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[karo-tx-linux.git] / drivers / net / bonding / bond_options.c
1 /*
2  * drivers/net/bond/bond_options.c - bonding options
3  * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
4  * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  */
11
12 #include <linux/errno.h>
13 #include <linux/if.h>
14 #include <linux/netdevice.h>
15 #include <linux/spinlock.h>
16 #include <linux/rcupdate.h>
17 #include <linux/ctype.h>
18 #include <linux/inet.h>
19 #include <net/bonding.h>
20
21 static int bond_option_active_slave_set(struct bonding *bond,
22                                         const struct bond_opt_value *newval);
23 static int bond_option_miimon_set(struct bonding *bond,
24                                   const struct bond_opt_value *newval);
25 static int bond_option_updelay_set(struct bonding *bond,
26                                    const struct bond_opt_value *newval);
27 static int bond_option_downdelay_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)),
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                 .flags = BOND_OPTFLAG_IFDOWN,
406                 .values = bond_ad_actor_sys_prio_tbl,
407                 .set = bond_option_ad_actor_sys_prio_set,
408         },
409         [BOND_OPT_AD_ACTOR_SYSTEM] = {
410                 .id = BOND_OPT_AD_ACTOR_SYSTEM,
411                 .name = "ad_actor_system",
412                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
413                 .flags = BOND_OPTFLAG_RAWVAL | BOND_OPTFLAG_IFDOWN,
414                 .set = bond_option_ad_actor_system_set,
415         },
416         [BOND_OPT_AD_USER_PORT_KEY] = {
417                 .id = BOND_OPT_AD_USER_PORT_KEY,
418                 .name = "ad_user_port_key",
419                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
420                 .flags = BOND_OPTFLAG_IFDOWN,
421                 .values = bond_ad_user_port_key_tbl,
422                 .set = bond_option_ad_user_port_key_set,
423         },
424         [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
425                 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
426                 .name = "num_grat_arp",
427                 .desc = "Number of peer notifications to send on failover event",
428                 .values = bond_num_peer_notif_tbl,
429                 .set = bond_option_num_peer_notif_set
430         }
431 };
432
433 /* Searches for an option by name */
434 const struct bond_option *bond_opt_get_by_name(const char *name)
435 {
436         const struct bond_option *opt;
437         int option;
438
439         for (option = 0; option < BOND_OPT_LAST; option++) {
440                 opt = bond_opt_get(option);
441                 if (opt && !strcmp(opt->name, name))
442                         return opt;
443         }
444
445         return NULL;
446 }
447
448 /* Searches for a value in opt's values[] table */
449 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
450 {
451         const struct bond_option *opt;
452         int i;
453
454         opt = bond_opt_get(option);
455         if (WARN_ON(!opt))
456                 return NULL;
457         for (i = 0; opt->values && opt->values[i].string; i++)
458                 if (opt->values[i].value == val)
459                         return &opt->values[i];
460
461         return NULL;
462 }
463
464 /* Searches for a value in opt's values[] table which matches the flagmask */
465 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
466                                                  u32 flagmask)
467 {
468         int i;
469
470         for (i = 0; opt->values && opt->values[i].string; i++)
471                 if (opt->values[i].flags & flagmask)
472                         return &opt->values[i];
473
474         return NULL;
475 }
476
477 /* If maxval is missing then there's no range to check. In case minval is
478  * missing then it's considered to be 0.
479  */
480 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
481 {
482         const struct bond_opt_value *minval, *maxval;
483
484         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
485         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
486         if (!maxval || (minval && val < minval->value) || val > maxval->value)
487                 return false;
488
489         return true;
490 }
491
492 /**
493  * bond_opt_parse - parse option value
494  * @opt: the option to parse against
495  * @val: value to parse
496  *
497  * This function tries to extract the value from @val and check if it's
498  * a possible match for the option and returns NULL if a match isn't found,
499  * or the struct_opt_value that matched. It also strips the new line from
500  * @val->string if it's present.
