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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / net / bonding / bond_options.c
blob11cb943222d5c839ed363715db445351e6b3da56
1 /*
2 * drivers/net/bond/bond_options.c - bonding options
3 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
4 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14 #include <linux/errno.h>
15 #include <linux/if.h>
16 #include <linux/netdevice.h>
17 #include <linux/rwlock.h>
18 #include <linux/rcupdate.h>
19 #include <linux/ctype.h>
20 #include <linux/inet.h>
21 #include "bonding.h"
22
23 static struct bond_opt_value bond_mode_tbl[] = {
24 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
25 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
26 { "balance-xor", BOND_MODE_XOR, 0},
27 { "broadcast", BOND_MODE_BROADCAST, 0},
28 { "802.3ad", BOND_MODE_8023AD, 0},
29 { "balance-tlb", BOND_MODE_TLB, 0},
30 { "balance-alb", BOND_MODE_ALB, 0},
31 { NULL, -1, 0},
32 };
33
34 static struct bond_opt_value bond_pps_tbl[] = {
35 { "default", 1, BOND_VALFLAG_DEFAULT},
36 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
37 { NULL, -1, 0},
38 };
39
40 static struct bond_opt_value bond_xmit_hashtype_tbl[] = {
41 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
42 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
43 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
44 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
45 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
46 { NULL, -1, 0},
47 };
48
49 static struct bond_opt_value bond_arp_validate_tbl[] = {
50 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
51 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
52 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
53 { "all", BOND_ARP_VALIDATE_ALL, 0},
54 { NULL, -1, 0},
55 };
56
57 static struct bond_opt_value bond_arp_all_targets_tbl[] = {
58 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
59 { "all", BOND_ARP_TARGETS_ALL, 0},
60 { NULL, -1, 0},
61 };
62
63 static struct bond_opt_value bond_fail_over_mac_tbl[] = {
64 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
65 { "active", BOND_FOM_ACTIVE, 0},
66 { "follow", BOND_FOM_FOLLOW, 0},
67 { NULL, -1, 0},
68 };
69
70 static struct bond_opt_value bond_intmax_tbl[] = {
71 { "off", 0, BOND_VALFLAG_DEFAULT},
72 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
73 };
74
75 static struct bond_opt_value bond_lacp_rate_tbl[] = {
76 { "slow", AD_LACP_SLOW, 0},
77 { "fast", AD_LACP_FAST, 0},
78 { NULL, -1, 0},
79 };
80
81 static struct bond_opt_value bond_ad_select_tbl[] = {
82 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
83 { "bandwidth", BOND_AD_BANDWIDTH, 0},
84 { "count", BOND_AD_COUNT, 0},
85 { NULL, -1, 0},
86 };
87
88 static struct bond_opt_value bond_num_peer_notif_tbl[] = {
89 { "off", 0, 0},
90 { "maxval", 255, BOND_VALFLAG_MAX},
91 { "default", 1, BOND_VALFLAG_DEFAULT},
92 { NULL, -1, 0}
93 };
94
95 static struct bond_opt_value bond_primary_reselect_tbl[] = {
96 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
97 { "better", BOND_PRI_RESELECT_BETTER, 0},
98 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
99 { NULL, -1},
100 };
101
102 static struct bond_opt_value bond_use_carrier_tbl[] = {
103 { "off", 0, 0},
104 { "on", 1, BOND_VALFLAG_DEFAULT},
105 { NULL, -1, 0}
106 };
107
108 static struct bond_opt_value bond_all_slaves_active_tbl[] = {
109 { "off", 0, BOND_VALFLAG_DEFAULT},
110 { "on", 1, 0},
111 { NULL, -1, 0}
112 };
113
114 static struct bond_opt_value bond_resend_igmp_tbl[] = {
115 { "off", 0, 0},
116 { "maxval", 255, BOND_VALFLAG_MAX},
117 { "default", 1, BOND_VALFLAG_DEFAULT},
118 { NULL, -1, 0}
119 };
120
121 static struct bond_opt_value bond_lp_interval_tbl[] = {
122 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
123 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
124 };
125
126 static struct bond_option bond_opts[] = {
127 [BOND_OPT_MODE] = {
128 .id = BOND_OPT_MODE,
129 .name = "mode",
130 .desc = "bond device mode",
131 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
132 .values = bond_mode_tbl,
133 .set = bond_option_mode_set
134 },
135 [BOND_OPT_PACKETS_PER_SLAVE] = {
136 .id = BOND_OPT_PACKETS_PER_SLAVE,
137 .name = "packets_per_slave",
138 .desc = "Packets to send per slave in RR mode",
