Merge branches 'arm/rockchip', 'arm/exynos', 'arm/smmu', 'x86/vt-d', 'x86/amd', ...
[sfrench/cifs-2.6.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
74
75 static const struct bond_opt_value bond_mode_tbl[] = {
76         { "balance-rr",    BOND_MODE_ROUNDROBIN,   BOND_VALFLAG_DEFAULT},
77         { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
78         { "balance-xor",   BOND_MODE_XOR,          0},
79         { "broadcast",     BOND_MODE_BROADCAST,    0},
80         { "802.3ad",       BOND_MODE_8023AD,       0},
81         { "balance-tlb",   BOND_MODE_TLB,          0},
82         { "balance-alb",   BOND_MODE_ALB,          0},
83         { NULL,            -1,                     0},
84 };
85
86 static const struct bond_opt_value bond_pps_tbl[] = {
87         { "default", 1,         BOND_VALFLAG_DEFAULT},
88         { "maxval",  USHRT_MAX, BOND_VALFLAG_MAX},
89         { NULL,      -1,        0},
90 };
91
92 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
93         { "layer2",   BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
94         { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
95         { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
96         { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
97         { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
98         { NULL,       -1,                       0},
99 };
100
101 static const struct bond_opt_value bond_arp_validate_tbl[] = {
102         { "none",               BOND_ARP_VALIDATE_NONE,         BOND_VALFLAG_DEFAULT},
103         { "active",             BOND_ARP_VALIDATE_ACTIVE,       0},
104         { "backup",             BOND_ARP_VALIDATE_BACKUP,       0},
105         { "all",                BOND_ARP_VALIDATE_ALL,          0},
106         { "filter",             BOND_ARP_FILTER,                0},
107         { "filter_active",      BOND_ARP_FILTER_ACTIVE,         0},
108         { "filter_backup",      BOND_ARP_FILTER_BACKUP,         0},
109         { NULL,                 -1,                             0},
110 };
111
112 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
113         { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
114         { "all", BOND_ARP_TARGETS_ALL, 0},
115         { NULL,  -1,                   0},
116 };
117
118 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
119         { "none",   BOND_FOM_NONE,   BOND_VALFLAG_DEFAULT},
120         { "active", BOND_FOM_ACTIVE, 0},
121         { "follow", BOND_FOM_FOLLOW, 0},
122         { NULL,     -1,              0},
123 };
124
125 static const struct bond_opt_value bond_intmax_tbl[] = {
126         { "off",     0,       BOND_VALFLAG_DEFAULT},
127         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
128         { NULL,      -1,      0}
129 };
130
131 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
132         { "slow", AD_LACP_SLOW, 0},
133         { "fast", AD_LACP_FAST, 0},
134         { NULL,   -1,           0},
135 };
136
137 static const struct bond_opt_value bond_ad_select_tbl[] = {
138         { "stable",    BOND_AD_STABLE,    BOND_VALFLAG_DEFAULT},
139         { "bandwidth", BOND_AD_BANDWIDTH, 0},
140         { "count",     BOND_AD_COUNT,     0},
141         { NULL,        -1,                0},
142 };
143
144 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
145         { "off",     0,   0},
146         { "maxval",  255, BOND_VALFLAG_MAX},
147         { "default", 1,   BOND_VALFLAG_DEFAULT},
148         { NULL,      -1,  0}
149 };
150
151 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
152         { "always",  BOND_PRI_RESELECT_ALWAYS,  BOND_VALFLAG_DEFAULT},
153         { "better",  BOND_PRI_RESELECT_BETTER,  0},
154         { "failure", BOND_PRI_RESELECT_FAILURE, 0},
155         { NULL,      -1},
156 };
157
158 static const struct bond_opt_value bond_use_carrier_tbl[] = {
159         { "off", 0,  0},
160         { "on",  1,  BOND_VALFLAG_DEFAULT},
161         { NULL,  -1, 0}
162 };
163
164 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
165         { "off", 0,  BOND_VALFLAG_DEFAULT},
166         { "on",  1,  0},
167         { NULL,  -1, 0}
168 };
169
170 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
171         { "off",     0,   0},
172         { "maxval",  255, BOND_VALFLAG_MAX},
173         { "default", 1,   BOND_VALFLAG_DEFAULT},
174         { NULL,      -1,  0}
175 };
176
177 static const struct bond_opt_value bond_lp_interval_tbl[] = {
178         { "minval",  1,       BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
179         { "maxval",  INT_MAX, BOND_VALFLAG_MAX},
180         { NULL,      -1,      0},
181 };
182
183 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
184         { "off", 0,  0},
185         { "on",  1,  BOND_VALFLAG_DEFAULT},
186         { NULL,  -1, 0}
187 };
188
189 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
190         [BOND_OPT_MODE] = {
191                 .id = BOND_OPT_MODE,
192                 .name = "mode",
193                 .desc = "bond device mode",
194                 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
195                 .values = bond_mode_tbl,
196                 .set = bond_option_mode_set
197         },
198         [BOND_OPT_PACKETS_PER_SLAVE] = {
199                 .id = BOND_OPT_PACKETS_PER_SLAVE,
200                 .name = "packets_per_slave",
201                 .desc = "Packets to send per slave in RR mode",
202                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
