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Merge tag 'for-linus-20190706' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / net / bonding / bond_options.c
blob9677418e0362c42a389c7b4f667130277dcb50e1
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * drivers/net/bond/bond_options.c - bonding options
4 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
5 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
6 */
7
8 #include <linux/errno.h>
9 #include <linux/if.h>
10 #include <linux/netdevice.h>
11 #include <linux/spinlock.h>
12 #include <linux/rcupdate.h>
13 #include <linux/ctype.h>
14 #include <linux/inet.h>
15 #include <linux/sched/signal.h>
16
17 #include <net/bonding.h>
18
19 static int bond_option_active_slave_set(struct bonding *bond,
20 const struct bond_opt_value *newval);
21 static int bond_option_miimon_set(struct bonding *bond,
22 const struct bond_opt_value *newval);
23 static int bond_option_updelay_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25 static int bond_option_downdelay_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27 static int bond_option_use_carrier_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29 static int bond_option_arp_interval_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
32 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
33 static int bond_option_arp_ip_targets_set(struct bonding *bond,
34 const struct bond_opt_value *newval);
35 static int bond_option_arp_validate_set(struct bonding *bond,
36 const struct bond_opt_value *newval);
37 static int bond_option_arp_all_targets_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39 static int bond_option_primary_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41 static int bond_option_primary_reselect_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43 static int bond_option_fail_over_mac_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47 static int bond_option_resend_igmp_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49 static int bond_option_num_peer_notif_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51 static int bond_option_all_slaves_active_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53 static int bond_option_min_links_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55 static int bond_option_lp_interval_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57 static int bond_option_pps_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59 static int bond_option_lacp_rate_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61 static int bond_option_ad_select_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63 static int bond_option_queue_id_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65 static int bond_option_mode_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67 static int bond_option_slaves_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73 static int bond_option_ad_actor_system_set(struct bonding *bond,
74 const struct bond_opt_value *newval);
75 static int bond_option_ad_user_port_key_set(struct bonding *bond,
76 const struct bond_opt_value *newval);
77
78
79 static const struct bond_opt_value bond_mode_tbl[] = {
80 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
81 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
82 { "balance-xor", BOND_MODE_XOR, 0},
83 { "broadcast", BOND_MODE_BROADCAST, 0},
84 { "802.3ad", BOND_MODE_8023AD, 0},
85 { "balance-tlb", BOND_MODE_TLB, 0},
86 { "balance-alb", BOND_MODE_ALB, 0},
87 { NULL, -1, 0},
88 };
89
90 static const struct bond_opt_value bond_pps_tbl[] = {
91 { "default", 1, BOND_VALFLAG_DEFAULT},
92 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
93 { NULL, -1, 0},
94 };
95
96 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
97 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
98 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
99 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
100 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
101 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
102 { NULL, -1, 0},
103 };
104
105 static const struct bond_opt_value bond_arp_validate_tbl[] = {
106 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
107 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
108 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
109 { "all", BOND_ARP_VALIDATE_ALL, 0},
110 { "filter", BOND_ARP_FILTER, 0},
111 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
112 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
113 { NULL, -1, 0},
114 };
115
116 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
117 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
118 { "all", BOND_ARP_TARGETS_ALL, 0},
119 { NULL, -1, 0},
120 };
121
122 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
123 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
124 { "active", BOND_FOM_ACTIVE, 0},
125 { "follow", BOND_FOM_FOLLOW, 0},
126 { NULL, -1, 0},
127 };
128
129 static const struct bond_opt_value bond_intmax_tbl[] = {
130 { "off", 0, BOND_VALFLAG_DEFAULT},
131 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
132 { NULL, -1, 0}
133 };
134
135 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
136 { "slow", AD_LACP_SLOW, 0},
137 { "fast", AD_LACP_FAST, 0},
138 { NULL, -1, 0},
139 };
140
141 static const struct bond_opt_value bond_ad_select_tbl[] = {