139 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
140 .values = bond_pps_tbl,
141 .set = bond_option_pps_set
142 },
143 [BOND_OPT_XMIT_HASH] = {
144 .id = BOND_OPT_XMIT_HASH,
145 .name = "xmit_hash_policy",
146 .desc = "balance-xor and 802.3ad hashing method",
147 .values = bond_xmit_hashtype_tbl,
148 .set = bond_option_xmit_hash_policy_set
149 },
150 [BOND_OPT_ARP_VALIDATE] = {
151 .id = BOND_OPT_ARP_VALIDATE,
152 .name = "arp_validate",
153 .desc = "validate src/dst of ARP probes",
154 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP)),
155 .values = bond_arp_validate_tbl,
156 .set = bond_option_arp_validate_set
157 },
158 [BOND_OPT_ARP_ALL_TARGETS] = {
159 .id = BOND_OPT_ARP_ALL_TARGETS,
160 .name = "arp_all_targets",
161 .desc = "fail on any/all arp targets timeout",
162 .values = bond_arp_all_targets_tbl,
163 .set = bond_option_arp_all_targets_set
164 },
165 [BOND_OPT_FAIL_OVER_MAC] = {
166 .id = BOND_OPT_FAIL_OVER_MAC,
167 .name = "fail_over_mac",
168 .desc = "For active-backup, do not set all slaves to the same MAC",
169 .flags = BOND_OPTFLAG_NOSLAVES,
170 .values = bond_fail_over_mac_tbl,
171 .set = bond_option_fail_over_mac_set
172 },
173 [BOND_OPT_ARP_INTERVAL] = {
174 .id = BOND_OPT_ARP_INTERVAL,
175 .name = "arp_interval",
176 .desc = "arp interval in milliseconds",
177 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
178 BIT(BOND_MODE_ALB),
179 .values = bond_intmax_tbl,
180 .set = bond_option_arp_interval_set
181 },
182 [BOND_OPT_ARP_TARGETS] = {
183 .id = BOND_OPT_ARP_TARGETS,
184 .name = "arp_ip_target",
185 .desc = "arp targets in n.n.n.n form",
186 .flags = BOND_OPTFLAG_RAWVAL,
187 .set = bond_option_arp_ip_targets_set
188 },
189 [BOND_OPT_DOWNDELAY] = {
190 .id = BOND_OPT_DOWNDELAY,
191 .name = "downdelay",
192 .desc = "Delay before considering link down, in milliseconds",
193 .values = bond_intmax_tbl,
194 .set = bond_option_downdelay_set
195 },
196 [BOND_OPT_UPDELAY] = {
197 .id = BOND_OPT_UPDELAY,
198 .name = "updelay",
199 .desc = "Delay before considering link up, in milliseconds",
200 .values = bond_intmax_tbl,
201 .set = bond_option_updelay_set
202 },
203 [BOND_OPT_LACP_RATE] = {
204 .id = BOND_OPT_LACP_RATE,
205 .name = "lacp_rate",
206 .desc = "LACPDU tx rate to request from 802.3ad partner",
207 .flags = BOND_OPTFLAG_IFDOWN,
208 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
209 .values = bond_lacp_rate_tbl,
210 .set = bond_option_lacp_rate_set
211 },
212 [BOND_OPT_MINLINKS] = {
213 .id = BOND_OPT_MINLINKS,
214 .name = "min_links",
215 .desc = "Minimum number of available links before turning on carrier",
216 .values = bond_intmax_tbl,
217 .set = bond_option_min_links_set
218 },
219 [BOND_OPT_AD_SELECT] = {
220 .id = BOND_OPT_AD_SELECT,
221 .name = "ad_select",
222 .desc = "803.ad aggregation selection logic",
223 .flags = BOND_OPTFLAG_IFDOWN,
224 .values = bond_ad_select_tbl,
225 .set = bond_option_ad_select_set
226 },
227 [BOND_OPT_NUM_PEER_NOTIF] = {
228 .id = BOND_OPT_NUM_PEER_NOTIF,
229 .name = "num_unsol_na",
230 .desc = "Number of peer notifications to send on failover event",
231 .values = bond_num_peer_notif_tbl,
232 .set = bond_option_num_peer_notif_set
233 },
234 [BOND_OPT_MIIMON] = {
235 .id = BOND_OPT_MIIMON,
236 .name = "miimon",
237 .desc = "Link check interval in milliseconds",
238 .values = bond_intmax_tbl,
239 .set = bond_option_miimon_set
240 },
241 [BOND_OPT_PRIMARY] = {
242 .id = BOND_OPT_PRIMARY,
243 .name = "primary",
244 .desc = "Primary network device to use",
245 .flags = BOND_OPTFLAG_RAWVAL,
246 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
247 BIT(BOND_MODE_TLB) |
248 BIT(BOND_MODE_ALB)),
249 .set = bond_option_primary_set
250 },
251 [BOND_OPT_PRIMARY_RESELECT] = {
252 .id = BOND_OPT_PRIMARY_RESELECT,
253 .name = "primary_reselect",
254 .desc = "Reselect primary slave once it comes up",
255 .values = bond_primary_reselect_tbl,
256 .set = bond_option_primary_reselect_set
257 },
258 [BOND_OPT_USE_CARRIER] = {
259 .id = BOND_OPT_USE_CARRIER,
260 .name = "use_carrier",
261 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
262 .values = bond_use_carrier_tbl,
263 .set = bond_option_use_carrier_set
264 },
265 [BOND_OPT_ACTIVE_SLAVE] = {
266 .id = BOND_OPT_ACTIVE_SLAVE,
267 .name = "active_slave",
268 .desc = "Currently active slave",