203                 .values = bond_pps_tbl,
204                 .set = bond_option_pps_set
205         },
206         [BOND_OPT_XMIT_HASH] = {
207                 .id = BOND_OPT_XMIT_HASH,
208                 .name = "xmit_hash_policy",
209                 .desc = "balance-xor, 802.3ad, and tlb hashing method",
210                 .values = bond_xmit_hashtype_tbl,
211                 .set = bond_option_xmit_hash_policy_set
212         },
213         [BOND_OPT_ARP_VALIDATE] = {
214                 .id = BOND_OPT_ARP_VALIDATE,
215                 .name = "arp_validate",
216                 .desc = "validate src/dst of ARP probes",
217                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
218                                BIT(BOND_MODE_ALB),
219                 .values = bond_arp_validate_tbl,
220                 .set = bond_option_arp_validate_set
221         },
222         [BOND_OPT_ARP_ALL_TARGETS] = {
223                 .id = BOND_OPT_ARP_ALL_TARGETS,
224                 .name = "arp_all_targets",
225                 .desc = "fail on any/all arp targets timeout",
226                 .values = bond_arp_all_targets_tbl,
227                 .set = bond_option_arp_all_targets_set
228         },
229         [BOND_OPT_FAIL_OVER_MAC] = {
230                 .id = BOND_OPT_FAIL_OVER_MAC,
231                 .name = "fail_over_mac",
232                 .desc = "For active-backup, do not set all slaves to the same MAC",
233                 .flags = BOND_OPTFLAG_NOSLAVES,
234                 .values = bond_fail_over_mac_tbl,
235                 .set = bond_option_fail_over_mac_set
236         },
237         [BOND_OPT_ARP_INTERVAL] = {
238                 .id = BOND_OPT_ARP_INTERVAL,
239                 .name = "arp_interval",
240                 .desc = "arp interval in milliseconds",
241                 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
242                                BIT(BOND_MODE_ALB),
243                 .values = bond_intmax_tbl,
244                 .set = bond_option_arp_interval_set
245         },
246         [BOND_OPT_ARP_TARGETS] = {
247                 .id = BOND_OPT_ARP_TARGETS,
248                 .name = "arp_ip_target",
249                 .desc = "arp targets in n.n.n.n form",
250                 .flags = BOND_OPTFLAG_RAWVAL,
251                 .set = bond_option_arp_ip_targets_set
252         },
253         [BOND_OPT_DOWNDELAY] = {
254                 .id = BOND_OPT_DOWNDELAY,
255                 .name = "downdelay",
256                 .desc = "Delay before considering link down, in milliseconds",
257                 .values = bond_intmax_tbl,
258                 .set = bond_option_downdelay_set
259         },
260         [BOND_OPT_UPDELAY] = {
261                 .id = BOND_OPT_UPDELAY,
262                 .name = "updelay",
263                 .desc = "Delay before considering link up, in milliseconds",
264                 .values = bond_intmax_tbl,
265                 .set = bond_option_updelay_set
266         },
267         [BOND_OPT_LACP_RATE] = {
268                 .id = BOND_OPT_LACP_RATE,
269                 .name = "lacp_rate",
270                 .desc = "LACPDU tx rate to request from 802.3ad partner",
271                 .flags = BOND_OPTFLAG_IFDOWN,
272                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
273                 .values = bond_lacp_rate_tbl,
274                 .set = bond_option_lacp_rate_set
275         },
276         [BOND_OPT_MINLINKS] = {
277                 .id = BOND_OPT_MINLINKS,
278                 .name = "min_links",
279                 .desc = "Minimum number of available links before turning on carrier",
280                 .values = bond_intmax_tbl,
281                 .set = bond_option_min_links_set
282         },
283         [BOND_OPT_AD_SELECT] = {
284                 .id = BOND_OPT_AD_SELECT,
285                 .name = "ad_select",
286                 .desc = "803.ad aggregation selection logic",
287                 .flags = BOND_OPTFLAG_IFDOWN,
288                 .values = bond_ad_select_tbl,
289                 .set = bond_option_ad_select_set
290         },
291         [BOND_OPT_NUM_PEER_NOTIF] = {
292                 .id = BOND_OPT_NUM_PEER_NOTIF,
293                 .name = "num_unsol_na",
294                 .desc = "Number of peer notifications to send on failover event",
295                 .values = bond_num_peer_notif_tbl,
296                 .set = bond_option_num_peer_notif_set
297         },
298         [BOND_OPT_MIIMON] = {
299                 .id = BOND_OPT_MIIMON,
300                 .name = "miimon",
301                 .desc = "Link check interval in milliseconds",
302                 .values = bond_intmax_tbl,
303                 .set = bond_option_miimon_set
304         },
305         [BOND_OPT_PRIMARY] = {
306                 .id = BOND_OPT_PRIMARY,
307                 .name = "primary",
308                 .desc = "Primary network device to use",
309                 .flags = BOND_OPTFLAG_RAWVAL,
310                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
311                                                 BIT(BOND_MODE_TLB) |
312                                                 BIT(BOND_MODE_ALB)),
313                 .set = bond_option_primary_set
314         },
315         [BOND_OPT_PRIMARY_RESELECT] = {
316                 .id = BOND_OPT_PRIMARY_RESELECT,
317                 .name = "primary_reselect",