142 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
143 { "bandwidth", BOND_AD_BANDWIDTH, 0},
144 { "count", BOND_AD_COUNT, 0},
145 { NULL, -1, 0},
146 };
147
148 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
149 { "off", 0, 0},
150 { "maxval", 255, BOND_VALFLAG_MAX},
151 { "default", 1, BOND_VALFLAG_DEFAULT},
152 { NULL, -1, 0}
153 };
154
155 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
156 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
157 { "better", BOND_PRI_RESELECT_BETTER, 0},
158 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
159 { NULL, -1},
160 };
161
162 static const struct bond_opt_value bond_use_carrier_tbl[] = {
163 { "off", 0, 0},
164 { "on", 1, BOND_VALFLAG_DEFAULT},
165 { NULL, -1, 0}
166 };
167
168 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
169 { "off", 0, BOND_VALFLAG_DEFAULT},
170 { "on", 1, 0},
171 { NULL, -1, 0}
172 };
173
174 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
175 { "off", 0, 0},
176 { "maxval", 255, BOND_VALFLAG_MAX},
177 { "default", 1, BOND_VALFLAG_DEFAULT},
178 { NULL, -1, 0}
179 };
180
181 static const struct bond_opt_value bond_lp_interval_tbl[] = {
182 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
183 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
184 { NULL, -1, 0},
185 };
186
187 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
188 { "off", 0, 0},
189 { "on", 1, BOND_VALFLAG_DEFAULT},
190 { NULL, -1, 0}
191 };
192
193 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
194 { "minval", 1, BOND_VALFLAG_MIN},
195 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
196 { NULL, -1, 0},
197 };
198
199 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
200 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
201 { "maxval", 1023, BOND_VALFLAG_MAX},
202 { NULL, -1, 0},
203 };
204
205 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
206 [BOND_OPT_MODE] = {
207 .id = BOND_OPT_MODE,
208 .name = "mode",
209 .desc = "bond device mode",
210 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
211 .values = bond_mode_tbl,
212 .set = bond_option_mode_set
213 },
214 [BOND_OPT_PACKETS_PER_SLAVE] = {
215 .id = BOND_OPT_PACKETS_PER_SLAVE,
216 .name = "packets_per_slave",
217 .desc = "Packets to send per slave in RR mode",
218 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
219 .values = bond_pps_tbl,
220 .set = bond_option_pps_set
221 },
222 [BOND_OPT_XMIT_HASH] = {
223 .id = BOND_OPT_XMIT_HASH,
224 .name = "xmit_hash_policy",
225 .desc = "balance-xor, 802.3ad, and tlb hashing method",
226 .values = bond_xmit_hashtype_tbl,
227 .set = bond_option_xmit_hash_policy_set
228 },
229 [BOND_OPT_ARP_VALIDATE] = {
230 .id = BOND_OPT_ARP_VALIDATE,
231 .name = "arp_validate",
232 .desc = "validate src/dst of ARP probes",
233 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
234 BIT(BOND_MODE_ALB),
235 .values = bond_arp_validate_tbl,
236 .set = bond_option_arp_validate_set
237 },
238 [BOND_OPT_ARP_ALL_TARGETS] = {
239 .id = BOND_OPT_ARP_ALL_TARGETS,
240 .name = "arp_all_targets",
241 .desc = "fail on any/all arp targets timeout",
242 .values = bond_arp_all_targets_tbl,
243 .set = bond_option_arp_all_targets_set
244 },
245 [BOND_OPT_FAIL_OVER_MAC] = {
246 .id = BOND_OPT_FAIL_OVER_MAC,
247 .name = "fail_over_mac",
248 .desc = "For active-backup, do not set all slaves to the same MAC",
249 .flags = BOND_OPTFLAG_NOSLAVES,
250 .values = bond_fail_over_mac_tbl,
251 .set = bond_option_fail_over_mac_set
252 },
253 [BOND_OPT_ARP_INTERVAL] = {
254 .id = BOND_OPT_ARP_INTERVAL,
255 .name = "arp_interval",
256 .desc = "arp interval in milliseconds",
257 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
258 BIT(BOND_MODE_ALB),
259 .values = bond_intmax_tbl,
260 .set = bond_option_arp_interval_set
261 },
262 [BOND_OPT_ARP_TARGETS] = {
263 .id = BOND_OPT_ARP_TARGETS,
264 .name = "arp_ip_target",
265 .desc = "arp targets in n.n.n.n form",
266 .flags = BOND_OPTFLAG_RAWVAL,
267 .set = bond_option_arp_ip_targets_set
268 },
269 [BOND_OPT_DOWNDELAY] = {
270 .id = BOND_OPT_DOWNDELAY,
271 .name = "downdelay",
272 .desc = "Delay before considering link down, in milliseconds",
273 .values = bond_intmax_tbl,
274 .set = bond_option_downdelay_set
275 },
276 [BOND_OPT_UPDELAY] = {
277 .id = BOND_OPT_UPDELAY,
278 .name = "updelay",
279 .desc = "Delay before considering link up, in milliseconds",
280 .values = bond_intmax_tbl,
281 .set = bond_option_updelay_set
282 },
283 [BOND_OPT_LACP_RATE] = {
284 .id = BOND_OPT_LACP_RATE,
285 .name = "lacp_rate",
286 .desc = "LACPDU tx rate to request from 802.3ad partner",
287 .flags = BOND_OPTFLAG_IFDOWN,
288 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
289 .values = bond_lacp_rate_tbl,
290 .set = bond_option_lacp_rate_set
291 },
292 [BOND_OPT_MINLINKS] = {
293 .id = BOND_OPT_MINLINKS,
294 .name = "min_links",
295 .desc = "Minimum number of available links before turning on carrier",
296 .values = bond_intmax_tbl,
297 .set = bond_option_min_links_set
298 },
299 [BOND_OPT_AD_SELECT] = {
300 .id = BOND_OPT_AD_SELECT,
301 .name = "ad_select",
302 .desc = "803.ad aggregation selection logic",
303 .flags = BOND_OPTFLAG_IFDOWN,
304 .values = bond_ad_select_tbl,
305 .set = bond_option_ad_select_set
306 },
307 [BOND_OPT_NUM_PEER_NOTIF] = {
308 .id = BOND_OPT_NUM_PEER_NOTIF,