269 .flags = BOND_OPTFLAG_RAWVAL,
270 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
271 BIT(BOND_MODE_TLB) |
272 BIT(BOND_MODE_ALB)),
273 .set = bond_option_active_slave_set
274 },
275 [BOND_OPT_QUEUE_ID] = {
276 .id = BOND_OPT_QUEUE_ID,
277 .name = "queue_id",
278 .desc = "Set queue id of a slave",
279 .flags = BOND_OPTFLAG_RAWVAL,
280 .set = bond_option_queue_id_set
281 },
282 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
283 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
284 .name = "all_slaves_active",
285 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
286 .values = bond_all_slaves_active_tbl,
287 .set = bond_option_all_slaves_active_set
288 },
289 [BOND_OPT_RESEND_IGMP] = {
290 .id = BOND_OPT_RESEND_IGMP,
291 .name = "resend_igmp",
292 .desc = "Number of IGMP membership reports to send on link failure",
293 .values = bond_resend_igmp_tbl,
294 .set = bond_option_resend_igmp_set
295 },
296 [BOND_OPT_LP_INTERVAL] = {
297 .id = BOND_OPT_LP_INTERVAL,
298 .name = "lp_interval",
299 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
300 .values = bond_lp_interval_tbl,
301 .set = bond_option_lp_interval_set
302 },
303 [BOND_OPT_SLAVES] = {
304 .id = BOND_OPT_SLAVES,
305 .name = "slaves",
306 .desc = "Slave membership management",
307 .flags = BOND_OPTFLAG_RAWVAL,
308 .set = bond_option_slaves_set
309 },
310 { }
311 };
312
313 /* Searches for a value in opt's values[] table */
314 struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
315 {
316 struct bond_option *opt;
317 int i;
318
319 opt = bond_opt_get(option);
320 if (WARN_ON(!opt))
321 return NULL;
322 for (i = 0; opt->values && opt->values[i].string; i++)
323 if (opt->values[i].value == val)
324 return &opt->values[i];
325
326 return NULL;
327 }
328
329 /* Searches for a value in opt's values[] table which matches the flagmask */
330 static struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
331 u32 flagmask)
332 {
333 int i;
334
335 for (i = 0; opt->values && opt->values[i].string; i++)
336 if (opt->values[i].flags & flagmask)
337 return &opt->values[i];
338
339 return NULL;
340 }
341
342 /* If maxval is missing then there's no range to check. In case minval is
343 * missing then it's considered to be 0.
344 */
345 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
346 {
347 struct bond_opt_value *minval, *maxval;
348
349 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
350 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
351 if (!maxval || (minval && val < minval->value) || val > maxval->value)
352 return false;
353
354 return true;
355 }
356
357 /**
358 * bond_opt_parse - parse option value
359 * @opt: the option to parse against
360 * @val: value to parse
361 *
362 * This function tries to extract the value from @val and check if it's
363 * a possible match for the option and returns NULL if a match isn't found,
364 * or the struct_opt_value that matched. It also strips the new line from
365 * @val->string if it's present.
366 */
367 struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
368 struct bond_opt_value *val)
369 {
370 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
371 struct bond_opt_value *tbl, *ret = NULL;
372 bool checkval;
373 int i, rv;
374
375 /* No parsing if the option wants a raw val */
376 if (opt->flags & BOND_OPTFLAG_RAWVAL)
377 return val;
378
379 tbl = opt->values;
380 if (!tbl)
381 goto out;
382
383 /* ULLONG_MAX is used to bypass string processing */
384 checkval = val->value != ULLONG_MAX;
385 if (!checkval) {
386 if (!val->string)
387 goto out;
388 p = strchr(val->string, '\n');
389 if (p)
390 *p = '\0';
391 for (p = val->string; *p; p++)
392 if (!(isdigit(*p) || isspace(*p)))
393 break;
394 /* The following code extracts the string to match or the value
395 * and sets checkval appropriately
396 */
397 if (*p) {
398 rv = sscanf(val->string, "%32s", valstr);
399 } else {
400 rv = sscanf(val->string, "%llu", &val->value);
401 checkval = true;
402 }
403 if (!rv)
404 goto out;
405 }
406
407 for (i = 0; tbl[i].string; i++) {
408 /* Check for exact match */
409 if (checkval) {
410 if (val->value == tbl[i].value)
411 ret = &tbl[i];
412 } else {
413 if (!strcmp(valstr, "default") &&
414 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
415 ret = &tbl[i];
416
417 if (!strcmp(valstr, tbl[i].string))
