setting mode to %s (%d).\n",
334 bond->dev->name, bond_mode_tbl[new_value].modename,
335 new_value);
336 out:
337 return ret;
338 }
339 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
340 bonding_show_mode, bonding_store_mode);
341
342 /*
343 * Show and set the bonding transmit hash method.
344 * The bond interface must be down to change the xmit hash policy.
345 */
346 static ssize_t bonding_show_xmit_hash(struct device *d,
347 struct device_attribute *attr,
348 char *buf)
349 {
350 struct bonding *bond = to_bond(d);
351
352 return sprintf(buf, "%s %d\n",
353 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
354 bond->params.xmit_policy);
355 }
356
357 static ssize_t bonding_store_xmit_hash(struct device *d,
358 struct device_attribute *attr,
359 const char *buf, size_t count)
360 {
361 int new_value, ret = count;
362 struct bonding *bond = to_bond(d);
363
364 if (bond->dev->flags & IFF_UP) {
365 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
366 bond->dev->name);
367 ret = -EPERM;
368 goto out;
369 }
370
371 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
372 if (new_value < 0) {
373 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
374 bond->dev->name,
375 (int)strlen(buf) - 1, buf);
376 ret = -EINVAL;
377 goto out;
378 } else {
379 bond->params.xmit_policy = new_value;
380 bond_set_mode_ops(bond, bond->params.mode);
381 pr_info("%s: setting xmit hash policy to %s (%d).\n",
382 bond->dev->name,
383 xmit_hashtype_tbl[new_value].modename, new_value);
384 }
385 out:
386 return ret;
387 }
388 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
389 bonding_show_xmit_hash, bonding_store_xmit_hash);
390
391 /*
392 * Show and set arp_validate.
393 */
394 static ssize_t bonding_show_arp_validate(struct device *d,
395 struct device_attribute *attr,
396 char *buf)
397 {
398 struct bonding *bond = to_bond(d);
399
400 return sprintf(buf, "%s %d\n",
401 arp_validate_tbl[bond->params.arp_validate].modename,
402 bond->params.arp_validate);
403 }
404
405 static ssize_t bonding_store_arp_validate(struct device *d,
406 struct device_attribute *attr,
407 const char *buf, size_t count)
408 {
409 int new_value;
410 struct bonding *bond = to_bond(d);
411
412 new_value = bond_parse_parm(buf, arp_validate_tbl);
413 if (new_value < 0) {
414 pr_err("%s: Ignoring invalid arp_validate value %s\n",
415 bond->dev->name, buf);
416 return -EINVAL;
417 }
418 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
419 pr_err("%s: arp_validate only supported in active-backup mode.\n",
420 bond->dev->name);
421 return -EINVAL;
422 }
423 pr_info("%s: setting arp_validate to %s (%d).\n",
424 bond->dev->name, arp_validate_tbl[new_value].modename,
425 new_value);
426
427 if (!bond->params.arp_validate && new_value)
428 bond_register_arp(bond);
429 else if (bond->params.arp_validate && !new_value)
430 bond_unregister_arp(bond);
431
432 bond->params.arp_validate = new_value;
433
434 return count;
435 }
436
437 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
438 bonding_store_arp_validate);
439
440 /*
441 * Show and store fail_over_mac. User only allowed to change the
442 * value when there are no slaves.
443 */
444 static ssize_t bonding_show_fail_over_mac(struct device *d,
445 struct device_attribute *attr,
446 char *buf)
447 {
448 struct bonding *bond = to_bond(d);
449
450 return sprintf(buf, "%s %d\n",
451 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
452 bond->params.fail_over_mac);
453 }
454
455 static ssize_t bonding_store_fail_over_mac(struct device *d,
456 struct device_attribute *attr,
457 const char *buf, size_t count)
458 {
459 int new_value;
460 struct bonding *bond = to_bond(d);
461
462 if (bond->slave_cnt != 0) {
463 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
464 bond->dev->name);
465 return -EPERM;
466 }
467
468 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
469 if (new_value < 0) {
470 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
471 bond->dev->name, buf);
472 return -EINVAL;
473 }
474
475 bond->params.fail_over_mac = new_value;
476 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
477 bond->dev->name, fail_over_mac_tbl[new_value].modename,
478 new_value);
479
480 return count;
481 }
482
483 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
484 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
485
486 /*
487 * Show and set the arp timer interval. There are two tricky bits
488 * here. First, if ARP monitoring is activated, then we must disable
489 * MII monitoring. Second, if the ARP timer isn't running, we must
490 * start it.
