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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / net / bonding / bond_options.c
bloba4e4e15f574df253751355bb9f74e12c325e6f49
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_peer_notif_delay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29 static int bond_option_use_carrier_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31 static int bond_option_arp_interval_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
34 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
35 static int bond_option_arp_ip_targets_set(struct bonding *bond,
36 const struct bond_opt_value *newval);
37 static int bond_option_arp_validate_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39 static int bond_option_arp_all_targets_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41 static int bond_option_primary_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43 static int bond_option_primary_reselect_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45 static int bond_option_fail_over_mac_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49 static int bond_option_resend_igmp_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51 static int bond_option_num_peer_notif_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53 static int bond_option_all_slaves_active_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55 static int bond_option_min_links_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57 static int bond_option_lp_interval_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59 static int bond_option_pps_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61 static int bond_option_lacp_rate_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63 static int bond_option_ad_select_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65 static int bond_option_queue_id_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67 static int bond_option_mode_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69 static int bond_option_slaves_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
74 const struct bond_opt_value *newval);
75 static int bond_option_ad_actor_system_set(struct bonding *bond,
76 const struct bond_opt_value *newval);
77 static int bond_option_ad_user_port_key_set(struct bonding *bond,
78 const struct bond_opt_value *newval);
79
80
81 static const struct bond_opt_value bond_mode_tbl[] = {
82 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
83 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
84 { "balance-xor", BOND_MODE_XOR, 0},
85 { "broadcast", BOND_MODE_BROADCAST, 0},
86 { "802.3ad", BOND_MODE_8023AD, 0},
87 { "balance-tlb", BOND_MODE_TLB, 0},
88 { "balance-alb", BOND_MODE_ALB, 0},
89 { NULL, -1, 0},
90 };
91
92 static const struct bond_opt_value bond_pps_tbl[] = {
93 { "default", 1, BOND_VALFLAG_DEFAULT},
94 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
95 { NULL, -1, 0},
96 };
97
98 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
99 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
100 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
101 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
102 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
103 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
104 { NULL, -1, 0},
105 };
106
107 static const struct bond_opt_value bond_arp_validate_tbl[] = {
108 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
109 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
110 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
111 { "all", BOND_ARP_VALIDATE_ALL, 0},
112 { "filter", BOND_ARP_FILTER, 0},
113 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
114 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
115 { NULL, -1, 0},
116 };
117
118 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
119 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
120 { "all", BOND_ARP_TARGETS_ALL, 0},
121 { NULL, -1, 0},
122 };
123
124 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
125 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
126 { "active", BOND_FOM_ACTIVE, 0},
127 { "follow", BOND_FOM_FOLLOW, 0},
128 { NULL, -1, 0},
129 };
130
131 static const struct bond_opt_value bond_intmax_tbl[] = {
132 { "off", 0, BOND_VALFLAG_DEFAULT},
133 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
134 { NULL, -1, 0}
135 };
136
137 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
138 { "slow", AD_LACP_SLOW, 0},
139 { "fast", AD_LACP_FAST, 0},
140 { NULL, -1, 0},
141 };
142
143 static const struct bond_opt_value bond_ad_select_tbl[] = {
144 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
145 { "bandwidth", BOND_AD_BANDWIDTH, 0},
146 { "count", BOND_AD_COUNT, 0},
147 { NULL, -1, 0},
148 };
149
150 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
151 { "off", 0, 0},
152 { "maxval", 255, BOND_VALFLAG_MAX},
153 { "default", 1, BOND_VALFLAG_DEFAULT},
154 { NULL, -1, 0}
155 };
156
157 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
158 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
159 { "better", BOND_PRI_RESELECT_BETTER, 0},
160 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
161 { NULL, -1},
162 };
163
164 static const struct bond_opt_value bond_use_carrier_tbl[] = {
165 { "off", 0, 0},
166 { "on", 1, BOND_VALFLAG_DEFAULT},
167 { NULL, -1, 0}
168 };
169
170 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
