Commit | Line | Data |
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72be35fe JP |
1 | /* |
2 | * drivers/net/bond/bond_options.c - bonding options | |
3 | * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> | |
eecdaa6e | 4 | * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com> |
72be35fe JP |
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> | |
d9e32b21 JP |
16 | #include <linux/netdevice.h> |
17 | #include <linux/rwlock.h> | |
18 | #include <linux/rcupdate.h> | |
09117362 | 19 | #include <linux/ctype.h> |
72be35fe JP |
20 | #include "bonding.h" |
21 | ||
2b3798d5 NA |
22 | static struct bond_opt_value bond_mode_tbl[] = { |
23 | { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT}, | |
24 | { "active-backup", BOND_MODE_ACTIVEBACKUP, 0}, | |
25 | { "balance-xor", BOND_MODE_XOR, 0}, | |
26 | { "broadcast", BOND_MODE_BROADCAST, 0}, | |
27 | { "802.3ad", BOND_MODE_8023AD, 0}, | |
28 | { "balance-tlb", BOND_MODE_TLB, 0}, | |
29 | { "balance-alb", BOND_MODE_ALB, 0}, | |
30 | { NULL, -1, 0}, | |
31 | }; | |
32 | ||
09117362 | 33 | static struct bond_option bond_opts[] = { |
2b3798d5 NA |
34 | [BOND_OPT_MODE] = { |
35 | .id = BOND_OPT_MODE, | |
36 | .name = "mode", | |
37 | .desc = "bond device mode", | |
38 | .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN, | |
39 | .values = bond_mode_tbl, | |
40 | .set = bond_option_mode_set | |
41 | }, | |
09117362 NA |
42 | { } |
43 | }; | |
44 | ||
45 | /* Searches for a value in opt's values[] table */ | |
46 | struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val) | |
47 | { | |
48 | struct bond_option *opt; | |
49 | int i; | |
50 | ||
51 | opt = bond_opt_get(option); | |
52 | if (WARN_ON(!opt)) | |
53 | return NULL; | |
54 | for (i = 0; opt->values && opt->values[i].string; i++) | |
55 | if (opt->values[i].value == val) | |
56 | return &opt->values[i]; | |
57 | ||
58 | return NULL; | |
59 | } | |
60 | ||
61 | /* Searches for a value in opt's values[] table which matches the flagmask */ | |
62 | static struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt, | |
63 | u32 flagmask) | |
64 | { | |
65 | int i; | |
66 | ||
67 | for (i = 0; opt->values && opt->values[i].string; i++) | |
68 | if (opt->values[i].flags & flagmask) | |
69 | return &opt->values[i]; | |
70 | ||
71 | return NULL; | |
72 | } | |
73 | ||
74 | /* If maxval is missing then there's no range to check. In case minval is | |
75 | * missing then it's considered to be 0. | |
76 | */ | |
77 | static bool bond_opt_check_range(const struct bond_option *opt, u64 val) | |
78 | { | |
79 | struct bond_opt_value *minval, *maxval; | |
80 | ||
81 | minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); | |
82 | maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); | |
83 | if (!maxval || (minval && val < minval->value) || val > maxval->value) | |
84 | return false; | |
85 | ||
86 | return true; | |
87 | } | |
88 | ||
89 | /** | |
90 | * bond_opt_parse - parse option value | |
91 | * @opt: the option to parse against | |
92 | * @val: value to parse | |
93 | * | |
94 | * This function tries to extract the value from @val and check if it's | |
95 | * a possible match for the option and returns NULL if a match isn't found, | |
96 | * or the struct_opt_value that matched. It also strips the new line from | |
97 | * @val->string if it's present. | |
98 | */ | |
99 | struct bond_opt_value *bond_opt_parse(const struct bond_option *opt, | |
100 | struct bond_opt_value *val) | |
101 | { | |
102 | char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, }; | |
103 | struct bond_opt_value *tbl, *ret = NULL; | |
104 | bool checkval; | |
105 | int i, rv; | |
106 | ||
107 | /* No parsing if the option wants a raw val */ | |
108 | if (opt->flags & BOND_OPTFLAG_RAWVAL) | |
109 | return val; | |
110 | ||
111 | tbl = opt->values; | |
112 | if (!tbl) | |
113 | goto out; | |
114 | ||
115 | /* ULLONG_MAX is used to bypass string processing */ | |
116 | checkval = val->value != ULLONG_MAX; | |
117 | if (!checkval) { | |
118 | if (!val->string) | |
119 | goto out; | |
120 | p = strchr(val->string, '\n'); | |
121 | if (p) | |
122 | *p = '\0'; | |
123 | for (p = val->string; *p; p++) | |
124 | if (!(isdigit(*p) || isspace(*p))) | |
125 | break; | |
126 | /* The following code extracts the string to match or the value | |
127 | * and sets checkval appropriately | |
128 | */ | |
129 | if (*p) { | |
130 | rv = sscanf(val->string, "%32s", valstr); | |
131 | } else { | |