491 */
492 static ssize_t bonding_show_arp_interval(struct device *d,
493 struct device_attribute *attr,
494 char *buf)
495 {
496 struct bonding *bond = to_bond(d);
497
498 return sprintf(buf, "%d\n", bond->params.arp_interval);
499 }
500
501 static ssize_t bonding_store_arp_interval(struct device *d,
502 struct device_attribute *attr,
503 const char *buf, size_t count)
504 {
505 int new_value, ret = count;
506 struct bonding *bond = to_bond(d);
507
508 if (sscanf(buf, "%d", &new_value) != 1) {
509 pr_err("%s: no arp_interval value specified.\n",
510 bond->dev->name);
511 ret = -EINVAL;
512 goto out;
513 }
514 if (new_value < 0) {
515 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
516 bond->dev->name, new_value, INT_MAX);
517 ret = -EINVAL;
518 goto out;
519 }
520 if (bond->params.mode == BOND_MODE_ALB ||
521 bond->params.mode == BOND_MODE_TLB) {
522 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
523 bond->dev->name, bond->dev->name);
524 ret = -EINVAL;
525 goto out;
526 }
527 pr_info("%s: Setting ARP monitoring interval to %d.\n",
528 bond->dev->name, new_value);
529 bond->params.arp_interval = new_value;
530 if (bond->params.arp_interval)
531 bond->dev->priv_flags |= IFF_MASTER_ARPMON;
532 if (bond->params.miimon) {
533 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
534 bond->dev->name, bond->dev->name);
535 bond->params.miimon = 0;
536 if (delayed_work_pending(&bond->mii_work)) {
537 cancel_delayed_work(&bond->mii_work);
538 flush_workqueue(bond->wq);
539 }
540 }
541 if (!bond->params.arp_targets[0]) {
542 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
543 bond->dev->name);
544 }
545 if (bond->dev->flags & IFF_UP) {
546 /* If the interface is up, we may need to fire off
547 * the ARP timer. If the interface is down, the
548 * timer will get fired off when the open function
549 * is called.
550 */
551 if (!delayed_work_pending(&bond->arp_work)) {
552 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
553 INIT_DELAYED_WORK(&bond->arp_work,
554 bond_activebackup_arp_mon);
555 else
556 INIT_DELAYED_WORK(&bond->arp_work,
557 bond_loadbalance_arp_mon);
558
559 queue_delayed_work(bond->wq, &bond->arp_work, 0);
560 }
561 }
562
563 out:
564 return ret;
565 }
566 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
567 bonding_show_arp_interval, bonding_store_arp_interval);
568
569 /*
570 * Show and set the arp targets.
571 */
572 static ssize_t bonding_show_arp_targets(struct device *d,
573 struct device_attribute *attr,
574 char *buf)
575 {
576 int i, res = 0;
577 struct bonding *bond = to_bond(d);
578
579 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
580 if (bond->params.arp_targets[i])
581 res += sprintf(buf + res, "%pI4 ",
582 &bond->params.arp_targets[i]);
583 }
584 if (res)
585 buf[res-1] = '\n'; /* eat the leftover space */
586 return res;
587 }
588
589 static ssize_t bonding_store_arp_targets(struct device *d,
590 struct device_attribute *attr,
591 const char *buf, size_t count)
592 {
593 __be32 newtarget;
594 int i = 0, done = 0, ret = count;
595 struct bonding *bond = to_bond(d);
596 __be32 *targets;
597
598 targets = bond->params.arp_targets;
599 newtarget = in_aton(buf + 1);
600 /* look for adds */
601 if (buf[0] == '+') {
602 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
603 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
604 bond->dev->name, &newtarget);
605 ret = -EINVAL;
606 goto out;
607 }
608 /* look for an empty slot to put the target in, and check for dupes */
609 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
610 if (targets[i] == newtarget) { /* duplicate */
611 pr_err("%s: ARP target %pI4 is already present\n",
612 bond->dev->name, &newtarget);
613 ret = -EINVAL;
614 goto out;
615 }
616 if (targets[i] == 0) {
617 pr_info("%s: adding ARP target %pI4.\n",
618 bond->dev->name, &newtarget);
619 done = 1;
620 targets[i] = newtarget;
621 }
622 }
623 if (!done) {
624 pr_err("%s: ARP target table is full!\n",
625 bond->dev->name);
626 ret = -EINVAL;
627 goto out;
628 }
629
630 } else if (buf[0] == '-') {
631 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
632 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
633 bond->dev->name, &newtarget);
634 ret = -EINVAL;
635 goto out;
636 }
637
638 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
639 if (targets[i] == newtarget) {
640 int j;
641 pr_info("%s: removing ARP target %pI4.\n",
642 bond->dev->name, &newtarget);
643 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
644 targets[j] = targets[j+1];
645
646 targets[j] = 0;
647 done = 1;
648 }
649 }
650 if (!done) {
651 pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
652 bond->dev->name, &newtarget);
653 ret = -EINVAL;
654 goto out;
655 }
656 } else {
657 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
658 bond->dev->name);
659 ret = -EPERM;
660 goto out;
661 }
662
663 out:
664 return ret;
665 }
666 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
667
668 /*
669 * Show and set the up and down delays. These must be multiples of the
670 * MII monitoring value, and are stored internally as the multiplier.
671 * Thus, we must translate to MS for the real world.