501  */
502 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
503                                             struct bond_opt_value *val)
504 {
505         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
506         const struct bond_opt_value *tbl;
507         const struct bond_opt_value *ret = NULL;
508         bool checkval;
509         int i, rv;
510
511         /* No parsing if the option wants a raw val */
512         if (opt->flags & BOND_OPTFLAG_RAWVAL)
513                 return val;
514
515         tbl = opt->values;
516         if (!tbl)
517                 goto out;
518
519         /* ULLONG_MAX is used to bypass string processing */
520         checkval = val->value != ULLONG_MAX;
521         if (!checkval) {
522                 if (!val->string)
523                         goto out;
524                 p = strchr(val->string, '\n');
525                 if (p)
526                         *p = '\0';
527                 for (p = val->string; *p; p++)
528                         if (!(isdigit(*p) || isspace(*p)))
529                                 break;
530                 /* The following code extracts the string to match or the value
531                  * and sets checkval appropriately
532                  */
533                 if (*p) {
534                         rv = sscanf(val->string, "%32s", valstr);
535                 } else {
536                         rv = sscanf(val->string, "%llu", &val->value);
537                         checkval = true;
538                 }
539                 if (!rv)
540                         goto out;
541         }
542
543         for (i = 0; tbl[i].string; i++) {
544                 /* Check for exact match */
545                 if (checkval) {
546                         if (val->value == tbl[i].value)
547                                 ret = &tbl[i];
548                 } else {
549                         if (!strcmp(valstr, "default") &&
550                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
551                                 ret = &tbl[i];
552
553                         if (!strcmp(valstr, tbl[i].string))
554                                 ret = &tbl[i];
555                 }
556                 /* Found an exact match */
557                 if (ret)
558                         goto out;
559         }
560         /* Possible range match */
561         if (checkval && bond_opt_check_range(opt, val->value))
562                 ret = val;
563 out:
564         return ret;
565 }
566
567 /* Check opt's dependencies against bond mode and currently set options */
568 static int bond_opt_check_deps(struct bonding *bond,
569                                const struct bond_option *opt)
570 {
571         struct bond_params *params = &bond->params;
572
573         if (test_bit(params->mode, &opt->unsuppmodes))
574                 return -EACCES;
575         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
576                 return -ENOTEMPTY;
577         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
578                 return -EBUSY;
579
580         return 0;
581 }
582
583 static void bond_opt_dep_print(struct bonding *bond,
584                                const struct bond_option *opt)
585 {
586         const struct bond_opt_value *modeval;
587         struct bond_params *params;
588
589         params = &bond->params;
590         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
591         if (test_bit(params->mode, &opt->unsuppmodes))
592                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
593                            opt->name, modeval->string, modeval->value);
594 }
595
596 static void bond_opt_error_interpret(struct bonding *bond,
597                                      const struct bond_option *opt,
598                                      int error, const struct bond_opt_value *val)
599 {
600         const struct bond_opt_value *minval, *maxval;
601         char *p;
602
603         switch (error) {
604         case -EINVAL:
605                 if (val) {
606                         if (val->string) {
607                                 /* sometimes RAWVAL opts may have new lines */
608                                 p = strchr(val->string, '\n');
609                                 if (p)
610                                         *p = '\0';
611                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
612                                            opt->name, val->string);
613                         } else {
614                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
615                                            opt->name, val->value);
616                         }
617                 }
618                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
619                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
620                 if (!maxval)
621                         break;
622                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
623                            opt->name, minval ? minval->value : 0, maxval->value);
624                 break;
625         case -EACCES:
626                 bond_opt_dep_print(bond, opt);
627                 break;
628         case -ENOTEMPTY:
629                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
630                            opt->name);
631                 break;
632         case -EBUSY:
633                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
634                            opt->name);
635                 break;
636         default:
637                 break;
638         }
639 }
640
641 /**
642  * __bond_opt_set - set a bonding option
643  * @bond: target bond device
644  * @option: option to set
645  * @val: value to set it to
646  *
647  * This function is used to change the bond's option value, it can be
648  * used for both enabling/changing an option and for disabling it. RTNL lock
649  * must be obtained before calling this function.