132 | rv = sscanf(val->string, "%llu", &val->value); | |
133 | checkval = true; | |
134 | } | |
135 | if (!rv) | |
136 | goto out; | |
137 | } | |
138 | ||
139 | for (i = 0; tbl[i].string; i++) { | |
140 | /* Check for exact match */ | |
141 | if (checkval) { | |
142 | if (val->value == tbl[i].value) | |
143 | ret = &tbl[i]; | |
144 | } else { | |
145 | if (!strcmp(valstr, "default") && | |
146 | (tbl[i].flags & BOND_VALFLAG_DEFAULT)) | |
147 | ret = &tbl[i]; | |
148 | ||
149 | if (!strcmp(valstr, tbl[i].string)) | |
150 | ret = &tbl[i]; | |
151 | } | |
152 | /* Found an exact match */ | |
153 | if (ret) | |
154 | goto out; | |
155 | } | |
156 | /* Possible range match */ | |
157 | if (checkval && bond_opt_check_range(opt, val->value)) | |
158 | ret = val; | |
159 | out: | |
160 | return ret; | |
161 | } | |
162 | ||
163 | /* Check opt's dependencies against bond mode and currently set options */ | |
164 | static int bond_opt_check_deps(struct bonding *bond, | |
165 | const struct bond_option *opt) | |
166 | { | |
167 | struct bond_params *params = &bond->params; | |
168 | ||
169 | if (test_bit(params->mode, &opt->unsuppmodes)) | |
170 | return -EACCES; | |
171 | if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond)) | |
172 | return -ENOTEMPTY; | |
173 | if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP)) | |
174 | return -EBUSY; | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | static void bond_opt_dep_print(struct bonding *bond, | |
180 | const struct bond_option *opt) | |
181 | { | |
2b3798d5 | 182 | struct bond_opt_value *modeval; |
09117362 NA |
183 | struct bond_params *params; |
184 | ||
185 | params = &bond->params; | |
2b3798d5 | 186 | modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode); |
09117362 | 187 | if (test_bit(params->mode, &opt->unsuppmodes)) |
2b3798d5 NA |
188 | pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n", |
189 | bond->dev->name, opt->name, | |
190 | modeval->string, modeval->value); | |
09117362 NA |
191 | } |
192 | ||
193 | static void bond_opt_error_interpret(struct bonding *bond, | |
194 | const struct bond_option *opt, | |
195 | int error, struct bond_opt_value *val) | |
196 | { | |
197 | struct bond_opt_value *minval, *maxval; | |
198 | char *p; | |
199 | ||
200 | switch (error) { | |
201 | case -EINVAL: | |
202 | if (val) { | |
203 | if (val->string) { | |
204 | /* sometimes RAWVAL opts may have new lines */ | |
205 | p = strchr(val->string, '\n'); | |
206 | if (p) | |
207 | *p = '\0'; | |
208 | pr_err("%s: option %s: invalid value (%s).\n", | |
209 | bond->dev->name, opt->name, val->string); | |
210 | } else { | |
211 | pr_err("%s: option %s: invalid value (%llu).\n", | |
212 | bond->dev->name, opt->name, val->value); | |
213 | } | |
214 | } | |
215 | minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); | |
216 | maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); | |
217 | if (!maxval) | |
218 | break; | |
219 | pr_err("%s: option %s: allowed values %llu - %llu.\n", | |
220 | bond->dev->name, opt->name, minval ? minval->value : 0, | |
221 | maxval->value); | |
222 | break; | |
223 | case -EACCES: | |
224 | bond_opt_dep_print(bond, opt); | |
225 | break; | |
226 | case -ENOTEMPTY: | |
227 | pr_err("%s: option %s: unable to set because the bond device has slaves.\n", | |
228 | bond->dev->name, opt->name); | |
229 | break; | |
230 | case -EBUSY: | |
231 | pr_err("%s: option %s: unable to set because the bond device is up.\n", | |
232 | bond->dev->name, opt->name); | |
233 | break; | |
234 | default: | |
235 | break; | |
236 | } | |
237 | } | |
238 | ||
239 | /** | |
240 | * __bond_opt_set - set a bonding option | |
241 | * @bond: target bond device | |
242 | * @option: option to set | |
243 | * @val: value to set it to | |
244 | * | |
245 | * This function is used to change the bond's option value, it can be | |
246 | * used for both enabling/changing an option and for disabling it. RTNL lock | |
247 | * must be obtained before calling this function. | |
248 | */ | |
249 | int __bond_opt_set(struct bonding *bond, | |
250 | unsigned int option, struct bond_opt_value *val) | |
251 | { | |
252 | struct bond_opt_value *retval = NULL; | |
253 | const struct bond_option *opt; | |
254 | int ret = -ENOENT; | |
255 | ||
256 | ASSERT_RTNL(); | |
257 | ||
258 | opt = bond_opt_get(option); | |
259 | if (WARN_ON(!val) || WARN_ON(!opt)) | |
260 | goto out; | |
261 | ret = bond_opt_check_deps(bond, opt); | |