318                 .desc = "Reselect primary slave once it comes up",
319                 .values = bond_primary_reselect_tbl,
320                 .set = bond_option_primary_reselect_set
321         },
322         [BOND_OPT_USE_CARRIER] = {
323                 .id = BOND_OPT_USE_CARRIER,
324                 .name = "use_carrier",
325                 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
326                 .values = bond_use_carrier_tbl,
327                 .set = bond_option_use_carrier_set
328         },
329         [BOND_OPT_ACTIVE_SLAVE] = {
330                 .id = BOND_OPT_ACTIVE_SLAVE,
331                 .name = "active_slave",
332                 .desc = "Currently active slave",
333                 .flags = BOND_OPTFLAG_RAWVAL,
334                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
335                                                 BIT(BOND_MODE_TLB) |
336                                                 BIT(BOND_MODE_ALB)),
337                 .set = bond_option_active_slave_set
338         },
339         [BOND_OPT_QUEUE_ID] = {
340                 .id = BOND_OPT_QUEUE_ID,
341                 .name = "queue_id",
342                 .desc = "Set queue id of a slave",
343                 .flags = BOND_OPTFLAG_RAWVAL,
344                 .set = bond_option_queue_id_set
345         },
346         [BOND_OPT_ALL_SLAVES_ACTIVE] = {
347                 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
348                 .name = "all_slaves_active",
349                 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
350                 .values = bond_all_slaves_active_tbl,
351                 .set = bond_option_all_slaves_active_set
352         },
353         [BOND_OPT_RESEND_IGMP] = {
354                 .id = BOND_OPT_RESEND_IGMP,
355                 .name = "resend_igmp",
356                 .desc = "Number of IGMP membership reports to send on link failure",
357                 .values = bond_resend_igmp_tbl,
358                 .set = bond_option_resend_igmp_set
359         },
360         [BOND_OPT_LP_INTERVAL] = {
361                 .id = BOND_OPT_LP_INTERVAL,
362                 .name = "lp_interval",
363                 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
364                 .values = bond_lp_interval_tbl,
365                 .set = bond_option_lp_interval_set
366         },
367         [BOND_OPT_SLAVES] = {
368                 .id = BOND_OPT_SLAVES,
369                 .name = "slaves",
370                 .desc = "Slave membership management",
371                 .flags = BOND_OPTFLAG_RAWVAL,
372                 .set = bond_option_slaves_set
373         },
374         [BOND_OPT_TLB_DYNAMIC_LB] = {
375                 .id = BOND_OPT_TLB_DYNAMIC_LB,
376                 .name = "tlb_dynamic_lb",
377                 .desc = "Enable dynamic flow shuffling",
378                 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
379                 .values = bond_tlb_dynamic_lb_tbl,
380                 .flags = BOND_OPTFLAG_IFDOWN,
381                 .set = bond_option_tlb_dynamic_lb_set,
382         }
383 };
384
385 /* Searches for an option by name */
386 const struct bond_option *bond_opt_get_by_name(const char *name)
387 {
388         const struct bond_option *opt;
389         int option;
390
391         for (option = 0; option < BOND_OPT_LAST; option++) {
392                 opt = bond_opt_get(option);
393                 if (opt && !strcmp(opt->name, name))
394                         return opt;
395         }
396
397         return NULL;
398 }
399
400 /* Searches for a value in opt's values[] table */
401 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
402 {
403         const struct bond_option *opt;
404         int i;
405
406         opt = bond_opt_get(option);
407         if (WARN_ON(!opt))
408                 return NULL;
409         for (i = 0; opt->values && opt->values[i].string; i++)
410                 if (opt->values[i].value == val)
411                         return &opt->values[i];
412
413         return NULL;
414 }
415
416 /* Searches for a value in opt's values[] table which matches the flagmask */
417 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
418                                                  u32 flagmask)
419 {
420         int i;
421
422         for (i = 0; opt->values && opt->values[i].string; i++)
423                 if (opt->values[i].flags & flagmask)
424                         return &opt->values[i];
425
426         return NULL;
427 }
428
429 /* If maxval is missing then there's no range to check. In case minval is
430  * missing then it's considered to be 0.
431  */
432 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
433 {
434         const struct bond_opt_value *minval, *maxval;
435
436         minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
437         maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
438         if (!maxval || (minval && val < minval->value) || val > maxval->value)
439                 return false;
440
441         return true;
442 }
443
444 /**
445  * bond_opt_parse - parse option value
446  * @opt: the option to parse against
447  * @val: value to parse
448  *
449  * This function tries to extract the value from @val and check if it's
450  * a possible match for the option and returns NULL if a match isn't found,
451  * or the struct_opt_value that matched. It also strips the new line from
452  * @val->string if it's present.