309 .name = "num_unsol_na",
310 .desc = "Number of peer notifications to send on failover event",
311 .values = bond_num_peer_notif_tbl,
312 .set = bond_option_num_peer_notif_set
313 },
314 [BOND_OPT_MIIMON] = {
315 .id = BOND_OPT_MIIMON,
316 .name = "miimon",
317 .desc = "Link check interval in milliseconds",
318 .values = bond_intmax_tbl,
319 .set = bond_option_miimon_set
320 },
321 [BOND_OPT_PRIMARY] = {
322 .id = BOND_OPT_PRIMARY,
323 .name = "primary",
324 .desc = "Primary network device to use",
325 .flags = BOND_OPTFLAG_RAWVAL,
326 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
327 BIT(BOND_MODE_TLB) |
328 BIT(BOND_MODE_ALB)),
329 .set = bond_option_primary_set
330 },
331 [BOND_OPT_PRIMARY_RESELECT] = {
332 .id = BOND_OPT_PRIMARY_RESELECT,
333 .name = "primary_reselect",
334 .desc = "Reselect primary slave once it comes up",
335 .values = bond_primary_reselect_tbl,
336 .set = bond_option_primary_reselect_set
337 },
338 [BOND_OPT_USE_CARRIER] = {
339 .id = BOND_OPT_USE_CARRIER,
340 .name = "use_carrier",
341 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
342 .values = bond_use_carrier_tbl,
343 .set = bond_option_use_carrier_set
344 },
345 [BOND_OPT_ACTIVE_SLAVE] = {
346 .id = BOND_OPT_ACTIVE_SLAVE,
347 .name = "active_slave",
348 .desc = "Currently active slave",
349 .flags = BOND_OPTFLAG_RAWVAL,
350 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
351 BIT(BOND_MODE_TLB) |
352 BIT(BOND_MODE_ALB)),
353 .set = bond_option_active_slave_set
354 },
355 [BOND_OPT_QUEUE_ID] = {
356 .id = BOND_OPT_QUEUE_ID,
357 .name = "queue_id",
358 .desc = "Set queue id of a slave",
359 .flags = BOND_OPTFLAG_RAWVAL,
360 .set = bond_option_queue_id_set
361 },
362 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
363 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
364 .name = "all_slaves_active",
365 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
366 .values = bond_all_slaves_active_tbl,
367 .set = bond_option_all_slaves_active_set
368 },
369 [BOND_OPT_RESEND_IGMP] = {
370 .id = BOND_OPT_RESEND_IGMP,
371 .name = "resend_igmp",
372 .desc = "Number of IGMP membership reports to send on link failure",
373 .values = bond_resend_igmp_tbl,
374 .set = bond_option_resend_igmp_set
375 },
376 [BOND_OPT_LP_INTERVAL] = {
377 .id = BOND_OPT_LP_INTERVAL,
378 .name = "lp_interval",
379 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
380 .values = bond_lp_interval_tbl,
381 .set = bond_option_lp_interval_set
382 },
383 [BOND_OPT_SLAVES] = {
384 .id = BOND_OPT_SLAVES,
385 .name = "slaves",
386 .desc = "Slave membership management",
387 .flags = BOND_OPTFLAG_RAWVAL,
388 .set = bond_option_slaves_set
389 },
390 [BOND_OPT_TLB_DYNAMIC_LB] = {
391 .id = BOND_OPT_TLB_DYNAMIC_LB,
392 .name = "tlb_dynamic_lb",
393 .desc = "Enable dynamic flow shuffling",
394 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
395 .values = bond_tlb_dynamic_lb_tbl,
396 .flags = BOND_OPTFLAG_IFDOWN,
397 .set = bond_option_tlb_dynamic_lb_set,
398 },
399 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
400 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
401 .name = "ad_actor_sys_prio",
402 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
403 .values = bond_ad_actor_sys_prio_tbl,
404 .set = bond_option_ad_actor_sys_prio_set,
405 },
406 [BOND_OPT_AD_ACTOR_SYSTEM] = {
407 .id = BOND_OPT_AD_ACTOR_SYSTEM,
408 .name = "ad_actor_system",
409 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
410 .flags = BOND_OPTFLAG_RAWVAL,
411 .set = bond_option_ad_actor_system_set,
412 },
413 [BOND_OPT_AD_USER_PORT_KEY] = {
414 .id = BOND_OPT_AD_USER_PORT_KEY,
415 .name = "ad_user_port_key",
416 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
417 .flags = BOND_OPTFLAG_IFDOWN,
418 .values = bond_ad_user_port_key_tbl,
419 .set = bond_option_ad_user_port_key_set,
420 },
421 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
422 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
423 .name = "num_grat_arp",
424 .desc = "Number of peer notifications to send on failover event",
425 .values = bond_num_peer_notif_tbl,
426 .set = bond_option_num_peer_notif_set
427 }
428 };
429
430 /* Searches for an option by name */
431 const struct bond_option *bond_opt_get_by_name(const char *name)
432 {
433 const struct bond_option *opt;
434 int option;
435
436 for (option = 0; option < BOND_OPT_LAST; option++) {
437 opt = bond_opt_get(option);
438 if (opt && !strcmp(opt->name, name))
439 return opt;
440 }
441
442 return NULL;
443 }
444
445 /* Searches for a value in opt's values[] table */
446 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
447 {
448 const struct bond_option *opt;
449 int i;
450
451 opt = bond_opt_get(option);
452 if (WARN_ON(!opt))
453 return NULL;
454 for (i = 0; opt->values && opt->values[i].string; i++)
455 if (opt->values[i].value == val)
456 return &opt->values[i];
457
458 return NULL;
459 }
460
461 /* Searches for a value in opt's values[] table which matches the flagmask */
462 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
463 u32 flagmask)
464 {
465 int i;
466
467 for (i = 0; opt->values && opt->values[i].string; i++)
468 if (opt->values[i].flags & flagmask)
469 return &opt->values[i];
470
471 return NULL;
472 }
473
474 /* If maxval is missing then there's no range to check. In case minval is
475 * missing then it's considered to be 0.