171 { "off", 0, BOND_VALFLAG_DEFAULT},
172 { "on", 1, 0},
173 { NULL, -1, 0}
174 };
175
176 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
177 { "off", 0, 0},
178 { "maxval", 255, BOND_VALFLAG_MAX},
179 { "default", 1, BOND_VALFLAG_DEFAULT},
180 { NULL, -1, 0}
181 };
182
183 static const struct bond_opt_value bond_lp_interval_tbl[] = {
184 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
185 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
186 { NULL, -1, 0},
187 };
188
189 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
190 { "off", 0, 0},
191 { "on", 1, BOND_VALFLAG_DEFAULT},
192 { NULL, -1, 0}
193 };
194
195 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
196 { "minval", 1, BOND_VALFLAG_MIN},
197 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
198 { NULL, -1, 0},
199 };
200
201 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
202 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
203 { "maxval", 1023, BOND_VALFLAG_MAX},
204 { NULL, -1, 0},
205 };
206
207 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
208 [BOND_OPT_MODE] = {
209 .id = BOND_OPT_MODE,
210 .name = "mode",
211 .desc = "bond device mode",
212 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
213 .values = bond_mode_tbl,
214 .set = bond_option_mode_set
215 },
216 [BOND_OPT_PACKETS_PER_SLAVE] = {
217 .id = BOND_OPT_PACKETS_PER_SLAVE,
218 .name = "packets_per_slave",
219 .desc = "Packets to send per slave in RR mode",
220 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
221 .values = bond_pps_tbl,
222 .set = bond_option_pps_set
223 },
224 [BOND_OPT_XMIT_HASH] = {
225 .id = BOND_OPT_XMIT_HASH,
226 .name = "xmit_hash_policy",
227 .desc = "balance-xor, 802.3ad, and tlb hashing method",
228 .values = bond_xmit_hashtype_tbl,
229 .set = bond_option_xmit_hash_policy_set
230 },
231 [BOND_OPT_ARP_VALIDATE] = {
232 .id = BOND_OPT_ARP_VALIDATE,
233 .name = "arp_validate",
234 .desc = "validate src/dst of ARP probes",
235 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
236 BIT(BOND_MODE_ALB),
237 .values = bond_arp_validate_tbl,
238 .set = bond_option_arp_validate_set
239 },
240 [BOND_OPT_ARP_ALL_TARGETS] = {
241 .id = BOND_OPT_ARP_ALL_TARGETS,
242 .name = "arp_all_targets",
243 .desc = "fail on any/all arp targets timeout",
244 .values = bond_arp_all_targets_tbl,
245 .set = bond_option_arp_all_targets_set
246 },
247 [BOND_OPT_FAIL_OVER_MAC] = {
248 .id = BOND_OPT_FAIL_OVER_MAC,
249 .name = "fail_over_mac",
250 .desc = "For active-backup, do not set all slaves to the same MAC",
251 .flags = BOND_OPTFLAG_NOSLAVES,
252 .values = bond_fail_over_mac_tbl,
253 .set = bond_option_fail_over_mac_set
254 },
255 [BOND_OPT_ARP_INTERVAL] = {
256 .id = BOND_OPT_ARP_INTERVAL,
257 .name = "arp_interval",
258 .desc = "arp interval in milliseconds",
259 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
260 BIT(BOND_MODE_ALB),
261 .values = bond_intmax_tbl,
262 .set = bond_option_arp_interval_set
263 },
264 [BOND_OPT_ARP_TARGETS] = {
265 .id = BOND_OPT_ARP_TARGETS,
266 .name = "arp_ip_target",
267 .desc = "arp targets in n.n.n.n form",
268 .flags = BOND_OPTFLAG_RAWVAL,
269 .set = bond_option_arp_ip_targets_set
270 },
271 [BOND_OPT_DOWNDELAY] = {
272 .id = BOND_OPT_DOWNDELAY,
273 .name = "downdelay",
274 .desc = "Delay before considering link down, in milliseconds",
275 .values = bond_intmax_tbl,
276 .set = bond_option_downdelay_set
277 },
278 [BOND_OPT_UPDELAY] = {
279 .id = BOND_OPT_UPDELAY,
280 .name = "updelay",
281 .desc = "Delay before considering link up, in milliseconds",
282 .values = bond_intmax_tbl,
283 .set = bond_option_updelay_set
284 },
285 [BOND_OPT_LACP_RATE] = {
286 .id = BOND_OPT_LACP_RATE,
287 .name = "lacp_rate",
288 .desc = "LACPDU tx rate to request from 802.3ad partner",
289 .flags = BOND_OPTFLAG_IFDOWN,
290 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
291 .values = bond_lacp_rate_tbl,
292 .set = bond_option_lacp_rate_set
293 },
294 [BOND_OPT_MINLINKS] = {
295 .id = BOND_OPT_MINLINKS,
296 .name = "min_links",
297 .desc = "Minimum number of available links before turning on carrier",
298 .values = bond_intmax_tbl,
299 .set = bond_option_min_links_set
300 },
301 [BOND_OPT_AD_SELECT] = {
302 .id = BOND_OPT_AD_SELECT,
303 .name = "ad_select",
304 .desc = "803.ad aggregation selection logic",
305 .flags = BOND_OPTFLAG_IFDOWN,
306 .values = bond_ad_select_tbl,
307 .set = bond_option_ad_select_set
308 },
309 [BOND_OPT_NUM_PEER_NOTIF] = {
310 .id = BOND_OPT_NUM_PEER_NOTIF,
311 .name = "num_unsol_na",
312 .desc = "Number of peer notifications to send on failover event",
313 .values = bond_num_peer_notif_tbl,
314 .set = bond_option_num_peer_notif_set
315 },
316 [BOND_OPT_MIIMON] = {
317 .id = BOND_OPT_MIIMON,
318 .name = "miimon",
319 .desc = "Link check interval in milliseconds",
320 .values = bond_intmax_tbl,
321 .set = bond_option_miimon_set
322 },
323 [BOND_OPT_PRIMARY] = {
324 .id = BOND_OPT_PRIMARY,
325 .name = "primary",
326 .desc = "Primary network device to use",
327 .flags = BOND_OPTFLAG_RAWVAL,
328 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
329 BIT(BOND_MODE_TLB) |
330 BIT(BOND_MODE_ALB)),
331 .set = bond_option_primary_set
332 },
333 [BOND_OPT_PRIMARY_RESELECT] = {
334 .id = BOND_OPT_PRIMARY_RESELECT,
335 .name = "primary_reselect",
336 .desc = "Reselect primary slave once it comes up",
337 .values = bond_primary_reselect_tbl,
338 .set = bond_option_primary_reselect_set
339 },