453  */
454 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
455                                             struct bond_opt_value *val)
456 {
457         char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
458         const struct bond_opt_value *tbl;
459         const struct bond_opt_value *ret = NULL;
460         bool checkval;
461         int i, rv;
462
463         /* No parsing if the option wants a raw val */
464         if (opt->flags & BOND_OPTFLAG_RAWVAL)
465                 return val;
466
467         tbl = opt->values;
468         if (!tbl)
469                 goto out;
470
471         /* ULLONG_MAX is used to bypass string processing */
472         checkval = val->value != ULLONG_MAX;
473         if (!checkval) {
474                 if (!val->string)
475                         goto out;
476                 p = strchr(val->string, '\n');
477                 if (p)
478                         *p = '\0';
479                 for (p = val->string; *p; p++)
480                         if (!(isdigit(*p) || isspace(*p)))
481                                 break;
482                 /* The following code extracts the string to match or the value
483                  * and sets checkval appropriately
484                  */
485                 if (*p) {
486                         rv = sscanf(val->string, "%32s", valstr);
487                 } else {
488                         rv = sscanf(val->string, "%llu", &val->value);
489                         checkval = true;
490                 }
491                 if (!rv)
492                         goto out;
493         }
494
495         for (i = 0; tbl[i].string; i++) {
496                 /* Check for exact match */
497                 if (checkval) {
498                         if (val->value == tbl[i].value)
499                                 ret = &tbl[i];
500                 } else {
501                         if (!strcmp(valstr, "default") &&
502                             (tbl[i].flags & BOND_VALFLAG_DEFAULT))
503                                 ret = &tbl[i];
504
505                         if (!strcmp(valstr, tbl[i].string))
506                                 ret = &tbl[i];
507                 }
508                 /* Found an exact match */
509                 if (ret)
510                         goto out;
511         }
512         /* Possible range match */
513         if (checkval && bond_opt_check_range(opt, val->value))
514                 ret = val;
515 out:
516         return ret;
517 }
518
519 /* Check opt's dependencies against bond mode and currently set options */
520 static int bond_opt_check_deps(struct bonding *bond,
521                                const struct bond_option *opt)
522 {
523         struct bond_params *params = &bond->params;
524
525         if (test_bit(params->mode, &opt->unsuppmodes))
526                 return -EACCES;
527         if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
528                 return -ENOTEMPTY;
529         if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
530                 return -EBUSY;
531
532         return 0;
533 }
534
535 static void bond_opt_dep_print(struct bonding *bond,
536                                const struct bond_option *opt)
537 {
538         const struct bond_opt_value *modeval;
539         struct bond_params *params;
540
541         params = &bond->params;
542         modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
543         if (test_bit(params->mode, &opt->unsuppmodes))
544                 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
545                            opt->name, modeval->string, modeval->value);
546 }
547
548 static void bond_opt_error_interpret(struct bonding *bond,
549                                      const struct bond_option *opt,
550                                      int error, const struct bond_opt_value *val)
551 {
552         const struct bond_opt_value *minval, *maxval;
553         char *p;
554
555         switch (error) {
556         case -EINVAL:
557                 if (val) {
558                         if (val->string) {
559                                 /* sometimes RAWVAL opts may have new lines */
560                                 p = strchr(val->string, '\n');
561                                 if (p)
562                                         *p = '\0';
563                                 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
564                                            opt->name, val->string);
565                         } else {
566                                 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
567                                            opt->name, val->value);
568                         }
569                 }
570                 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
571                 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
572                 if (!maxval)
573                         break;
574                 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
575                            opt->name, minval ? minval->value : 0, maxval->value);
576                 break;
577         case -EACCES:
578                 bond_opt_dep_print(bond, opt);
579                 break;
580         case -ENOTEMPTY:
581                 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
582                            opt->name);
583                 break;
584         case -EBUSY:
585                 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
586                            opt->name);
587                 break;
588         default:
589                 break;
590         }
591 }
592
593 /**
594  * __bond_opt_set - set a bonding option
595  * @bond: target bond device
596  * @option: option to set
597  * @val: value to set it to
598  *
599  * This function is used to change the bond's option value, it can be
600  * used for both enabling/changing an option and for disabling it. RTNL lock
601  * must be obtained before calling this function.
602  */
603 int __bond_opt_set(struct bonding *bond,
604                    unsigned int option, struct bond_opt_value *val)
605 {
606         const struct bond_opt_value *retval = NULL;
607         const struct bond_option *opt;
608         int ret = -ENOENT;
609
610         ASSERT_RTNL();
611
612         opt = bond_opt_get(option);
613         if (WARN_ON(!val) || WARN_ON(!opt))
614                 goto out;
615         ret = bond_opt_check_deps(bond, opt);
616         if (ret)
617                 goto out;
618         retval = bond_opt_parse(opt, val);
619         if (!retval) {
620                 ret = -EINVAL;
621                 goto out;
622         }
623         ret = opt->set(bond, retval);
624 out:
625         if (ret)
626                 bond_opt_error_interpret(bond, opt, ret, val);
627         else if (bond->dev->reg_state == NETREG_REGISTERED)
628                 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
629
630         return ret;
631 }
632
633 /**
634  * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
635  * @bond: target bond device
636  * @option: option to set
637  * @buf: value to set it to
638  *
639  * This function tries to acquire RTNL without blocking and if successful
640  * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
641  */
642 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
643 {
644         struct bond_opt_value optval;
645         int ret;
646
647         if (!rtnl_trylock())
648                 return restart_syscall();
649         bond_opt_initstr(&optval, buf);
650         ret = __bond_opt_set(bond, option, &optval);
651         rtnl_unlock();
652
653         return ret;
654 }
655
656 /**
657  * bond_opt_get - get a pointer to an option
658  * @option: option for which to return a pointer
659  *
660  * This function checks if option is valid and if so returns a pointer
661  * to its entry in the bond_opts[] option array.