262 | if (ret) | |
263 | goto out; | |
264 | retval = bond_opt_parse(opt, val); | |
265 | if (!retval) { | |
266 | ret = -EINVAL; | |
267 | goto out; | |
268 | } | |
269 | ret = opt->set(bond, retval); | |
270 | out: | |
271 | if (ret) | |
272 | bond_opt_error_interpret(bond, opt, ret, val); | |
273 | ||
274 | return ret; | |
275 | } | |
276 | ||
277 | /** | |
278 | * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set | |
279 | * @bond: target bond device | |
280 | * @option: option to set | |
281 | * @buf: value to set it to | |
282 | * | |
283 | * This function tries to acquire RTNL without blocking and if successful | |
284 | * calls __bond_opt_set. It is mainly used for sysfs option manipulation. | |
285 | */ | |
286 | int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf) | |
287 | { | |
288 | struct bond_opt_value optval; | |
289 | int ret; | |
290 | ||
291 | if (!rtnl_trylock()) | |
292 | return restart_syscall(); | |
293 | bond_opt_initstr(&optval, buf); | |
294 | ret = __bond_opt_set(bond, option, &optval); | |
295 | rtnl_unlock(); | |
296 | ||
297 | return ret; | |
298 | } | |
299 | ||
300 | /** | |
301 | * bond_opt_get - get a pointer to an option | |
302 | * @option: option for which to return a pointer | |
303 | * | |
304 | * This function checks if option is valid and if so returns a pointer | |
305 | * to its entry in the bond_opts[] option array. | |
306 | */ | |
307 | struct bond_option *bond_opt_get(unsigned int option) | |
308 | { | |
309 | if (!BOND_OPT_VALID(option)) | |
310 | return NULL; | |
311 | ||
312 | return &bond_opts[option]; | |
313 | } | |
314 | ||
2b3798d5 | 315 | int bond_option_mode_set(struct bonding *bond, struct bond_opt_value *newval) |
72be35fe | 316 | { |
2b3798d5 | 317 | if (BOND_NO_USES_ARP(newval->value) && bond->params.arp_interval) { |
fe9d04af | 318 | pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n", |
2b3798d5 | 319 | bond->dev->name, newval->string); |
fe9d04af | 320 | /* disable arp monitoring */ |
321 | bond->params.arp_interval = 0; | |
322 | /* set miimon to default value */ | |
323 | bond->params.miimon = BOND_DEFAULT_MIIMON; | |
324 | pr_info("%s: Setting MII monitoring interval to %d.\n", | |
325 | bond->dev->name, bond->params.miimon); | |
72be35fe JP |
326 | } |
327 | ||
328 | /* don't cache arp_validate between modes */ | |
329 | bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; | |
2b3798d5 NA |
330 | bond->params.mode = newval->value; |
331 | ||
72be35fe JP |
332 | return 0; |
333 | } | |
d9e32b21 | 334 | |
752d48b5 JP |
335 | static struct net_device *__bond_option_active_slave_get(struct bonding *bond, |
336 | struct slave *slave) | |
337 | { | |
338 | return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL; | |
339 | } | |
340 | ||
341 | struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) | |
342 | { | |
343 | struct slave *slave = rcu_dereference(bond->curr_active_slave); | |
344 | ||
345 | return __bond_option_active_slave_get(bond, slave); | |
346 | } | |
347 | ||
348 | struct net_device *bond_option_active_slave_get(struct bonding *bond) | |
349 | { | |
350 | return __bond_option_active_slave_get(bond, bond->curr_active_slave); | |
351 | } | |
352 | ||
d9e32b21 JP |
353 | int bond_option_active_slave_set(struct bonding *bond, |
354 | struct net_device *slave_dev) | |
355 | { | |
356 | int ret = 0; | |
357 | ||
358 | if (slave_dev) { | |
359 | if (!netif_is_bond_slave(slave_dev)) { | |
360 | pr_err("Device %s is not bonding slave.\n", | |
361 | slave_dev->name); | |
362 | return -EINVAL; | |
363 | } | |
364 | ||
365 | if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { | |
366 | pr_err("%s: Device %s is not our slave.\n", | |
367 | bond->dev->name, slave_dev->name); | |
368 | return -EINVAL; | |
369 | } | |
370 | } | |
371 | ||
372 | if (!USES_PRIMARY(bond->params.mode)) { | |
373 | pr_err("%s: Unable to change active slave; %s is in mode %d\n", | |
374 | bond->dev->name, bond->dev->name, bond->params.mode); | |
375 | return -EINVAL; | |
376 | } | |
377 | ||
378 | block_netpoll_tx(); | |
d9e32b21 JP |
379 | write_lock_bh(&bond->curr_slave_lock); |
380 | ||
381 | /* check to see if we are clearing active */ | |
382 | if (!slave_dev) { | |
383 | pr_info("%s: Clearing current active slave.\n", | |
384 | bond->dev->name); | |
385 | rcu_assign_pointer(bond->curr_active_slave, NULL); | |
386 | bond_select_active_slave(bond); | |
387 | } else { | |
