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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / net / bonding / bond_sysfs.c
blobaef42f045320ae86eed4014835f90ccd786d1586
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/fs.h>
30 #include <linux/types.h>
31 #include <linux/string.h>
32 #include <linux/netdevice.h>
33 #include <linux/inetdevice.h>
34 #include <linux/in.h>
35 #include <linux/sysfs.h>
36 #include <linux/ctype.h>
37 #include <linux/inet.h>
38 #include <linux/rtnetlink.h>
39 #include <linux/etherdevice.h>
40 #include <net/net_namespace.h>
41 #include <net/netns/generic.h>
42 #include <linux/nsproxy.h>
43
44 #include "bonding.h"
45
46 #define to_dev(obj) container_of(obj, struct device, kobj)
47 #define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
48
49 /*
50 * "show" function for the bond_masters attribute.
51 * The class parameter is ignored.
52 */
53 static ssize_t bonding_show_bonds(struct class *cls,
54 struct class_attribute *attr,
55 char *buf)
56 {
57 struct bond_net *bn =
58 container_of(attr, struct bond_net, class_attr_bonding_masters);
59 int res = 0;
60 struct bonding *bond;
61
62 rtnl_lock();
63
64 list_for_each_entry(bond, &bn->dev_list, bond_list) {
65 if (res > (PAGE_SIZE - IFNAMSIZ)) {
66 /* not enough space for another interface name */
67 if ((PAGE_SIZE - res) > 10)
68 res = PAGE_SIZE - 10;
69 res += sprintf(buf + res, "++more++ ");
70 break;
71 }
72 res += sprintf(buf + res, "%s ", bond->dev->name);
73 }
74 if (res)
75 buf[res-1] = '\n'; /* eat the leftover space */
76
77 rtnl_unlock();
78 return res;
79 }
80
81 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
82 {
83 struct bonding *bond;
84
85 list_for_each_entry(bond, &bn->dev_list, bond_list) {
86 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
87 return bond->dev;
88 }
89 return NULL;
90 }
91
92 /*
93 * "store" function for the bond_masters attribute. This is what
94 * creates and deletes entire bonds.
95 *
96 * The class parameter is ignored.
97 *
98 */
99
100 static ssize_t bonding_store_bonds(struct class *cls,
101 struct class_attribute *attr,
102 const char *buffer, size_t count)
103 {
104 struct bond_net *bn =
105 container_of(attr, struct bond_net, class_attr_bonding_masters);
106 char command[IFNAMSIZ + 1] = {0, };
107 char *ifname;
108 int rv, res = count;
109
110 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
111 ifname = command + 1;
112 if ((strlen(command) <= 1) ||
113 !dev_valid_name(ifname))
114 goto err_no_cmd;
115
116 if (command[0] == '+') {
117 pr_info("%s is being created...\n", ifname);
118 rv = bond_create(bn->net, ifname);
119 if (rv) {
120 if (rv == -EEXIST)
121 pr_info("%s already exists.\n", ifname);
122 else
123 pr_info("%s creation failed.\n", ifname);
124 res = rv;
125 }
126 } else if (command[0] == '-') {
127 struct net_device *bond_dev;
128
129 rtnl_lock();
130 bond_dev = bond_get_by_name(bn, ifname);
131 if (bond_dev) {
132 pr_info("%s is being deleted...\n", ifname);
133 unregister_netdevice(bond_dev);
134 } else {
135 pr_err("unable to delete non-existent %s\n", ifname);
136 res = -ENODEV;
137 }
138 rtnl_unlock();
139 } else
140 goto err_no_cmd;
141
142 /* Always return either count or an error. If you return 0, you'll
143 * get called forever, which is bad.
144 */
145 return res;
146
147 err_no_cmd:
148 pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
149 return -EPERM;
150 }
151
152 static const void *bonding_namespace(struct class *cls,
153 const struct class_attribute *attr)
154 {
155 const struct bond_net *bn =
156 container_of(attr, struct bond_net, class_attr_bonding_masters);
157 return bn->net;
158 }
159
160 /* class attribute for bond_masters file. This ends up in /sys/class/net */
161 static const struct class_attribute class_attr_bonding_masters = {
162 .attr = {
163 .name = "bonding_masters",
164 .mode = S_IWUSR | S_IRUGO,
165 },
166 .show = bonding_show_bonds,
167 .store = bonding_store_bonds,
168 .namespace = bonding_namespace,
169 };
170
171 int bond_create_slave_symlinks(struct net_device *master,
172 struct net_device *slave)
173 {
174 char linkname[IFNAMSIZ+7];
175 int ret = 0;
176
177 /* first, create a link from the slave back to the master */
178 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
179 "master");
180 if (ret)
181 return ret;
182 /* next, create a link from the master to the slave */
183 sprintf(linkname, "slave_%s", slave->name);
184 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
185 linkname);
186 return ret;
187
188 }
189
190 void bond_destroy_slave_symlinks(struct net_device *master,
191 struct net_device *slave)
192 {
193 char linkname[IFNAMSIZ+7];
194
195 sysfs_remove_link(&(slave->dev.kobj), "master");
196 sprintf(linkname, "slave_%s", slave->name);
197 sysfs_remove_link(&(master->dev.kobj), linkname);
198 }
199
200
201 /*
202 * Show the slaves in the current bond.