662  */
663 const struct bond_option *bond_opt_get(unsigned int option)
664 {
665         if (!BOND_OPT_VALID(option))
666                 return NULL;
667
668         return &bond_opts[option];
669 }
670
671 static int bond_option_mode_set(struct bonding *bond,
672                                 const struct bond_opt_value *newval)
673 {
674         if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
675                 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
676                             newval->string);
677                 /* disable arp monitoring */
678                 bond->params.arp_interval = 0;
679                 /* set miimon to default value */
680                 bond->params.miimon = BOND_DEFAULT_MIIMON;
681                 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
682                             bond->params.miimon);
683         }
684
685         /* don't cache arp_validate between modes */
686         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
687         bond->params.mode = newval->value;
688
689         return 0;
690 }
691
692 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
693                                                          struct slave *slave)
694 {
695         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
696 }
697
698 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
699 {
700         struct slave *slave = rcu_dereference(bond->curr_active_slave);
701
702         return __bond_option_active_slave_get(bond, slave);
703 }
704
705 static int bond_option_active_slave_set(struct bonding *bond,
706                                         const struct bond_opt_value *newval)
707 {
708         char ifname[IFNAMSIZ] = { 0, };
709         struct net_device *slave_dev;
710         int ret = 0;
711
712         sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
713         if (!strlen(ifname) || newval->string[0] == '\n') {
714                 slave_dev = NULL;
715         } else {
716                 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
717                 if (!slave_dev)
718                         return -ENODEV;
719         }
720
721         if (slave_dev) {
722                 if (!netif_is_bond_slave(slave_dev)) {
723                         netdev_err(bond->dev, "Device %s is not bonding slave\n",
724                                    slave_dev->name);
725                         return -EINVAL;
726                 }
727
728                 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
729                         netdev_err(bond->dev, "Device %s is not our slave\n",
730                                    slave_dev->name);
731                         return -EINVAL;
732                 }
733         }
734
735         block_netpoll_tx();
736         /* check to see if we are clearing active */
737         if (!slave_dev) {
738                 netdev_info(bond->dev, "Clearing current active slave\n");
739                 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
740                 bond_select_active_slave(bond);
741         } else {
742                 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
743                 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
744
745                 BUG_ON(!new_active);
746
747                 if (new_active == old_active) {
748                         /* do nothing */
749                         netdev_info(bond->dev, "%s is already the current active slave\n",
750                                     new_active->dev->name);
751                 } else {
752                         if (old_active && (new_active->link == BOND_LINK_UP) &&
753                             bond_slave_is_up(new_active)) {
754                                 netdev_info(bond->dev, "Setting %s as active slave\n",
755                                             new_active->dev->name);
756                                 bond_change_active_slave(bond, new_active);
757                         } else {
758                                 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
759                                            new_active->dev->name,
760                                            new_active->dev->name);
761                                 ret = -EINVAL;
762                         }
763                 }
764         }
765         unblock_netpoll_tx();
766
767         return ret;
768 }
769
770 /* There are two tricky bits here.  First, if MII monitoring is activated, then
771  * we must disable ARP monitoring.  Second, if the timer isn't running, we must
772  * start it.
773  */
774 static int bond_option_miimon_set(struct bonding *bond,
775                                   const struct bond_opt_value *newval)
776 {
777         netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
778                     newval->value);
779         bond->params.miimon = newval->value;
780         if (bond->params.updelay)
781                 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
782                         bond->params.updelay * bond->params.miimon);
783         if (bond->params.downdelay)
784                 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
785                             bond->params.downdelay * bond->params.miimon);
786         if (newval->value && bond->params.arp_interval) {
787                 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
788                 bond->params.arp_interval = 0;
789                 if (bond->params.arp_validate)
790                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
791         }
792         if (bond->dev->flags & IFF_UP) {
793                 /* If the interface is up, we may need to fire off
794                  * the MII timer. If the interface is down, the
795                  * timer will get fired off when the open function
796                  * is called.
797                  */
798                 if (!newval->value) {
799                         cancel_delayed_work_sync(&bond->mii_work);
800                 } else {
801                         cancel_delayed_work_sync(&bond->arp_work);
802                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
803                 }
804         }
805
806         return 0;
807 }
808
809 /* Set up and down delays. These must be multiples of the
810  * MII monitoring value, and are stored internally as the multiplier.
811  * Thus, we must translate to MS for the real world.