418 ret = &tbl[i];
419 }
420 /* Found an exact match */
421 if (ret)
422 goto out;
423 }
424 /* Possible range match */
425 if (checkval && bond_opt_check_range(opt, val->value))
426 ret = val;
427 out:
428 return ret;
429 }
430
431 /* Check opt's dependencies against bond mode and currently set options */
432 static int bond_opt_check_deps(struct bonding *bond,
433 const struct bond_option *opt)
434 {
435 struct bond_params *params = &bond->params;
436
437 if (test_bit(params->mode, &opt->unsuppmodes))
438 return -EACCES;
439 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
440 return -ENOTEMPTY;
441 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
442 return -EBUSY;
443
444 return 0;
445 }
446
447 static void bond_opt_dep_print(struct bonding *bond,
448 const struct bond_option *opt)
449 {
450 struct bond_opt_value *modeval;
451 struct bond_params *params;
452
453 params = &bond->params;
454 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
455 if (test_bit(params->mode, &opt->unsuppmodes))
456 pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n",
457 bond->dev->name, opt->name,
458 modeval->string, modeval->value);
459 }
460
461 static void bond_opt_error_interpret(struct bonding *bond,
462 const struct bond_option *opt,
463 int error, struct bond_opt_value *val)
464 {
465 struct bond_opt_value *minval, *maxval;
466 char *p;
467
468 switch (error) {
469 case -EINVAL:
470 if (val) {
471 if (val->string) {
472 /* sometimes RAWVAL opts may have new lines */
473 p = strchr(val->string, '\n');
474 if (p)
475 *p = '\0';
476 pr_err("%s: option %s: invalid value (%s).\n",
477 bond->dev->name, opt->name, val->string);
478 } else {
479 pr_err("%s: option %s: invalid value (%llu).\n",
480 bond->dev->name, opt->name, val->value);
481 }
482 }
483 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
484 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
485 if (!maxval)
486 break;
487 pr_err("%s: option %s: allowed values %llu - %llu.\n",
488 bond->dev->name, opt->name, minval ? minval->value : 0,
489 maxval->value);
490 break;
491 case -EACCES:
492 bond_opt_dep_print(bond, opt);
493 break;
494 case -ENOTEMPTY:
495 pr_err("%s: option %s: unable to set because the bond device has slaves.\n",
496 bond->dev->name, opt->name);
497 break;
498 case -EBUSY:
499 pr_err("%s: option %s: unable to set because the bond device is up.\n",
500 bond->dev->name, opt->name);
501 break;
502 default:
503 break;
504 }
505 }
506
507 /**
508 * __bond_opt_set - set a bonding option
509 * @bond: target bond device
510 * @option: option to set
511 * @val: value to set it to
512 *
513 * This function is used to change the bond's option value, it can be
514 * used for both enabling/changing an option and for disabling it. RTNL lock
515 * must be obtained before calling this function.
516 */
517 int __bond_opt_set(struct bonding *bond,
518 unsigned int option, struct bond_opt_value *val)
519 {
520 struct bond_opt_value *retval = NULL;
521 const struct bond_option *opt;
522 int ret = -ENOENT;
523
524 ASSERT_RTNL();
525
526 opt = bond_opt_get(option);
527 if (WARN_ON(!val) || WARN_ON(!opt))
528 goto out;
529 ret = bond_opt_check_deps(bond, opt);
530 if (ret)
531 goto out;
532 retval = bond_opt_parse(opt, val);
533 if (!retval) {
534 ret = -EINVAL;
535 goto out;
536 }
537 ret = opt->set(bond, retval);
538 out:
539 if (ret)
540 bond_opt_error_interpret(bond, opt, ret, val);
541
542 return ret;
543 }
544
545 /**
546 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
547 * @bond: target bond device
548 * @option: option to set
549 * @buf: value to set it to
550 *
551 * This function tries to acquire RTNL without blocking and if successful
552 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
553 */
554 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
555 {
556 struct bond_opt_value optval;
557 int ret;
558
559 if (!rtnl_trylock())
560 return restart_syscall();
561 bond_opt_initstr(&optval, buf);
562 ret = __bond_opt_set(bond, option, &optval);
563 rtnl_unlock();
564
565 return ret;
566 }
567
568 /**
569 * bond_opt_get - get a pointer to an option
570 * @option: option for which to return a pointer
571 *
572 * This function checks if option is valid and if so returns a pointer
573 * to its entry in the bond_opts[] option array.