203 */
204 static ssize_t bonding_show_slaves(struct device *d,
205 struct device_attribute *attr, char *buf)
206 {
207 struct slave *slave;
208 int i, res = 0;
209 struct bonding *bond = to_bond(d);
210
211 read_lock(&bond->lock);
212 bond_for_each_slave(bond, slave, i) {
213 if (res > (PAGE_SIZE - IFNAMSIZ)) {
214 /* not enough space for another interface name */
215 if ((PAGE_SIZE - res) > 10)
216 res = PAGE_SIZE - 10;
217 res += sprintf(buf + res, "++more++ ");
218 break;
219 }
220 res += sprintf(buf + res, "%s ", slave->dev->name);
221 }
222 read_unlock(&bond->lock);
223 if (res)
224 buf[res-1] = '\n'; /* eat the leftover space */
225 return res;
226 }
227
228 /*
229 * Set the slaves in the current bond. The bond interface must be
230 * up for this to succeed.
231 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
232 * All hard work should be done there.
233 */
234 static ssize_t bonding_store_slaves(struct device *d,
235 struct device_attribute *attr,
236 const char *buffer, size_t count)
237 {
238 char command[IFNAMSIZ + 1] = { 0, };
239 char *ifname;
240 int res, ret = count;
241 struct net_device *dev;
242 struct bonding *bond = to_bond(d);
243
244 if (!rtnl_trylock())
245 return restart_syscall();
246
247 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
248 ifname = command + 1;
249 if ((strlen(command) <= 1) ||
250 !dev_valid_name(ifname))
251 goto err_no_cmd;
252
253 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
254 if (!dev) {
255 pr_info("%s: Interface %s does not exist!\n",
256 bond->dev->name, ifname);
257 ret = -ENODEV;
258 goto out;
259 }
260
261 switch (command[0]) {
262 case '+':
263 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
264 res = bond_enslave(bond->dev, dev);
265 break;
266
267 case '-':
268 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
269 res = bond_release(bond->dev, dev);
270 break;
271
272 default:
273 goto err_no_cmd;
274 }
275
276 if (res)
277 ret = res;
278 goto out;
279
280 err_no_cmd:
281 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
282 bond->dev->name);
283 ret = -EPERM;
284
285 out:
286 rtnl_unlock();
287 return ret;
288 }
289
290 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
291 bonding_store_slaves);
292
293 /*
294 * Show and set the bonding mode. The bond interface must be down to
295 * change the mode.
296 */
297 static ssize_t bonding_show_mode(struct device *d,
298 struct device_attribute *attr, char *buf)
299 {
300 struct bonding *bond = to_bond(d);
301
302 return sprintf(buf, "%s %d\n",
303 bond_mode_tbl[bond->params.mode].modename,
304 bond->params.mode);
305 }
306
307 static ssize_t bonding_store_mode(struct device *d,
308 struct device_attribute *attr,
309 const char *buf, size_t count)
310 {
311 int new_value, ret = count;
312 struct bonding *bond = to_bond(d);
313
314 if (bond->dev->flags & IFF_UP) {
315 pr_err("unable to update mode of %s because interface is up.\n",
316 bond->dev->name);
317 ret = -EPERM;
318 goto out;
319 }
320
321 if (bond->slave_cnt > 0) {
322 pr_err("unable to update mode of %s because it has slaves.\n",
323 bond->dev->name);
324 ret = -EPERM;
325 goto out;
326 }
327
328 new_value = bond_parse_parm(buf, bond_mode_tbl);
329 if (new_value < 0) {
330 pr_err("%s: Ignoring invalid mode value %.*s.\n",
331 bond->dev->name, (int)strlen(buf) - 1, buf);
332 ret = -EINVAL;
333 goto out;
334 }
335 if ((new_value == BOND_MODE_ALB ||
336 new_value == BOND_MODE_TLB) &&
337 bond->params.arp_interval) {
338 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
339 bond->dev->name, bond_mode_tbl[new_value].modename);
340 ret = -EINVAL;
341 goto out;
342 }
343
344 bond->params.mode = new_value;
345 bond_set_mode_ops(bond, bond->params.mode);
346 pr_info("%s: setting mode to %s (%d).\n",
347 bond->dev->name, bond_mode_tbl[new_value].modename,
348 new_value);
349 out:
350 return ret;
351 }
352 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
353 bonding_show_mode, bonding_store_mode);
354
355 /*
356 * Show and set the bonding transmit hash method.
357 * The bond interface must be down to change the xmit hash policy.
358 */
359 static ssize_t bonding_show_xmit_hash(struct device *d,
360 struct device_attribute *attr,
361 char *buf)
362 {
363 struct bonding *bond = to_bond(d);
364
365 return sprintf(buf, "%s %d\n",
366 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
367 bond->params.xmit_policy);
368 }
369
370 static ssize_t bonding_store_xmit_hash(struct device *d,
371 struct device_attribute *attr,
372 const char *buf, size_t count)
373 {
374 int new_value, ret = count;
375 struct bonding *bond = to_bond(d);
376
377 if (bond->dev->flags & IFF_UP) {
378 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
379 bond->dev->name);
380 ret = -EPERM;
381 goto out;
382 }
383
384 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
385 if (new_value < 0) {
386 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
387 bond->dev->name,
388 (int)strlen(buf) - 1, buf);
389 ret = -EINVAL;
390 goto out;
391 } else {
392 bond->params.xmit_policy = new_value;
393 bond_set_mode_ops(bond, bond->params.mode);
394 pr_info("%s: setting xmit hash policy to %s (%d).\n",
395 bond->dev->name,
396 xmit_hashtype_tbl[new_value].modename, new_value);
397 }
398 out:
399 return ret;
400 }
401 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
402 bonding_show_xmit_hash, bonding_store_xmit_hash);
403
404 /*
405 * Show and set arp_validate.
