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Merge branch 'urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile...
[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 read_lock(&bond->lock);
1070 write_lock_bh(&bond->curr_slave_lock);
1071
1072 if (!USES_PRIMARY(bond->params.mode)) {
1073 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1074 bond->dev->name, bond->dev->name, bond->params.mode);
1075 } else {
1076 bond_for_each_slave(bond, slave, i) {
1077 if (strnicmp
1078 (slave->dev->name, buf,
1079 strlen(slave->dev->name)) == 0) {
1080 pr_info("%s: Setting %s as primary slave.\n",
1081 bond->dev->name, slave->dev->name);
1082 bond->primary_slave = slave;
1083 strcpy(bond->params.primary, slave->dev->name);
1084 bond_select_active_slave(bond);
1085 goto out;
1086 }
1087 }
1088
1089 /* if we got here, then we didn't match the name of any slave */
1090
1091 if (strlen(buf) == 0 || buf[0] == '\n') {
1092 pr_info("%s: Setting primary slave to None.\n",
1093 bond->dev->name);
1094 bond->primary_slave = NULL;
1095 bond_select_active_slave(bond);
1096 } else {
1097 pr_info("%s: Unable to set %.*s as primary slave as it is not a slave.\n",
1098 bond->dev->name, (int)strlen(buf) - 1, buf);
1099 }
1100 }
1101 out:
1102 write_unlock_bh(&bond->curr_slave_lock);
1103 read_unlock(&bond->lock);
1104 rtnl_unlock();
1105
1106 return count;
1107 }
1108 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1109 bonding_show_primary, bonding_store_primary);
1110
1111 /*
1112 * Show and set the primary_reselect flag.
1113 */
1114 static ssize_t bonding_show_primary_reselect(struct device *d,
1115 struct device_attribute *attr,
1116 char *buf)
1117 {
1118 struct bonding *bond = to_bond(d);
1119
1120 return sprintf(buf, "%s %d\n",
1121 pri_reselect_tbl[bond->params.primary_reselect].modename,
1122 bond->params.primary_reselect);
1123 }
1124
1125 static ssize_t bonding_store_primary_reselect(struct device *d,
1126 struct device_attribute *attr,
1127 const char *buf, size_t count)
1128 {
1129 int new_value, ret = count;
1130 struct bonding *bond = to_bond(d);
1131
1132 if (!rtnl_trylock())
1133 return restart_syscall();
1134
1135 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1136 if (new_value < 0) {
1137 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1138 bond->dev->name,
1139 (int) strlen(buf) - 1, buf);
1140 ret = -EINVAL;
1141 goto out;
1142 }
1143
1144 bond->params.primary_reselect = new_value;
1145 pr_info("%s: setting primary_reselect to %s (%d).\n",
1146 bond->dev->name, pri_reselect_tbl[new_value].modename,
1147 new_value);
1148
1149 read_lock(&bond->lock);
1150 write_lock_bh(&bond->curr_slave_lock);
1151 bond_select_active_slave(bond);
1152 write_unlock_bh(&bond->curr_slave_lock);
1153 read_unlock(&bond->lock);
1154 out:
1155 rtnl_unlock();
1156 return ret;
1157 }
1158 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1159 bonding_show_primary_reselect,
1160 bonding_store_primary_reselect);
1161
1162 /*
1163 * Show and set the use_carrier flag.
1164 */
1165 static ssize_t bonding_show_carrier(struct device *d,
1166 struct device_attribute *attr,
1167 char *buf)
1168 {
1169 struct bonding *bond = to_bond(d);
1170
1171 return sprintf(buf, "%d\n", bond->params.use_carrier);
1172 }
1173
1174 static ssize_t bonding_store_carrier(struct device *d,
1175 struct device_attribute *attr,
1176 const char *buf, size_t count)
1177 {
1178 int new_value, ret = count;
1179 struct bonding *bond = to_bond(d);
1180
1181
1182 if (sscanf(buf, "%d", &new_value) != 1) {
1183 pr_err("%s: no use_carrier value specified.\n",
1184 bond->dev->name);
1185 ret = -EINVAL;
1186 goto out;
1187 }
1188 if ((new_value == 0) || (new_value == 1)) {
1189 bond->params.use_carrier = new_value;
1190 pr_info("%s: Setting use_carrier to %d.\n",
1191 bond->dev->name, new_value);
1192 } else {
1193 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1194 bond->dev->name, new_value);
1195 }
1196 out:
1197 return count;
1198 }
1199 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1200 bonding_show_carrier, bonding_store_carrier);
1201
1202
1203 /*
1204 * Show and set currently active_slave.
