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bootmem: Use for_each_mem_pfn_range() in page_alloc.c
[linux-2.6.git] / drivers / net / bonding / bond_sysfs.c
blob88fcb25e554a1f92205246771040149e3fce6967
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 if (rv == -EEXIST)
122 pr_info("%s already exists.\n", ifname);
123 else
124 pr_info("%s creation failed.\n", ifname);
125 res = rv;
126 }
127 } else if (command[0] == '-') {
128 struct net_device *bond_dev;
129
130 rtnl_lock();
131 bond_dev = bond_get_by_name(net, ifname);
132 if (bond_dev) {
133 pr_info("%s is being deleted...\n", ifname);
134 unregister_netdevice(bond_dev);
135 } else {
136 pr_err("unable to delete non-existent %s\n", ifname);
137 res = -ENODEV;
138 }
139 rtnl_unlock();
140 } else
141 goto err_no_cmd;
142
143 /* Always return either count or an error. If you return 0, you'll
144 * get called forever, which is bad.
145 */
146 return res;
147
148 err_no_cmd:
149 pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
150 return -EPERM;
151 }
152
153 /* class attribute for bond_masters file. This ends up in /sys/class/net */
154 static CLASS_ATTR(bonding_masters, S_IWUSR | S_IRUGO,
155 bonding_show_bonds, bonding_store_bonds);
156
157 int bond_create_slave_symlinks(struct net_device *master,
158 struct net_device *slave)
159 {
160 char linkname[IFNAMSIZ+7];
161 int ret = 0;
162
163 /* first, create a link from the slave back to the master */
164 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
165 "master");
166 if (ret)
167 return ret;
168 /* next, create a link from the master to the slave */
169 sprintf(linkname, "slave_%s", slave->name);
170 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
171 linkname);
172 return ret;
173
174 }
175
176 void bond_destroy_slave_symlinks(struct net_device *master,
177 struct net_device *slave)
178 {
179 char linkname[IFNAMSIZ+7];
180
181 sysfs_remove_link(&(slave->dev.kobj), "master");
182 sprintf(linkname, "slave_%s", slave->name);
183 sysfs_remove_link(&(master->dev.kobj), linkname);
184 }
185
186
187 /*
188 * Show the slaves in the current bond.
189 */
190 static ssize_t bonding_show_slaves(struct device *d,
191 struct device_attribute *attr, char *buf)
192 {
193 struct slave *slave;
194 int i, res = 0;
195 struct bonding *bond = to_bond(d);
196
197 read_lock(&bond->lock);
198 bond_for_each_slave(bond, slave, i) {
199 if (res > (PAGE_SIZE - IFNAMSIZ)) {
200 /* not enough space for another interface name */
201 if ((PAGE_SIZE - res) > 10)
202 res = PAGE_SIZE - 10;
203 res += sprintf(buf + res, "++more++ ");
204 break;
205 }
206 res += sprintf(buf + res, "%s ", slave->dev->name);
207 }
208 read_unlock(&bond->lock);
209 if (res)
210 buf[res-1] = '\n'; /* eat the leftover space */
211 return res;
212 }
213
214 /*
215 * Set the slaves in the current bond. The bond interface must be
216 * up for this to succeed.
217 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
218 * All hard work should be done there.
219 */
220 static ssize_t bonding_store_slaves(struct device *d,
221 struct device_attribute *attr,
222 const char *buffer, size_t count)
223 {
224 char command[IFNAMSIZ + 1] = { 0, };
225 char *ifname;
226 int res, ret = count;
227 struct net_device *dev;
228 struct bonding *bond = to_bond(d);
229
230 if (!rtnl_trylock())
231 return restart_syscall();
232
233 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
234 ifname = command + 1;
235 if ((strlen(command) <= 1) ||
236 !dev_valid_name(ifname))
237 goto err_no_cmd;
238
239 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
240 if (!dev) {
241 pr_info("%s: Interface %s does not exist!\n",
242 bond->dev->name, ifname);
243 ret = -ENODEV;
244 goto out;
245 }
246
247 switch (command[0]) {
248 case '+':
249 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
250 res = bond_enslave(bond->dev, dev);
251 break;
252
253 case '-':
254 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
255 res = bond_release(bond->dev, dev);
256 break;
257
258 default:
259 goto err_no_cmd;
260 }
261
262 if (res)
263 ret = res;
264 goto out;
265
266 err_no_cmd:
267 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
268 bond->dev->name);
269 ret = -EPERM;
270
271 out:
272 rtnl_unlock();
273 return ret;
274 }
275
276 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
277 bonding_store_slaves);
278
279 /*
280 * Show and set the bonding mode. The bond interface must be down to
281 * change the mode.
282 */
283 static ssize_t bonding_show_mode(struct device *d,
284 struct device_attribute *attr, char *buf)
285 {
286 struct bonding *bond = to_bond(d);
287
288 return sprintf(buf, "%s %d\n",
289 bond_mode_tbl[bond->params.mode].modename,
290 bond->params.mode);
291 }
292
293 static ssize_t bonding_store_mode(struct device *d,
294 struct device_attribute *attr,
295 const char *buf, size_t count)
296 {
297 int new_value, ret = count;
298 struct bonding *bond = to_bond(d);
299
300 if (bond->dev->flags & IFF_UP) {
301 pr_err("unable to update mode of %s because interface is up.\n",
302 bond->dev->name);
303 ret = -EPERM;
304 goto out;
305 }
306
307 new_value = bond_parse_parm(buf, bond_mode_tbl);
308 if (new_value < 0) {
309 pr_err("%s: Ignoring invalid mode value %.*s.\n",
310 bond->dev->name, (int)strlen(buf) - 1, buf);
311 ret = -EINVAL;
312 goto out;
313 }
314 if ((new_value == BOND_MODE_ALB ||
315 new_value == BOND_MODE_TLB) &&
316 bond->params.arp_interval) {
317 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
318 bond->dev->name, bond_mode_tbl[new_value].modename);
319 ret = -EINVAL;
320 goto out;
321 }
322
323 bond->params.mode = new_value;
324 bond_set_mode_ops(bond, bond->params.mode);
325 pr_info("%s: setting mode to %s (%d).\n",
326 bond->dev->name, bond_mode_tbl[new_value].modename,
327 new_value);
328 out:
329 return ret;
330 }
331 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
332 bonding_show_mode, bonding_store_mode);
333
334 /*
335 * Show and set the bonding transmit hash method.