476 */
477 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
478 {
479 const struct bond_opt_value *minval, *maxval;
480
481 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
482 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
483 if (!maxval || (minval && val < minval->value) || val > maxval->value)
484 return false;
485
486 return true;
487 }
488
489 /**
490 * bond_opt_parse - parse option value
491 * @opt: the option to parse against
492 * @val: value to parse
493 *
494 * This function tries to extract the value from @val and check if it's
495 * a possible match for the option and returns NULL if a match isn't found,
496 * or the struct_opt_value that matched. It also strips the new line from
497 * @val->string if it's present.
498 */
499 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
500 struct bond_opt_value *val)
501 {
502 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
503 const struct bond_opt_value *tbl;
504 const struct bond_opt_value *ret = NULL;
505 bool checkval;
506 int i, rv;
507
508 /* No parsing if the option wants a raw val */
509 if (opt->flags & BOND_OPTFLAG_RAWVAL)
510 return val;
511
512 tbl = opt->values;
513 if (!tbl)
514 goto out;
515
516 /* ULLONG_MAX is used to bypass string processing */
517 checkval = val->value != ULLONG_MAX;
518 if (!checkval) {
519 if (!val->string)
520 goto out;
521 p = strchr(val->string, '\n');
522 if (p)
523 *p = '\0';
524 for (p = val->string; *p; p++)
525 if (!(isdigit(*p) || isspace(*p)))
526 break;
527 /* The following code extracts the string to match or the value
528 * and sets checkval appropriately
529 */
530 if (*p) {
531 rv = sscanf(val->string, "%32s", valstr);
532 } else {
533 rv = sscanf(val->string, "%llu", &val->value);
534 checkval = true;
535 }
536 if (!rv)
537 goto out;
538 }
539
540 for (i = 0; tbl[i].string; i++) {
541 /* Check for exact match */
542 if (checkval) {
543 if (val->value == tbl[i].value)
544 ret = &tbl[i];
545 } else {
546 if (!strcmp(valstr, "default") &&
547 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
548 ret = &tbl[i];
549
550 if (!strcmp(valstr, tbl[i].string))
551 ret = &tbl[i];
552 }
553 /* Found an exact match */
554 if (ret)
555 goto out;
556 }
557 /* Possible range match */
558 if (checkval && bond_opt_check_range(opt, val->value))
559 ret = val;
560 out:
561 return ret;
562 }
563
564 /* Check opt's dependencies against bond mode and currently set options */
565 static int bond_opt_check_deps(struct bonding *bond,
566 const struct bond_option *opt)
567 {
568 struct bond_params *params = &bond->params;
569
570 if (test_bit(params->mode, &opt->unsuppmodes))
571 return -EACCES;
572 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
573 return -ENOTEMPTY;
574 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
575 return -EBUSY;
576
577 return 0;
578 }
579
580 static void bond_opt_dep_print(struct bonding *bond,
581 const struct bond_option *opt)
582 {
583 const struct bond_opt_value *modeval;
584 struct bond_params *params;
585
586 params = &bond->params;
587 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
588 if (test_bit(params->mode, &opt->unsuppmodes))
589 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
590 opt->name, modeval->string, modeval->value);
591 }
592
593 static void bond_opt_error_interpret(struct bonding *bond,
594 const struct bond_option *opt,
595 int error, const struct bond_opt_value *val)
596 {
597 const struct bond_opt_value *minval, *maxval;
598 char *p;
599
600 switch (error) {
601 case -EINVAL:
602 if (val) {
603 if (val->string) {
604 /* sometimes RAWVAL opts may have new lines */
605 p = strchr(val->string, '\n');
606 if (p)
607 *p = '\0';
608 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
609 opt->name, val->string);
610 } else {
611 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
612 opt->name, val->value);
613 }
614 }
615 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
616 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
617 if (!maxval)
618 break;
619 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
620 opt->name, minval ? minval->value : 0, maxval->value);
621 break;
622 case -EACCES:
623 bond_opt_dep_print(bond, opt);
624 break;
625 case -ENOTEMPTY:
626 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
627 opt->name);
628 break;
629 case -EBUSY:
630 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
631 opt->name);
632 break;
633 default:
634 break;
635 }
636 }
637
638 /**
639 * __bond_opt_set - set a bonding option
640 * @bond: target bond device
641 * @option: option to set
642 * @val: value to set it to
643 *
644 * This function is used to change the bond's option value, it can be
645 * used for both enabling/changing an option and for disabling it. RTNL lock
646 * must be obtained before calling this function.
647 */
648 int __bond_opt_set(struct bonding *bond,
649 unsigned int option, struct bond_opt_value *val)
650 {
651 const struct bond_opt_value *retval = NULL;
652 const struct bond_option *opt;
653 int ret = -ENOENT;
654
655 ASSERT_RTNL();
656
657 opt = bond_opt_get(option);
658 if (WARN_ON(!val) || WARN_ON(!opt))
659 goto out;
660 ret = bond_opt_check_deps(bond, opt);
661 if (ret)
662 goto out;
663 retval = bond_opt_parse(opt, val);
664 if (!retval) {
665 ret = -EINVAL;
666 goto out;
667 }
668 ret = opt->set(bond, retval);
669 out:
670 if (ret)
671 bond_opt_error_interpret(bond, opt, ret, val);
672
673 return ret;
674 }
675 /**
676 * __bond_opt_set_notify - set a bonding option
677 * @bond: target bond device
678 * @option: option to set
679 * @val: value to set it to
680 *
681 * This function is used to change the bond's option value and trigger
682 * a notification to user sapce. It can be used for both enabling/changing
683 * an option and for disabling it. RTNL lock must be obtained before calling
684 * this function.