812  */
813 static int bond_option_updelay_set(struct bonding *bond,
814                                    const struct bond_opt_value *newval)
815 {
816         int value = newval->value;
817
818         if (!bond->params.miimon) {
819                 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
820                 return -EPERM;
821         }
822         if ((value % bond->params.miimon) != 0) {
823                 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
824                             value, bond->params.miimon,
825                             (value / bond->params.miimon) *
826                             bond->params.miimon);
827         }
828         bond->params.updelay = value / bond->params.miimon;
829         netdev_info(bond->dev, "Setting up delay to %d\n",
830                     bond->params.updelay * bond->params.miimon);
831
832         return 0;
833 }
834
835 static int bond_option_downdelay_set(struct bonding *bond,
836                                      const struct bond_opt_value *newval)
837 {
838         int value = newval->value;
839
840         if (!bond->params.miimon) {
841                 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
842                 return -EPERM;
843         }
844         if ((value % bond->params.miimon) != 0) {
845                 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
846                             value, bond->params.miimon,
847                             (value / bond->params.miimon) *
848                             bond->params.miimon);
849         }
850         bond->params.downdelay = value / bond->params.miimon;
851         netdev_info(bond->dev, "Setting down delay to %d\n",
852                     bond->params.downdelay * bond->params.miimon);
853
854         return 0;
855 }
856
857 static int bond_option_use_carrier_set(struct bonding *bond,
858                                        const struct bond_opt_value *newval)
859 {
860         netdev_info(bond->dev, "Setting use_carrier to %llu\n",
861                     newval->value);
862         bond->params.use_carrier = newval->value;
863
864         return 0;
865 }
866
867 /* There are two tricky bits here.  First, if ARP monitoring is activated, then
868  * we must disable MII monitoring.  Second, if the ARP timer isn't running,
869  * we must start it.
870  */
871 static int bond_option_arp_interval_set(struct bonding *bond,
872                                         const struct bond_opt_value *newval)
873 {
874         netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
875                     newval->value);
876         bond->params.arp_interval = newval->value;
877         if (newval->value) {
878                 if (bond->params.miimon) {
879                         netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
880                         bond->params.miimon = 0;
881                 }
882                 if (!bond->params.arp_targets[0])
883                         netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
884         }
885         if (bond->dev->flags & IFF_UP) {
886                 /* If the interface is up, we may need to fire off
887                  * the ARP timer.  If the interface is down, the
888                  * timer will get fired off when the open function
889                  * is called.
890                  */
891                 if (!newval->value) {
892                         if (bond->params.arp_validate)
893                                 bond->recv_probe = NULL;
894                         cancel_delayed_work_sync(&bond->arp_work);
895                 } else {
896                         /* arp_validate can be set only in active-backup mode */
897                         bond->recv_probe = bond_arp_rcv;
898                         cancel_delayed_work_sync(&bond->mii_work);
899                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
900                 }
901         }
902
903         return 0;
904 }
905
906 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
907                                             __be32 target,
908                                             unsigned long last_rx)
909 {
910         __be32 *targets = bond->params.arp_targets;
911         struct list_head *iter;
912         struct slave *slave;
913
914         if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
915                 bond_for_each_slave(bond, slave, iter)
916                         slave->target_last_arp_rx[slot] = last_rx;
917                 targets[slot] = target;
918         }
919 }
920
921 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
922 {
923         __be32 *targets = bond->params.arp_targets;
924         int ind;
925
926         if (!bond_is_ip_target_ok(target)) {
927                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
928                            &target);
929                 return -EINVAL;
930         }
931
932         if (bond_get_targets_ip(targets, target) != -1) { /* dup */
933                 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
934                            &target);
935                 return -EINVAL;
936         }
937
938         ind = bond_get_targets_ip(targets, 0); /* first free slot */
939         if (ind == -1) {
940                 netdev_err(bond->dev, "ARP target table is full!\n");
941                 return -EINVAL;
942         }
943
944         netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
945
946         _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
947
948         return 0;
949 }
950
951 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
952 {
953         return _bond_option_arp_ip_target_add(bond, target);
954 }
955
956 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
957 {
958         __be32 *targets = bond->params.arp_targets;
959         struct list_head *iter;
960         struct slave *slave;
961         unsigned long *targets_rx;
962         int ind, i;
963
964         if (!bond_is_ip_target_ok(target)) {
965                 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
966                            &target);
967                 return -EINVAL;
968         }
969
970         ind = bond_get_targets_ip(targets, target);
971         if (ind == -1) {
972                 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
973                            &target);
974                 return -EINVAL;
975         }
976
977         if (ind == 0 && !targets[1] && bond->params.arp_interval)
978                 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
979
980         netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
981
982         bond_for_each_slave(bond, slave, iter) {
983                 targets_rx = slave->target_last_arp_rx;