336 * The bond interface must be down to change the xmit hash policy.
337 */
338 static ssize_t bonding_show_xmit_hash(struct device *d,
339 struct device_attribute *attr,
340 char *buf)
341 {
342 struct bonding *bond = to_bond(d);
343
344 return sprintf(buf, "%s %d\n",
345 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
346 bond->params.xmit_policy);
347 }
348
349 static ssize_t bonding_store_xmit_hash(struct device *d,
350 struct device_attribute *attr,
351 const char *buf, size_t count)
352 {
353 int new_value, ret = count;
354 struct bonding *bond = to_bond(d);
355
356 if (bond->dev->flags & IFF_UP) {
357 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
358 bond->dev->name);
359 ret = -EPERM;
360 goto out;
361 }
362
363 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
364 if (new_value < 0) {
365 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
366 bond->dev->name,
367 (int)strlen(buf) - 1, buf);
368 ret = -EINVAL;
369 goto out;
370 } else {
371 bond->params.xmit_policy = new_value;
372 bond_set_mode_ops(bond, bond->params.mode);
373 pr_info("%s: setting xmit hash policy to %s (%d).\n",
374 bond->dev->name,
375 xmit_hashtype_tbl[new_value].modename, new_value);
376 }
377 out:
378 return ret;
379 }
380 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
381 bonding_show_xmit_hash, bonding_store_xmit_hash);
382
383 /*
384 * Show and set arp_validate.
385 */
386 static ssize_t bonding_show_arp_validate(struct device *d,
387 struct device_attribute *attr,
388 char *buf)
389 {
390 struct bonding *bond = to_bond(d);
391
392 return sprintf(buf, "%s %d\n",
393 arp_validate_tbl[bond->params.arp_validate].modename,
394 bond->params.arp_validate);
395 }
396
397 static ssize_t bonding_store_arp_validate(struct device *d,
398 struct device_attribute *attr,
399 const char *buf, size_t count)
400 {
401 int new_value;
402 struct bonding *bond = to_bond(d);
403
404 new_value = bond_parse_parm(buf, arp_validate_tbl);
405 if (new_value < 0) {
406 pr_err("%s: Ignoring invalid arp_validate value %s\n",
407 bond->dev->name, buf);
408 return -EINVAL;
409 }
410 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
411 pr_err("%s: arp_validate only supported in active-backup mode.\n",
412 bond->dev->name);
413 return -EINVAL;
414 }
415 pr_info("%s: setting arp_validate to %s (%d).\n",
416 bond->dev->name, arp_validate_tbl[new_value].modename,
417 new_value);
418
419 bond->params.arp_validate = new_value;
420
421 return count;
422 }
423
424 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
425 bonding_store_arp_validate);
426
427 /*
428 * Show and store fail_over_mac. User only allowed to change the
429 * value when there are no slaves.
430 */
431 static ssize_t bonding_show_fail_over_mac(struct device *d,
432 struct device_attribute *attr,
433 char *buf)
434 {
435 struct bonding *bond = to_bond(d);
436
437 return sprintf(buf, "%s %d\n",
438 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
439 bond->params.fail_over_mac);
440 }
441
442 static ssize_t bonding_store_fail_over_mac(struct device *d,
443 struct device_attribute *attr,
444 const char *buf, size_t count)
445 {
446 int new_value;
447 struct bonding *bond = to_bond(d);
448
449 if (bond->slave_cnt != 0) {
450 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
451 bond->dev->name);
452 return -EPERM;
453 }
454
455 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
456 if (new_value < 0) {
457 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
458 bond->dev->name, buf);
459 return -EINVAL;
460 }
461
462 bond->params.fail_over_mac = new_value;
463 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
464 bond->dev->name, fail_over_mac_tbl[new_value].modename,
465 new_value);
466
467 return count;
468 }
469
470 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
471 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
472
473 /*
474 * Show and set the arp timer interval. There are two tricky bits
475 * here. First, if ARP monitoring is activated, then we must disable
476 * MII monitoring. Second, if the ARP timer isn't running, we must
477 * start it.
478 */
479 static ssize_t bonding_show_arp_interval(struct device *d,
480 struct device_attribute *attr,
481 char *buf)
482 {
483 struct bonding *bond = to_bond(d);
484
485 return sprintf(buf, "%d\n", bond->params.arp_interval);
486 }
487
488 static ssize_t bonding_store_arp_interval(struct device *d,
489 struct device_attribute *attr,
490 const char *buf, size_t count)
491 {
492 int new_value, ret = count;
493 struct bonding *bond = to_bond(d);
494
495 if (sscanf(buf, "%d", &new_value) != 1) {
496 pr_err("%s: no arp_interval value specified.\n",
497 bond->dev->name);
498 ret = -EINVAL;
499 goto out;
500 }
501 if (new_value < 0) {
502 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
503 bond->dev->name, new_value, INT_MAX);
504 ret = -EINVAL;
505 goto out;
506 }
507 if (bond->params.mode == BOND_MODE_ALB ||
508 bond->params.mode == BOND_MODE_TLB) {
509 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
510 bond->dev->name, bond->dev->name);
511 ret = -EINVAL;
512 goto out;
513 }
514 pr_info("%s: Setting ARP monitoring interval to %d.\n",
515 bond->dev->name, new_value);
516 bond->params.arp_interval = new_value;
517 if (bond->params.miimon) {
518 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
519 bond->dev->name, bond->dev->name);
520 bond->params.miimon = 0;
521 if (delayed_work_pending(&bond->mii_work)) {
522 cancel_delayed_work(&bond->mii_work);
523 flush_workqueue(bond->wq);
524 }
525 }
526 if (!bond->params.arp_targets[0]) {
527 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
528 bond->dev->name);
529 }
530 if (bond->dev->flags & IFF_UP) {
531 /* If the interface is up, we may need to fire off
532 * the ARP timer. If the interface is down, the
533 * timer will get fired off when the open function
534 * is called.