672 */
673 static ssize_t bonding_show_downdelay(struct device *d,
674 struct device_attribute *attr,
675 char *buf)
676 {
677 struct bonding *bond = to_bond(d);
678
679 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
680 }
681
682 static ssize_t bonding_store_downdelay(struct device *d,
683 struct device_attribute *attr,
684 const char *buf, size_t count)
685 {
686 int new_value, ret = count;
687 struct bonding *bond = to_bond(d);
688
689 if (!(bond->params.miimon)) {
690 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
691 bond->dev->name);
692 ret = -EPERM;
693 goto out;
694 }
695
696 if (sscanf(buf, "%d", &new_value) != 1) {
697 pr_err("%s: no down delay value specified.\n", bond->dev->name);
698 ret = -EINVAL;
699 goto out;
700 }
701 if (new_value < 0) {
702 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
703 bond->dev->name, new_value, 1, INT_MAX);
704 ret = -EINVAL;
705 goto out;
706 } else {
707 if ((new_value % bond->params.miimon) != 0) {
708 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
709 bond->dev->name, new_value,
710 bond->params.miimon,
711 (new_value / bond->params.miimon) *
712 bond->params.miimon);
713 }
714 bond->params.downdelay = new_value / bond->params.miimon;
715 pr_info("%s: Setting down delay to %d.\n",
716 bond->dev->name,
717 bond->params.downdelay * bond->params.miimon);
718
719 }
720
721 out:
722 return ret;
723 }
724 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
725 bonding_show_downdelay, bonding_store_downdelay);
726
727 static ssize_t bonding_show_updelay(struct device *d,
728 struct device_attribute *attr,
729 char *buf)
730 {
731 struct bonding *bond = to_bond(d);
732
733 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
734
735 }
736
737 static ssize_t bonding_store_updelay(struct device *d,
738 struct device_attribute *attr,
739 const char *buf, size_t count)
740 {
741 int new_value, ret = count;
742 struct bonding *bond = to_bond(d);
743
744 if (!(bond->params.miimon)) {
745 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
746 bond->dev->name);
747 ret = -EPERM;
748 goto out;
749 }
750
751 if (sscanf(buf, "%d", &new_value) != 1) {
752 pr_err("%s: no up delay value specified.\n",
753 bond->dev->name);
754 ret = -EINVAL;
755 goto out;
756 }
757 if (new_value < 0) {
758 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
759 bond->dev->name, new_value, 1, INT_MAX);
760 ret = -EINVAL;
761 goto out;
762 } else {
763 if ((new_value % bond->params.miimon) != 0) {
764 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
765 bond->dev->name, new_value,
766 bond->params.miimon,
767 (new_value / bond->params.miimon) *
768 bond->params.miimon);
769 }
770 bond->params.updelay = new_value / bond->params.miimon;
771 pr_info("%s: Setting up delay to %d.\n",
772 bond->dev->name,
773 bond->params.updelay * bond->params.miimon);
774 }
775
776 out:
777 return ret;
778 }
779 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
780 bonding_show_updelay, bonding_store_updelay);
781
782 /*
783 * Show and set the LACP interval. Interface must be down, and the mode
784 * must be set to 802.3ad mode.
785 */
786 static ssize_t bonding_show_lacp(struct device *d,
787 struct device_attribute *attr,
788 char *buf)
789 {
790 struct bonding *bond = to_bond(d);
791
792 return sprintf(buf, "%s %d\n",
793 bond_lacp_tbl[bond->params.lacp_fast].modename,
794 bond->params.lacp_fast);
795 }
796
797 static ssize_t bonding_store_lacp(struct device *d,
798 struct device_attribute *attr,
799 const char *buf, size_t count)
800 {
801 int new_value, ret = count;
802 struct bonding *bond = to_bond(d);
803
804 if (bond->dev->flags & IFF_UP) {
805 pr_err("%s: Unable to update LACP rate because interface is up.\n",
806 bond->dev->name);
807 ret = -EPERM;
808 goto out;
809 }
810
811 if (bond->params.mode != BOND_MODE_8023AD) {
812 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
813 bond->dev->name);
814 ret = -EPERM;
815 goto out;
816 }
817
818 new_value = bond_parse_parm(buf, bond_lacp_tbl);
819
820 if ((new_value == 1) || (new_value == 0)) {
821 bond->params.lacp_fast = new_value;
822 pr_info("%s: Setting LACP rate to %s (%d).\n",
823 bond->dev->name, bond_lacp_tbl[new_value].modename,
824 new_value);
825 } else {
826 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
827 bond->dev->name, (int)strlen(buf) - 1, buf);
828 ret = -EINVAL;
829 }
830 out:
831 return ret;
832 }
833 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
834 bonding_show_lacp, bonding_store_lacp);
835
836 static ssize_t bonding_show_ad_select(struct device *d,
837 struct device_attribute *attr,
838 char *buf)
839 {
840 struct bonding *bond = to_bond(d);
841
842 return sprintf(buf, "%s %d\n",
843 ad_select_tbl[bond->params.ad_select].modename,
844 bond->params.ad_select);
845 }
846
847
848 static ssize_t bonding_store_ad_select(struct device *d,
849 struct device_attribute *attr,
850 const char *buf, size_t count)
851 {
852 int new_value, ret = count;
853 struct bonding *bond = to_bond(d);
854
855 if (bond->dev->flags & IFF_UP) {
856 pr_err("%s: Unable to update ad_select because interface is up.\n",
857 bond->dev->name);
858 ret = -EPERM;
859 goto out;
860 }
861
862 new_value = bond_parse_parm(buf, ad_select_tbl);
863
864 if (new_value != -1) {
865 bond->params.ad_select = new_value;
866 pr_info("%s: Setting ad_select to %s (%d).\n",
867 bond->dev->name, ad_select_tbl[new_value].modename,
868 new_value);
869 } else {
870 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
871 bond->dev->name, (int)strlen(buf) - 1, buf);
872 ret = -EINVAL;
873 }
874 out:
875 return ret;
876 }
877 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
878 bonding_show_ad_select, bonding_store_ad_select);
879
880 /*
881 * Show and set the number of grat ARP to send after a failover event.
