/
bridge.c
1308 lines (1077 loc) · 31.1 KB
/
bridge.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* SPDX-License-Identifier: LGPL-2.1-only */
/*
* Copyright (c) 2010-2013 Thomas Graf <tgraf@suug.ch>
*/
/**
* @ingroup link
* @defgroup bridge Bridging
*
* @details
* @{
*/
#include "nl-default.h"
#include <linux/if_bridge.h>
#include <netlink/netlink.h>
#include <netlink/attr.h>
#include <netlink/route/rtnl.h>
#include <netlink/route/link/bridge.h>
#include "nl-route.h"
#include "link-api.h"
#include "nl-priv-dynamic-core/nl-core.h"
#include "nl-priv-static-route/nl-priv-static-route.h"
#define VLAN_VID_MASK 0x0fff /* VLAN Identifier */
/** @cond SKIP */
#define BRIDGE_ATTR_PORT_STATE (1 << 0)
#define BRIDGE_ATTR_PRIORITY (1 << 1)
#define BRIDGE_ATTR_COST (1 << 2)
#define BRIDGE_ATTR_FLAGS (1 << 3)
#define BRIDGE_ATTR_PORT_VLAN (1 << 4)
#define BRIDGE_ATTR_HWMODE (1 << 5)
#define BRIDGE_ATTR_CONFIG_MODE (1 << 6)
#define PRIV_FLAG_NEW_ATTRS (1 << 0)
struct bridge_data
{
uint8_t b_port_state;
uint8_t b_priv_flags; /* internal flags */
uint16_t b_hwmode;
uint16_t b_priority;
uint16_t b_config_mode;
uint32_t b_cost;
uint32_t b_flags;
uint32_t b_flags_mask;
uint32_t ce_mask; /* HACK to support attr macros */
struct rtnl_link_bridge_vlan vlan_info;
};
static void set_bit(unsigned nr, uint32_t *addr)
{
if (nr < RTNL_LINK_BRIDGE_VLAN_BITMAP_MAX)
addr[nr / 32] |= (((uint32_t) 1) << (nr % 32));
}
static void unset_bit(unsigned nr, uint32_t *addr)
{
if (nr < RTNL_LINK_BRIDGE_VLAN_BITMAP_MAX)
addr[nr / 32] &= ~(((uint32_t) 1) << (nr % 32));
}
static bool vlan_id_untagged(struct rtnl_link_bridge_vlan *vlan_info, uint16_t vid)
{
uint32_t mask, bit;
_nl_assert(vid / 32u < ARRAY_SIZE(vlan_info->untagged_bitmap));
mask = vlan_info->untagged_bitmap[vid / 32];
bit = (((uint32_t) 1) << vid % 32);
return mask & bit;
}
static int find_next_bit(int i, uint32_t x)
{
int j;
if (i >= 32)
return -1;
/* find first bit */
if (i < 0)
return __builtin_ffs(x);
/* mask off prior finds to get next */
j = __builtin_ffs(x >> i);
return j ? j + i : 0;
}
static struct rtnl_link_af_ops bridge_ops;
#define IS_BRIDGE_LINK_ASSERT(link) \
if (!rtnl_link_is_bridge(link)) { \
APPBUG("A function was expecting a link object of type bridge."); \
return -NLE_OPNOTSUPP; \
}
static inline struct bridge_data *bridge_data(struct rtnl_link *link)
{
return rtnl_link_af_data(link, &bridge_ops);
}
static void *bridge_alloc(struct rtnl_link *link)
{
return calloc(1, sizeof(struct bridge_data));
}
static void *bridge_clone(struct rtnl_link *link, void *data)
{
struct bridge_data *bd;
if ((bd = bridge_alloc(link)))
memcpy(bd, data, sizeof(*bd));
return bd;