406 */
407 static ssize_t bonding_show_arp_validate(struct device *d,
408 struct device_attribute *attr,
409 char *buf)
410 {
411 struct bonding *bond = to_bond(d);
412
413 return sprintf(buf, "%s %d\n",
414 arp_validate_tbl[bond->params.arp_validate].modename,
415 bond->params.arp_validate);
416 }
417
418 static ssize_t bonding_store_arp_validate(struct device *d,
419 struct device_attribute *attr,
420 const char *buf, size_t count)
421 {
422 int new_value;
423 struct bonding *bond = to_bond(d);
424
425 new_value = bond_parse_parm(buf, arp_validate_tbl);
426 if (new_value < 0) {
427 pr_err("%s: Ignoring invalid arp_validate value %s\n",
428 bond->dev->name, buf);
429 return -EINVAL;
430 }
431 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
432 pr_err("%s: arp_validate only supported in active-backup mode.\n",
433 bond->dev->name);
434 return -EINVAL;
435 }
436 pr_info("%s: setting arp_validate to %s (%d).\n",
437 bond->dev->name, arp_validate_tbl[new_value].modename,
438 new_value);
439
440 bond->params.arp_validate = new_value;
441
442 return count;
443 }
444
445 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
446 bonding_store_arp_validate);
447
448 /*
449 * Show and store fail_over_mac. User only allowed to change the
450 * value when there are no slaves.
451 */
452 static ssize_t bonding_show_fail_over_mac(struct device *d,
453 struct device_attribute *attr,
454 char *buf)
455 {
456 struct bonding *bond = to_bond(d);
457
458 return sprintf(buf, "%s %d\n",
459 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
460 bond->params.fail_over_mac);
461 }
462
463 static ssize_t bonding_store_fail_over_mac(struct device *d,
464 struct device_attribute *attr,
465 const char *buf, size_t count)
466 {
467 int new_value;
468 struct bonding *bond = to_bond(d);
469
470 if (bond->slave_cnt != 0) {
471 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
472 bond->dev->name);
473 return -EPERM;
474 }
475
476 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
477 if (new_value < 0) {
478 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
479 bond->dev->name, buf);
480 return -EINVAL;
481 }
482
483 bond->params.fail_over_mac = new_value;
484 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
485 bond->dev->name, fail_over_mac_tbl[new_value].modename,
486 new_value);
487
488 return count;
489 }
490
491 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
492 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
493
494 /*
495 * Show and set the arp timer interval. There are two tricky bits
496 * here. First, if ARP monitoring is activated, then we must disable
497 * MII monitoring. Second, if the ARP timer isn't running, we must
498 * start it.
499 */
500 static ssize_t bonding_show_arp_interval(struct device *d,
501 struct device_attribute *attr,
502 char *buf)
503 {
504 struct bonding *bond = to_bond(d);
505
506 return sprintf(buf, "%d\n", bond->params.arp_interval);
507 }
508
509 static ssize_t bonding_store_arp_interval(struct device *d,
510 struct device_attribute *attr,
511 const char *buf, size_t count)
512 {
513 int new_value, ret = count;
514 struct bonding *bond = to_bond(d);
515
516 if (sscanf(buf, "%d", &new_value) != 1) {
517 pr_err("%s: no arp_interval value specified.\n",
518 bond->dev->name);
519 ret = -EINVAL;
520 goto out;
521 }
522 if (new_value < 0) {
523 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
524 bond->dev->name, new_value, INT_MAX);
525 ret = -EINVAL;
526 goto out;
527 }
528 if (bond->params.mode == BOND_MODE_ALB ||
529 bond->params.mode == BOND_MODE_TLB) {
530 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
531 bond->dev->name, bond->dev->name);
532 ret = -EINVAL;
533 goto out;
534 }
535 pr_info("%s: Setting ARP monitoring interval to %d.\n",
536 bond->dev->name, new_value);
537 bond->params.arp_interval = new_value;
538 if (bond->params.miimon) {
539 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
540 bond->dev->name, bond->dev->name);
541 bond->params.miimon = 0;
542 if (delayed_work_pending(&bond->mii_work)) {
543 cancel_delayed_work(&bond->mii_work);
544 flush_workqueue(bond->wq);
545 }
546 }
547 if (!bond->params.arp_targets[0]) {
548 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
549 bond->dev->name);
550 }
551 if (bond->dev->flags & IFF_UP) {
552 /* If the interface is up, we may need to fire off
553 * the ARP timer. If the interface is down, the
554 * timer will get fired off when the open function
555 * is called.
556 */
557 if (!delayed_work_pending(&bond->arp_work)) {
558 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
559 INIT_DELAYED_WORK(&bond->arp_work,
560 bond_activebackup_arp_mon);
561 else
562 INIT_DELAYED_WORK(&bond->arp_work,
563 bond_loadbalance_arp_mon);
564
565 queue_delayed_work(bond->wq, &bond->arp_work, 0);
566 }
567 }
568
569 out:
570 return ret;
571 }
572 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
573 bonding_show_arp_interval, bonding_store_arp_interval);
574
575 /*
576 * Show and set the arp targets.