340 [BOND_OPT_USE_CARRIER] = {
341 .id = BOND_OPT_USE_CARRIER,
342 .name = "use_carrier",
343 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
344 .values = bond_use_carrier_tbl,
345 .set = bond_option_use_carrier_set
346 },
347 [BOND_OPT_ACTIVE_SLAVE] = {
348 .id = BOND_OPT_ACTIVE_SLAVE,
349 .name = "active_slave",
350 .desc = "Currently active slave",
351 .flags = BOND_OPTFLAG_RAWVAL,
352 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
353 BIT(BOND_MODE_TLB) |
354 BIT(BOND_MODE_ALB)),
355 .set = bond_option_active_slave_set
356 },
357 [BOND_OPT_QUEUE_ID] = {
358 .id = BOND_OPT_QUEUE_ID,
359 .name = "queue_id",
360 .desc = "Set queue id of a slave",
361 .flags = BOND_OPTFLAG_RAWVAL,
362 .set = bond_option_queue_id_set
363 },
364 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
365 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
366 .name = "all_slaves_active",
367 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
368 .values = bond_all_slaves_active_tbl,
369 .set = bond_option_all_slaves_active_set
370 },
371 [BOND_OPT_RESEND_IGMP] = {
372 .id = BOND_OPT_RESEND_IGMP,
373 .name = "resend_igmp",
374 .desc = "Number of IGMP membership reports to send on link failure",
375 .values = bond_resend_igmp_tbl,
376 .set = bond_option_resend_igmp_set
377 },
378 [BOND_OPT_LP_INTERVAL] = {
379 .id = BOND_OPT_LP_INTERVAL,
380 .name = "lp_interval",
381 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
382 .values = bond_lp_interval_tbl,
383 .set = bond_option_lp_interval_set
384 },
385 [BOND_OPT_SLAVES] = {
386 .id = BOND_OPT_SLAVES,
387 .name = "slaves",
388 .desc = "Slave membership management",
389 .flags = BOND_OPTFLAG_RAWVAL,
390 .set = bond_option_slaves_set
391 },
392 [BOND_OPT_TLB_DYNAMIC_LB] = {
393 .id = BOND_OPT_TLB_DYNAMIC_LB,
394 .name = "tlb_dynamic_lb",
395 .desc = "Enable dynamic flow shuffling",
396 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
397 .values = bond_tlb_dynamic_lb_tbl,
398 .flags = BOND_OPTFLAG_IFDOWN,
399 .set = bond_option_tlb_dynamic_lb_set,
400 },
401 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
402 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
403 .name = "ad_actor_sys_prio",
404 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
405 .values = bond_ad_actor_sys_prio_tbl,
406 .set = bond_option_ad_actor_sys_prio_set,
407 },
408 [BOND_OPT_AD_ACTOR_SYSTEM] = {
409 .id = BOND_OPT_AD_ACTOR_SYSTEM,
410 .name = "ad_actor_system",
411 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
412 .flags = BOND_OPTFLAG_RAWVAL,
413 .set = bond_option_ad_actor_system_set,
414 },
415 [BOND_OPT_AD_USER_PORT_KEY] = {
416 .id = BOND_OPT_AD_USER_PORT_KEY,
417 .name = "ad_user_port_key",
418 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
419 .flags = BOND_OPTFLAG_IFDOWN,
420 .values = bond_ad_user_port_key_tbl,
421 .set = bond_option_ad_user_port_key_set,
422 },
423 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
424 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
425 .name = "num_grat_arp",
426 .desc = "Number of peer notifications to send on failover event",
427 .values = bond_num_peer_notif_tbl,
428 .set = bond_option_num_peer_notif_set
429 },
430 [BOND_OPT_PEER_NOTIF_DELAY] = {
431 .id = BOND_OPT_PEER_NOTIF_DELAY,
432 .name = "peer_notif_delay",
433 .desc = "Delay between each peer notification on failover event, in milliseconds",
434 .values = bond_intmax_tbl,
435 .set = bond_option_peer_notif_delay_set
436 }
437 };
438
439 /* Searches for an option by name */
440 const struct bond_option *bond_opt_get_by_name(const char *name)
441 {
442 const struct bond_option *opt;
443 int option;
444
445 for (option = 0; option < BOND_OPT_LAST; option++) {
446 opt = bond_opt_get(option);
447 if (opt && !strcmp(opt->name, name))
448 return opt;
449 }
450
451 return NULL;
452 }
453
454 /* Searches for a value in opt's values[] table */
455 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
456 {
457 const struct bond_option *opt;
458 int i;
459
460 opt = bond_opt_get(option);
461 if (WARN_ON(!opt))
462 return NULL;
463 for (i = 0; opt->values && opt->values[i].string; i++)
464 if (opt->values[i].value == val)
465 return &opt->values[i];
466
467 return NULL;
468 }
469
470 /* Searches for a value in opt's values[] table which matches the flagmask */
471 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
472 u32 flagmask)
473 {
474 int i;
475
476 for (i = 0; opt->values && opt->values[i].string; i++)
477 if (opt->values[i].flags & flagmask)
478 return &opt->values[i];
479
480 return NULL;
481 }
482
483 /* If maxval is missing then there's no range to check. In case minval is
484 * missing then it's considered to be 0.
485 */
486 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
487 {
488 const struct bond_opt_value *minval, *maxval;
489
490 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
491 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
492 if (!maxval || (minval && val < minval->value) || val > maxval->value)
493 return false;
494
495 return true;
496 }
497
498 /**
499 * bond_opt_parse - parse option value
500 * @opt: the option to parse against
501 * @val: value to parse
502 *
503 * This function tries to extract the value from @val and check if it's
504 * a possible match for the option and returns NULL if a match isn't found,
505 * or the struct_opt_value that matched. It also strips the new line from
506 * @val->string if it's present.