574 */
575 struct bond_option *bond_opt_get(unsigned int option)
576 {
577 if (!BOND_OPT_VALID(option))
578 return NULL;
579
580 return &bond_opts[option];
581 }
582
583 int bond_option_mode_set(struct bonding *bond, struct bond_opt_value *newval)
584 {
585 if (BOND_NO_USES_ARP(newval->value) && bond->params.arp_interval) {
586 pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n",
587 bond->dev->name, newval->string);
588 /* disable arp monitoring */
589 bond->params.arp_interval = 0;
590 /* set miimon to default value */
591 bond->params.miimon = BOND_DEFAULT_MIIMON;
592 pr_info("%s: Setting MII monitoring interval to %d.\n",
593 bond->dev->name, bond->params.miimon);
594 }
595
596 /* don't cache arp_validate between modes */
597 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
598 bond->params.mode = newval->value;
599
600 return 0;
601 }
602
603 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
604 struct slave *slave)
605 {
606 return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL;
607 }
608
609 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
610 {
611 struct slave *slave = rcu_dereference(bond->curr_active_slave);
612
613 return __bond_option_active_slave_get(bond, slave);
614 }
615
616 struct net_device *bond_option_active_slave_get(struct bonding *bond)
617 {
618 return __bond_option_active_slave_get(bond, bond->curr_active_slave);
619 }
620
621 int bond_option_active_slave_set(struct bonding *bond,
622 struct bond_opt_value *newval)
623 {
624 char ifname[IFNAMSIZ] = { 0, };
625 struct net_device *slave_dev;
626 int ret = 0;
627
628 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
629 if (!strlen(ifname) || newval->string[0] == '\n') {
630 slave_dev = NULL;
631 } else {
632 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
633 if (!slave_dev)
634 return -ENODEV;
635 }
636
637 if (slave_dev) {
638 if (!netif_is_bond_slave(slave_dev)) {
639 pr_err("Device %s is not bonding slave.\n",
640 slave_dev->name);
641 return -EINVAL;
642 }
643
644 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
645 pr_err("%s: Device %s is not our slave.\n",
646 bond->dev->name, slave_dev->name);
647 return -EINVAL;
648 }
649 }
650
651 block_netpoll_tx();
652 write_lock_bh(&bond->curr_slave_lock);
653
654 /* check to see if we are clearing active */
655 if (!slave_dev) {
656 pr_info("%s: Clearing current active slave.\n",
657 bond->dev->name);
658 rcu_assign_pointer(bond->curr_active_slave, NULL);
659 bond_select_active_slave(bond);
660 } else {
661 struct slave *old_active = bond->curr_active_slave;
662 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
663
664 BUG_ON(!new_active);
665
666 if (new_active == old_active) {
667 /* do nothing */
668 pr_info("%s: %s is already the current active slave.\n",
669 bond->dev->name, new_active->dev->name);
670 } else {
671 if (old_active && (new_active->link == BOND_LINK_UP) &&
672 IS_UP(new_active->dev)) {
673 pr_info("%s: Setting %s as active slave.\n",
674 bond->dev->name, new_active->dev->name);
675 bond_change_active_slave(bond, new_active);
676 } else {
677 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
678 bond->dev->name, new_active->dev->name,
679 new_active->dev->name);
680 ret = -EINVAL;
681 }
682 }
683 }
684
685 write_unlock_bh(&bond->curr_slave_lock);
686 unblock_netpoll_tx();
687
688 return ret;
689 }
690
691 int bond_option_miimon_set(struct bonding *bond, struct bond_opt_value *newval)
692 {
693 pr_info("%s: Setting MII monitoring interval to %llu.\n",
694 bond->dev->name, newval->value);
695 bond->params.miimon = newval->value;
696 if (bond->params.updelay)
697 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
698 bond->dev->name,
699 bond->params.updelay * bond->params.miimon);
700 if (bond->params.downdelay)
701 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
702 bond->dev->name,
703 bond->params.downdelay * bond->params.miimon);
704 if (newval->value && bond->params.arp_interval) {
705 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
706 bond->dev->name);
707 bond->params.arp_interval = 0;
708 if (bond->params.arp_validate)
709 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
710 }
711 if (bond->dev->flags & IFF_UP) {
712 /* If the interface is up, we may need to fire off
713 * the MII timer. If the interface is down, the
714 * timer will get fired off when the open function
715 * is called.
716 */
717 if (!newval->value) {
718 cancel_delayed_work_sync(&bond->mii_work);
719 } else {
720 cancel_delayed_work_sync(&bond->arp_work);
721 queue_delayed_work(bond->wq, &bond->mii_work, 0);
722 }
723 }
724
725 return 0;
726 }
727
728 int bond_option_updelay_set(struct bonding *bond, struct bond_opt_value *newval)
729 {
730 int value = newval->value;
731
732 if (!bond->params.miimon) {
733 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
734 bond->dev->name);
735 return -EPERM;
736 }
737 if ((value % bond->params.miimon) != 0) {
738 pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
739 bond->dev->name, value,
740 bond->params.miimon,
741 (value / bond->params.miimon) *
742 bond->params.miimon);
743 }
744 bond->params.updelay = value / bond->params.miimon;
745 pr_info("%s: Setting up delay to %d.\n",
746 bond->dev->name,
747 bond->params.updelay * bond->params.miimon);
748
749 return 0;
750 }
751
752 int bond_option_downdelay_set(struct bonding *bond,
753 struct bond_opt_value *newval)
754 {
755 int value = newval->value;
756
757 if (!bond->params.miimon) {
758 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
759 bond->dev->name);
760 return -EPERM;
761 }
762 if ((value % bond->params.miimon) != 0) {
763 pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
764 bond->dev->name, value,
765 bond->params.miimon,
766 (value / bond->params.miimon) *
767 bond->params.miimon);
768 }
769 bond->params.downdelay = value / bond->params.miimon;
770 pr_info("%s: Setting down delay to %d.\n",
771 bond->dev->name,
772 bond->params.downdelay * bond->params.miimon);
773
774 return 0;
775 }
776
777 int bond_option_use_carrier_set(struct bonding *bond,
778 struct bond_opt_value *newval)
779 {
780 pr_info("%s: Setting use_carrier to %llu.\n",
781 bond->dev->name, newval->value);
782 bond->params.use_carrier = newval->value;
783
784 return 0;
785 }
786
787 int bond_option_arp_interval_set(struct bonding *bond,
788 struct bond_opt_value *newval)
789 {
790 pr_info("%s: Setting ARP monitoring interval to %llu.\n",
791 bond->dev->name, newval->value);
792 bond->params.arp_interval = newval->value;
793 if (newval->value) {
794 if (bond->params.miimon) {
795 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
796 bond->dev->name, bond->dev->name);
797 bond->params.miimon = 0;
798 }
799 if (!bond->params.arp_targets[0])
800 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
801 bond->dev->name);
802 }
803 if (bond->dev->flags & IFF_UP) {
804 /* If the interface is up, we may need to fire off
805 * the ARP timer. If the interface is down, the
806 * timer will get fired off when the open function
807 * is called.