577 */
578 static ssize_t bonding_show_arp_targets(struct device *d,
579 struct device_attribute *attr,
580 char *buf)
581 {
582 int i, res = 0;
583 struct bonding *bond = to_bond(d);
584
585 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
586 if (bond->params.arp_targets[i])
587 res += sprintf(buf + res, "%pI4 ",
588 &bond->params.arp_targets[i]);
589 }
590 if (res)
591 buf[res-1] = '\n'; /* eat the leftover space */
592 return res;
593 }
594
595 static ssize_t bonding_store_arp_targets(struct device *d,
596 struct device_attribute *attr,
597 const char *buf, size_t count)
598 {
599 __be32 newtarget;
600 int i = 0, done = 0, ret = count;
601 struct bonding *bond = to_bond(d);
602 __be32 *targets;
603
604 targets = bond->params.arp_targets;
605 newtarget = in_aton(buf + 1);
606 /* look for adds */
607 if (buf[0] == '+') {
608 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
609 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
610 bond->dev->name, &newtarget);
611 ret = -EINVAL;
612 goto out;
613 }
614 /* look for an empty slot to put the target in, and check for dupes */
615 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
616 if (targets[i] == newtarget) { /* duplicate */
617 pr_err("%s: ARP target %pI4 is already present\n",
618 bond->dev->name, &newtarget);
619 ret = -EINVAL;
620 goto out;
621 }
622 if (targets[i] == 0) {
623 pr_info("%s: adding ARP target %pI4.\n",
624 bond->dev->name, &newtarget);
625 done = 1;
626 targets[i] = newtarget;
627 }
628 }
629 if (!done) {
630 pr_err("%s: ARP target table is full!\n",
631 bond->dev->name);
632 ret = -EINVAL;
633 goto out;
634 }
635
636 } else if (buf[0] == '-') {
637 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
638 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
639 bond->dev->name, &newtarget);
640 ret = -EINVAL;
641 goto out;
642 }
643
644 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
645 if (targets[i] == newtarget) {
646 int j;
647 pr_info("%s: removing ARP target %pI4.\n",
648 bond->dev->name, &newtarget);
649 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
650 targets[j] = targets[j+1];
651
652 targets[j] = 0;
653 done = 1;
654 }
655 }
656 if (!done) {
657 pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
658 bond->dev->name, &newtarget);
659 ret = -EINVAL;
660 goto out;
661 }
662 } else {
663 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
664 bond->dev->name);
665 ret = -EPERM;
666 goto out;
667 }
668
669 out:
670 return ret;
671 }
672 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
673
674 /*
675 * Show and set the up and down delays. These must be multiples of the
676 * MII monitoring value, and are stored internally as the multiplier.
677 * Thus, we must translate to MS for the real world.
678 */
679 static ssize_t bonding_show_downdelay(struct device *d,
680 struct device_attribute *attr,
681 char *buf)
682 {
683 struct bonding *bond = to_bond(d);
684
685 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
686 }
687
688 static ssize_t bonding_store_downdelay(struct device *d,
689 struct device_attribute *attr,
690 const char *buf, size_t count)
691 {
692 int new_value, ret = count;
693 struct bonding *bond = to_bond(d);
694
695 if (!(bond->params.miimon)) {
696 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
697 bond->dev->name);
698 ret = -EPERM;
699 goto out;
700 }
701
702 if (sscanf(buf, "%d", &new_value) != 1) {
703 pr_err("%s: no down delay value specified.\n", bond->dev->name);
704 ret = -EINVAL;
705 goto out;
706 }
707 if (new_value < 0) {
708 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
709 bond->dev->name, new_value, 1, INT_MAX);
710 ret = -EINVAL;
711 goto out;
712 } else {
713 if ((new_value % bond->params.miimon) != 0) {
714 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
715 bond->dev->name, new_value,
716 bond->params.miimon,
717 (new_value / bond->params.miimon) *
718 bond->params.miimon);
719 }
720 bond->params.downdelay = new_value / bond->params.miimon;
721 pr_info("%s: Setting down delay to %d.\n",
722 bond->dev->name,
723 bond->params.downdelay * bond->params.miimon);
724
725 }
726
727 out:
728 return ret;
729 }
730 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
731 bonding_show_downdelay, bonding_store_downdelay);
732
733 static ssize_t bonding_show_updelay(struct device *d,
734 struct device_attribute *attr,
735 char *buf)
736 {
737 struct bonding *bond = to_bond(d);
738
739 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
740
741 }
742
743 static ssize_t bonding_store_updelay(struct device *d,
744 struct device_attribute *attr,
745 const char *buf, size_t count)
746 {
747 int new_value, ret = count;
748 struct bonding *bond = to_bond(d);
749
750 if (!(bond->params.miimon)) {
751 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
752 bond->dev->name);
753 ret = -EPERM;
754 goto out;
755 }
756
757 if (sscanf(buf, "%d", &new_value) != 1) {
758 pr_err("%s: no up delay value specified.\n",
759 bond->dev->name);
760 ret = -EINVAL;
761 goto out;
762 }
763 if (new_value < 0) {
764 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
765 bond->dev->name, new_value, 1, INT_MAX);
766 ret = -EINVAL;
767 goto out;
768 } else {
769 if ((new_value % bond->params.miimon) != 0) {
770 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
771 bond->dev->name, new_value,
772 bond->params.miimon,
773 (new_value / bond->params.miimon) *
774 bond->params.miimon);
775 }
776 bond->params.updelay = new_value / bond->params.miimon;
777 pr_info("%s: Setting up delay to %d.\n",
778 bond->dev->name,
779 bond->params.updelay * bond->params.miimon);
780 }
781
782 out:
783 return ret;
784 }
785 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
786 bonding_show_updelay, bonding_store_updelay);
787
788 /*
789 * Show and set the LACP interval. Interface must be down, and the mode
790 * must be set to 802.3ad mode.
