aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/networking/ethtool-netlink.rst
blob: d53bcb31645a4707ed9fd0bacaf912481097f7d6 (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
=============================
Netlink interface for ethtool
=============================


Basic information
=================

Netlink interface for ethtool uses generic netlink family ``ethtool``
(userspace application should use macros ``ETHTOOL_GENL_NAME`` and
``ETHTOOL_GENL_VERSION`` defined in ``<linux/ethtool_netlink.h>`` uapi
header). This family does not use a specific header, all information in
requests and replies is passed using netlink attributes.

The ethtool netlink interface uses extended ACK for error and warning
reporting, userspace application developers are encouraged to make these
messages available to user in a suitable way.

Requests can be divided into three categories: "get" (retrieving information),
"set" (setting parameters) and "action" (invoking an action).

All "set" and "action" type requests require admin privileges
(``CAP_NET_ADMIN`` in the namespace). Most "get" type requests are allowed for
anyone but there are exceptions (where the response contains sensitive
information). In some cases, the request as such is allowed for anyone but
unprivileged users have attributes with sensitive information (e.g.
wake-on-lan password) omitted.


Conventions
===========

Attributes which represent a boolean value usually use NLA_U8 type so that we
can distinguish three states: "on", "off" and "not present" (meaning the
information is not available in "get" requests or value is not to be changed
in "set" requests). For these attributes, the "true" value should be passed as
number 1 but any non-zero value should be understood as "true" by recipient.
In the tables below, "bool" denotes NLA_U8 attributes interpreted in this way.

In the message structure descriptions below, if an attribute name is suffixed
with "+", parent nest can contain multiple attributes of the same type. This
implements an array of entries.


Request header
==============

Each request or reply message contains a nested attribute with common header.
Structure of this header is

  ==============================  ======  =============================
  ``ETHTOOL_A_HEADER_DEV_INDEX``  u32     device ifindex
  ``ETHTOOL_A_HEADER_DEV_NAME``   string  device name
  ``ETHTOOL_A_HEADER_FLAGS``      u32     flags common for all requests
  ==============================  ======  =============================

``ETHTOOL_A_HEADER_DEV_INDEX`` and ``ETHTOOL_A_HEADER_DEV_NAME`` identify the
device message relates to. One of them is sufficient in requests, if both are
used, they must identify the same device. Some requests, e.g. global string
sets, do not require device identification. Most ``GET`` requests also allow
dump requests without device identification to query the same information for
all devices providing it (each device in a separate message).

``ETHTOOL_A_HEADER_FLAGS`` is a bitmap of request flags common for all request
types. The interpretation of these flags is the same for all request types but
the flags may not apply to requests. Recognized flags are:

  =================================  ===================================
  ``ETHTOOL_FLAG_COMPACT_BITSETS``   use compact format bitsets in reply
  ``ETHTOOL_FLAG_OMIT_REPLY``        omit optional reply (_SET and _ACT)
  =================================  ===================================

New request flags should follow the general idea that if the flag is not set,
the behaviour is backward compatible, i.e. requests from old clients not aware
of the flag should be interpreted the way the client expects. A client must
not set flags it does not understand.


Bit sets
========

For short bitmaps of (reasonably) fixed length, standard ``NLA_BITFIELD32``
type is used. For arbitrary length bitmaps, ethtool netlink uses a nested
attribute with contents of one of two forms: compact (two binary bitmaps
representing bit values and mask of affected bits) and bit-by-bit (list of
bits identified by either index or name).

Verbose (bit-by-bit) bitsets allow sending symbolic names for bits together
with their values which saves a round trip (when the bitset is passed in a
request) or at least a second request (when the bitset is in a reply). This is
useful for one shot applications like traditional ethtool command. On the
other hand, long running applications like ethtool monitor (displaying
notifications) or network management daemons may prefer fetching the names
only once and using compact form to save message size. Notifications from
ethtool netlink interface always use compact form for bitsets.