882 */
883 static ssize_t bonding_show_n_grat_arp(struct device *d,
884 struct device_attribute *attr,
885 char *buf)
886 {
887 struct bonding *bond = to_bond(d);
888
889 return sprintf(buf, "%d\n", bond->params.num_grat_arp);
890 }
891
892 static ssize_t bonding_store_n_grat_arp(struct device *d,
893 struct device_attribute *attr,
894 const char *buf, size_t count)
895 {
896 int new_value, ret = count;
897 struct bonding *bond = to_bond(d);
898
899 if (sscanf(buf, "%d", &new_value) != 1) {
900 pr_err("%s: no num_grat_arp value specified.\n",
901 bond->dev->name);
902 ret = -EINVAL;
903 goto out;
904 }
905 if (new_value < 0 || new_value > 255) {
906 pr_err("%s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
907 bond->dev->name, new_value);
908 ret = -EINVAL;
909 goto out;
910 } else {
911 bond->params.num_grat_arp = new_value;
912 }
913 out:
914 return ret;
915 }
916 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
917 bonding_show_n_grat_arp, bonding_store_n_grat_arp);
918
919 /*
920 * Show and set the number of unsolicited NA's to send after a failover event.
921 */
922 static ssize_t bonding_show_n_unsol_na(struct device *d,
923 struct device_attribute *attr,
924 char *buf)
925 {
926 struct bonding *bond = to_bond(d);
927
928 return sprintf(buf, "%d\n", bond->params.num_unsol_na);
929 }
930
931 static ssize_t bonding_store_n_unsol_na(struct device *d,
932 struct device_attribute *attr,
933 const char *buf, size_t count)
934 {
935 int new_value, ret = count;
936 struct bonding *bond = to_bond(d);
937
938 if (sscanf(buf, "%d", &new_value) != 1) {
939 pr_err("%s: no num_unsol_na value specified.\n",
940 bond->dev->name);
941 ret = -EINVAL;
942 goto out;
943 }
944
945 if (new_value < 0 || new_value > 255) {
946 pr_err("%s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
947 bond->dev->name, new_value);
948 ret = -EINVAL;
949 goto out;
950 } else
951 bond->params.num_unsol_na = new_value;
952 out:
953 return ret;
954 }
955 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
956 bonding_show_n_unsol_na, bonding_store_n_unsol_na);
957
958 /*
959 * Show and set the MII monitor interval. There are two tricky bits
960 * here. First, if MII monitoring is activated, then we must disable
961 * ARP monitoring. Second, if the timer isn't running, we must
962 * start it.
963 */
964 static ssize_t bonding_show_miimon(struct device *d,
965 struct device_attribute *attr,
966 char *buf)
967 {
968 struct bonding *bond = to_bond(d);
969
970 return sprintf(buf, "%d\n", bond->params.miimon);
971 }
972
973 static ssize_t bonding_store_miimon(struct device *d,
974 struct device_attribute *attr,
975 const char *buf, size_t count)
976 {
977 int new_value, ret = count;
978 struct bonding *bond = to_bond(d);
979
980 if (sscanf(buf, "%d", &new_value) != 1) {
981 pr_err("%s: no miimon value specified.\n",
982 bond->dev->name);
983 ret = -EINVAL;
984 goto out;
985 }
986 if (new_value < 0) {
987 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
988 bond->dev->name, new_value, 1, INT_MAX);
989 ret = -EINVAL;
990 goto out;
991 } else {
992 pr_info("%s: Setting MII monitoring interval to %d.\n",
993 bond->dev->name, new_value);
994 bond->params.miimon = new_value;
995 if (bond->params.updelay)
996 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
997 bond->dev->name,
998 bond->params.updelay * bond->params.miimon);
999 if (bond->params.downdelay)
1000 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
1001 bond->dev->name,
1002 bond->params.downdelay * bond->params.miimon);
1003 if (bond->params.arp_interval) {
1004 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
1005 bond->dev->name);
1006 bond->params.arp_interval = 0;
1007 bond->dev->priv_flags &= ~IFF_MASTER_ARPMON;
1008 if (bond->params.arp_validate) {
1009 bond_unregister_arp(bond);
1010 bond->params.arp_validate =
1011 BOND_ARP_VALIDATE_NONE;
1012 }
1013 if (delayed_work_pending(&bond->arp_work)) {
1014 cancel_delayed_work(&bond->arp_work);
1015 flush_workqueue(bond->wq);
1016 }
1017 }
1018
1019 if (bond->dev->flags & IFF_UP) {
1020 /* If the interface is up, we may need to fire off
1021 * the MII timer. If the interface is down, the
1022 * timer will get fired off when the open function
1023 * is called.
1024 */
1025 if (!delayed_work_pending(&bond->mii_work)) {
1026 INIT_DELAYED_WORK(&bond->mii_work,
1027 bond_mii_monitor);
1028 queue_delayed_work(bond->wq,
1029 &bond->mii_work, 0);
1030 }
1031 }
1032 }
1033 out:
1034 return ret;
1035 }
1036 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1037 bonding_show_miimon, bonding_store_miimon);
1038
1039 /*
1040 * Show and set the primary slave. The store function is much
1041 * simpler than bonding_store_slaves function because it only needs to
1042 * handle one interface name.
1043 * The bond must be a mode that supports a primary for this be
1044 * set.