650  */
651 int __bond_opt_set(struct bonding *bond,
652                    unsigned int option, struct bond_opt_value *val)
653 {
654         const struct bond_opt_value *retval = NULL;
655         const struct bond_option *opt;
656         int ret = -ENOENT;
657
658         ASSERT_RTNL();
659
660         opt = bond_opt_get(option);
661         if (WARN_ON(!val) || WARN_ON(!opt))
662                 goto out;
663         ret = bond_opt_check_deps(bond, opt);
664         if (ret)
665                 goto out;
666         retval = bond_opt_parse(opt, val);
667         if (!retval) {
668                 ret = -EINVAL;
669                 goto out;
670         }
671         ret = opt->set(bond, retval);
672 out:
673         if (ret)
674                 bond_opt_error_interpret(bond, opt, ret, val);
675         else if (bond->dev->reg_state == NETREG_REGISTERED)
676                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
677
678         return ret;
679 }
680
681 /**
682  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
683  * @bond: target bond device
684  * @option: option to set
685  * @buf: value to set it to
686  *
687  * This function tries to acquire RTNL without blocking and if successful
688  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
689  */
690 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
691 {
692         struct bond_opt_value optval;
693         int ret;
694
695         if (!rtnl_trylock())
696                 return restart_syscall();
697         bond_opt_initstr(&optval, buf);
698         ret = __bond_opt_set(bond, option, &optval);
699         rtnl_unlock();
700
701         return ret;
702 }
703
704 /**
705  * bond_opt_get - get a pointer to an option
706  * @option: option for which to return a pointer
707  *
708  * This function checks if option is valid and if so returns a pointer
709  * to its entry in the bond_opts[] option array.
710  */
711 const struct bond_option *bond_opt_get(unsigned int option)
712 {
713         if (!BOND_OPT_VALID(option))
714                 return NULL;
715
716         return &bond_opts[option];
717 }
718
719 static int bond_option_mode_set(struct bonding *bond,
720                                 const struct bond_opt_value *newval)
721 {
722         if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
723                 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
724                             newval->string);
725                 /* disable arp monitoring */
726                 bond->params.arp_interval = 0;
727                 /* set miimon to default value */
728                 bond->params.miimon = BOND_DEFAULT_MIIMON;
729                 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
730                             bond->params.miimon);
731         }
732
733         /* don't cache arp_validate between modes */
734         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
735         bond->params.mode = newval->value;
736
737         return 0;
738 }
739
740 static int bond_option_active_slave_set(struct bonding *bond,
741                                         const struct bond_opt_value *newval)
742 {
743         char ifname[IFNAMSIZ] = { 0, };
744         struct net_device *slave_dev;
745         int ret = 0;
746
747         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
748         if (!strlen(ifname) || newval->string[0] == '\n') {
749                 slave_dev = NULL;
750         } else {
751                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
752                 if (!slave_dev)
753                         return -ENODEV;
754         }
755
756         if (slave_dev) {
757                 if (!netif_is_bond_slave(slave_dev)) {
758                         netdev_err(bond->dev, "Device %s is not bonding slave\n",
759                                    slave_dev->name);
760                         return -EINVAL;
761                 }
762
763                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
764                         netdev_err(bond->dev, "Device %s is not our slave\n",
765                                    slave_dev->name);
766                         return -EINVAL;
767                 }
768         }
769
770         block_netpoll_tx();
771         /* check to see if we are clearing active */
772         if (!slave_dev) {
773                 netdev_info(bond->dev, "Clearing current active slave\n");
774                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
775                 bond_select_active_slave(bond);
776         } else {
777                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
778                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
779
780                 BUG_ON(!new_active);
781
782                 if (new_active == old_active) {
783                         /* do nothing */
784                         netdev_info(bond->dev, "%s is already the current active slave\n",
785                                     new_active->dev->name);
786                 } else {
787                         if (old_active && (new_active->link == BOND_LINK_UP) &&
788                             bond_slave_is_up(new_active)) {
789                                 netdev_info(bond->dev, "Setting %s as active slave\n",
790                                             new_active->dev->name);
791                                 bond_change_active_slave(bond, new_active);
792                         } else {
793                                 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
794                                            new_active->dev->name,
795                                            new_active->dev->name);
796                                 ret = -EINVAL;
797                         }
798                 }
799         }
800         unblock_netpoll_tx();
801
802         return ret;
803 }
804
805 /* There are two tricky bits here.  First, if MII monitoring is activated, then
806  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
807  * start it.