}
static void bridge_free(struct rtnl_link *link, void *data)
{
free(data);
}
static struct nla_policy br_attrs_policy[IFLA_BRPORT_MAX+1] = {
[IFLA_BRPORT_STATE] = { .type = NLA_U8 },
[IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
[IFLA_BRPORT_COST] = { .type = NLA_U32 },
[IFLA_BRPORT_MODE] = { .type = NLA_U8 },
[IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
[IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
[IFLA_BRPORT_FAST_LEAVE] = { .type = NLA_U8 },
[IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
[IFLA_BRPORT_LEARNING_SYNC] = { .type = NLA_U8 },
[IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
};
static void check_flag(struct rtnl_link *link, struct nlattr *attrs[],
int type, int flag)
{
if (attrs[type] && nla_get_u8(attrs[type]))
rtnl_link_bridge_set_flags(link, flag);
}
static int bridge_parse_protinfo(struct rtnl_link *link, struct nlattr *attr,
void *data)
{
struct bridge_data *bd = data;
struct nlattr *br_attrs[IFLA_BRPORT_MAX+1];
int err;
/* Backwards compatibility */
if (!nla_is_nested(attr)) {
if (nla_len(attr) < 1)
return -NLE_RANGE;
bd->b_port_state = nla_get_u8(attr);
bd->ce_mask |= BRIDGE_ATTR_PORT_STATE;
return 0;
}
if ((err = nla_parse_nested(br_attrs, IFLA_BRPORT_MAX, attr,
br_attrs_policy)) < 0)
return err;
bd->b_priv_flags |= PRIV_FLAG_NEW_ATTRS;
if (br_attrs[IFLA_BRPORT_STATE]) {
bd->b_port_state = nla_get_u8(br_attrs[IFLA_BRPORT_STATE]);
bd->ce_mask |= BRIDGE_ATTR_PORT_STATE;
}
if (br_attrs[IFLA_BRPORT_PRIORITY]) {
bd->b_priority = nla_get_u16(br_attrs[IFLA_BRPORT_PRIORITY]);
bd->ce_mask |= BRIDGE_ATTR_PRIORITY;
}
if (br_attrs[IFLA_BRPORT_COST]) {
bd->b_cost = nla_get_u32(br_attrs[IFLA_BRPORT_COST]);
bd->ce_mask |= BRIDGE_ATTR_COST;
}
check_flag(link, br_attrs, IFLA_BRPORT_MODE, RTNL_BRIDGE_HAIRPIN_MODE);
check_flag(link, br_attrs, IFLA_BRPORT_GUARD, RTNL_BRIDGE_BPDU_GUARD);
check_flag(link, br_attrs, IFLA_BRPORT_PROTECT, RTNL_BRIDGE_ROOT_BLOCK);
check_flag(link, br_attrs, IFLA_BRPORT_FAST_LEAVE, RTNL_BRIDGE_FAST_LEAVE);
check_flag(link, br_attrs, IFLA_BRPORT_UNICAST_FLOOD,
RTNL_BRIDGE_UNICAST_FLOOD);
check_flag(link, br_attrs, IFLA_BRPORT_LEARNING, RTNL_BRIDGE_LEARNING);
check_flag(link, br_attrs, IFLA_BRPORT_LEARNING_SYNC,
RTNL_BRIDGE_LEARNING_SYNC);
return 0;
}
static int bridge_parse_af_full(struct rtnl_link *link, struct nlattr *attr_full,
void *data)
{
struct bridge_data *bd = data;
struct bridge_vlan_info *vinfo = NULL;
uint16_t vid_range_start = 0;
uint16_t vid_range_flags = -1;
struct nlattr *attr;
int remaining;
nla_for_each_nested(attr, attr_full, remaining) {
if (nla_type(attr) == IFLA_BRIDGE_MODE) {
bd->b_hwmode = nla_get_u16(attr);