791 */
792 static ssize_t bonding_show_lacp(struct device *d,
793 struct device_attribute *attr,
794 char *buf)
795 {
796 struct bonding *bond = to_bond(d);
797
798 return sprintf(buf, "%s %d\n",
799 bond_lacp_tbl[bond->params.lacp_fast].modename,
800 bond->params.lacp_fast);
801 }
802
803 static ssize_t bonding_store_lacp(struct device *d,
804 struct device_attribute *attr,
805 const char *buf, size_t count)
806 {
807 int new_value, ret = count;
808 struct bonding *bond = to_bond(d);
809
810 if (bond->dev->flags & IFF_UP) {
811 pr_err("%s: Unable to update LACP rate because interface is up.\n",
812 bond->dev->name);
813 ret = -EPERM;
814 goto out;
815 }
816
817 if (bond->params.mode != BOND_MODE_8023AD) {
818 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
819 bond->dev->name);
820 ret = -EPERM;
821 goto out;
822 }
823
824 new_value = bond_parse_parm(buf, bond_lacp_tbl);
825
826 if ((new_value == 1) || (new_value == 0)) {
827 bond->params.lacp_fast = new_value;
828 bond_3ad_update_lacp_rate(bond);
829 pr_info("%s: Setting LACP rate to %s (%d).\n",
830 bond->dev->name, bond_lacp_tbl[new_value].modename,
831 new_value);
832 } else {
833 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
834 bond->dev->name, (int)strlen(buf) - 1, buf);
835 ret = -EINVAL;
836 }
837 out:
838 return ret;
839 }
840 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
841 bonding_show_lacp, bonding_store_lacp);
842
843 static ssize_t bonding_show_min_links(struct device *d,
844 struct device_attribute *attr,
845 char *buf)
846 {
847 struct bonding *bond = to_bond(d);
848
849 return sprintf(buf, "%d\n", bond->params.min_links);
850 }
851
852 static ssize_t bonding_store_min_links(struct device *d,
853 struct device_attribute *attr,
854 const char *buf, size_t count)
855 {
856 struct bonding *bond = to_bond(d);
857 int ret;
858 unsigned int new_value;
859
860 ret = kstrtouint(buf, 0, &new_value);
861 if (ret < 0) {
862 pr_err("%s: Ignoring invalid min links value %s.\n",
863 bond->dev->name, buf);
864 return ret;
865 }
866
867 pr_info("%s: Setting min links value to %u\n",
868 bond->dev->name, new_value);
869 bond->params.min_links = new_value;
870 return count;
871 }
872 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
873 bonding_show_min_links, bonding_store_min_links);
874
875 static ssize_t bonding_show_ad_select(struct device *d,
876 struct device_attribute *attr,
877 char *buf)
878 {
879 struct bonding *bond = to_bond(d);
880
881 return sprintf(buf, "%s %d\n",
882 ad_select_tbl[bond->params.ad_select].modename,
883 bond->params.ad_select);
884 }
885
886
887 static ssize_t bonding_store_ad_select(struct device *d,
888 struct device_attribute *attr,
889 const char *buf, size_t count)
890 {
891 int new_value, ret = count;
892 struct bonding *bond = to_bond(d);
893
894 if (bond->dev->flags & IFF_UP) {
895 pr_err("%s: Unable to update ad_select because interface is up.\n",
896 bond->dev->name);
897 ret = -EPERM;
898 goto out;
899 }
900
901 new_value = bond_parse_parm(buf, ad_select_tbl);
902
903 if (new_value != -1) {
904 bond->params.ad_select = new_value;
905 pr_info("%s: Setting ad_select to %s (%d).\n",
906 bond->dev->name, ad_select_tbl[new_value].modename,
907 new_value);
908 } else {
909 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
910 bond->dev->name, (int)strlen(buf) - 1, buf);
911 ret = -EINVAL;
912 }
913 out:
914 return ret;
915 }
916 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
917 bonding_show_ad_select, bonding_store_ad_select);
918
919 /*
920 * Show and set the number of peer notifications to send after a failover event.
921 */
922 static ssize_t bonding_show_num_peer_notif(struct device *d,
923 struct device_attribute *attr,
924 char *buf)
925 {
926 struct bonding *bond = to_bond(d);
927 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
928 }
929
930 static ssize_t bonding_store_num_peer_notif(struct device *d,
931 struct device_attribute *attr,
932 const char *buf, size_t count)
933 {
934 struct bonding *bond = to_bond(d);
935 int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
936 return err ? err : count;
937 }
938 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
939 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
940 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
941 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
942
943 /*
944 * Show and set the MII monitor interval. There are two tricky bits
945 * here. First, if MII monitoring is activated, then we must disable
946 * ARP monitoring. Second, if the timer isn't running, we must
947 * start it.