685 */
686 int __bond_opt_set_notify(struct bonding *bond,
687 unsigned int option, struct bond_opt_value *val)
688 {
689 int ret = -ENOENT;
690
691 ASSERT_RTNL();
692
693 ret = __bond_opt_set(bond, option, val);
694
695 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
696 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
697
698 return ret;
699 }
700
701 /**
702 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
703 * @bond: target bond device
704 * @option: option to set
705 * @buf: value to set it to
706 *
707 * This function tries to acquire RTNL without blocking and if successful
708 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
709 */
710 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
711 {
712 struct bond_opt_value optval;
713 int ret;
714
715 if (!rtnl_trylock())
716 return restart_syscall();
717 bond_opt_initstr(&optval, buf);
718 ret = __bond_opt_set_notify(bond, option, &optval);
719 rtnl_unlock();
720
721 return ret;
722 }
723
724 /**
725 * bond_opt_get - get a pointer to an option
726 * @option: option for which to return a pointer
727 *
728 * This function checks if option is valid and if so returns a pointer
729 * to its entry in the bond_opts[] option array.
730 */
731 const struct bond_option *bond_opt_get(unsigned int option)
732 {
733 if (!BOND_OPT_VALID(option))
734 return NULL;
735
736 return &bond_opts[option];
737 }
738
739 static int bond_option_mode_set(struct bonding *bond,
740 const struct bond_opt_value *newval)
741 {
742 if (!bond_mode_uses_arp(newval->value)) {
743 if (bond->params.arp_interval) {
744 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
745 newval->string);
746 /* disable arp monitoring */
747 bond->params.arp_interval = 0;
748 }
749
750 if (!bond->params.miimon) {
751 /* set miimon to default value */
752 bond->params.miimon = BOND_DEFAULT_MIIMON;
753 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
754 bond->params.miimon);
755 }
756 }
757
758 if (newval->value == BOND_MODE_ALB)
759 bond->params.tlb_dynamic_lb = 1;
760
761 /* don't cache arp_validate between modes */
762 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
763 bond->params.mode = newval->value;
764
765 return 0;
766 }
767
768 static int bond_option_active_slave_set(struct bonding *bond,
769 const struct bond_opt_value *newval)
770 {
771 char ifname[IFNAMSIZ] = { 0, };
772 struct net_device *slave_dev;
773 int ret = 0;
774
775 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
776 if (!strlen(ifname) || newval->string[0] == '\n') {
777 slave_dev = NULL;
778 } else {
779 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
780 if (!slave_dev)
781 return -ENODEV;
782 }
783
784 if (slave_dev) {
785 if (!netif_is_bond_slave(slave_dev)) {
786 netdev_err(bond->dev, "Device %s is not bonding slave\n",
787 slave_dev->name);
788 return -EINVAL;
789 }
790
791 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
792 netdev_err(bond->dev, "Device %s is not our slave\n",
793 slave_dev->name);
794 return -EINVAL;
795 }
796 }
797
798 block_netpoll_tx();
799 /* check to see if we are clearing active */
800 if (!slave_dev) {
801 netdev_dbg(bond->dev, "Clearing current active slave\n");
802 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
803 bond_select_active_slave(bond);
804 } else {
805 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
806 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
807
808 BUG_ON(!new_active);
809
810 if (new_active == old_active) {
811 /* do nothing */
812 netdev_dbg(bond->dev, "%s is already the current active slave\n",
813 new_active->dev->name);
814 } else {
815 if (old_active && (new_active->link == BOND_LINK_UP) &&
816 bond_slave_is_up(new_active)) {
817 netdev_dbg(bond->dev, "Setting %s as active slave\n",
818 new_active->dev->name);
819 bond_change_active_slave(bond, new_active);
820 } else {
821 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
822 new_active->dev->name,
823 new_active->dev->name);
824 ret = -EINVAL;
825 }
826 }
827 }
828 unblock_netpoll_tx();
829
830 return ret;
831 }
832
833 /* There are two tricky bits here. First, if MII monitoring is activated, then
834 * we must disable ARP monitoring. Second, if the timer isn't running, we must
835 * start it.
836 */
837 static int bond_option_miimon_set(struct bonding *bond,
838 const struct bond_opt_value *newval)
839 {
840 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
841 newval->value);
842 bond->params.miimon = newval->value;
843 if (bond->params.updelay)
844 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
845 bond->params.updelay * bond->params.miimon);
846 if (bond->params.downdelay)
847 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
848 bond->params.downdelay * bond->params.miimon);
849 if (newval->value && bond->params.arp_interval) {
850 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
851 bond->params.arp_interval = 0;
852 if (bond->params.arp_validate)
853 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
854 }
855 if (bond->dev->flags & IFF_UP) {
856 /* If the interface is up, we may need to fire off
857 * the MII timer. If the interface is down, the
858 * timer will get fired off when the open function
859 * is called.
860 */
861 if (!newval->value) {
862 cancel_delayed_work_sync(&bond->mii_work);
863 } else {
864 cancel_delayed_work_sync(&bond->arp_work);
865 queue_delayed_work(bond->wq, &bond->mii_work, 0);
866 }
867 }
868
869 return 0;
870 }
871
872 /* Set up and down delays. These must be multiples of the
873 * MII monitoring value, and are stored internally as the multiplier.