808 */
809 if (!newval->value) {
810 if (bond->params.arp_validate)
811 bond->recv_probe = NULL;
812 cancel_delayed_work_sync(&bond->arp_work);
813 } else {
814 /* arp_validate can be set only in active-backup mode */
815 if (bond->params.arp_validate)
816 bond->recv_probe = bond_arp_rcv;
817 cancel_delayed_work_sync(&bond->mii_work);
818 queue_delayed_work(bond->wq, &bond->arp_work, 0);
819 }
820 }
821
822 return 0;
823 }
824
825 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
826 __be32 target,
827 unsigned long last_rx)
828 {
829 __be32 *targets = bond->params.arp_targets;
830 struct list_head *iter;
831 struct slave *slave;
832
833 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
834 bond_for_each_slave(bond, slave, iter)
835 slave->target_last_arp_rx[slot] = last_rx;
836 targets[slot] = target;
837 }
838 }
839
840 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
841 {
842 __be32 *targets = bond->params.arp_targets;
843 int ind;
844
845 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
846 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
847 bond->dev->name, &target);
848 return -EINVAL;
849 }
850
851 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
852 pr_err("%s: ARP target %pI4 is already present\n",
853 bond->dev->name, &target);
854 return -EINVAL;
855 }
856
857 ind = bond_get_targets_ip(targets, 0); /* first free slot */
858 if (ind == -1) {
859 pr_err("%s: ARP target table is full!\n",
860 bond->dev->name);
861 return -EINVAL;
862 }
863
864 pr_info("%s: adding ARP target %pI4.\n", bond->dev->name, &target);
865
866 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
867
868 return 0;
869 }
870
871 int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
872 {
873 int ret;
874
875 /* not to race with bond_arp_rcv */
876 write_lock_bh(&bond->lock);
877 ret = _bond_option_arp_ip_target_add(bond, target);
878 write_unlock_bh(&bond->lock);
879
880 return ret;
881 }
882
883 int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
884 {
885 __be32 *targets = bond->params.arp_targets;
886 struct list_head *iter;
887 struct slave *slave;
888 unsigned long *targets_rx;
889 int ind, i;
890
891 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
892 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
893 bond->dev->name, &target);
894 return -EINVAL;
895 }
896
897 ind = bond_get_targets_ip(targets, target);
898 if (ind == -1) {
899 pr_err("%s: unable to remove nonexistent ARP target %pI4.\n",
900 bond->dev->name, &target);
901 return -EINVAL;
902 }
903
904 if (ind == 0 && !targets[1] && bond->params.arp_interval)
905 pr_warn("%s: removing last arp target with arp_interval on\n",
906 bond->dev->name);
907
908 pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
909 &target);
910
911 /* not to race with bond_arp_rcv */
912 write_lock_bh(&bond->lock);
913
914 bond_for_each_slave(bond, slave, iter) {
915 targets_rx = slave->target_last_arp_rx;
916 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
917 targets_rx[i] = targets_rx[i+1];
918 targets_rx[i] = 0;
919 }
920 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
921 targets[i] = targets[i+1];
922 targets[i] = 0;
923
924 write_unlock_bh(&bond->lock);
925
926 return 0;
927 }
928
929 void bond_option_arp_ip_targets_clear(struct bonding *bond)
930 {
931 int i;
932
933 /* not to race with bond_arp_rcv */
934 write_lock_bh(&bond->lock);
935 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
936 _bond_options_arp_ip_target_set(bond, i, 0, 0);
937 write_unlock_bh(&bond->lock);
938 }
939
940 int bond_option_arp_ip_targets_set(struct bonding *bond,
941 struct bond_opt_value *newval)
942 {
943 int ret = -EPERM;
944 __be32 target;
945
946 if (newval->string) {
947 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
948 pr_err("%s: invalid ARP target %pI4 specified\n",
949 bond->dev->name, &target);
950 return ret;
951 }
952 if (newval->string[0] == '+')
953 ret = bond_option_arp_ip_target_add(bond, target);
954 else if (newval->string[0] == '-')
955 ret = bond_option_arp_ip_target_rem(bond, target);
956 else
957 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
958 bond->dev->name);
959 } else {
960 target = newval->value;
961 ret = bond_option_arp_ip_target_add(bond, target);
962 }
963
964 return ret;
965 }
966
967 int bond_option_arp_validate_set(struct bonding *bond,