bd->ce_mask |= BRIDGE_ATTR_HWMODE;
continue;
} else if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
continue;
if (nla_len(attr) != sizeof(struct bridge_vlan_info))
return -EINVAL;
vinfo = nla_data(attr);
if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
return -EINVAL;
if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
vid_range_start = vinfo->vid;
vid_range_flags = (vinfo->flags ^ BRIDGE_VLAN_INFO_RANGE_BEGIN);
continue;
}
if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END) {
/* sanity check the range flags */
if (vid_range_flags != (vinfo->flags ^ BRIDGE_VLAN_INFO_RANGE_END)) {
NL_DBG(1, "VLAN range flags differ; can not handle it.\n");
return -EINVAL;
}
} else {
vid_range_start = vinfo->vid;
}
for (; vid_range_start <= vinfo->vid; vid_range_start++) {
if (vinfo->flags & BRIDGE_VLAN_INFO_PVID)
bd->vlan_info.pvid = vinfo->vid;
if (vinfo->flags & BRIDGE_VLAN_INFO_UNTAGGED)
set_bit(vid_range_start, bd->vlan_info.untagged_bitmap);
set_bit(vid_range_start, bd->vlan_info.vlan_bitmap);
bd->ce_mask |= BRIDGE_ATTR_PORT_VLAN;
}
vid_range_flags = -1;
}
return 0;
}
int _nl_bridge_fill_vlan_info(struct nl_msg *msg, struct rtnl_link_bridge_vlan * vlan_info)
{
struct bridge_vlan_info vinfo;
int i = -1, j, k;
int start = -1, prev = -1;
int done;
bool untagged = false;
for (k = 0; k < RTNL_LINK_BRIDGE_VLAN_BITMAP_LEN; k++)
{
int base_bit;
uint32_t a = vlan_info->vlan_bitmap[k];
base_bit = k * 32;
i = -1;
done = 0;
while (!done)
{
j = find_next_bit(i, a);
if (j > 0)
{
/* Skip if id equal to pvid */
if (vlan_info->pvid != 0 && j - 1 + base_bit == vlan_info->pvid)
goto nxt;
/* first hit of any bit */
if (start < 0 && prev < 0)
{
start = prev = j - 1 + base_bit;
/* Start range attribute */
untagged = vlan_id_untagged(vlan_info,start);
vinfo.flags = BRIDGE_VLAN_INFO_RANGE_BEGIN;
vinfo.flags |= untagged ? BRIDGE_VLAN_INFO_UNTAGGED : 0;
vinfo.vid = start;
goto nxt;
}
/* this bit is a continuation of prior bits */
if (j - 2 + base_bit == prev)
{
prev++;
/* Hit end of untagged/tagged range */
if (untagged != vlan_id_untagged(vlan_info,prev))
{
/* put vlan into attributes */
if (start == prev-1)
{
/* only 1 vid in range */
vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
NLA_PUT(msg,IFLA_BRIDGE_VLAN_INFO,sizeof(vinfo),&vinfo);
}
else
{
/* end of untagged/tagged range */
NLA_PUT(msg,IFLA_BRIDGE_VLAN_INFO,sizeof(vinfo),&vinfo);
vinfo.flags = BRIDGE_VLAN_INFO_RANGE_END;
vinfo.flags |= untagged ? BRIDGE_VLAN_INFO_UNTAGGED : 0;
vinfo.vid = prev-1;
NLA_PUT(msg,IFLA_BRIDGE_VLAN_INFO,sizeof(vinfo),&vinfo);
}
/* start of new range */
untagged = !untagged;
vinfo.flags = BRIDGE_VLAN_INFO_RANGE_BEGIN;