874 * Thus, we must translate to MS for the real world.
875 */
876 static int bond_option_updelay_set(struct bonding *bond,
877 const struct bond_opt_value *newval)
878 {
879 int value = newval->value;
880
881 if (!bond->params.miimon) {
882 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
883 return -EPERM;
884 }
885 if ((value % bond->params.miimon) != 0) {
886 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
887 value, bond->params.miimon,
888 (value / bond->params.miimon) *
889 bond->params.miimon);
890 }
891 bond->params.updelay = value / bond->params.miimon;
892 netdev_dbg(bond->dev, "Setting up delay to %d\n",
893 bond->params.updelay * bond->params.miimon);
894
895 return 0;
896 }
897
898 static int bond_option_downdelay_set(struct bonding *bond,
899 const struct bond_opt_value *newval)
900 {
901 int value = newval->value;
902
903 if (!bond->params.miimon) {
904 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
905 return -EPERM;
906 }
907 if ((value % bond->params.miimon) != 0) {
908 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
909 value, bond->params.miimon,
910 (value / bond->params.miimon) *
911 bond->params.miimon);
912 }
913 bond->params.downdelay = value / bond->params.miimon;
914 netdev_dbg(bond->dev, "Setting down delay to %d\n",
915 bond->params.downdelay * bond->params.miimon);
916
917 return 0;
918 }
919
920 static int bond_option_use_carrier_set(struct bonding *bond,
921 const struct bond_opt_value *newval)
922 {
923 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
924 newval->value);
925 bond->params.use_carrier = newval->value;
926
927 return 0;
928 }
929
930 /* There are two tricky bits here. First, if ARP monitoring is activated, then
931 * we must disable MII monitoring. Second, if the ARP timer isn't running,
932 * we must start it.
933 */
934 static int bond_option_arp_interval_set(struct bonding *bond,
935 const struct bond_opt_value *newval)
936 {
937 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
938 newval->value);
939 bond->params.arp_interval = newval->value;
940 if (newval->value) {
941 if (bond->params.miimon) {
942 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
943 bond->params.miimon = 0;
944 }
945 if (!bond->params.arp_targets[0])
946 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
947 }
948 if (bond->dev->flags & IFF_UP) {
949 /* If the interface is up, we may need to fire off
950 * the ARP timer. If the interface is down, the
951 * timer will get fired off when the open function
952 * is called.
953 */
954 if (!newval->value) {
955 if (bond->params.arp_validate)
956 bond->recv_probe = NULL;
957 cancel_delayed_work_sync(&bond->arp_work);
958 } else {
959 /* arp_validate can be set only in active-backup mode */
960 bond->recv_probe = bond_arp_rcv;
961 cancel_delayed_work_sync(&bond->mii_work);
962 queue_delayed_work(bond->wq, &bond->arp_work, 0);
963 }
964 }
965
966 return 0;
967 }
968
969 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
970 __be32 target,
971 unsigned long last_rx)
972 {
973 __be32 *targets = bond->params.arp_targets;
974 struct list_head *iter;
975 struct slave *slave;
976
977 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
978 bond_for_each_slave(bond, slave, iter)
979 slave->target_last_arp_rx[slot] = last_rx;
980 targets[slot] = target;
981 }
982 }
983
984 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
985 {
986 __be32 *targets = bond->params.arp_targets;
987 int ind;
988
989 if (!bond_is_ip_target_ok(target)) {
990 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
991 &target);
992 return -EINVAL;
993 }
994
995 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
996 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
997 &target);
998 return -EINVAL;
999 }
1000
1001 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1002 if (ind == -1) {
1003 netdev_err(bond->dev, "ARP target table is full!\n");
1004 return -EINVAL;
1005 }
1006
1007 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1008
1009 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1010
1011 return 0;
1012 }
1013
1014 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1015 {
1016 return _bond_option_arp_ip_target_add(bond, target);
1017 }
1018
1019 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1020 {
1021 __be32 *targets = bond->params.arp_targets;
1022 struct list_head *iter;
1023 struct slave *slave;
1024 unsigned long *targets_rx;
1025 int ind, i;
1026
1027 if (!bond_is_ip_target_ok(target)) {
1028 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1029 &target);
1030 return -EINVAL;
1031 }
1032
1033 ind = bond_get_targets_ip(targets, target);
1034 if (ind == -1) {
1035 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1036 &target);
1037 return -EINVAL;
1038 }
1039
1040 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1041 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1042
1043 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1044
1045 bond_for_each_slave(bond, slave, iter) {
1046 targets_rx = slave->target_last_arp_rx;
1047 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1048 targets_rx[i] = targets_rx[i+1];
1049 targets_rx[i] = 0;
1050 }
1051 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1052 targets[i] = targets[i+1];
1053 targets[i] = 0;
1054
1055 return 0;
1056 }
1057
1058 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1059 {
1060 int i;
1061
1062 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1063 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1064 }
1065
1066 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1067 const struct bond_opt_value *newval)
1068 {
1069 int ret = -EPERM;
1070 __be32 target;
1071
1072 if (newval->string) {
1073 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1074 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1075 &target);
1076 return ret;
1077 }
1078 if (newval->string[0] == '+')
1079 ret = bond_option_arp_ip_target_add(bond, target);
1080 else if (newval->string[0] == '-')
1081 ret = bond_option_arp_ip_target_rem(bond, target);
1082 else
1083 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1084 } else {
1085 target = newval->value;
1086 ret = bond_option_arp_ip_target_add(bond, target);
1087 }
1088
1089 return ret;
1090 }
1091