808  */
809 static int bond_option_miimon_set(struct bonding *bond,
810                                   const struct bond_opt_value *newval)
811 {
812         netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
813                     newval->value);
814         bond->params.miimon = newval->value;
815         if (bond->params.updelay)
816                 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
817                         bond->params.updelay * bond->params.miimon);
818         if (bond->params.downdelay)
819                 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
820                             bond->params.downdelay * bond->params.miimon);
821         if (newval->value && bond->params.arp_interval) {
822                 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
823                 bond->params.arp_interval = 0;
824                 if (bond->params.arp_validate)
825                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
826         }
827         if (bond->dev->flags & IFF_UP) {
828                 /* If the interface is up, we may need to fire off
829                  * the MII timer. If the interface is down, the
830                  * timer will get fired off when the open function
831                  * is called.
832                  */
833                 if (!newval->value) {
834                         cancel_delayed_work_sync(&bond->mii_work);
835                 } else {
836                         cancel_delayed_work_sync(&bond->arp_work);
837                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
838                 }
839         }
840
841         return 0;
842 }
843
844 /* Set up and down delays. These must be multiples of the
845  * MII monitoring value, and are stored internally as the multiplier.
846  * Thus, we must translate to MS for the real world.
847  */
848 static int bond_option_updelay_set(struct bonding *bond,
849                                    const struct bond_opt_value *newval)
850 {
851         int value = newval->value;
852
853         if (!bond->params.miimon) {
854                 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
855                 return -EPERM;
856         }
857         if ((value % bond->params.miimon) != 0) {
858                 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
859                             value, bond->params.miimon,
860                             (value / bond->params.miimon) *
861                             bond->params.miimon);
862         }
863         bond->params.updelay = value / bond->params.miimon;
864         netdev_info(bond->dev, "Setting up delay to %d\n",
865                     bond->params.updelay * bond->params.miimon);
866
867         return 0;
868 }
869
870 static int bond_option_downdelay_set(struct bonding *bond,
871                                      const struct bond_opt_value *newval)
872 {
873         int value = newval->value;
874
875         if (!bond->params.miimon) {
876                 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
877                 return -EPERM;
878         }
879         if ((value % bond->params.miimon) != 0) {
880                 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
881                             value, bond->params.miimon,
882                             (value / bond->params.miimon) *
883                             bond->params.miimon);
884         }
885         bond->params.downdelay = value / bond->params.miimon;
886         netdev_info(bond->dev, "Setting down delay to %d\n",
887                     bond->params.downdelay * bond->params.miimon);
888
889         return 0;
890 }
891
892 static int bond_option_use_carrier_set(struct bonding *bond,
893                                        const struct bond_opt_value *newval)
894 {
895         netdev_info(bond->dev, "Setting use_carrier to %llu\n",
896                     newval->value);
897         bond->params.use_carrier = newval->value;
898
899         return 0;
900 }
901
902 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
903  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
904  * we must start it.