968 struct bond_opt_value *newval)
969 {
970 pr_info("%s: setting arp_validate to %s (%llu).\n",
971 bond->dev->name, newval->string, newval->value);
972
973 if (bond->dev->flags & IFF_UP) {
974 if (!newval->value)
975 bond->recv_probe = NULL;
976 else if (bond->params.arp_interval)
977 bond->recv_probe = bond_arp_rcv;
978 }
979 bond->params.arp_validate = newval->value;
980
981 return 0;
982 }
983
984 int bond_option_arp_all_targets_set(struct bonding *bond,
985 struct bond_opt_value *newval)
986 {
987 pr_info("%s: setting arp_all_targets to %s (%llu).\n",
988 bond->dev->name, newval->string, newval->value);
989 bond->params.arp_all_targets = newval->value;
990
991 return 0;
992 }
993
994 int bond_option_primary_set(struct bonding *bond, struct bond_opt_value *newval)
995 {
996 char *p, *primary = newval->string;
997 struct list_head *iter;
998 struct slave *slave;
999
1000 block_netpoll_tx();
1001 read_lock(&bond->lock);
1002 write_lock_bh(&bond->curr_slave_lock);
1003
1004 p = strchr(primary, '\n');
1005 if (p)
1006 *p = '\0';
1007 /* check to see if we are clearing primary */
1008 if (!strlen(primary)) {
1009 pr_info("%s: Setting primary slave to None.\n",
1010 bond->dev->name);
1011 bond->primary_slave = NULL;
1012 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1013 bond_select_active_slave(bond);
1014 goto out;
1015 }
1016
1017 bond_for_each_slave(bond, slave, iter) {
1018 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1019 pr_info("%s: Setting %s as primary slave.\n",
1020 bond->dev->name, slave->dev->name);
1021 bond->primary_slave = slave;
1022 strcpy(bond->params.primary, slave->dev->name);
1023 bond_select_active_slave(bond);
1024 goto out;
1025 }
1026 }
1027
1028 if (bond->primary_slave) {
1029 pr_info("%s: Setting primary slave to None.\n",
1030 bond->dev->name);
1031 bond->primary_slave = NULL;
1032 bond_select_active_slave(bond);
1033 }
1034 strncpy(bond->params.primary, primary, IFNAMSIZ);
1035 bond->params.primary[IFNAMSIZ - 1] = 0;
1036
1037 pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet.\n",
1038 bond->dev->name, primary, bond->dev->name);
1039
1040 out:
1041 write_unlock_bh(&bond->curr_slave_lock);
1042 read_unlock(&bond->lock);
1043 unblock_netpoll_tx();
1044
1045 return 0;
1046 }
1047
1048 int bond_option_primary_reselect_set(struct bonding *bond,
1049 struct bond_opt_value *newval)
1050 {
1051 pr_info("%s: setting primary_reselect to %s (%llu).\n",
1052 bond->dev->name, newval->string, newval->value);
1053 bond->params.primary_reselect = newval->value;
1054
1055 block_netpoll_tx();
1056 write_lock_bh(&bond->curr_slave_lock);
1057 bond_select_active_slave(bond);
1058 write_unlock_bh(&bond->curr_slave_lock);
1059 unblock_netpoll_tx();
1060
1061 return 0;
1062 }
1063
1064 int bond_option_fail_over_mac_set(struct bonding *bond,
1065 struct bond_opt_value *newval)
1066 {
1067 pr_info("%s: Setting fail_over_mac to %s (%llu).\n",
1068 bond->dev->name, newval->string, newval->value);
1069 bond->params.fail_over_mac = newval->value;
1070
1071 return 0;
1072 }
1073
1074 int bond_option_xmit_hash_policy_set(struct bonding *bond,
1075 struct bond_opt_value *newval)
1076 {
1077 pr_info("%s: setting xmit hash policy to %s (%llu).\n",
1078 bond->dev->name, newval->string, newval->value);
1079 bond->params.xmit_policy = newval->value;
1080
1081 return 0;
1082 }
1083
1084 int bond_option_resend_igmp_set(struct bonding *bond,
1085 struct bond_opt_value *newval)
1086 {
1087 pr_info("%s: Setting resend_igmp to %llu.\n",
1088 bond->dev->name, newval->value);
1089 bond->params.resend_igmp = newval->value;
1090
1091 return 0;
1092 }
1093
1094 int bond_option_num_peer_notif_set(struct bonding *bond,
1095 struct bond_opt_value *newval)
1096 {
1097 bond->params.num_peer_notif = newval->value;
1098
1099 return 0;
1100 }
1101
1102 int bond_option_all_slaves_active_set(struct bonding *bond,
1103 struct bond_opt_value *newval)
1104 {
1105 struct list_head *iter;
1106 struct slave *slave;
1107
1108 if (newval->value == bond->params.all_slaves_active)
1109 return 0;
1110 bond->params.all_slaves_active = newval->value;
1111 bond_for_each_slave(bond, slave, iter) {
1112 if (!bond_is_active_slave(slave)) {
1113 if (newval->value)
1114 slave->inactive = 0;
1115 else
1116 slave->inactive = 1;
1117 }
1118 }
1119
1120 return 0;
1121 }
1122