535 */
536 if (!delayed_work_pending(&bond->arp_work)) {
537 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
538 INIT_DELAYED_WORK(&bond->arp_work,
539 bond_activebackup_arp_mon);
540 else
541 INIT_DELAYED_WORK(&bond->arp_work,
542 bond_loadbalance_arp_mon);
543
544 queue_delayed_work(bond->wq, &bond->arp_work, 0);
545 }
546 }
547
548 out:
549 return ret;
550 }
551 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
552 bonding_show_arp_interval, bonding_store_arp_interval);
553
554 /*
555 * Show and set the arp targets.
556 */
557 static ssize_t bonding_show_arp_targets(struct device *d,
558 struct device_attribute *attr,
559 char *buf)
560 {
561 int i, res = 0;
562 struct bonding *bond = to_bond(d);
563
564 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
565 if (bond->params.arp_targets[i])
566 res += sprintf(buf + res, "%pI4 ",
567 &bond->params.arp_targets[i]);
568 }
569 if (res)
570 buf[res-1] = '\n'; /* eat the leftover space */
571 return res;
572 }
573
574 static ssize_t bonding_store_arp_targets(struct device *d,
575 struct device_attribute *attr,
576 const char *buf, size_t count)
577 {
578 __be32 newtarget;
579 int i = 0, done = 0, ret = count;
580 struct bonding *bond = to_bond(d);
581 __be32 *targets;
582
583 targets = bond->params.arp_targets;
584 newtarget = in_aton(buf + 1);
585 /* look for adds */
586 if (buf[0] == '+') {
587 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
588 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
589 bond->dev->name, &newtarget);
590 ret = -EINVAL;
591 goto out;
592 }
593 /* look for an empty slot to put the target in, and check for dupes */
594 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
595 if (targets[i] == newtarget) { /* duplicate */
596 pr_err("%s: ARP target %pI4 is already present\n",
597 bond->dev->name, &newtarget);
598 ret = -EINVAL;
599 goto out;
600 }
601 if (targets[i] == 0) {
602 pr_info("%s: adding ARP target %pI4.\n",
603 bond->dev->name, &newtarget);
604 done = 1;
605 targets[i] = newtarget;
606 }
607 }
608 if (!done) {
609 pr_err("%s: ARP target table is full!\n",
610 bond->dev->name);
611 ret = -EINVAL;
612 goto out;
613 }
614
615 } else if (buf[0] == '-') {
616 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
617 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
618 bond->dev->name, &newtarget);
619 ret = -EINVAL;
620 goto out;
621 }
622
623 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
624 if (targets[i] == newtarget) {
625 int j;
626 pr_info("%s: removing ARP target %pI4.\n",
627 bond->dev->name, &newtarget);
628 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
629 targets[j] = targets[j+1];
630
631 targets[j] = 0;
632 done = 1;
633 }
634 }
635 if (!done) {
636 pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
637 bond->dev->name, &newtarget);
638 ret = -EINVAL;
639 goto out;
640 }
641 } else {
642 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
643 bond->dev->name);
644 ret = -EPERM;
645 goto out;
646 }
647
648 out:
649 return ret;
650 }
651 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
652
653 /*
654 * Show and set the up and down delays. These must be multiples of the
655 * MII monitoring value, and are stored internally as the multiplier.
656 * Thus, we must translate to MS for the real world.
657 */
658 static ssize_t bonding_show_downdelay(struct device *d,
659 struct device_attribute *attr,
660 char *buf)
661 {
662 struct bonding *bond = to_bond(d);
663
664 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
665 }
666
667 static ssize_t bonding_store_downdelay(struct device *d,
668 struct device_attribute *attr,
669 const char *buf, size_t count)
670 {
671 int new_value, ret = count;
672 struct bonding *bond = to_bond(d);
673
674 if (!(bond->params.miimon)) {
675 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
676 bond->dev->name);
677 ret = -EPERM;
678 goto out;
679 }
680
681 if (sscanf(buf, "%d", &new_value) != 1) {
682 pr_err("%s: no down delay value specified.\n", bond->dev->name);
683 ret = -EINVAL;
684 goto out;
685 }
686 if (new_value < 0) {
687 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
688 bond->dev->name, new_value, 1, INT_MAX);
689 ret = -EINVAL;
690 goto out;
691 } else {
692 if ((new_value % bond->params.miimon) != 0) {
693 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
694 bond->dev->name, new_value,
695 bond->params.miimon,
696 (new_value / bond->params.miimon) *
697 bond->params.miimon);
698 }
699 bond->params.downdelay = new_value / bond->params.miimon;
700 pr_info("%s: Setting down delay to %d.\n",
701 bond->dev->name,
702 bond->params.downdelay * bond->params.miimon);
703
704 }
705
706 out:
707 return ret;
708 }
709 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
710 bonding_show_downdelay, bonding_store_downdelay);
711
712 static ssize_t bonding_show_updelay(struct device *d,
713 struct device_attribute *attr,
714 char *buf)
715 {
716 struct bonding *bond = to_bond(d);
717
718 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
719
720 }
721
722 static ssize_t bonding_store_updelay(struct device *d,
723 struct device_attribute *attr,
724 const char *buf, size_t count)
725 {
726 int new_value, ret = count;
727 struct bonding *bond = to_bond(d);
728
729 if (!(bond->params.miimon)) {
730 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
731 bond->dev->name);
732 ret = -EPERM;
733 goto out;
734 }
735
736 if (sscanf(buf, "%d", &new_value) != 1) {
737 pr_err("%s: no up delay value specified.\n",
738 bond->dev->name);
739 ret = -EINVAL;
740 goto out;
741 }
742 if (new_value < 0) {
743 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
744 bond->dev->name, new_value, 1, INT_MAX);
745 ret = -EINVAL;
746 goto out;
747 } else {
748 if ((new_value % bond->params.miimon) != 0) {
749 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
750 bond->dev->name, new_value,
751 bond->params.miimon,
752 (new_value / bond->params.miimon) *
753 bond->params.miimon);
754 }
755 bond->params.updelay = new_value / bond->params.miimon;
756 pr_info("%s: Setting up delay to %d.\n",
757 bond->dev->name,
758 bond->params.updelay * bond->params.miimon);
759 }
760
761 out:
762 return ret;
763 }
764 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
765 bonding_show_updelay, bonding_store_updelay);
766
767 /*
768 * Show and set the LACP interval. Interface must be down, and the mode
769 * must be set to 802.3ad mode.