905  */
906 static int bond_option_arp_interval_set(struct bonding *bond,
907                                         const struct bond_opt_value *newval)
908 {
909         netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
910                     newval->value);
911         bond->params.arp_interval = newval->value;
912         if (newval->value) {
913                 if (bond->params.miimon) {
914                         netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
915                         bond->params.miimon = 0;
916                 }
917                 if (!bond->params.arp_targets[0])
918                         netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
919         }
920         if (bond->dev->flags & IFF_UP) {
921                 /* If the interface is up, we may need to fire off
922                  * the ARP timer.  If the interface is down, the
923                  * timer will get fired off when the open function
924                  * is called.
925                  */
926                 if (!newval->value) {
927                         if (bond->params.arp_validate)
928                                 bond->recv_probe = NULL;
929                         cancel_delayed_work_sync(&bond->arp_work);
930                 } else {
931                         /* arp_validate can be set only in active-backup mode */
932                         bond->recv_probe = bond_arp_rcv;
933                         cancel_delayed_work_sync(&bond->mii_work);
934                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
935                 }
936         }
937
938         return 0;
939 }
940
941 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
942                                             __be32 target,
943                                             unsigned long last_rx)
944 {
945         __be32 *targets = bond->params.arp_targets;
946         struct list_head *iter;
947         struct slave *slave;
948
949         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
950                 bond_for_each_slave(bond, slave, iter)
951                         slave->target_last_arp_rx[slot] = last_rx;
952                 targets[slot] = target;
953         }
954 }
955
956 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
957 {
958         __be32 *targets = bond->params.arp_targets;
959         int ind;
960
961         if (!bond_is_ip_target_ok(target)) {
962                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
963                            &target);
964                 return -EINVAL;
965         }
966
967         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
968                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
969                            &target);
970                 return -EINVAL;
971         }
972
973         ind = bond_get_targets_ip(targets, 0); /* first free slot */
974         if (ind == -1) {
975                 netdev_err(bond->dev, "ARP target table is full!\n");
976                 return -EINVAL;
977         }
978
979         netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
980
981         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
982
983         return 0;
984 }
985
986 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
987 {
988         return _bond_option_arp_ip_target_add(bond, target);
989 }
990
991 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
992 {
993         __be32 *targets = bond->params.arp_targets;
994         struct list_head *iter;
995         struct slave *slave;
996         unsigned long *targets_rx;
997         int ind, i;
998
999         if (!bond_is_ip_target_ok(target)) {
1000                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1001                            &target);
1002                 return -EINVAL;
1003         }
1004
1005         ind = bond_get_targets_ip(targets, target);
1006         if (ind == -1) {
1007                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1008                            &target);
1009                 return -EINVAL;
1010         }
1011
1012         if (ind == 0 && !targets[1] && bond->params.arp_interval)
1013                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1014
1015         netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
1016
1017         bond_for_each_slave(bond, slave, iter) {
1018                 targets_rx = slave->target_last_arp_rx;
1019                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1020                         targets_rx[i] = targets_rx[i+1];
1021                 targets_rx[i] = 0;
1022         }
1023         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1024                 targets[i] = targets[i+1];
1025         targets[i] = 0;
1026
1027         return 0;
1028 }
1029
1030 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1031 {