1123 int bond_option_min_links_set(struct bonding *bond,
1124 struct bond_opt_value *newval)
1125 {
1126 pr_info("%s: Setting min links value to %llu\n",
1127 bond->dev->name, newval->value);
1128 bond->params.min_links = newval->value;
1129
1130 return 0;
1131 }
1132
1133 int bond_option_lp_interval_set(struct bonding *bond,
1134 struct bond_opt_value *newval)
1135 {
1136 bond->params.lp_interval = newval->value;
1137
1138 return 0;
1139 }
1140
1141 int bond_option_pps_set(struct bonding *bond, struct bond_opt_value *newval)
1142 {
1143 bond->params.packets_per_slave = newval->value;
1144 if (newval->value > 0) {
1145 bond->params.reciprocal_packets_per_slave =
1146 reciprocal_value(newval->value);
1147 } else {
1148 /* reciprocal_packets_per_slave is unused if
1149 * packets_per_slave is 0 or 1, just initialize it
1150 */
1151 bond->params.reciprocal_packets_per_slave =
1152 (struct reciprocal_value) { 0 };
1153 }
1154
1155 return 0;
1156 }
1157
1158 int bond_option_lacp_rate_set(struct bonding *bond,
1159 struct bond_opt_value *newval)
1160 {
1161 pr_info("%s: Setting LACP rate to %s (%llu).\n",
1162 bond->dev->name, newval->string, newval->value);
1163 bond->params.lacp_fast = newval->value;
1164 bond_3ad_update_lacp_rate(bond);
1165
1166 return 0;
1167 }
1168
1169 int bond_option_ad_select_set(struct bonding *bond,
1170 struct bond_opt_value *newval)
1171 {
1172 pr_info("%s: Setting ad_select to %s (%llu).\n",
1173 bond->dev->name, newval->string, newval->value);
1174 bond->params.ad_select = newval->value;
1175
1176 return 0;
1177 }
1178
1179 int bond_option_queue_id_set(struct bonding *bond,
1180 struct bond_opt_value *newval)
1181 {
1182 struct slave *slave, *update_slave;
1183 struct net_device *sdev;
1184 struct list_head *iter;
1185 char *delim;
1186 int ret = 0;
1187 u16 qid;
1188
1189 /* delim will point to queue id if successful */
1190 delim = strchr(newval->string, ':');
1191 if (!delim)
1192 goto err_no_cmd;
1193
1194 /* Terminate string that points to device name and bump it
1195 * up one, so we can read the queue id there.
1196 */
1197 *delim = '\0';
1198 if (sscanf(++delim, "%hd\n", &qid) != 1)
1199 goto err_no_cmd;
1200
1201 /* Check buffer length, valid ifname and queue id */
1202 if (strlen(newval->string) > IFNAMSIZ ||
1203 !dev_valid_name(newval->string) ||
1204 qid > bond->dev->real_num_tx_queues)
1205 goto err_no_cmd;
1206
1207 /* Get the pointer to that interface if it exists */
1208 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1209 if (!sdev)
1210 goto err_no_cmd;
1211
1212 /* Search for thes slave and check for duplicate qids */
1213 update_slave = NULL;
1214 bond_for_each_slave(bond, slave, iter) {
1215 if (sdev == slave->dev)
1216 /* We don't need to check the matching
1217 * slave for dups, since we're overwriting it
1218 */
1219 update_slave = slave;
1220 else if (qid && qid == slave->queue_id) {
1221 goto err_no_cmd;
1222 }
1223 }
1224
1225 if (!update_slave)
1226 goto err_no_cmd;
1227
1228 /* Actually set the qids for the slave */
1229 update_slave->queue_id = qid;
1230
1231 out:
1232 return ret;
1233
1234 err_no_cmd:
1235 pr_info("invalid input for queue_id set for %s.\n",
1236 bond->dev->name);
1237 ret = -EPERM;
1238 goto out;
1239
1240 }
1241
1242 int bond_option_slaves_set(struct bonding *bond, struct bond_opt_value *newval)
1243 {
1244 char command[IFNAMSIZ + 1] = { 0, };
1245 struct net_device *dev;
1246 char *ifname;
1247 int ret;
1248
1249 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1250 ifname = command + 1;
1251 if ((strlen(command) <= 1) ||
1252 !dev_valid_name(ifname))
1253 goto err_no_cmd;
1254
1255 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1256 if (!dev) {
1257 pr_info("%s: Interface %s does not exist!\n",
1258 bond->dev->name, ifname);
1259 ret = -ENODEV;
1260 goto out;
1261 }
1262
1263 switch (command[0]) {
1264 case '+':
1265 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
1266 ret = bond_enslave(bond->dev, dev);
1267 break;
1268
1269 case '-':
1270 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
1271 ret = bond_release(bond->dev, dev);
1272 break;
1273
1274 default:
1275 goto err_no_cmd;
1276 }
1277
1278 out:
1279 return ret;
1280
1281 err_no_cmd:
1282 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
1283 bond->dev->name);
1284 ret = -EPERM;
1285 goto out;
1286 }
Linux with added FPC-III support