770 */
771 static ssize_t bonding_show_lacp(struct device *d,
772 struct device_attribute *attr,
773 char *buf)
774 {
775 struct bonding *bond = to_bond(d);
776
777 return sprintf(buf, "%s %d\n",
778 bond_lacp_tbl[bond->params.lacp_fast].modename,
779 bond->params.lacp_fast);
780 }
781
782 static ssize_t bonding_store_lacp(struct device *d,
783 struct device_attribute *attr,
784 const char *buf, size_t count)
785 {
786 int new_value, ret = count;
787 struct bonding *bond = to_bond(d);
788
789 if (bond->dev->flags & IFF_UP) {
790 pr_err("%s: Unable to update LACP rate because interface is up.\n",
791 bond->dev->name);
792 ret = -EPERM;
793 goto out;
794 }
795
796 if (bond->params.mode != BOND_MODE_8023AD) {
797 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
798 bond->dev->name);
799 ret = -EPERM;
800 goto out;
801 }
802
803 new_value = bond_parse_parm(buf, bond_lacp_tbl);
804
805 if ((new_value == 1) || (new_value == 0)) {
806 bond->params.lacp_fast = new_value;
807 pr_info("%s: Setting LACP rate to %s (%d).\n",
808 bond->dev->name, bond_lacp_tbl[new_value].modename,
809 new_value);
810 } else {
811 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
812 bond->dev->name, (int)strlen(buf) - 1, buf);
813 ret = -EINVAL;
814 }
815 out:
816 return ret;
817 }
818 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
819 bonding_show_lacp, bonding_store_lacp);
820
821 static ssize_t bonding_show_ad_select(struct device *d,
822 struct device_attribute *attr,
823 char *buf)
824 {
825 struct bonding *bond = to_bond(d);
826
827 return sprintf(buf, "%s %d\n",
828 ad_select_tbl[bond->params.ad_select].modename,
829 bond->params.ad_select);
830 }
831
832
833 static ssize_t bonding_store_ad_select(struct device *d,
834 struct device_attribute *attr,
835 const char *buf, size_t count)
836 {
837 int new_value, ret = count;
838 struct bonding *bond = to_bond(d);
839
840 if (bond->dev->flags & IFF_UP) {
841 pr_err("%s: Unable to update ad_select because interface is up.\n",
842 bond->dev->name);
843 ret = -EPERM;
844 goto out;
845 }
846
847 new_value = bond_parse_parm(buf, ad_select_tbl);
848
849 if (new_value != -1) {
850 bond->params.ad_select = new_value;
851 pr_info("%s: Setting ad_select to %s (%d).\n",
852 bond->dev->name, ad_select_tbl[new_value].modename,
853 new_value);
854 } else {
855 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
856 bond->dev->name, (int)strlen(buf) - 1, buf);
857 ret = -EINVAL;
858 }
859 out:
860 return ret;
861 }
862 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
863 bonding_show_ad_select, bonding_store_ad_select);
864
865 /*
866 * Show and set the number of peer notifications to send after a failover event.
867 */
868 static ssize_t bonding_show_num_peer_notif(struct device *d,
869 struct device_attribute *attr,
870 char *buf)
871 {
872 struct bonding *bond = to_bond(d);
873 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
874 }
875
876 static ssize_t bonding_store_num_peer_notif(struct device *d,
877 struct device_attribute *attr,
878 const char *buf, size_t count)
879 {
880 struct bonding *bond = to_bond(d);
881 int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
882 return err ? err : count;
883 }
884 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
885 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
886 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
887 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
888
889 /*
890 * Show and set the MII monitor interval. There are two tricky bits
891 * here. First, if MII monitoring is activated, then we must disable
892 * ARP monitoring. Second, if the timer isn't running, we must
893 * start it.
894 */
895 static ssize_t bonding_show_miimon(struct device *d,
896 struct device_attribute *attr,
897 char *buf)
898 {
899 struct bonding *bond = to_bond(d);
900
901 return sprintf(buf, "%d\n", bond->params.miimon);
902 }
903
904 static ssize_t bonding_store_miimon(struct device *d,
905 struct device_attribute *attr,
906 const char *buf, size_t count)
907 {
908 int new_value, ret = count;
909 struct bonding *bond = to_bond(d);
910
911 if (sscanf(buf, "%d", &new_value) != 1) {
912 pr_err("%s: no miimon value specified.\n",
913 bond->dev->name);
914 ret = -EINVAL;
915 goto out;
916 }
917 if (new_value < 0) {
918 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
919 bond->dev->name, new_value, 1, INT_MAX);
920 ret = -EINVAL;
921 goto out;
922 } else {
923 pr_info("%s: Setting MII monitoring interval to %d.\n",
924 bond->dev->name, new_value);
925 bond->params.miimon = new_value;
926 if (bond->params.updelay)
927 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
928 bond->dev->name,
929 bond->params.updelay * bond->params.miimon);
930 if (bond->params.downdelay)
931 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
932 bond->dev->name,
933 bond->params.downdelay * bond->params.miimon);
934 if (bond->params.arp_interval) {
935 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
936 bond->dev->name);
937 bond->params.arp_interval = 0;
938 if (bond->params.arp_validate) {
939 bond->params.arp_validate =
940 BOND_ARP_VALIDATE_NONE;
941 }
942 if (delayed_work_pending(&bond->arp_work)) {
943 cancel_delayed_work(&bond->arp_work);
944 flush_workqueue(bond->wq);
945 }
946 }
947
948 if (bond->dev->flags & IFF_UP) {
949 /* If the interface is up, we may need to fire off
950 * the MII timer. If the interface is down, the
951 * timer will get fired off when the open function
952 * is called.