vinfo.flags |= untagged ? BRIDGE_VLAN_INFO_UNTAGGED : 0;
vinfo.vid = prev;
}
goto nxt;
}
}
else
done = 1;
if (start >= 0)
{
if (done && k < RTNL_LINK_BRIDGE_VLAN_BITMAP_LEN - 1)
break;
if (vinfo.flags & BRIDGE_VLAN_INFO_RANGE_BEGIN && start != prev)
{
NLA_PUT(msg,IFLA_BRIDGE_VLAN_INFO,sizeof(vinfo),&vinfo);
vinfo.flags = BRIDGE_VLAN_INFO_RANGE_END;
vinfo.flags |= untagged ? BRIDGE_VLAN_INFO_UNTAGGED : 0;
vinfo.vid = prev;
NLA_PUT(msg,IFLA_BRIDGE_VLAN_INFO,sizeof(vinfo),&vinfo);
}
else if (start == prev)
{
vinfo.flags = untagged ? BRIDGE_VLAN_INFO_UNTAGGED : 0;
vinfo.vid = start;
NLA_PUT(msg,IFLA_BRIDGE_VLAN_INFO,sizeof(vinfo),&vinfo);
}
if (done)
break;
}
if (j > 0)
{
start = prev = j - 1 + base_bit;
untagged = vlan_id_untagged(vlan_info,start);
vinfo.flags = BRIDGE_VLAN_INFO_RANGE_BEGIN;
vinfo.flags |= untagged ? BRIDGE_VLAN_INFO_UNTAGGED : 0;
vinfo.vid = start;
}
nxt:
i = j;
}
}
if (vlan_info->pvid != 0)
{
untagged = vlan_id_untagged(vlan_info,vlan_info->pvid);
vinfo.flags = BRIDGE_VLAN_INFO_PVID;
vinfo.flags |= untagged ? BRIDGE_VLAN_INFO_UNTAGGED : 0;
vinfo.vid = vlan_info->pvid;
NLA_PUT(msg,IFLA_BRIDGE_VLAN_INFO,sizeof(vinfo),&vinfo);
}
return 0;
nla_put_failure:
return -NLE_MSGSIZE;
}
static int bridge_fill_af(struct rtnl_link *link, struct nl_msg *msg,
void *data)
{
struct bridge_data *bd = data;
if (bd->ce_mask & BRIDGE_ATTR_HWMODE)
{
NLA_PUT_U16(msg, IFLA_BRIDGE_MODE, bd->b_hwmode);
bd->b_config_mode = BRIDGE_FLAGS_SELF;
bd->ce_mask |= BRIDGE_ATTR_CONFIG_MODE;
}
if (bd->ce_mask & BRIDGE_ATTR_CONFIG_MODE)
NLA_PUT_U16(msg, IFLA_BRIDGE_FLAGS, bd->b_config_mode);
if (bd->ce_mask & BRIDGE_ATTR_PORT_VLAN) {
if (_nl_bridge_fill_vlan_info(msg, &bd->vlan_info)) {
goto nla_put_failure;
}
}
return 0;
nla_put_failure:
return -NLE_MSGSIZE;
}
static int bridge_fill_pi(struct rtnl_link *link, struct nl_msg *msg,
void *data)
{
struct bridge_data *bd = data;
if (bd->ce_mask & BRIDGE_ATTR_FLAGS) {
if (bd->b_flags_mask & RTNL_BRIDGE_BPDU_GUARD) {
NLA_PUT_U8(msg, IFLA_BRPORT_GUARD,
bd->b_flags & RTNL_BRIDGE_BPDU_GUARD);
}
if (bd->b_flags_mask & RTNL_BRIDGE_HAIRPIN_MODE) {
NLA_PUT_U8(msg, IFLA_BRPORT_MODE,
bd->b_flags & RTNL_BRIDGE_HAIRPIN_MODE);
}
if (bd->b_flags_mask & RTNL_BRIDGE_FAST_LEAVE) {
NLA_PUT_U8(msg, IFLA_BRPORT_FAST_LEAVE,
bd->b_flags & RTNL_BRIDGE_FAST_LEAVE);
}
if (bd->b_flags_mask & RTNL_BRIDGE_ROOT_BLOCK) {
NLA_PUT_U8(msg, IFLA_BRPORT_PROTECT,
bd->b_flags & RTNL_BRIDGE_ROOT_BLOCK);
}
if (bd->b_flags_mask & RTNL_BRIDGE_UNICAST_FLOOD) {
NLA_PUT_U8(msg, IFLA_BRPORT_UNICAST_FLOOD,
bd->b_flags & RTNL_BRIDGE_UNICAST_FLOOD);
}
if (bd->b_flags_mask & RTNL_BRIDGE_LEARNING) {