388 | struct slave *old_active = bond->curr_active_slave; | |
389 | struct slave *new_active = bond_slave_get_rtnl(slave_dev); | |
390 | ||
391 | BUG_ON(!new_active); | |
392 | ||
393 | if (new_active == old_active) { | |
394 | /* do nothing */ | |
395 | pr_info("%s: %s is already the current active slave.\n", | |
396 | bond->dev->name, new_active->dev->name); | |
397 | } else { | |
398 | if (old_active && (new_active->link == BOND_LINK_UP) && | |
399 | IS_UP(new_active->dev)) { | |
400 | pr_info("%s: Setting %s as active slave.\n", | |
401 | bond->dev->name, new_active->dev->name); | |
402 | bond_change_active_slave(bond, new_active); | |
403 | } else { | |
404 | pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n", | |
405 | bond->dev->name, new_active->dev->name, | |
406 | new_active->dev->name); | |
407 | ret = -EINVAL; | |
408 | } | |
409 | } | |
410 | } | |
411 | ||
412 | write_unlock_bh(&bond->curr_slave_lock); | |
d9e32b21 JP |
413 | unblock_netpoll_tx(); |
414 | return ret; | |
415 | } | |
eecdaa6e | 416 | |
417 | int bond_option_miimon_set(struct bonding *bond, int miimon) | |
418 | { | |
419 | if (miimon < 0) { | |
420 | pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n", | |
421 | bond->dev->name, miimon, 0, INT_MAX); | |
422 | return -EINVAL; | |
423 | } | |
424 | pr_info("%s: Setting MII monitoring interval to %d.\n", | |
425 | bond->dev->name, miimon); | |
426 | bond->params.miimon = miimon; | |
427 | if (bond->params.updelay) | |
428 | pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n", | |
429 | bond->dev->name, | |
430 | bond->params.updelay * bond->params.miimon); | |
431 | if (bond->params.downdelay) | |
432 | pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n", | |
433 | bond->dev->name, | |
434 | bond->params.downdelay * bond->params.miimon); | |
435 | if (miimon && bond->params.arp_interval) { | |
436 | pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n", | |
437 | bond->dev->name); | |
438 | bond->params.arp_interval = 0; | |
439 | if (bond->params.arp_validate) | |
440 | bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; | |
441 | } | |
442 | if (bond->dev->flags & IFF_UP) { | |
443 | /* If the interface is up, we may need to fire off | |
444 | * the MII timer. If the interface is down, the | |
445 | * timer will get fired off when the open function | |
446 | * is called. | |
447 | */ | |
448 | if (!miimon) { | |
449 | cancel_delayed_work_sync(&bond->mii_work); | |
450 | } else { | |
451 | cancel_delayed_work_sync(&bond->arp_work); | |
452 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
453 | } | |
454 | } | |
455 | return 0; | |
456 | } | |
25852e29 | 457 | |
458 | int bond_option_updelay_set(struct bonding *bond, int updelay) | |
459 | { | |
460 | if (!(bond->params.miimon)) { | |
461 | pr_err("%s: Unable to set up delay as MII monitoring is disabled\n", | |
462 | bond->dev->name); | |
463 | return -EPERM; | |
464 | } | |
465 | ||
466 | if (updelay < 0) { | |
467 | pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n", | |
468 | bond->dev->name, updelay, 0, INT_MAX); | |
469 | return -EINVAL; | |
470 | } else { | |
471 | if ((updelay % bond->params.miimon) != 0) { | |
472 | pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", | |
473 | bond->dev->name, updelay, | |
474 | bond->params.miimon, | |
475 | (updelay / bond->params.miimon) * | |
476 | bond->params.miimon); | |
477 | } | |
478 | bond->params.updelay = updelay / bond->params.miimon; | |
479 | pr_info("%s: Setting up delay to %d.\n", | |
480 | bond->dev->name, | |
481 | bond->params.updelay * bond->params.miimon); | |
482 | } | |
483 | ||
484 | return 0; | |
485 | } | |
c7461f9b | 486 | |
487 | int bond_option_downdelay_set(struct bonding *bond, int downdelay) | |
488 | { | |
489 | if (!(bond->params.miimon)) { | |
490 | pr_err("%s: Unable to set down delay as MII monitoring is disabled\n", | |
491 | bond->dev->name); | |
492 | return -EPERM; | |
493 | } | |
494 | ||
495 | if (downdelay < 0) { | |
496 | pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n", | |
497 | bond->dev->name, downdelay, 0, INT_MAX); | |
498 | return -EINVAL; | |
499 | } else { | |
500 | if ((downdelay % bond->params.miimon) != 0) { | |
501 | pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n", | |
502 | bond->dev->name, downdelay, | |
503 | bond->params.miimon, | |
504 | (downdelay / bond->params.miimon) * | |
505 | bond->params.miimon); | |
506 | } | |