1205 */
1206 static ssize_t bonding_show_active_slave(struct device *d,
1207 struct device_attribute *attr,
1208 char *buf)
1209 {
1210 struct slave *curr;
1211 struct bonding *bond = to_bond(d);
1212 int count = 0;
1213
1214 read_lock(&bond->curr_slave_lock);
1215 curr = bond->curr_active_slave;
1216 read_unlock(&bond->curr_slave_lock);
1217
1218 if (USES_PRIMARY(bond->params.mode) && curr)
1219 count = sprintf(buf, "%s\n", curr->dev->name);
1220 return count;
1221 }
1222
1223 static ssize_t bonding_store_active_slave(struct device *d,
1224 struct device_attribute *attr,
1225 const char *buf, size_t count)
1226 {
1227 int i;
1228 struct slave *slave;
1229 struct slave *old_active = NULL;
1230 struct slave *new_active = NULL;
1231 struct bonding *bond = to_bond(d);
1232
1233 if (!rtnl_trylock())
1234 return restart_syscall();
1235 read_lock(&bond->lock);
1236 write_lock_bh(&bond->curr_slave_lock);
1237
1238 if (!USES_PRIMARY(bond->params.mode))
1239 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1240 bond->dev->name, bond->dev->name, bond->params.mode);
1241 else {
1242 bond_for_each_slave(bond, slave, i) {
1243 if (strnicmp
1244 (slave->dev->name, buf,
1245 strlen(slave->dev->name)) == 0) {
1246 old_active = bond->curr_active_slave;
1247 new_active = slave;
1248 if (new_active == old_active) {
1249 /* do nothing */
1250 pr_info("%s: %s is already the current active slave.\n",
1251 bond->dev->name,
1252 slave->dev->name);
1253 goto out;
1254 }
1255 else {
1256 if ((new_active) &&
1257 (old_active) &&
1258 (new_active->link == BOND_LINK_UP) &&
1259 IS_UP(new_active->dev)) {
1260 pr_info("%s: Setting %s as active slave.\n",
1261 bond->dev->name,
1262 slave->dev->name);
1263 bond_change_active_slave(bond, new_active);
1264 }
1265 else {
1266 pr_info("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
1267 bond->dev->name,
1268 slave->dev->name,
1269 slave->dev->name);
1270 }
1271 goto out;
1272 }
1273 }
1274 }
1275
1276 /* if we got here, then we didn't match the name of any slave */
1277
1278 if (strlen(buf) == 0 || buf[0] == '\n') {
1279 pr_info("%s: Setting active slave to None.\n",
1280 bond->dev->name);
1281 bond->primary_slave = NULL;
1282 bond_select_active_slave(bond);
1283 } else {
1284 pr_info("%s: Unable to set %.*s as active slave as it is not a slave.\n",
1285 bond->dev->name, (int)strlen(buf) - 1, buf);
1286 }
1287 }
1288 out:
1289 write_unlock_bh(&bond->curr_slave_lock);
1290 read_unlock(&bond->lock);
1291 rtnl_unlock();
1292
1293 return count;
1294
1295 }
1296 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1297 bonding_show_active_slave, bonding_store_active_slave);
1298
1299
1300 /*
1301 * Show link status of the bond interface.