NLA_PUT_U8(msg, IFLA_BRPORT_LEARNING,
bd->b_flags & RTNL_BRIDGE_LEARNING);
}
if (bd->b_flags_mask & RTNL_BRIDGE_LEARNING_SYNC) {
NLA_PUT_U8(msg, IFLA_BRPORT_LEARNING_SYNC,
bd->b_flags & RTNL_BRIDGE_LEARNING_SYNC);
}
}
if (bd->ce_mask & BRIDGE_ATTR_COST)
NLA_PUT_U32(msg, IFLA_BRPORT_COST, bd->b_cost);
if (bd->ce_mask & BRIDGE_ATTR_PRIORITY)
NLA_PUT_U16(msg, IFLA_BRPORT_PRIORITY, bd->b_priority);
if (bd->ce_mask & BRIDGE_ATTR_PORT_STATE)
NLA_PUT_U8(msg, IFLA_BRPORT_STATE, bd->b_port_state);
return 0;
nla_put_failure:
return -NLE_MSGSIZE;
}
static int bridge_override_rtm(struct rtnl_link *link) {
struct bridge_data *bd;
if (!rtnl_link_is_bridge(link))
return 0;
bd = bridge_data(link);
if (bd->ce_mask & BRIDGE_ATTR_FLAGS)
return 1;
return 0;
}
static int bridge_get_af(struct nl_msg *msg, uint32_t *ext_filter_mask)
{
*ext_filter_mask |= RTEXT_FILTER_BRVLAN;
return 0;
}
static void dump_bitmap(struct nl_dump_params *p, const uint32_t *b)
{
int i = -1, j, k;
int start = -1, prev = -1;
int done, found = 0;
for (k = 0; k < RTNL_LINK_BRIDGE_VLAN_BITMAP_LEN; k++) {
int base_bit;
uint32_t a = b[k];
base_bit = k * 32;
i = -1;
done = 0;
while (!done) {
j = find_next_bit(i, a);
if (j > 0) {
/* first hit of any bit */
if (start < 0 && prev < 0) {
start = prev = j - 1 + base_bit;
goto next;
}
/* this bit is a continuation of prior bits */
if (j - 2 + base_bit == prev) {
prev++;
goto next;
}
} else
done = 1;
if (start >= 0) {
found++;
if (done && k < RTNL_LINK_BRIDGE_VLAN_BITMAP_LEN - 1)
break;
nl_dump(p, " %d", start);
if (start != prev)
nl_dump(p, "-%d", prev);
if (done)
break;
}
if (j > 0)
start = prev = j - 1 + base_bit;
next:
i = j;
}
}
if (!found)
nl_dump(p, " <none>");
return;
}
static void rtnl_link_bridge_dump_vlans(struct nl_dump_params *p,
struct bridge_data *bd)
{
nl_dump(p, "pvid %u", bd->vlan_info.pvid);
nl_dump(p, " all vlans:");
dump_bitmap(p, bd->vlan_info.vlan_bitmap);
nl_dump(p, " untagged vlans:");
dump_bitmap(p, bd->vlan_info.untagged_bitmap);
}
static void bridge_dump_details(struct rtnl_link *link,
struct nl_dump_params *p, void *data)
{
struct bridge_data *bd = data;
nl_dump_line(p, " bridge: ");
if (bd->ce_mask & BRIDGE_ATTR_PORT_STATE)
nl_dump(p, "port-state %u ", bd->b_port_state);
if (bd->ce_mask & BRIDGE_ATTR_PRIORITY)
nl_dump(p, "prio %u ", bd->b_priority);
if (bd->ce_mask & BRIDGE_ATTR_COST)
nl_dump(p, "cost %u ", bd->b_cost);
if (bd->ce_mask & BRIDGE_ATTR_HWMODE) {
char hbuf[32];
rtnl_link_bridge_hwmode2str(bd->b_hwmode, hbuf, sizeof(hbuf));
nl_dump(p, "hwmode %s", hbuf);
}
if (bd->ce_mask & BRIDGE_ATTR_PORT_VLAN)
rtnl_link_bridge_dump_vlans(p, bd);
if (bd->ce_mask & BRIDGE_ATTR_FLAGS) {