507 | bond->params.downdelay = downdelay / bond->params.miimon; | |
508 | pr_info("%s: Setting down delay to %d.\n", | |
509 | bond->dev->name, | |
510 | bond->params.downdelay * bond->params.miimon); | |
511 | } | |
512 | ||
513 | return 0; | |
514 | } | |
9f53e14e | 515 | |
516 | int bond_option_use_carrier_set(struct bonding *bond, int use_carrier) | |
517 | { | |
518 | if ((use_carrier == 0) || (use_carrier == 1)) { | |
519 | bond->params.use_carrier = use_carrier; | |
520 | pr_info("%s: Setting use_carrier to %d.\n", | |
521 | bond->dev->name, use_carrier); | |
522 | } else { | |
523 | pr_info("%s: Ignoring invalid use_carrier value %d.\n", | |
524 | bond->dev->name, use_carrier); | |
525 | } | |
526 | ||
527 | return 0; | |
528 | } | |
06151dbc | 529 | |
530 | int bond_option_arp_interval_set(struct bonding *bond, int arp_interval) | |
531 | { | |
532 | if (arp_interval < 0) { | |
533 | pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n", | |
534 | bond->dev->name, arp_interval, INT_MAX); | |
535 | return -EINVAL; | |
536 | } | |
537 | if (BOND_NO_USES_ARP(bond->params.mode)) { | |
538 | pr_info("%s: ARP monitoring cannot be used with ALB/TLB/802.3ad. Only MII monitoring is supported on %s.\n", | |
539 | bond->dev->name, bond->dev->name); | |
540 | return -EINVAL; | |
541 | } | |
542 | pr_info("%s: Setting ARP monitoring interval to %d.\n", | |
543 | bond->dev->name, arp_interval); | |
544 | bond->params.arp_interval = arp_interval; | |
545 | if (arp_interval) { | |
546 | if (bond->params.miimon) { | |
547 | pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n", | |
548 | bond->dev->name, bond->dev->name); | |
549 | bond->params.miimon = 0; | |
550 | } | |
551 | if (!bond->params.arp_targets[0]) | |
552 | pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n", | |
553 | bond->dev->name); | |
554 | } | |
555 | if (bond->dev->flags & IFF_UP) { | |
556 | /* If the interface is up, we may need to fire off | |
557 | * the ARP timer. If the interface is down, the | |
558 | * timer will get fired off when the open function | |
559 | * is called. | |
560 | */ | |
561 | if (!arp_interval) { | |
562 | if (bond->params.arp_validate) | |
563 | bond->recv_probe = NULL; | |
564 | cancel_delayed_work_sync(&bond->arp_work); | |
565 | } else { | |
566 | /* arp_validate can be set only in active-backup mode */ | |
567 | if (bond->params.arp_validate) | |
568 | bond->recv_probe = bond_arp_rcv; | |
569 | cancel_delayed_work_sync(&bond->mii_work); | |
570 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
571 | } | |
572 | } | |
573 | ||
574 | return 0; | |
575 | } | |
7f28fa10 | 576 | |
577 | static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot, | |
578 | __be32 target, | |
579 | unsigned long last_rx) | |
580 | { | |
581 | __be32 *targets = bond->params.arp_targets; | |
582 | struct list_head *iter; | |
583 | struct slave *slave; | |
584 | ||
585 | if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) { | |
586 | bond_for_each_slave(bond, slave, iter) | |
587 | slave->target_last_arp_rx[slot] = last_rx; | |
588 | targets[slot] = target; | |
589 | } | |
590 | } | |
591 | ||
592 | static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) | |
593 | { | |
594 | __be32 *targets = bond->params.arp_targets; | |
595 | int ind; | |
596 | ||
597 | if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) { | |
598 | pr_err("%s: invalid ARP target %pI4 specified for addition\n", | |
599 | bond->dev->name, &target); | |
600 | return -EINVAL; | |
601 | } | |
602 | ||
603 | if (bond_get_targets_ip(targets, target) != -1) { /* dup */ | |
604 | pr_err("%s: ARP target %pI4 is already present\n", | |
605 | bond->dev->name, &target); | |
606 | return -EINVAL; | |
607 | } | |
608 | ||
609 | ind = bond_get_targets_ip(targets, 0); /* first free slot */ | |
610 | if (ind == -1) { | |
611 | pr_err("%s: ARP target table is full!\n", | |
612 | bond->dev->name); | |
613 | return -EINVAL; | |
614 | } | |
615 | ||
616 | pr_info("%s: adding ARP target %pI4.\n", bond->dev->name, &target); | |
617 | ||
618 | _bond_options_arp_ip_target_set(bond, ind, target, jiffies); | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) | |
624 | { | |
625 | int ret; | |
626 | ||
627 | /* not to race with bond_arp_rcv */ | |
628 | write_lock_bh(&bond->lock); | |
629 | ret = _bond_option_arp_ip_target_add(bond, target); | |
630 | write_unlock_bh(&bond->lock); | |
631 | ||
632 | return ret; | |
633 | } | |
634 | ||