1045 */
1046 static ssize_t bonding_show_primary(struct device *d,
1047 struct device_attribute *attr,
1048 char *buf)
1049 {
1050 int count = 0;
1051 struct bonding *bond = to_bond(d);
1052
1053 if (bond->primary_slave)
1054 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1055
1056 return count;
1057 }
1058
1059 static ssize_t bonding_store_primary(struct device *d,
1060 struct device_attribute *attr,
1061 const char *buf, size_t count)
1062 {
1063 int i;
1064 struct slave *slave;
1065 struct bonding *bond = to_bond(d);
1066
1067 if (!rtnl_trylock())
1068 return restart_syscall();
1069 block_netpoll_tx();
1070 read_lock(&bond->lock);
1071 write_lock_bh(&bond->curr_slave_lock);
1072
1073 if (!USES_PRIMARY(bond->params.mode)) {
1074 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1075 bond->dev->name, bond->dev->name, bond->params.mode);
1076 } else {
1077 bond_for_each_slave(bond, slave, i) {
1078 if (strnicmp
1079 (slave->dev->name, buf,
1080 strlen(slave->dev->name)) == 0) {
1081 pr_info("%s: Setting %s as primary slave.\n",
1082 bond->dev->name, slave->dev->name);
1083 bond->primary_slave = slave;
1084 strcpy(bond->params.primary, slave->dev->name);
1085 bond_select_active_slave(bond);
1086 goto out;
1087 }
1088 }
1089
1090 /* if we got here, then we didn't match the name of any slave */
1091
1092 if (strlen(buf) == 0 || buf[0] == '\n') {
1093 pr_info("%s: Setting primary slave to None.\n",
1094 bond->dev->name);
1095 bond->primary_slave = NULL;
1096 bond_select_active_slave(bond);
1097 } else {
1098 pr_info("%s: Unable to set %.*s as primary slave as it is not a slave.\n",
1099 bond->dev->name, (int)strlen(buf) - 1, buf);
1100 }
1101 }
1102 out:
1103 write_unlock_bh(&bond->curr_slave_lock);
1104 read_unlock(&bond->lock);
1105 unblock_netpoll_tx();
1106 rtnl_unlock();
1107
1108 return count;
1109 }
1110 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1111 bonding_show_primary, bonding_store_primary);
1112
1113 /*
1114 * Show and set the primary_reselect flag.
1115 */
1116 static ssize_t bonding_show_primary_reselect(struct device *d,
1117 struct device_attribute *attr,
1118 char *buf)
1119 {
1120 struct bonding *bond = to_bond(d);
1121
1122 return sprintf(buf, "%s %d\n",
1123 pri_reselect_tbl[bond->params.primary_reselect].modename,
1124 bond->params.primary_reselect);
1125 }
1126
1127 static ssize_t bonding_store_primary_reselect(struct device *d,
1128 struct device_attribute *attr,
1129 const char *buf, size_t count)
1130 {
1131 int new_value, ret = count;
1132 struct bonding *bond = to_bond(d);
1133
1134 if (!rtnl_trylock())
1135 return restart_syscall();
1136
1137 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1138 if (new_value < 0) {
1139 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1140 bond->dev->name,
1141 (int) strlen(buf) - 1, buf);
1142 ret = -EINVAL;
1143 goto out;
1144 }
1145
1146 bond->params.primary_reselect = new_value;
1147 pr_info("%s: setting primary_reselect to %s (%d).\n",
1148 bond->dev->name, pri_reselect_tbl[new_value].modename,
1149 new_value);
1150
1151 block_netpoll_tx();
1152 read_lock(&bond->lock);
1153 write_lock_bh(&bond->curr_slave_lock);
1154 bond_select_active_slave(bond);
1155 write_unlock_bh(&bond->curr_slave_lock);
1156 read_unlock(&bond->lock);
1157 unblock_netpoll_tx();
1158 out:
1159 rtnl_unlock();
1160 return ret;
1161 }
1162 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1163 bonding_show_primary_reselect,
1164 bonding_store_primary_reselect);
1165
1166 /*
1167 * Show and set the use_carrier flag.
1168 */
1169 static ssize_t bonding_show_carrier(struct device *d,
1170 struct device_attribute *attr,
1171 char *buf)
1172 {
1173 struct bonding *bond = to_bond(d);
1174
1175 return sprintf(buf, "%d\n", bond->params.use_carrier);
1176 }
1177
1178 static ssize_t bonding_store_carrier(struct device *d,
1179 struct device_attribute *attr,
1180 const char *buf, size_t count)
1181 {
1182 int new_value, ret = count;
1183 struct bonding *bond = to_bond(d);
1184
1185
1186 if (sscanf(buf, "%d", &new_value) != 1) {
1187 pr_err("%s: no use_carrier value specified.\n",
1188 bond->dev->name);
1189 ret = -EINVAL;
1190 goto out;
1191 }
1192 if ((new_value == 0) || (new_value == 1)) {
1193 bond->params.use_carrier = new_value;
1194 pr_info("%s: Setting use_carrier to %d.\n",
1195 bond->dev->name, new_value);
1196 } else {
1197 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1198 bond->dev->name, new_value);
1199 }
1200 out:
1201 return count;
1202 }
1203 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1204 bonding_show_carrier, bonding_store_carrier);
1205
1206
1207 /*
1208 * Show and set currently active_slave.