953 */
954 if (!delayed_work_pending(&bond->mii_work)) {
955 INIT_DELAYED_WORK(&bond->mii_work,
956 bond_mii_monitor);
957 queue_delayed_work(bond->wq,
958 &bond->mii_work, 0);
959 }
960 }
961 }
962 out:
963 return ret;
964 }
965 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
966 bonding_show_miimon, bonding_store_miimon);
967
968 /*
969 * Show and set the primary slave. The store function is much
970 * simpler than bonding_store_slaves function because it only needs to
971 * handle one interface name.
972 * The bond must be a mode that supports a primary for this be
973 * set.
974 */
975 static ssize_t bonding_show_primary(struct device *d,
976 struct device_attribute *attr,
977 char *buf)
978 {
979 int count = 0;
980 struct bonding *bond = to_bond(d);
981
982 if (bond->primary_slave)
983 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
984
985 return count;
986 }
987
988 static ssize_t bonding_store_primary(struct device *d,
989 struct device_attribute *attr,
990 const char *buf, size_t count)
991 {
992 int i;
993 struct slave *slave;
994 struct bonding *bond = to_bond(d);
995
996 if (!rtnl_trylock())
997 return restart_syscall();
998 block_netpoll_tx();
999 read_lock(&bond->lock);
1000 write_lock_bh(&bond->curr_slave_lock);
1001
1002 if (!USES_PRIMARY(bond->params.mode)) {
1003 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1004 bond->dev->name, bond->dev->name, bond->params.mode);
1005 } else {
1006 bond_for_each_slave(bond, slave, i) {
1007 if (strnicmp
1008 (slave->dev->name, buf,
1009 strlen(slave->dev->name)) == 0) {
1010 pr_info("%s: Setting %s as primary slave.\n",
1011 bond->dev->name, slave->dev->name);
1012 bond->primary_slave = slave;
1013 strcpy(bond->params.primary, slave->dev->name);
1014 bond_select_active_slave(bond);
1015 goto out;
1016 }
1017 }
1018
1019 /* if we got here, then we didn't match the name of any slave */
1020
1021 if (strlen(buf) == 0 || buf[0] == '\n') {
1022 pr_info("%s: Setting primary slave to None.\n",
1023 bond->dev->name);
1024 bond->primary_slave = NULL;
1025 bond_select_active_slave(bond);
1026 } else {
1027 pr_info("%s: Unable to set %.*s as primary slave as it is not a slave.\n",
1028 bond->dev->name, (int)strlen(buf) - 1, buf);
1029 }
1030 }
1031 out:
1032 write_unlock_bh(&bond->curr_slave_lock);
1033 read_unlock(&bond->lock);
1034 unblock_netpoll_tx();
1035 rtnl_unlock();
1036
1037 return count;
1038 }
1039 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1040 bonding_show_primary, bonding_store_primary);
1041
1042 /*
1043 * Show and set the primary_reselect flag.
1044 */
1045 static ssize_t bonding_show_primary_reselect(struct device *d,
1046 struct device_attribute *attr,
1047 char *buf)
1048 {
1049 struct bonding *bond = to_bond(d);
1050
1051 return sprintf(buf, "%s %d\n",
1052 pri_reselect_tbl[bond->params.primary_reselect].modename,
1053 bond->params.primary_reselect);
1054 }
1055
1056 static ssize_t bonding_store_primary_reselect(struct device *d,
1057 struct device_attribute *attr,
1058 const char *buf, size_t count)
1059 {
1060 int new_value, ret = count;
1061 struct bonding *bond = to_bond(d);
1062
1063 if (!rtnl_trylock())
1064 return restart_syscall();
1065
1066 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1067 if (new_value < 0) {
1068 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1069 bond->dev->name,
1070 (int) strlen(buf) - 1, buf);
1071 ret = -EINVAL;
1072 goto out;
1073 }
1074
1075 bond->params.primary_reselect = new_value;
1076 pr_info("%s: setting primary_reselect to %s (%d).\n",
1077 bond->dev->name, pri_reselect_tbl[new_value].modename,
1078 new_value);
1079
1080 block_netpoll_tx();
1081 read_lock(&bond->lock);
1082 write_lock_bh(&bond->curr_slave_lock);
1083 bond_select_active_slave(bond);
1084 write_unlock_bh(&bond->curr_slave_lock);
1085 read_unlock(&bond->lock);
1086 unblock_netpoll_tx();
1087 out:
1088 rtnl_unlock();
1089 return ret;
1090 }
1091 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1092 bonding_show_primary_reselect,
1093 bonding_store_primary_reselect);
1094
1095 /*
1096 * Show and set the use_carrier flag.