507 */
508 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
509 struct bond_opt_value *val)
510 {
511 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
512 const struct bond_opt_value *tbl;
513 const struct bond_opt_value *ret = NULL;
514 bool checkval;
515 int i, rv;
516
517 /* No parsing if the option wants a raw val */
518 if (opt->flags & BOND_OPTFLAG_RAWVAL)
519 return val;
520
521 tbl = opt->values;
522 if (!tbl)
523 goto out;
524
525 /* ULLONG_MAX is used to bypass string processing */
526 checkval = val->value != ULLONG_MAX;
527 if (!checkval) {
528 if (!val->string)
529 goto out;
530 p = strchr(val->string, '\n');
531 if (p)
532 *p = '\0';
533 for (p = val->string; *p; p++)
534 if (!(isdigit(*p) || isspace(*p)))
535 break;
536 /* The following code extracts the string to match or the value
537 * and sets checkval appropriately
538 */
539 if (*p) {
540 rv = sscanf(val->string, "%32s", valstr);
541 } else {
542 rv = sscanf(val->string, "%llu", &val->value);
543 checkval = true;
544 }
545 if (!rv)
546 goto out;
547 }
548
549 for (i = 0; tbl[i].string; i++) {
550 /* Check for exact match */
551 if (checkval) {
552 if (val->value == tbl[i].value)
553 ret = &tbl[i];
554 } else {
555 if (!strcmp(valstr, "default") &&
556 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
557 ret = &tbl[i];
558
559 if (!strcmp(valstr, tbl[i].string))
560 ret = &tbl[i];
561 }
562 /* Found an exact match */
563 if (ret)
564 goto out;
565 }
566 /* Possible range match */
567 if (checkval && bond_opt_check_range(opt, val->value))
568 ret = val;
569 out:
570 return ret;
571 }
572
573 /* Check opt's dependencies against bond mode and currently set options */
574 static int bond_opt_check_deps(struct bonding *bond,
575 const struct bond_option *opt)
576 {
577 struct bond_params *params = &bond->params;
578
579 if (test_bit(params->mode, &opt->unsuppmodes))
580 return -EACCES;
581 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
582 return -ENOTEMPTY;
583 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
584 return -EBUSY;
585
586 return 0;
587 }
588
589 static void bond_opt_dep_print(struct bonding *bond,
590 const struct bond_option *opt)
591 {
592 const struct bond_opt_value *modeval;
593 struct bond_params *params;
594
595 params = &bond->params;
596 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
597 if (test_bit(params->mode, &opt->unsuppmodes))
598 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
599 opt->name, modeval->string, modeval->value);
600 }
601
602 static void bond_opt_error_interpret(struct bonding *bond,
603 const struct bond_option *opt,
604 int error, const struct bond_opt_value *val)
605 {
606 const struct bond_opt_value *minval, *maxval;
607 char *p;
608
609 switch (error) {
610 case -EINVAL:
611 if (val) {
612 if (val->string) {
613 /* sometimes RAWVAL opts may have new lines */
614 p = strchr(val->string, '\n');
615 if (p)
616 *p = '\0';
617 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
618 opt->name, val->string);
619 } else {
620 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
621 opt->name, val->value);
622 }
623 }
624 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
625 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
626 if (!maxval)
627 break;
628 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
629 opt->name, minval ? minval->value : 0, maxval->value);
630 break;
631 case -EACCES:
632 bond_opt_dep_print(bond, opt);
633 break;
634 case -ENOTEMPTY:
635 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
636 opt->name);
637 break;
638 case -EBUSY:
639 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
640 opt->name);
641 break;
642 default:
643 break;
644 }
645 }
646
647 /**
648 * __bond_opt_set - set a bonding option
649 * @bond: target bond device
650 * @option: option to set
651 * @val: value to set it to
652 *
653 * This function is used to change the bond's option value, it can be
654 * used for both enabling/changing an option and for disabling it. RTNL lock
655 * must be obtained before calling this function.
656 */
657 int __bond_opt_set(struct bonding *bond,
658 unsigned int option, struct bond_opt_value *val)
659 {
660 const struct bond_opt_value *retval = NULL;
661 const struct bond_option *opt;
662 int ret = -ENOENT;
663
664 ASSERT_RTNL();
665
666 opt = bond_opt_get(option);
667 if (WARN_ON(!val) || WARN_ON(!opt))
668 goto out;
669 ret = bond_opt_check_deps(bond, opt);
670 if (ret)
671 goto out;
672 retval = bond_opt_parse(opt, val);
673 if (!retval) {
674 ret = -EINVAL;
675 goto out;
676 }
677 ret = opt->set(bond, retval);
678 out:
679 if (ret)
680 bond_opt_error_interpret(bond, opt, ret, val);
681
682 return ret;
683 }
684 /**
685 * __bond_opt_set_notify - set a bonding option
686 * @bond: target bond device
687 * @option: option to set
688 * @val: value to set it to
689 *
690 * This function is used to change the bond's option value and trigger
691 * a notification to user sapce. It can be used for both enabling/changing
692 * an option and for disabling it. RTNL lock must be obtained before calling
693 * this function.