635 | int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target) | |
636 | { | |
637 | __be32 *targets = bond->params.arp_targets; | |
638 | struct list_head *iter; | |
639 | struct slave *slave; | |
640 | unsigned long *targets_rx; | |
641 | int ind, i; | |
642 | ||
643 | if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) { | |
644 | pr_err("%s: invalid ARP target %pI4 specified for removal\n", | |
645 | bond->dev->name, &target); | |
646 | return -EINVAL; | |
647 | } | |
648 | ||
649 | ind = bond_get_targets_ip(targets, target); | |
650 | if (ind == -1) { | |
651 | pr_err("%s: unable to remove nonexistent ARP target %pI4.\n", | |
652 | bond->dev->name, &target); | |
653 | return -EINVAL; | |
654 | } | |
655 | ||
656 | if (ind == 0 && !targets[1] && bond->params.arp_interval) | |
657 | pr_warn("%s: removing last arp target with arp_interval on\n", | |
658 | bond->dev->name); | |
659 | ||
660 | pr_info("%s: removing ARP target %pI4.\n", bond->dev->name, | |
661 | &target); | |
662 | ||
663 | /* not to race with bond_arp_rcv */ | |
664 | write_lock_bh(&bond->lock); | |
665 | ||
666 | bond_for_each_slave(bond, slave, iter) { | |
667 | targets_rx = slave->target_last_arp_rx; | |
668 | for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) | |
669 | targets_rx[i] = targets_rx[i+1]; | |
670 | targets_rx[i] = 0; | |
671 | } | |
672 | for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) | |
673 | targets[i] = targets[i+1]; | |
674 | targets[i] = 0; | |
675 | ||
676 | write_unlock_bh(&bond->lock); | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | int bond_option_arp_ip_targets_set(struct bonding *bond, __be32 *targets, | |
682 | int count) | |
683 | { | |
684 | int i, ret = 0; | |
685 | ||
686 | /* not to race with bond_arp_rcv */ | |
687 | write_lock_bh(&bond->lock); | |
688 | ||
689 | /* clear table */ | |
690 | for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) | |
691 | _bond_options_arp_ip_target_set(bond, i, 0, 0); | |
692 | ||
693 | if (count == 0 && bond->params.arp_interval) | |
694 | pr_warn("%s: removing last arp target with arp_interval on\n", | |
695 | bond->dev->name); | |
696 | ||
697 | for (i = 0; i < count; i++) { | |
698 | ret = _bond_option_arp_ip_target_add(bond, targets[i]); | |
699 | if (ret) | |
700 | break; | |
701 | } | |
702 | ||
703 | write_unlock_bh(&bond->lock); | |
704 | return ret; | |
705 | } | |
29c49482 | 706 | |
707 | int bond_option_arp_validate_set(struct bonding *bond, int arp_validate) | |
708 | { | |
3243c47b | 709 | if (bond_parm_tbl_lookup(arp_validate, arp_validate_tbl) < 0) { |
710 | pr_err("%s: Ignoring invalid arp_validate value %d.\n", | |
711 | bond->dev->name, arp_validate); | |
712 | return -EINVAL; | |
713 | } | |
714 | ||
29c49482 | 715 | if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { |
716 | pr_err("%s: arp_validate only supported in active-backup mode.\n", | |
717 | bond->dev->name); | |
718 | return -EINVAL; | |
719 | } | |
3243c47b | 720 | |
29c49482 | 721 | pr_info("%s: setting arp_validate to %s (%d).\n", |
722 | bond->dev->name, arp_validate_tbl[arp_validate].modename, | |
723 | arp_validate); | |
724 | ||
725 | if (bond->dev->flags & IFF_UP) { | |
726 | if (!arp_validate) | |
727 | bond->recv_probe = NULL; | |
728 | else if (bond->params.arp_interval) | |
729 | bond->recv_probe = bond_arp_rcv; | |
730 | } | |
731 | bond->params.arp_validate = arp_validate; | |
732 | ||
733 | return 0; | |
734 | } | |
d5c84254 | 735 | |
736 | int bond_option_arp_all_targets_set(struct bonding *bond, int arp_all_targets) | |
737 | { | |
3243c47b | 738 | if (bond_parm_tbl_lookup(arp_all_targets, arp_all_targets_tbl) < 0) { |
739 | pr_err("%s: Ignoring invalid arp_all_targets value %d.\n", | |
740 | bond->dev->name, arp_all_targets); | |
741 | return -EINVAL; | |
742 | } | |
743 | ||
d5c84254 | 744 | pr_info("%s: setting arp_all_targets to %s (%d).\n", |
745 | bond->dev->name, arp_all_targets_tbl[arp_all_targets].modename, | |
746 | arp_all_targets); | |
747 | ||
748 | bond->params.arp_all_targets = arp_all_targets; | |
749 | ||
750 | return 0; | |
751 | } | |
0a98a0d1 | 752 | |
753 | int bond_option_primary_set(struct bonding *bond, const char *primary) | |
754 | { | |
755 | struct list_head *iter; | |
756 | struct slave *slave; | |
757 | int err = 0; | |
758 | ||
759 | block_netpoll_tx(); | |
760 | read_lock(&bond->lock); | |
761 | write_lock_bh(&bond->curr_slave_lock); | |
762 | ||
763 | if (!USES_PRIMARY(bond->params.mode)) { | |