1097 */
1098 static ssize_t bonding_show_carrier(struct device *d,
1099 struct device_attribute *attr,
1100 char *buf)
1101 {
1102 struct bonding *bond = to_bond(d);
1103
1104 return sprintf(buf, "%d\n", bond->params.use_carrier);
1105 }
1106
1107 static ssize_t bonding_store_carrier(struct device *d,
1108 struct device_attribute *attr,
1109 const char *buf, size_t count)
1110 {
1111 int new_value, ret = count;
1112 struct bonding *bond = to_bond(d);
1113
1114
1115 if (sscanf(buf, "%d", &new_value) != 1) {
1116 pr_err("%s: no use_carrier value specified.\n",
1117 bond->dev->name);
1118 ret = -EINVAL;
1119 goto out;
1120 }
1121 if ((new_value == 0) || (new_value == 1)) {
1122 bond->params.use_carrier = new_value;
1123 pr_info("%s: Setting use_carrier to %d.\n",
1124 bond->dev->name, new_value);
1125 } else {
1126 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1127 bond->dev->name, new_value);
1128 }
1129 out:
1130 return ret;
1131 }
1132 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1133 bonding_show_carrier, bonding_store_carrier);
1134
1135
1136 /*
1137 * Show and set currently active_slave.
1138 */
1139 static ssize_t bonding_show_active_slave(struct device *d,
1140 struct device_attribute *attr,
1141 char *buf)
1142 {
1143 struct slave *curr;
1144 struct bonding *bond = to_bond(d);
1145 int count = 0;
1146
1147 read_lock(&bond->curr_slave_lock);
1148 curr = bond->curr_active_slave;
1149 read_unlock(&bond->curr_slave_lock);
1150
1151 if (USES_PRIMARY(bond->params.mode) && curr)
1152 count = sprintf(buf, "%s\n", curr->dev->name);
1153 return count;
1154 }
1155
1156 static ssize_t bonding_store_active_slave(struct device *d,
1157 struct device_attribute *attr,
1158 const char *buf, size_t count)
1159 {
1160 int i;
1161 struct slave *slave;
1162 struct slave *old_active = NULL;
1163 struct slave *new_active = NULL;
1164 struct bonding *bond = to_bond(d);
1165
1166 if (!rtnl_trylock())
1167 return restart_syscall();
1168
1169 block_netpoll_tx();
1170 read_lock(&bond->lock);
1171 write_lock_bh(&bond->curr_slave_lock);
1172
1173 if (!USES_PRIMARY(bond->params.mode))
1174 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1175 bond->dev->name, bond->dev->name, bond->params.mode);
1176 else {
1177 bond_for_each_slave(bond, slave, i) {
1178 if (strnicmp
1179 (slave->dev->name, buf,
1180 strlen(slave->dev->name)) == 0) {
1181 old_active = bond->curr_active_slave;
1182 new_active = slave;
1183 if (new_active == old_active) {
1184 /* do nothing */
1185 pr_info("%s: %s is already the current active slave.\n",
1186 bond->dev->name,
1187 slave->dev->name);
1188 goto out;
1189 }
1190 else {
1191 if ((new_active) &&
1192 (old_active) &&
1193 (new_active->link == BOND_LINK_UP) &&
1194 IS_UP(new_active->dev)) {
1195 pr_info("%s: Setting %s as active slave.\n",
1196 bond->dev->name,
1197 slave->dev->name);
1198 bond_change_active_slave(bond, new_active);
1199 }
1200 else {
1201 pr_info("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
1202 bond->dev->name,
1203 slave->dev->name,
1204 slave->dev->name);
1205 }
1206 goto out;
1207 }
1208 }
1209 }
1210
1211 /* if we got here, then we didn't match the name of any slave */
1212
1213 if (strlen(buf) == 0 || buf[0] == '\n') {
1214 pr_info("%s: Setting active slave to None.\n",
1215 bond->dev->name);
1216 bond->primary_slave = NULL;
1217 bond_select_active_slave(bond);
1218 } else {
1219 pr_info("%s: Unable to set %.*s as active slave as it is not a slave.\n",
1220 bond->dev->name, (int)strlen(buf) - 1, buf);
1221 }
1222 }
1223 out:
1224 write_unlock_bh(&bond->curr_slave_lock);
1225 read_unlock(&bond->lock);
1226 unblock_netpoll_tx();
1227
1228 rtnl_unlock();
1229
1230 return count;
1231
1232 }
1233 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1234 bonding_show_active_slave, bonding_store_active_slave);
1235
1236
1237 /*
1238 * Show link status of the bond interface.
1239 */
1240 static ssize_t bonding_show_mii_status(struct device *d,
1241 struct device_attribute *attr,
1242 char *buf)
1243 {
1244 struct slave *curr;
1245 struct bonding *bond = to_bond(d);
1246
1247 read_lock(&bond->curr_slave_lock);
1248 curr = bond->curr_active_slave;
1249 read_unlock(&bond->curr_slave_lock);
1250
1251 return sprintf(buf, "%s\n", curr ? "up" : "down");
1252 }
1253 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1254
1255
1256 /*
1257 * Show current 802.3ad aggregator ID.
1258 */
1259 static ssize_t bonding_show_ad_aggregator(struct device *d,
1260 struct device_attribute *attr,
1261 char *buf)
1262 {
1263 int count = 0;
1264 struct bonding *bond = to_bond(d);
1265
1266 if (bond->params.mode == BOND_MODE_8023AD) {
1267 struct ad_info ad_info;
1268 count = sprintf(buf, "%d\n",
1269 (bond_3ad_get_active_agg_info(bond, &ad_info))
1270 ? 0 : ad_info.aggregator_id);
1271 }
1272
1273 return count;
1274 }
1275 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1276
1277
1278 /*
1279 * Show number of active 802.3ad ports.
1280 */
1281 static ssize_t bonding_show_ad_num_ports(struct device *d,
1282 struct device_attribute *attr,
1283 char *buf)
1284 {
1285 int count = 0;
1286 struct bonding *bond = to_bond(d);
1287
1288 if (bond->params.mode == BOND_MODE_8023AD) {
1289 struct ad_info ad_info;
1290 count = sprintf(buf, "%d\n",
1291 (bond_3ad_get_active_agg_info(bond, &ad_info))
1292 ? 0 : ad_info.ports);
1293 }
1294
1295 return count;
1296 }
1297 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1298
1299
1300 /*
1301 * Show current 802.3ad actor key.