1302 */
1303 static ssize_t bonding_show_mii_status(struct device *d,
1304 struct device_attribute *attr,
1305 char *buf)
1306 {
1307 struct slave *curr;
1308 struct bonding *bond = to_bond(d);
1309
1310 read_lock(&bond->curr_slave_lock);
1311 curr = bond->curr_active_slave;
1312 read_unlock(&bond->curr_slave_lock);
1313
1314 return sprintf(buf, "%s\n", curr ? "up" : "down");
1315 }
1316 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1317
1318
1319 /*
1320 * Show current 802.3ad aggregator ID.
1321 */
1322 static ssize_t bonding_show_ad_aggregator(struct device *d,
1323 struct device_attribute *attr,
1324 char *buf)
1325 {
1326 int count = 0;
1327 struct bonding *bond = to_bond(d);
1328
1329 if (bond->params.mode == BOND_MODE_8023AD) {
1330 struct ad_info ad_info;
1331 count = sprintf(buf, "%d\n",
1332 (bond_3ad_get_active_agg_info(bond, &ad_info))
1333 ? 0 : ad_info.aggregator_id);
1334 }
1335
1336 return count;
1337 }
1338 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1339
1340
1341 /*
1342 * Show number of active 802.3ad ports.
1343 */
1344 static ssize_t bonding_show_ad_num_ports(struct device *d,
1345 struct device_attribute *attr,
1346 char *buf)
1347 {
1348 int count = 0;
1349 struct bonding *bond = to_bond(d);
1350
1351 if (bond->params.mode == BOND_MODE_8023AD) {
1352 struct ad_info ad_info;
1353 count = sprintf(buf, "%d\n",
1354 (bond_3ad_get_active_agg_info(bond, &ad_info))
1355 ? 0 : ad_info.ports);
1356 }
1357
1358 return count;
1359 }
1360 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1361
1362
1363 /*
1364 * Show current 802.3ad actor key.
1365 */
1366 static ssize_t bonding_show_ad_actor_key(struct device *d,
1367 struct device_attribute *attr,
1368 char *buf)
1369 {
1370 int count = 0;
1371 struct bonding *bond = to_bond(d);
1372
1373 if (bond->params.mode == BOND_MODE_8023AD) {
1374 struct ad_info ad_info;
1375 count = sprintf(buf, "%d\n",
1376 (bond_3ad_get_active_agg_info(bond, &ad_info))
1377 ? 0 : ad_info.actor_key);
1378 }
1379
1380 return count;
1381 }
1382 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1383
1384
1385 /*
1386 * Show current 802.3ad partner key.
1387 */
1388 static ssize_t bonding_show_ad_partner_key(struct device *d,
1389 struct device_attribute *attr,
1390 char *buf)
1391 {
1392 int count = 0;
1393 struct bonding *bond = to_bond(d);
1394
1395 if (bond->params.mode == BOND_MODE_8023AD) {
1396 struct ad_info ad_info;
1397 count = sprintf(buf, "%d\n",
1398 (bond_3ad_get_active_agg_info(bond, &ad_info))
1399 ? 0 : ad_info.partner_key);
1400 }
1401
1402 return count;
1403 }
1404 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1405
1406
1407 /*
1408 * Show current 802.3ad partner mac.
1409 */
1410 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1411 struct device_attribute *attr,
1412 char *buf)
1413 {
1414 int count = 0;
1415 struct bonding *bond = to_bond(d);
1416
1417 if (bond->params.mode == BOND_MODE_8023AD) {
1418 struct ad_info ad_info;
1419 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1420 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1421 }
1422
1423 return count;
1424 }
1425 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1426
1427 /*
1428 * Show the queue_ids of the slaves in the current bond.