1032         int i;
1033
1034         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1035                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1036 }
1037
1038 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1039                                           const struct bond_opt_value *newval)
1040 {
1041         int ret = -EPERM;
1042         __be32 target;
1043
1044         if (newval->string) {
1045                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1046                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1047                                    &target);
1048                         return ret;
1049                 }
1050                 if (newval->string[0] == '+')
1051                         ret = bond_option_arp_ip_target_add(bond, target);
1052                 else if (newval->string[0] == '-')
1053                         ret = bond_option_arp_ip_target_rem(bond, target);
1054                 else
1055                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1056         } else {
1057                 target = newval->value;
1058                 ret = bond_option_arp_ip_target_add(bond, target);
1059         }
1060
1061         return ret;
1062 }
1063
1064 static int bond_option_arp_validate_set(struct bonding *bond,
1065                                         const struct bond_opt_value *newval)
1066 {
1067         netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1068                     newval->string, newval->value);
1069
1070         if (bond->dev->flags & IFF_UP) {
1071                 if (!newval->value)
1072                         bond->recv_probe = NULL;
1073                 else if (bond->params.arp_interval)
1074                         bond->recv_probe = bond_arp_rcv;
1075         }
1076         bond->params.arp_validate = newval->value;
1077
1078         return 0;
1079 }
1080
1081 static int bond_option_arp_all_targets_set(struct bonding *bond,
1082                                            const struct bond_opt_value *newval)
1083 {
1084         netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1085                     newval->string, newval->value);
1086         bond->params.arp_all_targets = newval->value;
1087
1088         return 0;
1089 }
1090
1091 static int bond_option_primary_set(struct bonding *bond,
1092                                    const struct bond_opt_value *newval)
1093 {
1094         char *p, *primary = newval->string;
1095         struct list_head *iter;
1096         struct slave *slave;
1097
1098         block_netpoll_tx();
1099
1100         p = strchr(primary, '\n');
1101         if (p)
1102                 *p = '\0';
1103         /* check to see if we are clearing primary */
1104         if (!strlen(primary)) {
1105                 netdev_info(bond->dev, "Setting primary slave to None\n");
1106                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1107                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1108                 bond_select_active_slave(bond);
1109                 goto out;
1110         }
1111
1112         bond_for_each_slave(bond, slave, iter) {
1113                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1114                         netdev_info(bond->dev, "Setting %s as primary slave\n",
1115                                     slave->dev->name);
1116                         rcu_assign_pointer(bond->primary_slave, slave);
1117                         strcpy(bond->params.primary, slave->dev->name);
1118                         bond_select_active_slave(bond);
1119                         goto out;
1120                 }
1121         }
1122
1123         if (rtnl_dereference(bond->primary_slave)) {
1124                 netdev_info(bond->dev, "Setting primary slave to None\n");
1125                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1126                 bond_select_active_slave(bond);
1127         }
1128         strncpy(bond->params.primary, primary, IFNAMSIZ);
1129         bond->params.primary[IFNAMSIZ - 1] = 0;
1130
1131         netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1132                     primary, bond->dev->name);
1133
1134 out:
1135         unblock_netpoll_tx();
1136
1137         return 0;
1138 }
1139
1140 static int bond_option_primary_reselect_set(struct bonding *bond,
1141                                             const struct bond_opt_value *newval)
1142 {
1143         netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1144                     newval->string, newval->value);
1145         bond->params.primary_reselect = newval->value;
1146
1147         block_netpoll_tx();
1148         bond_select_active_slave(bond);
1149         unblock_netpoll_tx();
1150
1151         return 0;
1152 }
1153
1154 static int bond_option_fail_over_mac_set(struct bonding *bond,