1302 */
1303 static ssize_t bonding_show_ad_actor_key(struct device *d,
1304 struct device_attribute *attr,
1305 char *buf)
1306 {
1307 int count = 0;
1308 struct bonding *bond = to_bond(d);
1309
1310 if (bond->params.mode == BOND_MODE_8023AD) {
1311 struct ad_info ad_info;
1312 count = sprintf(buf, "%d\n",
1313 (bond_3ad_get_active_agg_info(bond, &ad_info))
1314 ? 0 : ad_info.actor_key);
1315 }
1316
1317 return count;
1318 }
1319 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1320
1321
1322 /*
1323 * Show current 802.3ad partner key.
1324 */
1325 static ssize_t bonding_show_ad_partner_key(struct device *d,
1326 struct device_attribute *attr,
1327 char *buf)
1328 {
1329 int count = 0;
1330 struct bonding *bond = to_bond(d);
1331
1332 if (bond->params.mode == BOND_MODE_8023AD) {
1333 struct ad_info ad_info;
1334 count = sprintf(buf, "%d\n",
1335 (bond_3ad_get_active_agg_info(bond, &ad_info))
1336 ? 0 : ad_info.partner_key);
1337 }
1338
1339 return count;
1340 }
1341 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1342
1343
1344 /*
1345 * Show current 802.3ad partner mac.
1346 */
1347 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1348 struct device_attribute *attr,
1349 char *buf)
1350 {
1351 int count = 0;
1352 struct bonding *bond = to_bond(d);
1353
1354 if (bond->params.mode == BOND_MODE_8023AD) {
1355 struct ad_info ad_info;
1356 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1357 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1358 }
1359
1360 return count;
1361 }
1362 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1363
1364 /*
1365 * Show the queue_ids of the slaves in the current bond.
1366 */
1367 static ssize_t bonding_show_queue_id(struct device *d,
1368 struct device_attribute *attr,
1369 char *buf)
1370 {
1371 struct slave *slave;
1372 int i, res = 0;
1373 struct bonding *bond = to_bond(d);
1374
1375 if (!rtnl_trylock())
1376 return restart_syscall();
1377
1378 read_lock(&bond->lock);
1379 bond_for_each_slave(bond, slave, i) {
1380 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1381 /* not enough space for another interface_name:queue_id pair */
1382 if ((PAGE_SIZE - res) > 10)
1383 res = PAGE_SIZE - 10;
1384 res += sprintf(buf + res, "++more++ ");
1385 break;
1386 }
1387 res += sprintf(buf + res, "%s:%d ",
1388 slave->dev->name, slave->queue_id);
1389 }
1390 read_unlock(&bond->lock);
1391 if (res)
1392 buf[res-1] = '\n'; /* eat the leftover space */
1393 rtnl_unlock();
1394 return res;
1395 }
1396
1397 /*
1398 * Set the queue_ids of the slaves in the current bond. The bond
1399 * interface must be enslaved for this to work.
1400 */
1401 static ssize_t bonding_store_queue_id(struct device *d,
1402 struct device_attribute *attr,
1403 const char *buffer, size_t count)
1404 {
1405 struct slave *slave, *update_slave;
1406 struct bonding *bond = to_bond(d);
1407 u16 qid;
1408 int i, ret = count;
1409 char *delim;
1410 struct net_device *sdev = NULL;
1411
1412 if (!rtnl_trylock())
1413 return restart_syscall();
1414
1415 /* delim will point to queue id if successful */
1416 delim = strchr(buffer, ':');
1417 if (!delim)
1418 goto err_no_cmd;
1419
1420 /*
1421 * Terminate string that points to device name and bump it
1422 * up one, so we can read the queue id there.
1423 */
1424 *delim = '\0';
1425 if (sscanf(++delim, "%hd\n", &qid) != 1)
1426 goto err_no_cmd;
1427
1428 /* Check buffer length, valid ifname and queue id */
1429 if (strlen(buffer) > IFNAMSIZ ||
1430 !dev_valid_name(buffer) ||
1431 qid > bond->params.tx_queues)
1432 goto err_no_cmd;
1433
1434 /* Get the pointer to that interface if it exists */
1435 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1436 if (!sdev)
1437 goto err_no_cmd;
1438
1439 read_lock(&bond->lock);
1440
1441 /* Search for thes slave and check for duplicate qids */
1442 update_slave = NULL;
1443 bond_for_each_slave(bond, slave, i) {
1444 if (sdev == slave->dev)
1445 /*
1446 * We don't need to check the matching
1447 * slave for dups, since we're overwriting it
1448 */
1449 update_slave = slave;
1450 else if (qid && qid == slave->queue_id) {
1451 goto err_no_cmd_unlock;
1452 }
1453 }
1454
1455 if (!update_slave)
1456 goto err_no_cmd_unlock;
1457
1458 /* Actually set the qids for the slave */
1459 update_slave->queue_id = qid;
1460
1461 read_unlock(&bond->lock);
1462 out:
1463 rtnl_unlock();
1464 return ret;
1465
1466 err_no_cmd_unlock:
1467 read_unlock(&bond->lock);
1468 err_no_cmd:
1469 pr_info("invalid input for queue_id set for %s.\n",
1470 bond->dev->name);
1471 ret = -EPERM;
1472 goto out;
1473 }
1474
1475 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1476 bonding_store_queue_id);
1477
1478
1479 /*
1480 * Show and set the all_slaves_active flag.