1092 static int bond_option_arp_validate_set(struct bonding *bond,
1093 const struct bond_opt_value *newval)
1094 {
1095 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1096 newval->string, newval->value);
1097 bond->params.arp_validate = newval->value;
1098
1099 return 0;
1100 }
1101
1102 static int bond_option_arp_all_targets_set(struct bonding *bond,
1103 const struct bond_opt_value *newval)
1104 {
1105 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1106 newval->string, newval->value);
1107 bond->params.arp_all_targets = newval->value;
1108
1109 return 0;
1110 }
1111
1112 static int bond_option_primary_set(struct bonding *bond,
1113 const struct bond_opt_value *newval)
1114 {
1115 char *p, *primary = newval->string;
1116 struct list_head *iter;
1117 struct slave *slave;
1118
1119 block_netpoll_tx();
1120
1121 p = strchr(primary, '\n');
1122 if (p)
1123 *p = '\0';
1124 /* check to see if we are clearing primary */
1125 if (!strlen(primary)) {
1126 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1127 RCU_INIT_POINTER(bond->primary_slave, NULL);
1128 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1129 bond_select_active_slave(bond);
1130 goto out;
1131 }
1132
1133 bond_for_each_slave(bond, slave, iter) {
1134 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1135 netdev_dbg(bond->dev, "Setting %s as primary slave\n",
1136 slave->dev->name);
1137 rcu_assign_pointer(bond->primary_slave, slave);
1138 strcpy(bond->params.primary, slave->dev->name);
1139 bond->force_primary = true;
1140 bond_select_active_slave(bond);
1141 goto out;
1142 }
1143 }
1144
1145 if (rtnl_dereference(bond->primary_slave)) {
1146 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1147 RCU_INIT_POINTER(bond->primary_slave, NULL);
1148 bond_select_active_slave(bond);
1149 }
1150 strncpy(bond->params.primary, primary, IFNAMSIZ);
1151 bond->params.primary[IFNAMSIZ - 1] = 0;
1152
1153 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1154 primary, bond->dev->name);
1155
1156 out:
1157 unblock_netpoll_tx();
1158
1159 return 0;
1160 }
1161
1162 static int bond_option_primary_reselect_set(struct bonding *bond,
1163 const struct bond_opt_value *newval)
1164 {
1165 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1166 newval->string, newval->value);
1167 bond->params.primary_reselect = newval->value;
1168
1169 block_netpoll_tx();
1170 bond_select_active_slave(bond);
1171 unblock_netpoll_tx();
1172
1173 return 0;
1174 }
1175
1176 static int bond_option_fail_over_mac_set(struct bonding *bond,
1177 const struct bond_opt_value *newval)
1178 {
1179 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1180 newval->string, newval->value);
1181 bond->params.fail_over_mac = newval->value;
1182
1183 return 0;
1184 }
1185
1186 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1187 const struct bond_opt_value *newval)
1188 {
1189 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1190 newval->string, newval->value);
1191 bond->params.xmit_policy = newval->value;
1192
1193 return 0;
1194 }
1195
1196 static int bond_option_resend_igmp_set(struct bonding *bond,
1197 const struct bond_opt_value *newval)
1198 {
1199 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1200 newval->value);
1201 bond->params.resend_igmp = newval->value;
1202
1203 return 0;
1204 }
1205
1206 static int bond_option_num_peer_notif_set(struct bonding *bond,
1207 const struct bond_opt_value *newval)
1208 {
1209 bond->params.num_peer_notif = newval->value;
1210
1211 return 0;
1212 }
1213
1214 static int bond_option_all_slaves_active_set(struct bonding *bond,
1215 const struct bond_opt_value *newval)
1216 {
1217 struct list_head *iter;
1218 struct slave *slave;
1219
1220 if (newval->value == bond->params.all_slaves_active)
1221 return 0;
1222 bond->params.all_slaves_active = newval->value;
1223 bond_for_each_slave(bond, slave, iter) {
1224 if (!bond_is_active_slave(slave)) {
1225 if (newval->value)
1226 slave->inactive = 0;
1227 else
1228 slave->inactive = 1;
1229 }
1230 }
1231
1232 return 0;
1233 }
1234
1235 static int bond_option_min_links_set(struct bonding *bond,
1236 const struct bond_opt_value *newval)
1237 {
1238 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1239 newval->value);
1240 bond->params.min_links = newval->value;
1241 bond_set_carrier(bond);
1242
1243 return 0;
1244 }
1245
1246 static int bond_option_lp_interval_set(struct bonding *bond,
1247 const struct bond_opt_value *newval)
1248 {
1249 bond->params.lp_interval = newval->value;
1250
1251 return 0;
1252 }
1253
1254 static int bond_option_pps_set(struct bonding *bond,
1255 const struct bond_opt_value *newval)
1256 {
1257 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1258 newval->value);
1259 bond->params.packets_per_slave = newval->value;
1260 if (newval->value > 0) {
1261 bond->params.reciprocal_packets_per_slave =
1262 reciprocal_value(newval->value);
1263 } else {
1264 /* reciprocal_packets_per_slave is unused if
1265 * packets_per_slave is 0 or 1, just initialize it
1266 */
1267 bond->params.reciprocal_packets_per_slave =
1268 (struct reciprocal_value) { 0 };
1269 }
1270
1271 return 0;
1272 }
1273
1274 static int bond_option_lacp_rate_set(struct bonding *bond,
1275 const struct bond_opt_value *newval)
1276 {
1277 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1278 newval->string, newval->value);
1279 bond->params.lacp_fast = newval->value;
1280 bond_3ad_update_lacp_rate(bond);
1281
1282 return 0;
1283 }
1284
1285 static int bond_option_ad_select_set(struct bonding *bond,
1286 const struct bond_opt_value *newval)
1287 {
1288 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1289 newval->string, newval->value);
1290 bond->params.ad_select = newval->value;
1291
1292 return 0;
1293 }
1294
1295 static int bond_option_queue_id_set(struct bonding *bond,
1296 const struct bond_opt_value *newval)
1297 {
1298 struct slave *slave, *update_slave;
1299 struct net_device *sdev;
1300 struct list_head *iter;
1301 char *delim;
1302 int ret = 0;
1303 u16 qid;
1304
1305 /* delim will point to queue id if successful */
1306 delim = strchr(newval->string, ':');
1307 if (!delim)
1308 goto err_no_cmd;
1309
1310 /* Terminate string that points to device name and bump it
1311 * up one, so we can read the queue id there.