694 */
695 int __bond_opt_set_notify(struct bonding *bond,
696 unsigned int option, struct bond_opt_value *val)
697 {
698 int ret = -ENOENT;
699
700 ASSERT_RTNL();
701
702 ret = __bond_opt_set(bond, option, val);
703
704 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
705 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
706
707 return ret;
708 }
709
710 /**
711 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
712 * @bond: target bond device
713 * @option: option to set
714 * @buf: value to set it to
715 *
716 * This function tries to acquire RTNL without blocking and if successful
717 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
718 */
719 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
720 {
721 struct bond_opt_value optval;
722 int ret;
723
724 if (!rtnl_trylock())
725 return restart_syscall();
726 bond_opt_initstr(&optval, buf);
727 ret = __bond_opt_set_notify(bond, option, &optval);
728 rtnl_unlock();
729
730 return ret;
731 }
732
733 /**
734 * bond_opt_get - get a pointer to an option
735 * @option: option for which to return a pointer
736 *
737 * This function checks if option is valid and if so returns a pointer
738 * to its entry in the bond_opts[] option array.
739 */
740 const struct bond_option *bond_opt_get(unsigned int option)
741 {
742 if (!BOND_OPT_VALID(option))
743 return NULL;
744
745 return &bond_opts[option];
746 }
747
748 static void bond_set_xfrm_features(struct net_device *bond_dev, u64 mode)
749 {
750 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
751 return;
752
753 if (mode == BOND_MODE_ACTIVEBACKUP)
754 bond_dev->wanted_features |= BOND_XFRM_FEATURES;
755 else
756 bond_dev->wanted_features &= ~BOND_XFRM_FEATURES;
757
758 netdev_update_features(bond_dev);
759 }
760
761 static int bond_option_mode_set(struct bonding *bond,
762 const struct bond_opt_value *newval)
763 {
764 if (!bond_mode_uses_arp(newval->value)) {
765 if (bond->params.arp_interval) {
766 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
767 newval->string);
768 /* disable arp monitoring */
769 bond->params.arp_interval = 0;
770 }
771
772 if (!bond->params.miimon) {
773 /* set miimon to default value */
774 bond->params.miimon = BOND_DEFAULT_MIIMON;
775 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
776 bond->params.miimon);
777 }
778 }
779
780 if (newval->value == BOND_MODE_ALB)
781 bond->params.tlb_dynamic_lb = 1;
782
783 if (bond->dev->reg_state == NETREG_REGISTERED)
784 bond_set_xfrm_features(bond->dev, newval->value);
785
786 /* don't cache arp_validate between modes */
787 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
788 bond->params.mode = newval->value;
789
790 return 0;
791 }
792
793 static int bond_option_active_slave_set(struct bonding *bond,
794 const struct bond_opt_value *newval)
795 {
796 char ifname[IFNAMSIZ] = { 0, };
797 struct net_device *slave_dev;
798 int ret = 0;
799
800 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
801 if (!strlen(ifname) || newval->string[0] == '\n') {
802 slave_dev = NULL;
803 } else {
804 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
805 if (!slave_dev)
806 return -ENODEV;
807 }
808
809 if (slave_dev) {
810 if (!netif_is_bond_slave(slave_dev)) {
811 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
812 return -EINVAL;
813 }
814
815 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
816 slave_err(bond->dev, slave_dev, "Device is not our slave\n");
817 return -EINVAL;
818 }
819 }
820
821 block_netpoll_tx();
822 /* check to see if we are clearing active */
823 if (!slave_dev) {
824 netdev_dbg(bond->dev, "Clearing current active slave\n");
825 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
826 bond_select_active_slave(bond);
827 } else {
828 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
829 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
830
831 BUG_ON(!new_active);
832
833 if (new_active == old_active) {
834 /* do nothing */
835 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
836 } else {
837 if (old_active && (new_active->link == BOND_LINK_UP) &&
838 bond_slave_is_up(new_active)) {
839 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
840 bond_change_active_slave(bond, new_active);
841 } else {
842 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
843 new_active->dev->name);
844 ret = -EINVAL;
845 }
846 }
847 }
848 unblock_netpoll_tx();
849
850 return ret;
851 }
852
853 /* There are two tricky bits here. First, if MII monitoring is activated, then
854 * we must disable ARP monitoring. Second, if the timer isn't running, we must
855 * start it.
856 */
857 static int bond_option_miimon_set(struct bonding *bond,
858 const struct bond_opt_value *newval)
859 {
860 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
861 newval->value);
862 bond->params.miimon = newval->value;
863 if (bond->params.updelay)
864 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
865 bond->params.updelay * bond->params.miimon);
866 if (bond->params.downdelay)
867 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
868 bond->params.downdelay * bond->params.miimon);
869 if (bond->params.peer_notif_delay)
870 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
871 bond->params.peer_notif_delay * bond->params.miimon);
872 if (newval->value && bond->params.arp_interval) {
873 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
874 bond->params.arp_interval = 0;
875 if (bond->params.arp_validate)
876 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
877 }
878 if (bond->dev->flags & IFF_UP) {
879 /* If the interface is up, we may need to fire off
880 * the MII timer. If the interface is down, the
881 * timer will get fired off when the open function
882 * is called.
883 */
884 if (!newval->value) {
885 cancel_delayed_work_sync(&bond->mii_work);
886 } else {
887 cancel_delayed_work_sync(&bond->arp_work);
888 queue_delayed_work(bond->wq, &bond->mii_work, 0);
889 }
890 }
891
892 return 0;
893 }
894
895 /* Set up, down and peer notification delays. These must be multiples
896 * of the MII monitoring value, and are stored internally as the
897 * multiplier. Thus, we must translate to MS for the real world.