1481 */
1482 static ssize_t bonding_show_slaves_active(struct device *d,
1483 struct device_attribute *attr,
1484 char *buf)
1485 {
1486 struct bonding *bond = to_bond(d);
1487
1488 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1489 }
1490
1491 static ssize_t bonding_store_slaves_active(struct device *d,
1492 struct device_attribute *attr,
1493 const char *buf, size_t count)
1494 {
1495 int i, new_value, ret = count;
1496 struct bonding *bond = to_bond(d);
1497 struct slave *slave;
1498
1499 if (sscanf(buf, "%d", &new_value) != 1) {
1500 pr_err("%s: no all_slaves_active value specified.\n",
1501 bond->dev->name);
1502 ret = -EINVAL;
1503 goto out;
1504 }
1505
1506 if (new_value == bond->params.all_slaves_active)
1507 goto out;
1508
1509 if ((new_value == 0) || (new_value == 1)) {
1510 bond->params.all_slaves_active = new_value;
1511 } else {
1512 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1513 bond->dev->name, new_value);
1514 ret = -EINVAL;
1515 goto out;
1516 }
1517
1518 bond_for_each_slave(bond, slave, i) {
1519 if (!bond_is_active_slave(slave)) {
1520 if (new_value)
1521 slave->inactive = 0;
1522 else
1523 slave->inactive = 1;
1524 }
1525 }
1526 out:
1527 return ret;
1528 }
1529 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1530 bonding_show_slaves_active, bonding_store_slaves_active);
1531
1532 /*
1533 * Show and set the number of IGMP membership reports to send on link failure
1534 */
1535 static ssize_t bonding_show_resend_igmp(struct device *d,
1536 struct device_attribute *attr,
1537 char *buf)
1538 {
1539 struct bonding *bond = to_bond(d);
1540
1541 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1542 }
1543
1544 static ssize_t bonding_store_resend_igmp(struct device *d,
1545 struct device_attribute *attr,
1546 const char *buf, size_t count)
1547 {
1548 int new_value, ret = count;
1549 struct bonding *bond = to_bond(d);
1550
1551 if (sscanf(buf, "%d", &new_value) != 1) {
1552 pr_err("%s: no resend_igmp value specified.\n",
1553 bond->dev->name);
1554 ret = -EINVAL;
1555 goto out;
1556 }
1557
1558 if (new_value < 0 || new_value > 255) {
1559 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1560 bond->dev->name, new_value);
1561 ret = -EINVAL;
1562 goto out;
1563 }
1564
1565 pr_info("%s: Setting resend_igmp to %d.\n",
1566 bond->dev->name, new_value);
1567 bond->params.resend_igmp = new_value;
1568 out:
1569 return ret;
1570 }
1571
1572 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1573 bonding_show_resend_igmp, bonding_store_resend_igmp);
1574
1575 static struct attribute *per_bond_attrs[] = {
1576 &dev_attr_slaves.attr,
1577 &dev_attr_mode.attr,
1578 &dev_attr_fail_over_mac.attr,
1579 &dev_attr_arp_validate.attr,
1580 &dev_attr_arp_interval.attr,
1581 &dev_attr_arp_ip_target.attr,
1582 &dev_attr_downdelay.attr,
1583 &dev_attr_updelay.attr,
1584 &dev_attr_lacp_rate.attr,
1585 &dev_attr_ad_select.attr,
1586 &dev_attr_xmit_hash_policy.attr,
1587 &dev_attr_num_grat_arp.attr,
1588 &dev_attr_num_unsol_na.attr,
1589 &dev_attr_miimon.attr,
1590 &dev_attr_primary.attr,
1591 &dev_attr_primary_reselect.attr,
1592 &dev_attr_use_carrier.attr,
1593 &dev_attr_active_slave.attr,
1594 &dev_attr_mii_status.attr,
1595 &dev_attr_ad_aggregator.attr,
1596 &dev_attr_ad_num_ports.attr,
1597 &dev_attr_ad_actor_key.attr,
1598 &dev_attr_ad_partner_key.attr,
1599 &dev_attr_ad_partner_mac.attr,
1600 &dev_attr_queue_id.attr,
1601 &dev_attr_all_slaves_active.attr,
1602 &dev_attr_resend_igmp.attr,
1603 NULL,
1604 };
1605
1606 static struct attribute_group bonding_group = {
1607 .name = "bonding",
1608 .attrs = per_bond_attrs,
1609 };
1610
1611 /*
1612 * Initialize sysfs. This sets up the bonding_masters file in
1613 * /sys/class/net.
1614 */
1615 int bond_create_sysfs(void)
1616 {
1617 int ret;
1618
1619 ret = netdev_class_create_file(&class_attr_bonding_masters);
1620 /*
1621 * Permit multiple loads of the module by ignoring failures to
1622 * create the bonding_masters sysfs file. Bonding devices
1623 * created by second or subsequent loads of the module will
1624 * not be listed in, or controllable by, bonding_masters, but
1625 * will have the usual "bonding" sysfs directory.
1626 *
1627 * This is done to preserve backwards compatibility for
1628 * initscripts/sysconfig, which load bonding multiple times to
1629 * configure multiple bonding devices.
1630 */
1631 if (ret == -EEXIST) {
1632 /* Is someone being kinky and naming a device bonding_master? */
1633 if (__dev_get_by_name(&init_net,
1634 class_attr_bonding_masters.attr.name))
1635 pr_err("network device named %s already exists in sysfs",
1636 class_attr_bonding_masters.attr.name);
1637 ret = 0;
1638 }
1639
1640 return ret;
1641
1642 }
1643
1644 /*
1645 * Remove /sys/class/net/bonding_masters.
1646 */
1647 void bond_destroy_sysfs(void)
1648 {
1649 netdev_class_remove_file(&class_attr_bonding_masters);
1650 }
1651
1652 /*
1653 * Initialize sysfs for each bond. This sets up and registers
1654 * the 'bondctl' directory for each individual bond under /sys/class/net.
1655 */
1656 void bond_prepare_sysfs_group(struct bonding *bond)
1657 {
1658 bond->dev->sysfs_groups[0] = &bonding_group;
1659 }
1660
Linus' kernel tree