1209 */
1210 static ssize_t bonding_show_active_slave(struct device *d,
1211 struct device_attribute *attr,
1212 char *buf)
1213 {
1214 struct slave *curr;
1215 struct bonding *bond = to_bond(d);
1216 int count = 0;
1217
1218 read_lock(&bond->curr_slave_lock);
1219 curr = bond->curr_active_slave;
1220 read_unlock(&bond->curr_slave_lock);
1221
1222 if (USES_PRIMARY(bond->params.mode) && curr)
1223 count = sprintf(buf, "%s\n", curr->dev->name);
1224 return count;
1225 }
1226
1227 static ssize_t bonding_store_active_slave(struct device *d,
1228 struct device_attribute *attr,
1229 const char *buf, size_t count)
1230 {
1231 int i;
1232 struct slave *slave;
1233 struct slave *old_active = NULL;
1234 struct slave *new_active = NULL;
1235 struct bonding *bond = to_bond(d);
1236
1237 if (!rtnl_trylock())
1238 return restart_syscall();
1239
1240 block_netpoll_tx();
1241 read_lock(&bond->lock);
1242 write_lock_bh(&bond->curr_slave_lock);
1243
1244 if (!USES_PRIMARY(bond->params.mode))
1245 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1246 bond->dev->name, bond->dev->name, bond->params.mode);
1247 else {
1248 bond_for_each_slave(bond, slave, i) {
1249 if (strnicmp
1250 (slave->dev->name, buf,
1251 strlen(slave->dev->name)) == 0) {
1252 old_active = bond->curr_active_slave;
1253 new_active = slave;
1254 if (new_active == old_active) {
1255 /* do nothing */
1256 pr_info("%s: %s is already the current active slave.\n",
1257 bond->dev->name,
1258 slave->dev->name);
1259 goto out;
1260 }
1261 else {
1262 if ((new_active) &&
1263 (old_active) &&
1264 (new_active->link == BOND_LINK_UP) &&
1265 IS_UP(new_active->dev)) {
1266 pr_info("%s: Setting %s as active slave.\n",
1267 bond->dev->name,
1268 slave->dev->name);
1269 bond_change_active_slave(bond, new_active);
1270 }
1271 else {
1272 pr_info("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
1273 bond->dev->name,
1274 slave->dev->name,
1275 slave->dev->name);
1276 }
1277 goto out;
1278 }
1279 }
1280 }
1281
1282 /* if we got here, then we didn't match the name of any slave */
1283
1284 if (strlen(buf) == 0 || buf[0] == '\n') {
1285 pr_info("%s: Setting active slave to None.\n",
1286 bond->dev->name);
1287 bond->primary_slave = NULL;
1288 bond_select_active_slave(bond);
1289 } else {
1290 pr_info("%s: Unable to set %.*s as active slave as it is not a slave.\n",
1291 bond->dev->name, (int)strlen(buf) - 1, buf);
1292 }
1293 }
1294 out:
1295 write_unlock_bh(&bond->curr_slave_lock);
1296 read_unlock(&bond->lock);
1297 unblock_netpoll_tx();
1298
1299 rtnl_unlock();
1300
1301 return count;
1302
1303 }
1304 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1305 bonding_show_active_slave, bonding_store_active_slave);
1306
1307
1308 /*
1309 * Show link status of the bond interface.
1310 */
1311 static ssize_t bonding_show_mii_status(struct device *d,
1312 struct device_attribute *attr,
1313 char *buf)
1314 {
1315 struct slave *curr;
1316 struct bonding *bond = to_bond(d);
1317
1318 read_lock(&bond->curr_slave_lock);
1319 curr = bond->curr_active_slave;
1320 read_unlock(&bond->curr_slave_lock);
1321
1322 return sprintf(buf, "%s\n", curr ? "up" : "down");
1323 }
1324 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1325
1326
1327 /*
1328 * Show current 802.3ad aggregator ID.
1329 */
1330 static ssize_t bonding_show_ad_aggregator(struct device *d,
1331 struct device_attribute *attr,
1332 char *buf)
1333 {
1334 int count = 0;
1335 struct bonding *bond = to_bond(d);
1336
1337 if (bond->params.mode == BOND_MODE_8023AD) {
1338 struct ad_info ad_info;
1339 count = sprintf(buf, "%d\n",
1340 (bond_3ad_get_active_agg_info(bond, &ad_info))
1341 ? 0 : ad_info.aggregator_id);
1342 }
1343
1344 return count;
1345 }
1346 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1347
1348
1349 /*
1350 * Show number of active 802.3ad ports.
1351 */
1352 static ssize_t bonding_show_ad_num_ports(struct device *d,
1353 struct device_attribute *attr,
1354 char *buf)
1355 {
1356 int count = 0;
1357 struct bonding *bond = to_bond(d);
1358
1359 if (bond->params.mode == BOND_MODE_8023AD) {
1360 struct ad_info ad_info;
1361 count = sprintf(buf, "%d\n",
1362 (bond_3ad_get_active_agg_info(bond, &ad_info))
1363 ? 0 : ad_info.ports);
1364 }
1365
1366 return count;
1367 }
1368 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1369
1370
1371 /*
1372 * Show current 802.3ad actor key.
1373 */
1374 static ssize_t bonding_show_ad_actor_key(struct device *d,
1375 struct device_attribute *attr,
1376 char *buf)
1377 {
1378 int count = 0;
1379 struct bonding *bond = to_bond(d);
1380
1381 if (bond->params.mode == BOND_MODE_8023AD) {
1382 struct ad_info ad_info;
1383 count = sprintf(buf, "%d\n",
1384 (bond_3ad_get_active_agg_info(bond, &ad_info))
1385 ? 0 : ad_info.actor_key);
1386 }
1387
1388 return count;
1389 }
1390 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1391
1392
1393 /*
1394 * Show current 802.3ad partner key.