898 */
899 static int _bond_option_delay_set(struct bonding *bond,
900 const struct bond_opt_value *newval,
901 const char *name,
902 int *target)
903 {
904 int value = newval->value;
905
906 if (!bond->params.miimon) {
907 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
908 name);
909 return -EPERM;
910 }
911 if ((value % bond->params.miimon) != 0) {
912 netdev_warn(bond->dev,
913 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
914 name,
915 value, bond->params.miimon,
916 (value / bond->params.miimon) *
917 bond->params.miimon);
918 }
919 *target = value / bond->params.miimon;
920 netdev_dbg(bond->dev, "Setting %s to %d\n",
921 name,
922 *target * bond->params.miimon);
923
924 return 0;
925 }
926
927 static int bond_option_updelay_set(struct bonding *bond,
928 const struct bond_opt_value *newval)
929 {
930 return _bond_option_delay_set(bond, newval, "up delay",
931 &bond->params.updelay);
932 }
933
934 static int bond_option_downdelay_set(struct bonding *bond,
935 const struct bond_opt_value *newval)
936 {
937 return _bond_option_delay_set(bond, newval, "down delay",
938 &bond->params.downdelay);
939 }
940
941 static int bond_option_peer_notif_delay_set(struct bonding *bond,
942 const struct bond_opt_value *newval)
943 {
944 int ret = _bond_option_delay_set(bond, newval,
945 "peer notification delay",
946 &bond->params.peer_notif_delay);
947 return ret;
948 }
949
950 static int bond_option_use_carrier_set(struct bonding *bond,
951 const struct bond_opt_value *newval)
952 {
953 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
954 newval->value);
955 bond->params.use_carrier = newval->value;
956
957 return 0;
958 }
959
960 /* There are two tricky bits here. First, if ARP monitoring is activated, then
961 * we must disable MII monitoring. Second, if the ARP timer isn't running,
962 * we must start it.
963 */
964 static int bond_option_arp_interval_set(struct bonding *bond,
965 const struct bond_opt_value *newval)
966 {
967 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
968 newval->value);
969 bond->params.arp_interval = newval->value;
970 if (newval->value) {
971 if (bond->params.miimon) {
972 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
973 bond->params.miimon = 0;
974 }
975 if (!bond->params.arp_targets[0])
976 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
977 }
978 if (bond->dev->flags & IFF_UP) {
979 /* If the interface is up, we may need to fire off
980 * the ARP timer. If the interface is down, the
981 * timer will get fired off when the open function
982 * is called.
983 */
984 if (!newval->value) {
985 if (bond->params.arp_validate)
986 bond->recv_probe = NULL;
987 cancel_delayed_work_sync(&bond->arp_work);
988 } else {
989 /* arp_validate can be set only in active-backup mode */
990 bond->recv_probe = bond_arp_rcv;
991 cancel_delayed_work_sync(&bond->mii_work);
992 queue_delayed_work(bond->wq, &bond->arp_work, 0);
993 }
994 }
995
996 return 0;
997 }
998
999 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1000 __be32 target,
1001 unsigned long last_rx)
1002 {
1003 __be32 *targets = bond->params.arp_targets;
1004 struct list_head *iter;
1005 struct slave *slave;
1006
1007 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1008 bond_for_each_slave(bond, slave, iter)
1009 slave->target_last_arp_rx[slot] = last_rx;
1010 targets[slot] = target;
1011 }
1012 }
1013
1014 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1015 {
1016 __be32 *targets = bond->params.arp_targets;
1017 int ind;
1018
1019 if (!bond_is_ip_target_ok(target)) {
1020 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1021 &target);
1022 return -EINVAL;
1023 }
1024
1025 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1026 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1027 &target);
1028 return -EINVAL;
1029 }
1030
1031 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1032 if (ind == -1) {
1033 netdev_err(bond->dev, "ARP target table is full!\n");
1034 return -EINVAL;
1035 }
1036
1037 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1038
1039 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1040
1041 return 0;
1042 }
1043
1044 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1045 {
1046 return _bond_option_arp_ip_target_add(bond, target);
1047 }
1048
1049 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1050 {
1051 __be32 *targets = bond->params.arp_targets;
1052 struct list_head *iter;
1053 struct slave *slave;
1054 unsigned long *targets_rx;
1055 int ind, i;
1056
1057 if (!bond_is_ip_target_ok(target)) {
1058 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1059 &target);
1060 return -EINVAL;
1061 }
1062
1063 ind = bond_get_targets_ip(targets, target);
1064 if (ind == -1) {
1065 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1066 &target);
1067 return -EINVAL;
1068 }
1069
1070 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1071 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1072
1073 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1074
1075 bond_for_each_slave(bond, slave, iter) {
1076 targets_rx = slave->target_last_arp_rx;
1077 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1078 targets_rx[i] = targets_rx[i+1];
1079 targets_rx[i] = 0;
1080 }
1081 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1082 targets[i] = targets[i+1];
1083 targets[i] = 0;
1084
1085 return 0;
1086 }
1087
1088 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1089 {
1090 int i;
1091
1092 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1093 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1094 }
1095
1096 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1097 const struct bond_opt_value *newval)
1098 {
1099 int ret = -EPERM;
1100 __be32 target;
1101
1102 if (newval->string) {
1103 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1104 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1105 &target);
1106 return ret;
1107 }
1108 if (newval->string[0] == '+')
1109 ret = bond_option_arp_ip_target_add(bond, target);
1110 else if (newval->string[0] == '-')
1111 ret = bond_option_arp_ip_target_rem(bond, target);
1112 else
1113 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1114 } else {
1115 target = newval->value;
1116 ret = bond_option_arp_ip_target_add(bond, target);