764 | pr_err("%s: Unable to set primary slave; %s is in mode %d\n", | |
765 | bond->dev->name, bond->dev->name, bond->params.mode); | |
766 | err = -EINVAL; | |
767 | goto out; | |
768 | } | |
769 | ||
770 | /* check to see if we are clearing primary */ | |
771 | if (!strlen(primary)) { | |
772 | pr_info("%s: Setting primary slave to None.\n", | |
773 | bond->dev->name); | |
774 | bond->primary_slave = NULL; | |
775 | memset(bond->params.primary, 0, sizeof(bond->params.primary)); | |
776 | bond_select_active_slave(bond); | |
777 | goto out; | |
778 | } | |
779 | ||
780 | bond_for_each_slave(bond, slave, iter) { | |
781 | if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { | |
782 | pr_info("%s: Setting %s as primary slave.\n", | |
783 | bond->dev->name, slave->dev->name); | |
784 | bond->primary_slave = slave; | |
785 | strcpy(bond->params.primary, slave->dev->name); | |
786 | bond_select_active_slave(bond); | |
787 | goto out; | |
788 | } | |
789 | } | |
790 | ||
791 | strncpy(bond->params.primary, primary, IFNAMSIZ); | |
792 | bond->params.primary[IFNAMSIZ - 1] = 0; | |
793 | ||
794 | pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet.\n", | |
795 | bond->dev->name, primary, bond->dev->name); | |
796 | ||
797 | out: | |
798 | write_unlock_bh(&bond->curr_slave_lock); | |
799 | read_unlock(&bond->lock); | |
800 | unblock_netpoll_tx(); | |
801 | ||
802 | return err; | |
803 | } | |
8a41ae44 | 804 | |
805 | int bond_option_primary_reselect_set(struct bonding *bond, int primary_reselect) | |
806 | { | |
3243c47b | 807 | if (bond_parm_tbl_lookup(primary_reselect, pri_reselect_tbl) < 0) { |
808 | pr_err("%s: Ignoring invalid primary_reselect value %d.\n", | |
809 | bond->dev->name, primary_reselect); | |
810 | return -EINVAL; | |
811 | } | |
812 | ||
8a41ae44 | 813 | bond->params.primary_reselect = primary_reselect; |
814 | pr_info("%s: setting primary_reselect to %s (%d).\n", | |
815 | bond->dev->name, pri_reselect_tbl[primary_reselect].modename, | |
816 | primary_reselect); | |
817 | ||
818 | block_netpoll_tx(); | |
819 | write_lock_bh(&bond->curr_slave_lock); | |
820 | bond_select_active_slave(bond); | |
821 | write_unlock_bh(&bond->curr_slave_lock); | |
822 | unblock_netpoll_tx(); | |
823 | ||
824 | return 0; | |
825 | } | |
89901972 | 826 | |
827 | int bond_option_fail_over_mac_set(struct bonding *bond, int fail_over_mac) | |
828 | { | |
3243c47b | 829 | if (bond_parm_tbl_lookup(fail_over_mac, fail_over_mac_tbl) < 0) { |
830 | pr_err("%s: Ignoring invalid fail_over_mac value %d.\n", | |
831 | bond->dev->name, fail_over_mac); | |
832 | return -EINVAL; | |
833 | } | |
834 | ||
89901972 | 835 | if (bond_has_slaves(bond)) { |
836 | pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n", | |
837 | bond->dev->name); | |
838 | return -EPERM; | |
839 | } | |
840 | ||
841 | bond->params.fail_over_mac = fail_over_mac; | |
842 | pr_info("%s: Setting fail_over_mac to %s (%d).\n", | |
843 | bond->dev->name, fail_over_mac_tbl[fail_over_mac].modename, | |
844 | fail_over_mac); | |
845 | ||
846 | return 0; | |
847 | } | |
f70161c6 | 848 | |
849 | int bond_option_xmit_hash_policy_set(struct bonding *bond, int xmit_hash_policy) | |
850 | { | |
3243c47b | 851 | if (bond_parm_tbl_lookup(xmit_hash_policy, xmit_hashtype_tbl) < 0) { |
852 | pr_err("%s: Ignoring invalid xmit_hash_policy value %d.\n", | |
853 | bond->dev->name, xmit_hash_policy); | |
854 | return -EINVAL; | |
855 | } | |
856 | ||
f70161c6 | 857 | bond->params.xmit_policy = xmit_hash_policy; |
858 | pr_info("%s: setting xmit hash policy to %s (%d).\n", | |
859 | bond->dev->name, | |
860 | xmit_hashtype_tbl[xmit_hash_policy].modename, xmit_hash_policy); | |
861 | ||
862 | return 0; | |
863 | } | |
d8838de7 | 864 | |
865 | int bond_option_resend_igmp_set(struct bonding *bond, int resend_igmp) | |
866 | { | |
867 | if (resend_igmp < 0 || resend_igmp > 255) { | |
868 | pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n", | |
869 | bond->dev->name, resend_igmp); | |
870 | return -EINVAL; | |
871 | } | |
872 | ||
873 | bond->params.resend_igmp = resend_igmp; | |
874 | pr_info("%s: Setting resend_igmp to %d.\n", | |
875 | bond->dev->name, resend_igmp); | |
876 | ||
877 | return 0; | |
878 | } | |
2c9839c1 | 879 | |
880 | int bond_option_num_peer_notif_set(struct bonding *bond, int num_peer_notif) | |
881 | { | |
882 | bond->params.num_peer_notif = num_peer_notif; | |
883 | return 0; | |
884 | } | |
1cc0b1e3 | 885 | |