1429 */
1430 static ssize_t bonding_show_queue_id(struct device *d,
1431 struct device_attribute *attr,
1432 char *buf)
1433 {
1434 struct slave *slave;
1435 int i, res = 0;
1436 struct bonding *bond = to_bond(d);
1437
1438 if (!rtnl_trylock())
1439 return restart_syscall();
1440
1441 read_lock(&bond->lock);
1442 bond_for_each_slave(bond, slave, i) {
1443 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1444 /* not enough space for another interface_name:queue_id pair */
1445 if ((PAGE_SIZE - res) > 10)
1446 res = PAGE_SIZE - 10;
1447 res += sprintf(buf + res, "++more++ ");
1448 break;
1449 }
1450 res += sprintf(buf + res, "%s:%d ",
1451 slave->dev->name, slave->queue_id);
1452 }
1453 read_unlock(&bond->lock);
1454 if (res)
1455 buf[res-1] = '\n'; /* eat the leftover space */
1456 rtnl_unlock();
1457 return res;
1458 }
1459
1460 /*
1461 * Set the queue_ids of the slaves in the current bond. The bond
1462 * interface must be enslaved for this to work.
1463 */
1464 static ssize_t bonding_store_queue_id(struct device *d,
1465 struct device_attribute *attr,
1466 const char *buffer, size_t count)
1467 {
1468 struct slave *slave, *update_slave;
1469 struct bonding *bond = to_bond(d);
1470 u16 qid;
1471 int i, ret = count;
1472 char *delim;
1473 struct net_device *sdev = NULL;
1474
1475 if (!rtnl_trylock())
1476 return restart_syscall();
1477
1478 /* delim will point to queue id if successful */
1479 delim = strchr(buffer, ':');
1480 if (!delim)
1481 goto err_no_cmd;
1482
1483 /*
1484 * Terminate string that points to device name and bump it
1485 * up one, so we can read the queue id there.
1486 */
1487 *delim = '\0';
1488 if (sscanf(++delim, "%hd\n", &qid) != 1)
1489 goto err_no_cmd;
1490
1491 /* Check buffer length, valid ifname and queue id */
1492 if (strlen(buffer) > IFNAMSIZ ||
1493 !dev_valid_name(buffer) ||
1494 qid > bond->params.tx_queues)
1495 goto err_no_cmd;
1496
1497 /* Get the pointer to that interface if it exists */
1498 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1499 if (!sdev)
1500 goto err_no_cmd;
1501
1502 read_lock(&bond->lock);
1503
1504 /* Search for thes slave and check for duplicate qids */
1505 update_slave = NULL;
1506 bond_for_each_slave(bond, slave, i) {
1507 if (sdev == slave->dev)
1508 /*
1509 * We don't need to check the matching
1510 * slave for dups, since we're overwriting it
1511 */
1512 update_slave = slave;
1513 else if (qid && qid == slave->queue_id) {
1514 goto err_no_cmd_unlock;
1515 }
1516 }
1517
1518 if (!update_slave)
1519 goto err_no_cmd_unlock;
1520
1521 /* Actually set the qids for the slave */
1522 update_slave->queue_id = qid;
1523
1524 read_unlock(&bond->lock);
1525 out:
1526 rtnl_unlock();
1527 return ret;
1528
1529 err_no_cmd_unlock:
1530 read_unlock(&bond->lock);
1531 err_no_cmd:
1532 pr_info("invalid input for queue_id set for %s.\n",
1533 bond->dev->name);
1534 ret = -EPERM;
1535 goto out;
1536 }
1537
1538 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1539 bonding_store_queue_id);
1540
1541
1542 /*
1543 * Show and set the all_slaves_active flag.