1117 }
1118
1119 return ret;
1120 }
1121
1122 static int bond_option_arp_validate_set(struct bonding *bond,
1123 const struct bond_opt_value *newval)
1124 {
1125 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1126 newval->string, newval->value);
1127 bond->params.arp_validate = newval->value;
1128
1129 return 0;
1130 }
1131
1132 static int bond_option_arp_all_targets_set(struct bonding *bond,
1133 const struct bond_opt_value *newval)
1134 {
1135 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1136 newval->string, newval->value);
1137 bond->params.arp_all_targets = newval->value;
1138
1139 return 0;
1140 }
1141
1142 static int bond_option_primary_set(struct bonding *bond,
1143 const struct bond_opt_value *newval)
1144 {
1145 char *p, *primary = newval->string;
1146 struct list_head *iter;
1147 struct slave *slave;
1148
1149 block_netpoll_tx();
1150
1151 p = strchr(primary, '\n');
1152 if (p)
1153 *p = '\0';
1154 /* check to see if we are clearing primary */
1155 if (!strlen(primary)) {
1156 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1157 RCU_INIT_POINTER(bond->primary_slave, NULL);
1158 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1159 bond_select_active_slave(bond);
1160 goto out;
1161 }
1162
1163 bond_for_each_slave(bond, slave, iter) {
1164 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1165 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1166 rcu_assign_pointer(bond->primary_slave, slave);
1167 strcpy(bond->params.primary, slave->dev->name);
1168 bond->force_primary = true;
1169 bond_select_active_slave(bond);
1170 goto out;
1171 }
1172 }
1173
1174 if (rtnl_dereference(bond->primary_slave)) {
1175 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1176 RCU_INIT_POINTER(bond->primary_slave, NULL);
1177 bond_select_active_slave(bond);
1178 }
1179 strncpy(bond->params.primary, primary, IFNAMSIZ);
1180 bond->params.primary[IFNAMSIZ - 1] = 0;
1181
1182 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1183 primary);
1184
1185 out:
1186 unblock_netpoll_tx();
1187
1188 return 0;
1189 }
1190
1191 static int bond_option_primary_reselect_set(struct bonding *bond,
1192 const struct bond_opt_value *newval)
1193 {
1194 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1195 newval->string, newval->value);
1196 bond->params.primary_reselect = newval->value;
1197
1198 block_netpoll_tx();
1199 bond_select_active_slave(bond);
1200 unblock_netpoll_tx();
1201
1202 return 0;
1203 }
1204
1205 static int bond_option_fail_over_mac_set(struct bonding *bond,
1206 const struct bond_opt_value *newval)
1207 {
1208 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1209 newval->string, newval->value);
1210 bond->params.fail_over_mac = newval->value;
1211
1212 return 0;
1213 }
1214
1215 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1216 const struct bond_opt_value *newval)
1217 {
1218 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1219 newval->string, newval->value);
1220 bond->params.xmit_policy = newval->value;
1221
1222 return 0;
1223 }
1224
1225 static int bond_option_resend_igmp_set(struct bonding *bond,
1226 const struct bond_opt_value *newval)
1227 {
1228 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1229 newval->value);
1230 bond->params.resend_igmp = newval->value;
1231
1232 return 0;
1233 }
1234
1235 static int bond_option_num_peer_notif_set(struct bonding *bond,
1236 const struct bond_opt_value *newval)
1237 {
1238 bond->params.num_peer_notif = newval->value;
1239
1240 return 0;
1241 }
1242
1243 static int bond_option_all_slaves_active_set(struct bonding *bond,
1244 const struct bond_opt_value *newval)
1245 {
1246 struct list_head *iter;
1247 struct slave *slave;
1248
1249 if (newval->value == bond->params.all_slaves_active)
1250 return 0;
1251 bond->params.all_slaves_active = newval->value;
1252 bond_for_each_slave(bond, slave, iter) {
1253 if (!bond_is_active_slave(slave)) {
1254 if (newval->value)
1255 slave->inactive = 0;
1256 else
1257 slave->inactive = 1;
1258 }
1259 }
1260
1261 return 0;
1262 }
1263
1264 static int bond_option_min_links_set(struct bonding *bond,
1265 const struct bond_opt_value *newval)
1266 {
1267 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1268 newval->value);
1269 bond->params.min_links = newval->value;
1270 bond_set_carrier(bond);
1271
1272 return 0;
1273 }
1274
1275 static int bond_option_lp_interval_set(struct bonding *bond,
1276 const struct bond_opt_value *newval)
1277 {
1278 bond->params.lp_interval = newval->value;
1279
1280 return 0;
1281 }
1282
1283 static int bond_option_pps_set(struct bonding *bond,
1284 const struct bond_opt_value *newval)
1285 {
1286 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1287 newval->value);
1288 bond->params.packets_per_slave = newval->value;
1289 if (newval->value > 0) {
1290 bond->params.reciprocal_packets_per_slave =
1291 reciprocal_value(newval->value);
1292 } else {
1293 /* reciprocal_packets_per_slave is unused if
1294 * packets_per_slave is 0 or 1, just initialize it
1295 */
1296 bond->params.reciprocal_packets_per_slave =
1297 (struct reciprocal_value) { 0 };
1298 }
1299
1300 return 0;
1301 }
1302
1303 static int bond_option_lacp_rate_set(struct bonding *bond,
1304 const struct bond_opt_value *newval)
1305 {
1306 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1307 newval->string, newval->value);
1308 bond->params.lacp_fast = newval->value;
1309 bond_3ad_update_lacp_rate(bond);
1310
1311 return 0;
1312 }
1313
1314 static int bond_option_ad_select_set(struct bonding *bond,
1315 const struct bond_opt_value *newval)
1316 {
1317 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1318 newval->string, newval->value);
1319 bond->params.ad_select = newval->value;
1320
1321 return 0;
1322 }
1323
1324 static int bond_option_queue_id_set(struct bonding *bond,
1325 const struct bond_opt_value *newval)
1326 {
1327 struct slave *slave, *update_slave;
1328 struct net_device *sdev;
1329 struct list_head *iter;
1330 char *delim;
1331 int ret = 0;
1332 u16 qid;
1333
1334 /* delim will point to queue id if successful */
1335 delim = strchr(newval->string, ':');
1336 if (!delim)
1337 goto err_no_cmd;
1338
1339 /* Terminate string that points to device name and bump it
1340 * up one, so we can read the queue id there.