948 */
949 static ssize_t bonding_show_miimon(struct device *d,
950 struct device_attribute *attr,
951 char *buf)
952 {
953 struct bonding *bond = to_bond(d);
954
955 return sprintf(buf, "%d\n", bond->params.miimon);
956 }
957
958 static ssize_t bonding_store_miimon(struct device *d,
959 struct device_attribute *attr,
960 const char *buf, size_t count)
961 {
962 int new_value, ret = count;
963 struct bonding *bond = to_bond(d);
964
965 if (sscanf(buf, "%d", &new_value) != 1) {
966 pr_err("%s: no miimon value specified.\n",
967 bond->dev->name);
968 ret = -EINVAL;
969 goto out;
970 }
971 if (new_value < 0) {
972 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
973 bond->dev->name, new_value, 1, INT_MAX);
974 ret = -EINVAL;
975 goto out;
976 } else {
977 pr_info("%s: Setting MII monitoring interval to %d.\n",
978 bond->dev->name, new_value);
979 bond->params.miimon = new_value;
980 if (bond->params.updelay)
981 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
982 bond->dev->name,
983 bond->params.updelay * bond->params.miimon);
984 if (bond->params.downdelay)
985 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
986 bond->dev->name,
987 bond->params.downdelay * bond->params.miimon);
988 if (bond->params.arp_interval) {
989 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
990 bond->dev->name);
991 bond->params.arp_interval = 0;
992 if (bond->params.arp_validate) {
993 bond->params.arp_validate =
994 BOND_ARP_VALIDATE_NONE;
995 }
996 if (delayed_work_pending(&bond->arp_work)) {
997 cancel_delayed_work(&bond->arp_work);
998 flush_workqueue(bond->wq);
999 }
1000 }
1001
1002 if (bond->dev->flags & IFF_UP) {
1003 /* If the interface is up, we may need to fire off
1004 * the MII timer. If the interface is down, the
1005 * timer will get fired off when the open function
1006 * is called.
1007 */
1008 if (!delayed_work_pending(&bond->mii_work)) {
1009 INIT_DELAYED_WORK(&bond->mii_work,
1010 bond_mii_monitor);
1011 queue_delayed_work(bond->wq,
1012 &bond->mii_work, 0);
1013 }
1014 }
1015 }
1016 out:
1017 return ret;
1018 }
1019 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1020 bonding_show_miimon, bonding_store_miimon);
1021
1022 /*
1023 * Show and set the primary slave. The store function is much
1024 * simpler than bonding_store_slaves function because it only needs to
1025 * handle one interface name.
1026 * The bond must be a mode that supports a primary for this be
1027 * set.
1028 */
1029 static ssize_t bonding_show_primary(struct device *d,
1030 struct device_attribute *attr,
1031 char *buf)
1032 {
1033 int count = 0;
1034 struct bonding *bond = to_bond(d);
1035
1036 if (bond->primary_slave)
1037 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1038
1039 return count;
1040 }
1041
1042 static ssize_t bonding_store_primary(struct device *d,
1043 struct device_attribute *attr,
1044 const char *buf, size_t count)
1045 {
1046 int i;
1047 struct slave *slave;
1048 struct bonding *bond = to_bond(d);
1049 char ifname[IFNAMSIZ];
1050
1051 if (!rtnl_trylock())
1052 return restart_syscall();
1053 block_netpoll_tx();
1054 read_lock(&bond->lock);
1055 write_lock_bh(&bond->curr_slave_lock);
1056
1057 if (!USES_PRIMARY(bond->params.mode)) {
1058 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1059 bond->dev->name, bond->dev->name, bond->params.mode);
1060 goto out;
1061 }
1062
1063 sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1064
1065 /* check to see if we are clearing primary */
1066 if (!strlen(ifname) || buf[0] == '\n') {
1067 pr_info("%s: Setting primary slave to None.\n",
1068 bond->dev->name);
1069 bond->primary_slave = NULL;
1070 bond_select_active_slave(bond);
1071 goto out;
1072 }
1073
1074 bond_for_each_slave(bond, slave, i) {
1075 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1076 pr_info("%s: Setting %s as primary slave.\n",
1077 bond->dev->name, slave->dev->name);
1078 bond->primary_slave = slave;
1079 strcpy(bond->params.primary, slave->dev->name);
1080 bond_select_active_slave(bond);
1081 goto out;
1082 }
1083 }
1084
1085 pr_info("%s: Unable to set %.*s as primary slave.\n",
1086 bond->dev->name, (int)strlen(buf) - 1, buf);
1087 out:
1088 write_unlock_bh(&bond->curr_slave_lock);
1089 read_unlock(&bond->lock);
1090 unblock_netpoll_tx();
1091 rtnl_unlock();
1092
1093 return count;
1094 }
1095 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1096 bonding_show_primary, bonding_store_primary);
1097
1098 /*
1099 * Show and set the primary_reselect flag.