char buf[256];
rtnl_link_bridge_flags2str(bd->b_flags & bd->b_flags_mask,
buf, sizeof(buf));
nl_dump(p, "%s", buf);
}
nl_dump(p, "\n");
}
static int bridge_compare(struct rtnl_link *_a, struct rtnl_link *_b,
int family, uint32_t attrs, int flags)
{
struct bridge_data *a = bridge_data(_a);
struct bridge_data *b = bridge_data(_b);
int diff = 0;
#define _DIFF(ATTR, EXPR) ATTR_DIFF(attrs, ATTR, a, b, EXPR)
diff |= _DIFF(BRIDGE_ATTR_PORT_STATE,
a->b_port_state != b->b_port_state);
diff |= _DIFF(BRIDGE_ATTR_PRIORITY, a->b_priority != b->b_priority);
diff |= _DIFF(BRIDGE_ATTR_COST, a->b_cost != b->b_cost);
diff |= _DIFF(BRIDGE_ATTR_PORT_VLAN,
memcmp(&a->vlan_info, &b->vlan_info,
sizeof(struct rtnl_link_bridge_vlan)));
diff |= _DIFF(BRIDGE_ATTR_HWMODE, a->b_hwmode != b->b_hwmode);
diff |= _DIFF(BRIDGE_ATTR_CONFIG_MODE, a->b_config_mode != b->b_config_mode);
if (flags & LOOSE_COMPARISON)
diff |= _DIFF(BRIDGE_ATTR_FLAGS,
(a->b_flags ^ b->b_flags) & b->b_flags_mask);
else
diff |= _DIFF(BRIDGE_ATTR_FLAGS, a->b_flags != b->b_flags);
#undef _DIFF
return diff;
}
/** @endcond */
/**
* Allocate link object of type bridge
*
* @return Allocated link object or NULL.
*/
struct rtnl_link *rtnl_link_bridge_alloc(void)
{
struct rtnl_link *link;
if (!(link = rtnl_link_alloc()))
return NULL;
if (rtnl_link_set_type(link, "bridge") < 0) {
rtnl_link_put(link);
return NULL;
}
return link;
}
/**
* Create a new kernel bridge device
* @arg sk netlink socket
* @arg name name of the bridge device or NULL
*
* Creates a new bridge device in the kernel. If no name is
* provided, the kernel will automatically pick a name of the
* form "type%d" (e.g. bridge0, vlan1, etc.)
*
* @return 0 on success or a negative error code
*/
int rtnl_link_bridge_add(struct nl_sock *sk, const char *name)
{
int err;
struct rtnl_link *link;
if (!(link = rtnl_link_bridge_alloc()))
return -NLE_NOMEM;
if(name)
rtnl_link_set_name(link, name);
err = rtnl_link_add(sk, link, NLM_F_CREATE);
rtnl_link_put(link);
return err;
}
/**
* Check if a link is a bridge
* @arg link Link object
*
* @return 1 if the link is a bridge, 0 otherwise.
*/
int rtnl_link_is_bridge(struct rtnl_link *link)
{
return link->l_family == AF_BRIDGE &&
link->l_af_ops == &bridge_ops;
}
/**
* Check if bridge has extended information
* @arg link Link object of type bridge
*
* Checks if the bridge object has been constructed based on
* information that is only available in newer kernels. This
* affectes the following functions:
* - rtnl_link_bridge_get_cost()
* - rtnl_link_bridge_get_priority()
* - rtnl_link_bridge_get_flags()
*
* @return 1 if extended information is available, otherwise 0 is returned.