886 | int bond_option_all_slaves_active_set(struct bonding *bond, | |
887 | int all_slaves_active) | |
888 | { | |
889 | struct list_head *iter; | |
890 | struct slave *slave; | |
891 | ||
892 | if (all_slaves_active == bond->params.all_slaves_active) | |
893 | return 0; | |
894 | ||
895 | if ((all_slaves_active == 0) || (all_slaves_active == 1)) { | |
896 | bond->params.all_slaves_active = all_slaves_active; | |
897 | } else { | |
898 | pr_info("%s: Ignoring invalid all_slaves_active value %d.\n", | |
899 | bond->dev->name, all_slaves_active); | |
900 | return -EINVAL; | |
901 | } | |
902 | ||
903 | bond_for_each_slave(bond, slave, iter) { | |
904 | if (!bond_is_active_slave(slave)) { | |
905 | if (all_slaves_active) | |
906 | slave->inactive = 0; | |
907 | else | |
908 | slave->inactive = 1; | |
909 | } | |
910 | } | |
911 | ||
912 | return 0; | |
913 | } | |
7d101008 | 914 | |
915 | int bond_option_min_links_set(struct bonding *bond, int min_links) | |
916 | { | |
917 | pr_info("%s: Setting min links value to %u\n", | |
918 | bond->dev->name, min_links); | |
919 | bond->params.min_links = min_links; | |
920 | ||
921 | return 0; | |
922 | } | |
8d836d09 | 923 | |
924 | int bond_option_lp_interval_set(struct bonding *bond, int lp_interval) | |
925 | { | |
926 | if (lp_interval <= 0) { | |
927 | pr_err("%s: lp_interval must be between 1 and %d\n", | |
928 | bond->dev->name, INT_MAX); | |
929 | return -EINVAL; | |
930 | } | |
931 | ||
932 | bond->params.lp_interval = lp_interval; | |
933 | ||
934 | return 0; | |
935 | } | |
c13ab3ff | 936 | |
937 | int bond_option_packets_per_slave_set(struct bonding *bond, | |
938 | int packets_per_slave) | |
939 | { | |
940 | if (packets_per_slave < 0 || packets_per_slave > USHRT_MAX) { | |
941 | pr_err("%s: packets_per_slave must be between 0 and %u\n", | |
942 | bond->dev->name, USHRT_MAX); | |
943 | return -EINVAL; | |
944 | } | |
945 | ||
946 | if (bond->params.mode != BOND_MODE_ROUNDROBIN) | |
947 | pr_warn("%s: Warning: packets_per_slave has effect only in balance-rr mode\n", | |
948 | bond->dev->name); | |
949 | ||
809fa972 HFS |
950 | bond->params.packets_per_slave = packets_per_slave; |
951 | if (packets_per_slave > 0) { | |
952 | bond->params.reciprocal_packets_per_slave = | |
c13ab3ff | 953 | reciprocal_value(packets_per_slave); |
809fa972 HFS |
954 | } else { |
955 | /* reciprocal_packets_per_slave is unused if | |
956 | * packets_per_slave is 0 or 1, just initialize it | |
957 | */ | |
958 | bond->params.reciprocal_packets_per_slave = | |
959 | (struct reciprocal_value) { 0 }; | |
960 | } | |
c13ab3ff | 961 | |
962 | return 0; | |
963 | } | |
998e40bb | 964 | |
965 | int bond_option_lacp_rate_set(struct bonding *bond, int lacp_rate) | |
966 | { | |
3243c47b | 967 | if (bond_parm_tbl_lookup(lacp_rate, bond_lacp_tbl) < 0) { |
968 | pr_err("%s: Ignoring invalid LACP rate value %d.\n", | |
969 | bond->dev->name, lacp_rate); | |
970 | return -EINVAL; | |
971 | } | |
972 | ||
998e40bb | 973 | if (bond->dev->flags & IFF_UP) { |
974 | pr_err("%s: Unable to update LACP rate because interface is up.\n", | |
975 | bond->dev->name); | |
976 | return -EPERM; | |
977 | } | |
978 | ||
979 | if (bond->params.mode != BOND_MODE_8023AD) { | |
980 | pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n", | |
981 | bond->dev->name); | |
982 | return -EPERM; | |
983 | } | |
984 | ||
3243c47b | 985 | bond->params.lacp_fast = lacp_rate; |
986 | bond_3ad_update_lacp_rate(bond); | |
987 | pr_info("%s: Setting LACP rate to %s (%d).\n", | |
988 | bond->dev->name, bond_lacp_tbl[lacp_rate].modename, | |
989 | lacp_rate); | |
998e40bb | 990 | |
991 | return 0; | |
992 | } | |
ec029fac | 993 | |
994 | int bond_option_ad_select_set(struct bonding *bond, int ad_select) | |
995 | { | |
ec029fac | 996 | if (bond_parm_tbl_lookup(ad_select, ad_select_tbl) < 0) { |
997 | pr_err("%s: Ignoring invalid ad_select value %d.\n", | |
998 | bond->dev->name, ad_select); | |
999 | return -EINVAL; | |
1000 | } | |
1001 | ||
3243c47b | 1002 | if (bond->dev->flags & IFF_UP) { |
1003 | pr_err("%s: Unable to update ad_select because interface is up.\n", | |
1004 | bond->dev->name); | |
1005 | return -EPERM; | |
1006 | } | |
1007 | ||
ec029fac | 1008 | bond->params.ad_select = ad_select; |
1009 | pr_info("%s: Setting ad_select to %s (%d).\n", | |
1010 | bond->dev->name, ad_select_tbl[ad_select].modename, | |
1011 | ad_select); | |
1012 | ||
1013 | return 0; | |
1014 | } |