1544 */
1545 static ssize_t bonding_show_slaves_active(struct device *d,
1546 struct device_attribute *attr,
1547 char *buf)
1548 {
1549 struct bonding *bond = to_bond(d);
1550
1551 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1552 }
1553
1554 static ssize_t bonding_store_slaves_active(struct device *d,
1555 struct device_attribute *attr,
1556 const char *buf, size_t count)
1557 {
1558 int i, new_value, ret = count;
1559 struct bonding *bond = to_bond(d);
1560 struct slave *slave;
1561
1562 if (sscanf(buf, "%d", &new_value) != 1) {
1563 pr_err("%s: no all_slaves_active value specified.\n",
1564 bond->dev->name);
1565 ret = -EINVAL;
1566 goto out;
1567 }
1568
1569 if (new_value == bond->params.all_slaves_active)
1570 goto out;
1571
1572 if ((new_value == 0) || (new_value == 1)) {
1573 bond->params.all_slaves_active = new_value;
1574 } else {
1575 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1576 bond->dev->name, new_value);
1577 ret = -EINVAL;
1578 goto out;
1579 }
1580
1581 bond_for_each_slave(bond, slave, i) {
1582 if (slave->state == BOND_STATE_BACKUP) {
1583 if (new_value)
1584 slave->dev->priv_flags &= ~IFF_SLAVE_INACTIVE;
1585 else
1586 slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
1587 }
1588 }
1589 out:
1590 return count;
1591 }
1592 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1593 bonding_show_slaves_active, bonding_store_slaves_active);
1594
1595 static struct attribute *per_bond_attrs[] = {
1596 &dev_attr_slaves.attr,
1597 &dev_attr_mode.attr,
1598 &dev_attr_fail_over_mac.attr,
1599 &dev_attr_arp_validate.attr,
1600 &dev_attr_arp_interval.attr,
1601 &dev_attr_arp_ip_target.attr,
1602 &dev_attr_downdelay.attr,
1603 &dev_attr_updelay.attr,
1604 &dev_attr_lacp_rate.attr,
1605 &dev_attr_ad_select.attr,
1606 &dev_attr_xmit_hash_policy.attr,
1607 &dev_attr_num_grat_arp.attr,
1608 &dev_attr_num_unsol_na.attr,
1609 &dev_attr_miimon.attr,
1610 &dev_attr_primary.attr,
1611 &dev_attr_primary_reselect.attr,
1612 &dev_attr_use_carrier.attr,
1613 &dev_attr_active_slave.attr,
1614 &dev_attr_mii_status.attr,
1615 &dev_attr_ad_aggregator.attr,
1616 &dev_attr_ad_num_ports.attr,
1617 &dev_attr_ad_actor_key.attr,
1618 &dev_attr_ad_partner_key.attr,
1619 &dev_attr_ad_partner_mac.attr,
1620 &dev_attr_queue_id.attr,
1621 &dev_attr_all_slaves_active.attr,
1622 NULL,
1623 };
1624
1625 static struct attribute_group bonding_group = {
1626 .name = "bonding",
1627 .attrs = per_bond_attrs,
1628 };
1629
1630 /*
1631 * Initialize sysfs. This sets up the bonding_masters file in
1632 * /sys/class/net.
1633 */
1634 int bond_create_sysfs(void)
1635 {
1636 int ret;
1637
1638 ret = netdev_class_create_file(&class_attr_bonding_masters);
1639 /*
1640 * Permit multiple loads of the module by ignoring failures to
1641 * create the bonding_masters sysfs file. Bonding devices
1642 * created by second or subsequent loads of the module will
1643 * not be listed in, or controllable by, bonding_masters, but
1644 * will have the usual "bonding" sysfs directory.
1645 *
1646 * This is done to preserve backwards compatibility for
1647 * initscripts/sysconfig, which load bonding multiple times to
1648 * configure multiple bonding devices.
1649 */
1650 if (ret == -EEXIST) {
1651 /* Is someone being kinky and naming a device bonding_master? */
1652 if (__dev_get_by_name(&init_net,
1653 class_attr_bonding_masters.attr.name))
1654 pr_err("network device named %s already exists in sysfs",
1655 class_attr_bonding_masters.attr.name);
1656 ret = 0;
1657 }
1658
1659 return ret;
1660
1661 }
1662
1663 /*
1664 * Remove /sys/class/net/bonding_masters.
1665 */
1666 void bond_destroy_sysfs(void)
1667 {
1668 netdev_class_remove_file(&class_attr_bonding_masters);
1669 }
1670
1671 /*
1672 * Initialize sysfs for each bond. This sets up and registers
1673 * the 'bondctl' directory for each individual bond under /sys/class/net.
1674 */
1675 void bond_prepare_sysfs_group(struct bonding *bond)
1676 {
1677 bond->dev->sysfs_groups[0] = &bonding_group;
1678 }
1679
Linux kernel - Deliverables
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