1395 */
1396 static ssize_t bonding_show_ad_partner_key(struct device *d,
1397 struct device_attribute *attr,
1398 char *buf)
1399 {
1400 int count = 0;
1401 struct bonding *bond = to_bond(d);
1402
1403 if (bond->params.mode == BOND_MODE_8023AD) {
1404 struct ad_info ad_info;
1405 count = sprintf(buf, "%d\n",
1406 (bond_3ad_get_active_agg_info(bond, &ad_info))
1407 ? 0 : ad_info.partner_key);
1408 }
1409
1410 return count;
1411 }
1412 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1413
1414
1415 /*
1416 * Show current 802.3ad partner mac.
1417 */
1418 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1419 struct device_attribute *attr,
1420 char *buf)
1421 {
1422 int count = 0;
1423 struct bonding *bond = to_bond(d);
1424
1425 if (bond->params.mode == BOND_MODE_8023AD) {
1426 struct ad_info ad_info;
1427 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1428 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1429 }
1430
1431 return count;
1432 }
1433 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1434
1435 /*
1436 * Show the queue_ids of the slaves in the current bond.
1437 */
1438 static ssize_t bonding_show_queue_id(struct device *d,
1439 struct device_attribute *attr,
1440 char *buf)
1441 {
1442 struct slave *slave;
1443 int i, res = 0;
1444 struct bonding *bond = to_bond(d);
1445
1446 if (!rtnl_trylock())
1447 return restart_syscall();
1448
1449 read_lock(&bond->lock);
1450 bond_for_each_slave(bond, slave, i) {
1451 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1452 /* not enough space for another interface_name:queue_id pair */
1453 if ((PAGE_SIZE - res) > 10)
1454 res = PAGE_SIZE - 10;
1455 res += sprintf(buf + res, "++more++ ");
1456 break;
1457 }
1458 res += sprintf(buf + res, "%s:%d ",
1459 slave->dev->name, slave->queue_id);
1460 }
1461 read_unlock(&bond->lock);
1462 if (res)
1463 buf[res-1] = '\n'; /* eat the leftover space */
1464 rtnl_unlock();
1465 return res;
1466 }
1467
1468 /*
1469 * Set the queue_ids of the slaves in the current bond. The bond
1470 * interface must be enslaved for this to work.
1471 */
1472 static ssize_t bonding_store_queue_id(struct device *d,
1473 struct device_attribute *attr,
1474 const char *buffer, size_t count)
1475 {
1476 struct slave *slave, *update_slave;
1477 struct bonding *bond = to_bond(d);
1478 u16 qid;
1479 int i, ret = count;
1480 char *delim;
1481 struct net_device *sdev = NULL;
1482
1483 if (!rtnl_trylock())
1484 return restart_syscall();
1485
1486 /* delim will point to queue id if successful */
1487 delim = strchr(buffer, ':');
1488 if (!delim)
1489 goto err_no_cmd;
1490
1491 /*
1492 * Terminate string that points to device name and bump it
1493 * up one, so we can read the queue id there.
1494 */
1495 *delim = '\0';
1496 if (sscanf(++delim, "%hd\n", &qid) != 1)
1497 goto err_no_cmd;
1498
1499 /* Check buffer length, valid ifname and queue id */
1500 if (strlen(buffer) > IFNAMSIZ ||
1501 !dev_valid_name(buffer) ||
1502 qid > bond->params.tx_queues)
1503 goto err_no_cmd;
1504
1505 /* Get the pointer to that interface if it exists */
1506 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1507 if (!sdev)
1508 goto err_no_cmd;
1509
1510 read_lock(&bond->lock);
1511
1512 /* Search for thes slave and check for duplicate qids */
1513 update_slave = NULL;
1514 bond_for_each_slave(bond, slave, i) {
1515 if (sdev == slave->dev)
1516 /*
1517 * We don't need to check the matching
1518 * slave for dups, since we're overwriting it
1519 */
1520 update_slave = slave;
1521 else if (qid && qid == slave->queue_id) {
1522 goto err_no_cmd_unlock;
1523 }
1524 }
1525
1526 if (!update_slave)
1527 goto err_no_cmd_unlock;
1528
1529 /* Actually set the qids for the slave */
1530 update_slave->queue_id = qid;
1531
1532 read_unlock(&bond->lock);
1533 out:
1534 rtnl_unlock();
1535 return ret;
1536
1537 err_no_cmd_unlock:
1538 read_unlock(&bond->lock);
1539 err_no_cmd:
1540 pr_info("invalid input for queue_id set for %s.\n",
1541 bond->dev->name);
1542 ret = -EPERM;
1543 goto out;
1544 }
1545
1546 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1547 bonding_store_queue_id);
1548
1549
1550 /*
1551 * Show and set the all_slaves_active flag.