984                 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
985                         targets_rx[i] = targets_rx[i+1];
986                 targets_rx[i] = 0;
987         }
988         for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
989                 targets[i] = targets[i+1];
990         targets[i] = 0;
991
992         return 0;
993 }
994
995 void bond_option_arp_ip_targets_clear(struct bonding *bond)
996 {
997         int i;
998
999         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1000                 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1001 }
1002
1003 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1004                                           const struct bond_opt_value *newval)
1005 {
1006         int ret = -EPERM;
1007         __be32 target;
1008
1009         if (newval->string) {
1010                 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1011                         netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1012                                    &target);
1013                         return ret;
1014                 }
1015                 if (newval->string[0] == '+')
1016                         ret = bond_option_arp_ip_target_add(bond, target);
1017                 else if (newval->string[0] == '-')
1018                         ret = bond_option_arp_ip_target_rem(bond, target);
1019                 else
1020                         netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1021         } else {
1022                 target = newval->value;
1023                 ret = bond_option_arp_ip_target_add(bond, target);
1024         }
1025
1026         return ret;
1027 }
1028
1029 static int bond_option_arp_validate_set(struct bonding *bond,
1030                                         const struct bond_opt_value *newval)
1031 {
1032         netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1033                     newval->string, newval->value);
1034
1035         if (bond->dev->flags & IFF_UP) {
1036                 if (!newval->value)
1037                         bond->recv_probe = NULL;
1038                 else if (bond->params.arp_interval)
1039                         bond->recv_probe = bond_arp_rcv;
1040         }
1041         bond->params.arp_validate = newval->value;
1042
1043         return 0;
1044 }
1045
1046 static int bond_option_arp_all_targets_set(struct bonding *bond,
1047                                            const struct bond_opt_value *newval)
1048 {
1049         netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1050                     newval->string, newval->value);
1051         bond->params.arp_all_targets = newval->value;
1052
1053         return 0;
1054 }
1055
1056 static int bond_option_primary_set(struct bonding *bond,
1057                                    const struct bond_opt_value *newval)
1058 {
1059         char *p, *primary = newval->string;
1060         struct list_head *iter;
1061         struct slave *slave;
1062
1063         block_netpoll_tx();
1064
1065         p = strchr(primary, '\n');
1066         if (p)
1067                 *p = '\0';
1068         /* check to see if we are clearing primary */
1069         if (!strlen(primary)) {
1070                 netdev_info(bond->dev, "Setting primary slave to None\n");
1071                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1072                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1073                 bond_select_active_slave(bond);
1074                 goto out;
1075         }
1076
1077         bond_for_each_slave(bond, slave, iter) {
1078                 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1079                         netdev_info(bond->dev, "Setting %s as primary slave\n",
1080                                     slave->dev->name);
1081                         rcu_assign_pointer(bond->primary_slave, slave);
1082                         strcpy(bond->params.primary, slave->dev->name);
1083                         bond_select_active_slave(bond);
1084                         goto out;
1085                 }
1086         }
1087
1088         if (rtnl_dereference(bond->primary_slave)) {
1089                 netdev_info(bond->dev, "Setting primary slave to None\n");
1090                 RCU_INIT_POINTER(bond->primary_slave, NULL);
1091                 bond_select_active_slave(bond);
1092         }
1093         strncpy(bond->params.primary, primary, IFNAMSIZ);
1094         bond->params.primary[IFNAMSIZ - 1] = 0;
1095
1096         netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1097                     primary, bond->dev->name);
1098
1099 out:
1100         unblock_netpoll_tx();
1101
1102         return 0;
1103 }
1104
1105 static int bond_option_primary_reselect_set(struct bonding *bond,
1106                                             const struct bond_opt_value *newval)
1107 {
1108         netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1109                     newval->string, newval->value);
1110         bond->params.primary_reselect = newval->value;
1111
1112         block_netpoll_tx();
1113         bond_select_active_slave(bond);
1114         unblock_netpoll_tx();
1115
1116         return 0;
1117 }
1118
1119 static int bond_option_fail_over_mac_set(struct bonding *bond,
1120                                          const struct bond_opt_value *newval)
1121 {
1122         netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1123                     newval->string, newval->value);
1124         bond->params.fail_over_mac = newval->value;
1125
1126         return 0;
1127 }
1128
1129 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1130                                             const struct bond_opt_value *newval)
1131 {
1132         netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1133                     newval->string, newval->value);
1134         bond->params.xmit_policy = newval->value;
1135
1136         return 0;
1137 }
1138
1139 static int bond_option_resend_igmp_set(struct bonding *bond,
1140                                        const struct bond_opt_value *newval)
1141 {
1142         netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1143                     newval->value);
1144         bond->params.resend_igmp = newval->value;
1145
1146         return 0;
1147 }
1148
1149 static int bond_option_num_peer_notif_set(struct bonding *bond,
1150                                    const struct bond_opt_value *newval)
1151 {
1152         bond->params.num_peer_notif = newval->value;
1153
1154         return 0;
1155 }
1156
1157 static int bond_option_all_slaves_active_set(struct bonding *bond,
1158                                              const struct bond_opt_value *newval)
1159 {