1341 */
1342 *delim = '\0';
1343 if (sscanf(++delim, "%hd\n", &qid) != 1)
1344 goto err_no_cmd;
1345
1346 /* Check buffer length, valid ifname and queue id */
1347 if (!dev_valid_name(newval->string) ||
1348 qid > bond->dev->real_num_tx_queues)
1349 goto err_no_cmd;
1350
1351 /* Get the pointer to that interface if it exists */
1352 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1353 if (!sdev)
1354 goto err_no_cmd;
1355
1356 /* Search for thes slave and check for duplicate qids */
1357 update_slave = NULL;
1358 bond_for_each_slave(bond, slave, iter) {
1359 if (sdev == slave->dev)
1360 /* We don't need to check the matching
1361 * slave for dups, since we're overwriting it
1362 */
1363 update_slave = slave;
1364 else if (qid && qid == slave->queue_id) {
1365 goto err_no_cmd;
1366 }
1367 }
1368
1369 if (!update_slave)
1370 goto err_no_cmd;
1371
1372 /* Actually set the qids for the slave */
1373 update_slave->queue_id = qid;
1374
1375 out:
1376 return ret;
1377
1378 err_no_cmd:
1379 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1380 ret = -EPERM;
1381 goto out;
1382
1383 }
1384
1385 static int bond_option_slaves_set(struct bonding *bond,
1386 const struct bond_opt_value *newval)
1387 {
1388 char command[IFNAMSIZ + 1] = { 0, };
1389 struct net_device *dev;
1390 char *ifname;
1391 int ret;
1392
1393 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1394 ifname = command + 1;
1395 if ((strlen(command) <= 1) ||
1396 (command[0] != '+' && command[0] != '-') ||
1397 !dev_valid_name(ifname))
1398 goto err_no_cmd;
1399
1400 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1401 if (!dev) {
1402 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1403 ifname);
1404 ret = -ENODEV;
1405 goto out;
1406 }
1407
1408 switch (command[0]) {
1409 case '+':
1410 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1411 ret = bond_enslave(bond->dev, dev, NULL);
1412 break;
1413
1414 case '-':
1415 slave_dbg(bond->dev, dev, "Releasing interface\n");
1416 ret = bond_release(bond->dev, dev);
1417 break;
1418
1419 default:
1420 /* should not run here. */
1421 goto err_no_cmd;
1422 }
1423
1424 out:
1425 return ret;
1426
1427 err_no_cmd:
1428 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1429 ret = -EPERM;
1430 goto out;
1431 }
1432
1433 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1434 const struct bond_opt_value *newval)
1435 {
1436 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1437 newval->string, newval->value);
1438 bond->params.tlb_dynamic_lb = newval->value;
1439
1440 return 0;
1441 }
1442
1443 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1444 const struct bond_opt_value *newval)
1445 {
1446 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1447 newval->value);
1448
1449 bond->params.ad_actor_sys_prio = newval->value;
1450 bond_3ad_update_ad_actor_settings(bond);
1451
1452 return 0;
1453 }
1454
1455 static int bond_option_ad_actor_system_set(struct bonding *bond,
1456 const struct bond_opt_value *newval)
1457 {
1458 u8 macaddr[ETH_ALEN];
1459 u8 *mac;
1460
1461 if (newval->string) {
1462 if (!mac_pton(newval->string, macaddr))
1463 goto err;
1464 mac = macaddr;
1465 } else {
1466 mac = (u8 *)&newval->value;
1467 }
1468
1469 if (!is_valid_ether_addr(mac))
1470 goto err;
1471
1472 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1473 ether_addr_copy(bond->params.ad_actor_system, mac);
1474 bond_3ad_update_ad_actor_settings(bond);
1475
1476 return 0;
1477
1478 err:
1479 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1480 return -EINVAL;
1481 }
1482
1483 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1484 const struct bond_opt_value *newval)
1485 {
1486 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1487 newval->value);
1488
1489 bond->params.ad_user_port_key = newval->value;
1490 return 0;
1491 }
Linux with added FPC-III support