1100 */
1101 static ssize_t bonding_show_primary_reselect(struct device *d,
1102 struct device_attribute *attr,
1103 char *buf)
1104 {
1105 struct bonding *bond = to_bond(d);
1106
1107 return sprintf(buf, "%s %d\n",
1108 pri_reselect_tbl[bond->params.primary_reselect].modename,
1109 bond->params.primary_reselect);
1110 }
1111
1112 static ssize_t bonding_store_primary_reselect(struct device *d,
1113 struct device_attribute *attr,
1114 const char *buf, size_t count)
1115 {
1116 int new_value, ret = count;
1117 struct bonding *bond = to_bond(d);
1118
1119 if (!rtnl_trylock())
1120 return restart_syscall();
1121
1122 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1123 if (new_value < 0) {
1124 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1125 bond->dev->name,
1126 (int) strlen(buf) - 1, buf);
1127 ret = -EINVAL;
1128 goto out;
1129 }
1130
1131 bond->params.primary_reselect = new_value;
1132 pr_info("%s: setting primary_reselect to %s (%d).\n",
1133 bond->dev->name, pri_reselect_tbl[new_value].modename,
1134 new_value);
1135
1136 block_netpoll_tx();
1137 read_lock(&bond->lock);
1138 write_lock_bh(&bond->curr_slave_lock);
1139 bond_select_active_slave(bond);
1140 write_unlock_bh(&bond->curr_slave_lock);
1141 read_unlock(&bond->lock);
1142 unblock_netpoll_tx();
1143 out:
1144 rtnl_unlock();
1145 return ret;
1146 }
1147 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1148 bonding_show_primary_reselect,
1149 bonding_store_primary_reselect);
1150
1151 /*
1152 * Show and set the use_carrier flag.
1153 */
1154 static ssize_t bonding_show_carrier(struct device *d,
1155 struct device_attribute *attr,
1156 char *buf)
1157 {
1158 struct bonding *bond = to_bond(d);
1159
1160 return sprintf(buf, "%d\n", bond->params.use_carrier);
1161 }
1162
1163 static ssize_t bonding_store_carrier(struct device *d,
1164 struct device_attribute *attr,
1165 const char *buf, size_t count)
1166 {
1167 int new_value, ret = count;
1168 struct bonding *bond = to_bond(d);
1169
1170
1171 if (sscanf(buf, "%d", &new_value) != 1) {
1172 pr_err("%s: no use_carrier value specified.\n",
1173 bond->dev->name);
1174 ret = -EINVAL;
1175 goto out;
1176 }
1177 if ((new_value == 0) || (new_value == 1)) {
1178 bond->params.use_carrier = new_value;
1179 pr_info("%s: Setting use_carrier to %d.\n",
1180 bond->dev->name, new_value);
1181 } else {
1182 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1183 bond->dev->name, new_value);
1184 }
1185 out:
1186 return ret;
1187 }
1188 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1189 bonding_show_carrier, bonding_store_carrier);
1190
1191
1192 /*
1193 * Show and set currently active_slave.
1194 */
1195 static ssize_t bonding_show_active_slave(struct device *d,
1196 struct device_attribute *attr,
1197 char *buf)
1198 {
1199 struct slave *curr;
1200 struct bonding *bond = to_bond(d);
1201 int count = 0;
1202
1203 read_lock(&bond->curr_slave_lock);
1204 curr = bond->curr_active_slave;
1205 read_unlock(&bond->curr_slave_lock);
1206
1207 if (USES_PRIMARY(bond->params.mode) && curr)
1208 count = sprintf(buf, "%s\n", curr->dev->name);
1209 return count;
1210 }
1211
1212 static ssize_t bonding_store_active_slave(struct device *d,
1213 struct device_attribute *attr,
1214 const char *buf, size_t count)
1215 {
1216 int i;
1217 struct slave *slave;
1218 struct slave *old_active = NULL;
1219 struct slave *new_active = NULL;
1220 struct bonding *bond = to_bond(d);
1221 char ifname[IFNAMSIZ];
1222
1223 if (!rtnl_trylock())
1224 return restart_syscall();
1225
1226 block_netpoll_tx();
1227 read_lock(&bond->lock);
1228 write_lock_bh(&bond->curr_slave_lock);
1229
1230 if (!USES_PRIMARY(bond->params.mode)) {
1231 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1232 bond->dev->name, bond->dev->name, bond->params.mode);
1233 goto out;
1234 }
1235
1236 sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1237
1238 /* check to see if we are clearing active */
1239 if (!strlen(ifname) || buf[0] == '\n') {
1240 pr_info("%s: Clearing current active slave.\n",
1241 bond->dev->name);
1242 bond->curr_active_slave = NULL;
1243 bond_select_active_slave(bond);
1244 goto out;
1245 }
1246
1247 bond_for_each_slave(bond, slave, i) {
1248 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1249 old_active = bond->curr_active_slave;
1250 new_active = slave;
1251 if (new_active == old_active) {
1252 /* do nothing */
1253 pr_info("%s: %s is already the current"
1254 " active slave.\n",
1255 bond->dev->name,
1256 slave->dev->name);
1257 goto out;
1258 }
1259 else {
1260 if ((new_active) &&
1261 (old_active) &&
1262 (new_active->link == BOND_LINK_UP) &&
1263 IS_UP(new_active->dev)) {
1264 pr_info("%s: Setting %s as active"
1265 " slave.\n",
1266 bond->dev->name,
1267 slave->dev->name);
1268 bond_change_active_slave(bond,
1269 new_active);
1270 }