1552 */
1553 static ssize_t bonding_show_slaves_active(struct device *d,
1554 struct device_attribute *attr,
1555 char *buf)
1556 {
1557 struct bonding *bond = to_bond(d);
1558
1559 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1560 }
1561
1562 static ssize_t bonding_store_slaves_active(struct device *d,
1563 struct device_attribute *attr,
1564 const char *buf, size_t count)
1565 {
1566 int i, new_value, ret = count;
1567 struct bonding *bond = to_bond(d);
1568 struct slave *slave;
1569
1570 if (sscanf(buf, "%d", &new_value) != 1) {
1571 pr_err("%s: no all_slaves_active value specified.\n",
1572 bond->dev->name);
1573 ret = -EINVAL;
1574 goto out;
1575 }
1576
1577 if (new_value == bond->params.all_slaves_active)
1578 goto out;
1579
1580 if ((new_value == 0) || (new_value == 1)) {
1581 bond->params.all_slaves_active = new_value;
1582 } else {
1583 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1584 bond->dev->name, new_value);
1585 ret = -EINVAL;
1586 goto out;
1587 }
1588
1589 bond_for_each_slave(bond, slave, i) {
1590 if (slave->state == BOND_STATE_BACKUP) {
1591 if (new_value)
1592 slave->dev->priv_flags &= ~IFF_SLAVE_INACTIVE;
1593 else
1594 slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
1595 }
1596 }
1597 out:
1598 return count;
1599 }
1600 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1601 bonding_show_slaves_active, bonding_store_slaves_active);
1602
1603 /*
1604 * Show and set the number of IGMP membership reports to send on link failure
1605 */
1606 static ssize_t bonding_show_resend_igmp(struct device *d,
1607 struct device_attribute *attr,
1608 char *buf)
1609 {
1610 struct bonding *bond = to_bond(d);
1611
1612 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1613 }
1614
1615 static ssize_t bonding_store_resend_igmp(struct device *d,
1616 struct device_attribute *attr,
1617 const char *buf, size_t count)
1618 {
1619 int new_value, ret = count;
1620 struct bonding *bond = to_bond(d);
1621
1622 if (sscanf(buf, "%d", &new_value) != 1) {
1623 pr_err("%s: no resend_igmp value specified.\n",
1624 bond->dev->name);
1625 ret = -EINVAL;
1626 goto out;
1627 }
1628
1629 if (new_value < 0) {
1630 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1631 bond->dev->name, new_value);
1632 ret = -EINVAL;
1633 goto out;
1634 }
1635
1636 pr_info("%s: Setting resend_igmp to %d.\n",
1637 bond->dev->name, new_value);
1638 bond->params.resend_igmp = new_value;
1639 out:
1640 return ret;
1641 }
1642
1643 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1644 bonding_show_resend_igmp, bonding_store_resend_igmp);
1645
1646 static struct attribute *per_bond_attrs[] = {
1647 &dev_attr_slaves.attr,
1648 &dev_attr_mode.attr,
1649 &dev_attr_fail_over_mac.attr,
1650 &dev_attr_arp_validate.attr,
1651 &dev_attr_arp_interval.attr,
1652 &dev_attr_arp_ip_target.attr,
1653 &dev_attr_downdelay.attr,
1654 &dev_attr_updelay.attr,
1655 &dev_attr_lacp_rate.attr,
1656 &dev_attr_ad_select.attr,
1657 &dev_attr_xmit_hash_policy.attr,
1658 &dev_attr_num_grat_arp.attr,
1659 &dev_attr_num_unsol_na.attr,
1660 &dev_attr_miimon.attr,
1661 &dev_attr_primary.attr,
1662 &dev_attr_primary_reselect.attr,
1663 &dev_attr_use_carrier.attr,
1664 &dev_attr_active_slave.attr,
1665 &dev_attr_mii_status.attr,
1666 &dev_attr_ad_aggregator.attr,
1667 &dev_attr_ad_num_ports.attr,
1668 &dev_attr_ad_actor_key.attr,
1669 &dev_attr_ad_partner_key.attr,
1670 &dev_attr_ad_partner_mac.attr,
1671 &dev_attr_queue_id.attr,
1672 &dev_attr_all_slaves_active.attr,
1673 &dev_attr_resend_igmp.attr,
1674 NULL,
1675 };
1676
1677 static struct attribute_group bonding_group = {
1678 .name = "bonding",
1679 .attrs = per_bond_attrs,
1680 };
1681
1682 /*
1683 * Initialize sysfs. This sets up the bonding_masters file in
1684 * /sys/class/net.
1685 */
1686 int bond_create_sysfs(void)
1687 {
1688 int ret;
1689
1690 ret = netdev_class_create_file(&class_attr_bonding_masters);
1691 /*
1692 * Permit multiple loads of the module by ignoring failures to
1693 * create the bonding_masters sysfs file. Bonding devices
1694 * created by second or subsequent loads of the module will
1695 * not be listed in, or controllable by, bonding_masters, but
1696 * will have the usual "bonding" sysfs directory.
1697 *
1698 * This is done to preserve backwards compatibility for
1699 * initscripts/sysconfig, which load bonding multiple times to
1700 * configure multiple bonding devices.
1701 */
1702 if (ret == -EEXIST) {
1703 /* Is someone being kinky and naming a device bonding_master? */
1704 if (__dev_get_by_name(&init_net,
1705 class_attr_bonding_masters.attr.name))
1706 pr_err("network device named %s already exists in sysfs",
1707 class_attr_bonding_masters.attr.name);
1708 ret = 0;
1709 }
1710
1711 return ret;
1712
1713 }
1714
1715 /*
1716 * Remove /sys/class/net/bonding_masters.
1717 */
1718 void bond_destroy_sysfs(void)
1719 {
1720 netdev_class_remove_file(&class_attr_bonding_masters);
1721 }
1722
1723 /*
1724 * Initialize sysfs for each bond. This sets up and registers
1725 * the 'bondctl' directory for each individual bond under /sys/class/net.
1726 */
1727 void bond_prepare_sysfs_group(struct bonding *bond)
1728 {
1729 bond->dev->sysfs_groups[0] = &bonding_group;
1730 }
1731
Linux kernel - Deliverables
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