*/
int rtnl_link_bridge_has_ext_info(struct rtnl_link *link)
{
struct bridge_data *bd;
if (!rtnl_link_is_bridge(link))
return 0;
bd = bridge_data(link);
return !!(bd->b_priv_flags & PRIV_FLAG_NEW_ATTRS);
}
/**
* Set Spanning Tree Protocol (STP) port state
* @arg link Link object of type bridge
* @arg state New STP port state
*
* The value of state must be one of the following:
* - BR_STATE_DISABLED
* - BR_STATE_LISTENING
* - BR_STATE_LEARNING
* - BR_STATE_FORWARDING
* - BR_STATE_BLOCKING
*
* @see rtnl_link_bridge_get_port_state()
*
* @return 0 on success or a negative error code.
* @retval -NLE_OPNOTSUPP Link is not a bridge
* @retval -NLE_INVAL Invalid state value (0..BR_STATE_BLOCKING)
*/
int rtnl_link_bridge_set_port_state(struct rtnl_link *link, uint8_t state)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
if (state > BR_STATE_BLOCKING)
return -NLE_INVAL;
bd->b_port_state = state;
bd->ce_mask |= BRIDGE_ATTR_PORT_STATE;
return 0;
}
/**
* Get Spanning Tree Protocol (STP) port state
* @arg link Link object of type bridge
*
* @see rtnl_link_bridge_set_port_state()
*
* @return The STP port state or a negative error code.
* @retval -NLE_OPNOTSUPP Link is not a bridge
*/
int rtnl_link_bridge_get_port_state(struct rtnl_link *link)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
return bd->b_port_state;
}
/**
* Set priority
* @arg link Link object of type bridge
* @arg prio Bridge priority
*
* @see rtnl_link_bridge_get_priority()
*
* @return 0 on success or a negative error code.
* @retval -NLE_OPNOTSUPP Link is not a bridge
*/
int rtnl_link_bridge_set_priority(struct rtnl_link *link, uint16_t prio)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
bd->b_priority = prio;
bd->ce_mask |= BRIDGE_ATTR_PRIORITY;
return 0;
}
/**
* Get priority
* @arg link Link object of type bridge
*
* @see rtnl_link_bridge_set_priority()
*
* @return 0 on success or a negative error code.
* @retval -NLE_OPNOTSUPP Link is not a bridge
*/
int rtnl_link_bridge_get_priority(struct rtnl_link *link)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
return bd->b_priority;
}
/**
* Set Spanning Tree Protocol (STP) path cost
* @arg link Link object of type bridge
* @arg cost New STP path cost value
*
* @see rtnl_link_bridge_get_cost()
*
* @return The bridge priority or a negative error code.
* @retval -NLE_OPNOTSUPP Link is not a bridge
*/
int rtnl_link_bridge_set_cost(struct rtnl_link *link, uint32_t cost)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
bd->b_cost = cost;
bd->ce_mask |= BRIDGE_ATTR_COST;
return 0;
}
/**
* Get Spanning Tree Protocol (STP) path cost
* @arg link Link object of type bridge
* @arg cost Pointer to store STP cost value
*
* @see rtnl_link_bridge_set_cost()
*
* @return 0 on success or a negative error code.
* @retval -NLE_OPNOTSUPP Link is not a bridge
* @retval -NLE_INVAL `cost` is not a valid pointer
*/
int rtnl_link_bridge_get_cost(struct rtnl_link *link, uint32_t *cost)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
if (!cost)
return -NLE_INVAL;
*cost = bd->b_cost;
return 0;
}
/**
* Unset flags
* @arg link Link object of type bridge
* @arg flags Bridging flags to unset
*
* @see rtnl_link_bridge_set_flags()
* @see rtnl_link_bridge_get_flags()
*
* @return 0 on success or a negative error code.