A bitset can represent either a value/mask pair (``ETHTOOL_A_BITSET_NOMASK``
not set) or a single bitmap (``ETHTOOL_A_BITSET_NOMASK`` set). In requests
modifying a bitmap, the former changes the bit set in mask to values set in
value and preserves the rest; the latter sets the bits set in the bitmap and
clears the rest.

Compact form: nested (bitset) atrribute contents:

  ============================  ======  ============================
  ``ETHTOOL_A_BITSET_NOMASK``   flag    no mask, only a list
  ``ETHTOOL_A_BITSET_SIZE``     u32     number of significant bits
  ``ETHTOOL_A_BITSET_VALUE``    binary  bitmap of bit values
  ``ETHTOOL_A_BITSET_MASK``     binary  bitmap of valid bits
  ============================  ======  ============================

Value and mask must have length at least ``ETHTOOL_A_BITSET_SIZE`` bits
rounded up to a multiple of 32 bits. They consist of 32-bit words in host byte
order, words ordered from least significant to most significant (i.e. the same
way as bitmaps are passed with ioctl interface).

For compact form, ``ETHTOOL_A_BITSET_SIZE`` and ``ETHTOOL_A_BITSET_VALUE`` are
mandatory. ``ETHTOOL_A_BITSET_MASK`` attribute is mandatory if
``ETHTOOL_A_BITSET_NOMASK`` is not set (bitset represents a value/mask pair);
if ``ETHTOOL_A_BITSET_NOMASK`` is not set, ``ETHTOOL_A_BITSET_MASK`` is not
allowed (bitset represents a single bitmap.

Kernel bit set length may differ from userspace length if older application is
used on newer kernel or vice versa. If userspace bitmap is longer, an error is
issued only if the request actually tries to set values of some bits not
recognized by kernel.

Bit-by-bit form: nested (bitset) attribute contents:

 +------------------------------------+--------+-----------------------------+
 | ``ETHTOOL_A_BITSET_NOMASK``        | flag   | no mask, only a list        |
 +------------------------------------+--------+-----------------------------+
 | ``ETHTOOL_A_BITSET_SIZE``          | u32    | number of significant bits  |
 +------------------------------------+--------+-----------------------------+
 | ``ETHTOOL_A_BITSET_BITS``          | nested | array of bits               |
 +-+----------------------------------+--------+-----------------------------+
 | | ``ETHTOOL_A_BITSET_BITS_BIT+``   | nested | one bit                     |
 +-+-+--------------------------------+--------+-----------------------------+
 | | | ``ETHTOOL_A_BITSET_BIT_INDEX`` | u32    | bit index (0 for LSB)       |
 +-+-+--------------------------------+--------+-----------------------------+
 | | | ``ETHTOOL_A_BITSET_BIT_NAME``  | string | bit name                    |
 +-+-+--------------------------------+--------+-----------------------------+
 | | | ``ETHTOOL_A_BITSET_BIT_VALUE`` | flag   | present if bit is set       |
 +-+-+--------------------------------+--------+-----------------------------+

Bit size is optional for bit-by-bit form. ``ETHTOOL_A_BITSET_BITS`` nest can
only contain ``ETHTOOL_A_BITSET_BITS_BIT`` attributes but there can be an
arbitrary number of them.  A bit may be identified by its index or by its
name. When used in requests, listed bits are set to 0 or 1 according to
``ETHTOOL_A_BITSET_BIT_VALUE``, the rest is preserved. A request fails if
index exceeds kernel bit length or if name is not recognized.

When ``ETHTOOL_A_BITSET_NOMASK`` flag is present, bitset is interpreted as
a simple bitmap. ``ETHTOOL_A_BITSET_BIT_VALUE`` attributes are not used in
such case. Such bitset represents a bitmap with listed bits set and the rest
zero.