1155                                          const struct bond_opt_value *newval)
1156 {
1157         netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1158                     newval->string, newval->value);
1159         bond->params.fail_over_mac = newval->value;
1160
1161         return 0;
1162 }
1163
1164 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1165                                             const struct bond_opt_value *newval)
1166 {
1167         netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1168                     newval->string, newval->value);
1169         bond->params.xmit_policy = newval->value;
1170
1171         return 0;
1172 }
1173
1174 static int bond_option_resend_igmp_set(struct bonding *bond,
1175                                        const struct bond_opt_value *newval)
1176 {
1177         netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1178                     newval->value);
1179         bond->params.resend_igmp = newval->value;
1180
1181         return 0;
1182 }
1183
1184 static int bond_option_num_peer_notif_set(struct bonding *bond,
1185                                    const struct bond_opt_value *newval)
1186 {
1187         bond->params.num_peer_notif = newval->value;
1188
1189         return 0;
1190 }
1191
1192 static int bond_option_all_slaves_active_set(struct bonding *bond,
1193                                              const struct bond_opt_value *newval)
1194 {
1195         struct list_head *iter;
1196         struct slave *slave;
1197
1198         if (newval->value == bond->params.all_slaves_active)
1199                 return 0;
1200         bond->params.all_slaves_active = newval->value;
1201         bond_for_each_slave(bond, slave, iter) {
1202                 if (!bond_is_active_slave(slave)) {
1203                         if (newval->value)
1204                                 slave->inactive = 0;
1205                         else
1206                                 slave->inactive = 1;
1207                 }
1208         }
1209
1210         return 0;
1211 }
1212
1213 static int bond_option_min_links_set(struct bonding *bond,
1214                                      const struct bond_opt_value *newval)
1215 {
1216         netdev_info(bond->dev, "Setting min links value to %llu\n",
1217                     newval->value);
1218         bond->params.min_links = newval->value;
1219         bond_set_carrier(bond);
1220
1221         return 0;
1222 }
1223
1224 static int bond_option_lp_interval_set(struct bonding *bond,
1225                                        const struct bond_opt_value *newval)
1226 {
1227         bond->params.lp_interval = newval->value;
1228
1229         return 0;
1230 }
1231
1232 static int bond_option_pps_set(struct bonding *bond,
1233                                const struct bond_opt_value *newval)
1234 {
1235         bond->params.packets_per_slave = newval->value;
1236         if (newval->value > 0) {
1237                 bond->params.reciprocal_packets_per_slave =
1238                         reciprocal_value(newval->value);
1239         } else {
1240                 /* reciprocal_packets_per_slave is unused if
1241                  * packets_per_slave is 0 or 1, just initialize it
1242                  */
1243                 bond->params.reciprocal_packets_per_slave =
1244                         (struct reciprocal_value) { 0 };
1245         }
1246
1247         return 0;
1248 }
1249
1250 static int bond_option_lacp_rate_set(struct bonding *bond,
1251                                      const struct bond_opt_value *newval)
1252 {
1253         netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1254                     newval->string, newval->value);
1255         bond->params.lacp_fast = newval->value;
1256         bond_3ad_update_lacp_rate(bond);
1257
1258         return 0;
1259 }
1260
1261 static int bond_option_ad_select_set(struct bonding *bond,
1262                                      const struct bond_opt_value *newval)
1263 {
1264         netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1265                     newval->string, newval->value);
1266         bond->params.ad_select = newval->value;
1267
1268         return 0;
1269 }
1270
1271 static int bond_option_queue_id_set(struct bonding *bond,
1272                                     const struct bond_opt_value *newval)
1273 {
1274         struct slave *slave, *update_slave;
1275         struct net_device *sdev;
1276         struct list_head *iter;
1277         char *delim;
1278         int ret = 0;
1279         u16 qid;
1280
1281         /* delim will point to queue id if successful */
1282         delim = strchr(newval->string, ':');
1283         if (!delim)
1284                 goto err_no_cmd;
1285
1286         /* Terminate string that points to device name and bump it
1287          * up one, so we can read the queue id there.