* @retval -NLE_OPNOTSUPP Link is not a bridge
*/
int rtnl_link_bridge_unset_flags(struct rtnl_link *link, unsigned int flags)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
bd->b_flags_mask |= flags;
bd->b_flags &= ~flags;
bd->ce_mask |= BRIDGE_ATTR_FLAGS;
return 0;
}
/**
* Set flags
* @arg link Link object of type bridge
* @arg flags Bridging flags to set
*
* Valid flags are:
* - RTNL_BRIDGE_HAIRPIN_MODE
* - RTNL_BRIDGE_BPDU_GUARD
* - RTNL_BRIDGE_ROOT_BLOCK
* - RTNL_BRIDGE_FAST_LEAVE
* - RTNL_BRIDGE_UNICAST_FLOOD
* - RTNL_BRIDGE_LEARNING
* - RTNL_BRIDGE_LEARNING_SYNC
*
* @see rtnl_link_bridge_unset_flags()
* @see rtnl_link_bridge_get_flags()
*
* @return 0 on success or a negative error code.
* @retval -NLE_OPNOTSUPP Link is not a bridge
*/
int rtnl_link_bridge_set_flags(struct rtnl_link *link, unsigned int flags)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
bd->b_flags_mask |= flags;
bd->b_flags |= flags;
bd->ce_mask |= BRIDGE_ATTR_FLAGS;
return 0;
}
/**
* Get flags
* @arg link Link object of type bridge
*
* @see rtnl_link_bridge_set_flags()
* @see rtnl_link_bridge_unset_flags()
*
* @return Flags or a negative error code.
* @retval -NLE_OPNOTSUPP Link is not a bridge
*/
int rtnl_link_bridge_get_flags(struct rtnl_link *link)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
return bd->b_flags;
}
/**
* Set link change type to self
* @arg link Link Object of type bridge
*
* This will set the bridge change flag to self, meaning that changes to
* be applied with this link object will be applied directly to the physical
* device in a bridge instead of the virtual device.
*
* @return 0 on success or negative error code
* @return -NLE_OPNOTSUP Link is not a bridge
*/
int rtnl_link_bridge_set_self(struct rtnl_link *link)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
bd->b_config_mode = BRIDGE_FLAGS_SELF;
bd->ce_mask |= BRIDGE_ATTR_CONFIG_MODE;
return 0;
}
/**
* Set link change type to master
* @arg link Link Object of type bridge
*
* This will set the bridge change flag to master, meaning that changes to
* be applied with this link object will be applied directly to the virtual
* device in a bridge instead of the physical device.
*
* @return 0 on success or negative error code
* @return -NLE_OPNOTSUP Link is not a bridge
*/
int rtnl_link_bridge_set_master(struct rtnl_link *link)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
bd->b_config_mode = BRIDGE_FLAGS_MASTER;
bd->ce_mask |= BRIDGE_ATTR_CONFIG_MODE;
return 0;
}
/**
* Get hardware mode
* @arg link Link object of type bridge
* @arg hwmode Output argument.
*
* @see rtnl_link_bridge_set_hwmode()
*
* @return 0 if hardware mode is present and returned in hwmode
* @return -NLE_NOATTR if hardware mode is not present
* @return -NLE_OPNOTSUP Link is not a bridge
*/
int rtnl_link_bridge_get_hwmode(struct rtnl_link *link, uint16_t *hwmode)
{
struct bridge_data *bd = bridge_data(link);
IS_BRIDGE_LINK_ASSERT(link);
if (!(bd->ce_mask & BRIDGE_ATTR_HWMODE))
return -NLE_NOATTR;
*hwmode = bd->b_hwmode;
return 0;
}
/**
* Set hardware mode
* @arg link Link object of type bridge
* @arg hwmode Hardware mode to set on link
*
* This will set the hardware mode of a link when it supports hardware
* offloads for bridging.
* @see rtnl_link_bridge_get_hwmode()
*
* Valid modes are:
* - RTNL_BRIDGE_HWMODE_VEB
* - RTNL_BRIDGE_HWMODE_VEPA
*
* When setting hardware mode, the change type will be set to self.
* @see rtnl_link_bridge_set_self()
*
* @return 0 on success or negative error code
* @return -NLE_OPNOTSUP Link is not a bridge
* @return -NLE_INVAL when specified hwmode is unsupported.
*/