1312 */
1313 *delim = '\0';
1314 if (sscanf(++delim, "%hd\n", &qid) != 1)
1315 goto err_no_cmd;
1316
1317 /* Check buffer length, valid ifname and queue id */
1318 if (!dev_valid_name(newval->string) ||
1319 qid > bond->dev->real_num_tx_queues)
1320 goto err_no_cmd;
1321
1322 /* Get the pointer to that interface if it exists */
1323 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1324 if (!sdev)
1325 goto err_no_cmd;
1326
1327 /* Search for thes slave and check for duplicate qids */
1328 update_slave = NULL;
1329 bond_for_each_slave(bond, slave, iter) {
1330 if (sdev == slave->dev)
1331 /* We don't need to check the matching
1332 * slave for dups, since we're overwriting it
1333 */
1334 update_slave = slave;
1335 else if (qid && qid == slave->queue_id) {
1336 goto err_no_cmd;
1337 }
1338 }
1339
1340 if (!update_slave)
1341 goto err_no_cmd;
1342
1343 /* Actually set the qids for the slave */
1344 update_slave->queue_id = qid;
1345
1346 out:
1347 return ret;
1348
1349 err_no_cmd:
1350 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1351 ret = -EPERM;
1352 goto out;
1353
1354 }
1355
1356 static int bond_option_slaves_set(struct bonding *bond,
1357 const struct bond_opt_value *newval)
1358 {
1359 char command[IFNAMSIZ + 1] = { 0, };
1360 struct net_device *dev;
1361 char *ifname;
1362 int ret;
1363
1364 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1365 ifname = command + 1;
1366 if ((strlen(command) <= 1) ||
1367 (command[0] != '+' && command[0] != '-') ||
1368 !dev_valid_name(ifname))
1369 goto err_no_cmd;
1370
1371 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1372 if (!dev) {
1373 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1374 ifname);
1375 ret = -ENODEV;
1376 goto out;
1377 }
1378
1379 switch (command[0]) {
1380 case '+':
1381 netdev_dbg(bond->dev, "Adding slave %s\n", dev->name);
1382 ret = bond_enslave(bond->dev, dev, NULL);
1383 break;
1384
1385 case '-':
1386 netdev_dbg(bond->dev, "Removing slave %s\n", dev->name);
1387 ret = bond_release(bond->dev, dev);
1388 break;
1389
1390 default:
1391 /* should not run here. */
1392 goto err_no_cmd;
1393 }
1394
1395 out:
1396 return ret;
1397
1398 err_no_cmd:
1399 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1400 ret = -EPERM;
1401 goto out;
1402 }
1403
1404 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1405 const struct bond_opt_value *newval)
1406 {
1407 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1408 newval->string, newval->value);
1409 bond->params.tlb_dynamic_lb = newval->value;
1410
1411 return 0;
1412 }
1413
1414 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1415 const struct bond_opt_value *newval)
1416 {
1417 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1418 newval->value);
1419
1420 bond->params.ad_actor_sys_prio = newval->value;
1421 bond_3ad_update_ad_actor_settings(bond);
1422
1423 return 0;
1424 }
1425
1426 static int bond_option_ad_actor_system_set(struct bonding *bond,
1427 const struct bond_opt_value *newval)
1428 {
1429 u8 macaddr[ETH_ALEN];
1430 u8 *mac;
1431
1432 if (newval->string) {
1433 if (!mac_pton(newval->string, macaddr))
1434 goto err;
1435 mac = macaddr;
1436 } else {
1437 mac = (u8 *)&newval->value;
1438 }
1439
1440 if (!is_valid_ether_addr(mac))
1441 goto err;
1442
1443 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1444 ether_addr_copy(bond->params.ad_actor_system, mac);
1445 bond_3ad_update_ad_actor_settings(bond);
1446
1447 return 0;
1448
1449 err:
1450 netdev_err(bond->dev, "Invalid MAC address.\n");
1451 return -EINVAL;
1452 }
1453
1454 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1455 const struct bond_opt_value *newval)
1456 {
1457 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1458 newval->value);
1459
1460 bond->params.ad_user_port_key = newval->value;
1461 return 0;
1462 }
Linux with added FPC-III support