1160         struct list_head *iter;
1161         struct slave *slave;
1162
1163         if (newval->value == bond->params.all_slaves_active)
1164                 return 0;
1165         bond->params.all_slaves_active = newval->value;
1166         bond_for_each_slave(bond, slave, iter) {
1167                 if (!bond_is_active_slave(slave)) {
1168                         if (newval->value)
1169                                 slave->inactive = 0;
1170                         else
1171                                 slave->inactive = 1;
1172                 }
1173         }
1174
1175         return 0;
1176 }
1177
1178 static int bond_option_min_links_set(struct bonding *bond,
1179                                      const struct bond_opt_value *newval)
1180 {
1181         netdev_info(bond->dev, "Setting min links value to %llu\n",
1182                     newval->value);
1183         bond->params.min_links = newval->value;
1184         bond_set_carrier(bond);
1185
1186         return 0;
1187 }
1188
1189 static int bond_option_lp_interval_set(struct bonding *bond,
1190                                        const struct bond_opt_value *newval)
1191 {
1192         bond->params.lp_interval = newval->value;
1193
1194         return 0;
1195 }
1196
1197 static int bond_option_pps_set(struct bonding *bond,
1198                                const struct bond_opt_value *newval)
1199 {
1200         bond->params.packets_per_slave = newval->value;
1201         if (newval->value > 0) {
1202                 bond->params.reciprocal_packets_per_slave =
1203                         reciprocal_value(newval->value);
1204         } else {
1205                 /* reciprocal_packets_per_slave is unused if
1206                  * packets_per_slave is 0 or 1, just initialize it
1207                  */
1208                 bond->params.reciprocal_packets_per_slave =
1209                         (struct reciprocal_value) { 0 };
1210         }
1211
1212         return 0;
1213 }
1214
1215 static int bond_option_lacp_rate_set(struct bonding *bond,
1216                                      const struct bond_opt_value *newval)
1217 {
1218         netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1219                     newval->string, newval->value);
1220         bond->params.lacp_fast = newval->value;
1221         bond_3ad_update_lacp_rate(bond);
1222
1223         return 0;
1224 }
1225
1226 static int bond_option_ad_select_set(struct bonding *bond,
1227                                      const struct bond_opt_value *newval)
1228 {
1229         netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1230                     newval->string, newval->value);
1231         bond->params.ad_select = newval->value;
1232
1233         return 0;
1234 }
1235
1236 static int bond_option_queue_id_set(struct bonding *bond,
1237                                     const struct bond_opt_value *newval)
1238 {
1239         struct slave *slave, *update_slave;
1240         struct net_device *sdev;
1241         struct list_head *iter;
1242         char *delim;
1243         int ret = 0;
1244         u16 qid;
1245
1246         /* delim will point to queue id if successful */
1247         delim = strchr(newval->string, ':');
1248         if (!delim)
1249                 goto err_no_cmd;
1250
1251         /* Terminate string that points to device name and bump it
1252          * up one, so we can read the queue id there.
1253          */
1254         *delim = '\0';
1255         if (sscanf(++delim, "%hd\n", &qid) != 1)
1256                 goto err_no_cmd;
1257
1258         /* Check buffer length, valid ifname and queue id */
1259         if (!dev_valid_name(newval->string) ||
1260             qid > bond->dev->real_num_tx_queues)
1261                 goto err_no_cmd;
1262
1263         /* Get the pointer to that interface if it exists */
1264         sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1265         if (!sdev)
1266                 goto err_no_cmd;
1267
1268         /* Search for thes slave and check for duplicate qids */
1269         update_slave = NULL;
1270         bond_for_each_slave(bond, slave, iter) {
1271                 if (sdev == slave->dev)
1272                         /* We don't need to check the matching
1273                          * slave for dups, since we're overwriting it
1274                          */
1275                         update_slave = slave;
1276                 else if (qid && qid == slave->queue_id) {
1277                         goto err_no_cmd;
1278                 }
1279         }
1280
1281         if (!update_slave)
1282                 goto err_no_cmd;
1283
1284         /* Actually set the qids for the slave */
1285         update_slave->queue_id = qid;
1286
1287 out:
1288         return ret;
1289
1290 err_no_cmd:
1291         netdev_info(bond->dev, "invalid input for queue_id set\n");
1292         ret = -EPERM;
1293         goto out;
1294
1295 }
1296
1297 static int bond_option_slaves_set(struct bonding *bond,
1298                                   const struct bond_opt_value *newval)
1299 {
1300         char command[IFNAMSIZ + 1] = { 0, };
1301         struct net_device *dev;
1302         char *ifname;
1303         int ret;
1304
1305         sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1306         ifname = command + 1;
1307         if ((strlen(command) <= 1) ||
1308             !dev_valid_name(ifname))
1309                 goto err_no_cmd;
1310
1311         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1312         if (!dev) {
1313                 netdev_info(bond->dev, "interface %s does not exist!\n",
1314                             ifname);
1315                 ret = -ENODEV;
1316                 goto out;
1317         }
1318
1319         switch (command[0]) {
1320         case '+':
1321                 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1322                 ret = bond_enslave(bond->dev, dev);
1323                 break;
1324
1325         case '-':
1326                 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1327                 ret = bond_release(bond->dev, dev);
1328                 break;
1329
1330         default:
1331                 goto err_no_cmd;
1332         }
1333
1334 out:
1335         return ret;
1336
1337 err_no_cmd:
1338         netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1339         ret = -EPERM;
1340         goto out;
1341 }
1342
1343 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1344                                           const struct bond_opt_value *newval)
1345 {
1346         netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1347                     newval->string, newval->value);
1348         bond->params.tlb_dynamic_lb = newval->value;
1349
1350         return 0;
1351 }