1288          */
1289         *delim = '\0';
1290         if (sscanf(++delim, "%hd\n", &qid) != 1)
1291                 goto err_no_cmd;
1292
1293         /* Check buffer length, valid ifname and queue id */
1294         if (!dev_valid_name(newval->string) ||
1295             qid > bond->dev->real_num_tx_queues)
1296                 goto err_no_cmd;
1297
1298         /* Get the pointer to that interface if it exists */
1299         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1300         if (!sdev)
1301                 goto err_no_cmd;
1302
1303         /* Search for thes slave and check for duplicate qids */
1304         update_slave = NULL;
1305         bond_for_each_slave(bond, slave, iter) {
1306                 if (sdev == slave->dev)
1307                         /* We don't need to check the matching
1308                          * slave for dups, since we're overwriting it
1309                          */
1310                         update_slave = slave;
1311                 else if (qid && qid == slave->queue_id) {
1312                         goto err_no_cmd;
1313                 }
1314         }
1315
1316         if (!update_slave)
1317                 goto err_no_cmd;
1318
1319         /* Actually set the qids for the slave */
1320         update_slave->queue_id = qid;
1321
1322 out:
1323         return ret;
1324
1325 err_no_cmd:
1326         netdev_info(bond->dev, "invalid input for queue_id set\n");
1327         ret = -EPERM;
1328         goto out;
1329
1330 }
1331
1332 static int bond_option_slaves_set(struct bonding *bond,
1333                                   const struct bond_opt_value *newval)
1334 {
1335         char command[IFNAMSIZ + 1] = { 0, };
1336         struct net_device *dev;
1337         char *ifname;
1338         int ret;
1339
1340         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1341         ifname = command + 1;
1342         if ((strlen(command) <= 1) ||
1343             !dev_valid_name(ifname))
1344                 goto err_no_cmd;
1345
1346         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1347         if (!dev) {
1348                 netdev_info(bond->dev, "interface %s does not exist!\n",
1349                             ifname);
1350                 ret = -ENODEV;
1351                 goto out;
1352         }
1353
1354         switch (command[0]) {
1355         case '+':
1356                 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1357                 ret = bond_enslave(bond->dev, dev);
1358                 break;
1359
1360         case '-':
1361                 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1362                 ret = bond_release(bond->dev, dev);
1363                 break;
1364
1365         default:
1366                 goto err_no_cmd;
1367         }
1368
1369 out:
1370         return ret;
1371
1372 err_no_cmd:
1373         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1374         ret = -EPERM;
1375         goto out;
1376 }
1377
1378 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1379                                           const struct bond_opt_value *newval)
1380 {
1381         netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1382                     newval->string, newval->value);
1383         bond->params.tlb_dynamic_lb = newval->value;
1384
1385         return 0;
1386 }
1387
1388 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1389                                              const struct bond_opt_value *newval)
1390 {
1391         netdev_info(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1392                     newval->value);
1393
1394         bond->params.ad_actor_sys_prio = newval->value;
1395         bond_3ad_update_ad_actor_settings(bond);
1396
1397         return 0;
1398 }
1399
1400 static int bond_option_ad_actor_system_set(struct bonding *bond,
1401                                            const struct bond_opt_value *newval)
1402 {
1403         u8 macaddr[ETH_ALEN];
1404         u8 *mac;
1405         int i;
1406
1407         if (newval->string) {
1408                 i = sscanf(newval->string, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
1409                            &macaddr[0], &macaddr[1], &macaddr[2],
1410                            &macaddr[3], &macaddr[4], &macaddr[5]);
1411                 if (i != ETH_ALEN)
1412                         goto err;
1413                 mac = macaddr;
1414         } else {
1415                 mac = (u8 *)&newval->value;
1416         }
1417
1418         if (!is_valid_ether_addr(mac))
1419                 goto err;
1420
1421         netdev_info(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1422         ether_addr_copy(bond->params.ad_actor_system, mac);
1423         bond_3ad_update_ad_actor_settings(bond);
1424
1425         return 0;
1426
1427 err:
1428         netdev_err(bond->dev, "Invalid MAC address.\n");
1429         return -EINVAL;
1430 }
1431
1432 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1433                                             const struct bond_opt_value *newval)
1434 {
1435         netdev_info(bond->dev, "Setting ad_user_port_key to %llu\n",
1436                     newval->value);
1437
1438         bond->params.ad_user_port_key = newval->value;
1439         return 0;
1440 }