1271 else {
1272 pr_info("%s: Could not set %s as"
1273 " active slave; either %s is"
1274 " down or the link is down.\n",
1275 bond->dev->name,
1276 slave->dev->name,
1277 slave->dev->name);
1278 }
1279 goto out;
1280 }
1281 }
1282 }
1283
1284 pr_info("%s: Unable to set %.*s as active slave.\n",
1285 bond->dev->name, (int)strlen(buf) - 1, buf);
1286 out:
1287 write_unlock_bh(&bond->curr_slave_lock);
1288 read_unlock(&bond->lock);
1289 unblock_netpoll_tx();
1290
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 (!bond_is_active_slave(slave)) {
1583 if (new_value)
1584 slave->inactive = 0;
1585 else
1586 slave->inactive = 1;
1587 }
1588 }
1589 out:
1590 return ret;
1591 }
1592 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1593 bonding_show_slaves_active, bonding_store_slaves_active);
1594
1595 /*
1596 * Show and set the number of IGMP membership reports to send on link failure
1597 */
1598 static ssize_t bonding_show_resend_igmp(struct device *d,
1599 struct device_attribute *attr,
1600 char *buf)
1601 {
1602 struct bonding *bond = to_bond(d);
1603
1604 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1605 }
1606
1607 static ssize_t bonding_store_resend_igmp(struct device *d,
1608 struct device_attribute *attr,
1609 const char *buf, size_t count)
1610 {
1611 int new_value, ret = count;
1612 struct bonding *bond = to_bond(d);
1613
1614 if (sscanf(buf, "%d", &new_value) != 1) {
1615 pr_err("%s: no resend_igmp value specified.\n",
1616 bond->dev->name);
1617 ret = -EINVAL;
1618 goto out;
1619 }
1620
1621 if (new_value < 0 || new_value > 255) {
1622 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1623 bond->dev->name, new_value);
1624 ret = -EINVAL;
1625 goto out;
1626 }
1627
1628 pr_info("%s: Setting resend_igmp to %d.\n",
1629 bond->dev->name, new_value);
1630 bond->params.resend_igmp = new_value;
1631 out:
1632 return ret;
1633 }
1634
1635 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1636 bonding_show_resend_igmp, bonding_store_resend_igmp);
1637
1638 static struct attribute *per_bond_attrs[] = {
1639 &dev_attr_slaves.attr,
1640 &dev_attr_mode.attr,
1641 &dev_attr_fail_over_mac.attr,
1642 &dev_attr_arp_validate.attr,
1643 &dev_attr_arp_interval.attr,
1644 &dev_attr_arp_ip_target.attr,
1645 &dev_attr_downdelay.attr,
1646 &dev_attr_updelay.attr,
1647 &dev_attr_lacp_rate.attr,
1648 &dev_attr_ad_select.attr,
1649 &dev_attr_xmit_hash_policy.attr,
1650 &dev_attr_num_grat_arp.attr,
1651 &dev_attr_num_unsol_na.attr,
1652 &dev_attr_miimon.attr,
1653 &dev_attr_primary.attr,
1654 &dev_attr_primary_reselect.attr,
1655 &dev_attr_use_carrier.attr,
1656 &dev_attr_active_slave.attr,
1657 &dev_attr_mii_status.attr,
1658 &dev_attr_ad_aggregator.attr,
1659 &dev_attr_ad_num_ports.attr,
1660 &dev_attr_ad_actor_key.attr,
1661 &dev_attr_ad_partner_key.attr,
1662 &dev_attr_ad_partner_mac.attr,
1663 &dev_attr_queue_id.attr,
1664 &dev_attr_all_slaves_active.attr,
1665 &dev_attr_resend_igmp.attr,
1666 &dev_attr_min_links.attr,
1667 NULL,
1668 };
1669
1670 static struct attribute_group bonding_group = {
1671 .name = "bonding",
1672 .attrs = per_bond_attrs,
1673 };
1674
1675 /*
1676 * Initialize sysfs. This sets up the bonding_masters file in
1677 * /sys/class/net.
1678 */
1679 int bond_create_sysfs(struct bond_net *bn)
1680 {
1681 int ret;
1682
1683 bn->class_attr_bonding_masters = class_attr_bonding_masters;
1684 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1685
1686 ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1687 /*
1688 * Permit multiple loads of the module by ignoring failures to
1689 * create the bonding_masters sysfs file. Bonding devices
1690 * created by second or subsequent loads of the module will
1691 * not be listed in, or controllable by, bonding_masters, but
1692 * will have the usual "bonding" sysfs directory.
1693 *
1694 * This is done to preserve backwards compatibility for
1695 * initscripts/sysconfig, which load bonding multiple times to
1696 * configure multiple bonding devices.
1697 */
1698 if (ret == -EEXIST) {
1699 /* Is someone being kinky and naming a device bonding_master? */
1700 if (__dev_get_by_name(bn->net,
1701 class_attr_bonding_masters.attr.name))
1702 pr_err("network device named %s already exists in sysfs",
1703 class_attr_bonding_masters.attr.name);
1704 ret = 0;
1705 }
1706
1707 return ret;
1708
1709 }
1710
1711 /*
1712 * Remove /sys/class/net/bonding_masters.
1713 */
1714 void bond_destroy_sysfs(struct bond_net *bn)
1715 {
1716 netdev_class_remove_file(&bn->class_attr_bonding_masters);
1717 }
1718
1719 /*
1720 * Initialize sysfs for each bond. This sets up and registers
1721 * the 'bondctl' directory for each individual bond under /sys/class/net.
1722 */
1723 void bond_prepare_sysfs_group(struct bonding *bond)
1724 {
1725 bond->dev->sysfs_groups[0] = &bonding_group;
1726 }
1727