In requests, application can use either form. Form used by kernel in reply is
determined by ``ETHTOOL_FLAG_COMPACT_BITSETS`` flag in flags field of request
header. Semantics of value and mask depends on the attribute.


List of message types
=====================

All constants identifying message types use ``ETHTOOL_CMD_`` prefix and suffix
according to message purpose:

  ==============    ======================================
  ``_GET``          userspace request to retrieve data
  ``_SET``          userspace request to set data
  ``_ACT``          userspace request to perform an action
  ``_GET_REPLY``    kernel reply to a ``GET`` request
  ``_SET_REPLY``    kernel reply to a ``SET`` request
  ``_ACT_REPLY``    kernel reply to an ``ACT`` request
  ``_NTF``          kernel notification
  ==============    ======================================

Userspace to kernel:

  ===================================== ================================
  ``ETHTOOL_MSG_STRSET_GET``            get string set
  ``ETHTOOL_MSG_LINKINFO_GET``          get link settings
  ``ETHTOOL_MSG_LINKINFO_SET``          set link settings
  ``ETHTOOL_MSG_LINKMODES_GET``         get link modes info
  ``ETHTOOL_MSG_LINKMODES_SET``         set link modes info
  ``ETHTOOL_MSG_LINKSTATE_GET``         get link state
  ``ETHTOOL_MSG_DEBUG_GET``             get debugging settings
  ``ETHTOOL_MSG_DEBUG_SET``             set debugging settings
  ``ETHTOOL_MSG_WOL_GET``               get wake-on-lan settings
  ``ETHTOOL_MSG_WOL_SET``               set wake-on-lan settings
  ``ETHTOOL_MSG_FEATURES_GET``          get device features
  ``ETHTOOL_MSG_FEATURES_SET``          set device features
  ``ETHTOOL_MSG_PRIVFLAGS_GET``         get private flags
  ``ETHTOOL_MSG_PRIVFLAGS_SET``         set private flags
  ``ETHTOOL_MSG_RINGS_GET``             get ring sizes
  ``ETHTOOL_MSG_RINGS_SET``             set ring sizes
  ``ETHTOOL_MSG_CHANNELS_GET``          get channel counts
  ``ETHTOOL_MSG_CHANNELS_SET``          set channel counts
  ``ETHTOOL_MSG_COALESCE_GET``          get coalescing parameters
  ``ETHTOOL_MSG_COALESCE_SET``          set coalescing parameters
  ``ETHTOOL_MSG_PAUSE_GET``             get pause parameters
  ``ETHTOOL_MSG_PAUSE_SET``             set pause parameters
  ``ETHTOOL_MSG_EEE_GET``               get EEE settings
  ``ETHTOOL_MSG_EEE_SET``               set EEE settings
  ``ETHTOOL_MSG_TSINFO_GET``		get timestamping info
  ``ETHTOOL_MSG_CABLE_TEST_ACT``        action start cable test
  ``ETHTOOL_MSG_CABLE_TEST_TDR_ACT``    action start raw TDR cable test
  ===================================== ================================

Kernel to userspace:

  ===================================== =================================
  ``ETHTOOL_MSG_STRSET_GET_REPLY``      string set contents
  ``ETHTOOL_MSG_LINKINFO_GET_REPLY``    link settings
  ``ETHTOOL_MSG_LINKINFO_NTF``          link settings notification
  ``ETHTOOL_MSG_LINKMODES_GET_REPLY``   link modes info
  ``ETHTOOL_MSG_LINKMODES_NTF``         link modes notification
  ``ETHTOOL_MSG_LINKSTATE_GET_REPLY``   link state info
  ``ETHTOOL_MSG_DEBUG_GET_REPLY``       debugging settings
  ``ETHTOOL_MSG_DEBUG_NTF``             debugging settings notification
  ``ETHTOOL_MSG_WOL_GET_REPLY``         wake-on-lan settings
  ``ETHTOOL_MSG_WOL_NTF``               wake-on-lan settings notification
  ``ETHTOOL_MSG_FEATURES_GET_REPLY``    device features
  ``ETHTOOL_MSG_FEATURES_SET_REPLY``    optional reply to FEATURES_SET
  ``ETHTOOL_MSG_FEATURES_NTF``          netdev features notification
  ``ETHTOOL_MSG_PRIVFLAGS_GET_REPLY``   private flags
  ``ETHTOOL_MSG_PRIVFLAGS_NTF``         private flags
  ``ETHTOOL_MSG_RINGS_GET_REPLY``       ring sizes
  ``ETHTOOL_MSG_RINGS_NTF``             ring sizes
  ``ETHTOOL_MSG_CHANNELS_GET_REPLY``    channel counts
  ``ETHTOOL_MSG_CHANNELS_NTF``          channel counts
  ``ETHTOOL_MSG_COALESCE_GET_REPLY``    coalescing parameters
  ``ETHTOOL_MSG_COALESCE_NTF``          coalescing parameters
  ``ETHTOOL_MSG_PAUSE_GET_REPLY``       pause parameters
  ``ETHTOOL_MSG_PAUSE_NTF``             pause parameters
  ``ETHTOOL_MSG_EEE_GET_REPLY``         EEE settings
  ``ETHTOOL_MSG_EEE_NTF``               EEE settings
  ``ETHTOOL_MSG_TSINFO_GET_REPLY``	timestamping info
  ``ETHTOOL_MSG_CABLE_TEST_NTF``        Cable test results
  ``ETHTOOL_MSG_CABLE_TEST_TDR_NTF``    Cable test TDR results
  ===================================== =================================

``GET`` requests are sent by userspace applications to retrieve device
information. They usually do not contain any message specific attributes.
Kernel replies with corresponding "GET_REPLY" message. For most types, ``GET``
request with ``NLM_F_DUMP`` and no device identification can be used to query
the information for all devices supporting the request.

If the data can be also modified, corresponding ``SET`` message with the same
layout as corresponding ``GET_REPLY`` is used to request changes. Only
attributes where a change is requested are included in such request (also, not
all attributes may be changed). Replies to most ``SET`` request consist only
of error code and extack; if kernel provides additional data, it is sent in
the form of corresponding ``SET_REPLY`` message which can be suppressed by
setting ``ETHTOOL_FLAG_OMIT_REPLY`` flag in request header.

Data modification also triggers sending a ``NTF`` message with a notification.
These usually bear only a subset of attributes which was affected by the
change. The same notification is issued if the data is modified using other
means (mostly ioctl ethtool interface). Unlike notifications from ethtool
netlink code which are only sent if something actually changed, notifications
triggered by ioctl interface may be sent even if the request did not actually
change any data.

``ACT`` messages request kernel (driver) to perform a specific action. If some
information is reported by kernel (which can be suppressed by setting
``ETHTOOL_FLAG_OMIT_REPLY`` flag in request header), the reply takes form of
an ``ACT_REPLY`` message. Performing an action also triggers a notification
(``NTF`` message).

Later sections describe the format and semantics of these messages.


STRSET_GET
==========

Requests contents of a string set as provided by ioctl commands
``ETHTOOL_GSSET_INFO`` and ``ETHTOOL_GSTRINGS.`` String sets are not user
writeable so that the corresponding ``STRSET_SET`` message is only used in
kernel replies. There are two types of string sets: global (independent of
a device, e.g. device feature names) and device specific (e.g. device private
flags).

Request contents:

 +---------------------------------------+--------+------------------------+
 | ``ETHTOOL_A_STRSET_HEADER``           | nested | request header         |
 +---------------------------------------+--------+------------------------+
 | ``ETHTOOL_A_STRSET_STRINGSETS``       | nested | string set to request  |
 +-+-------------------------------------+--------+------------------------+
 | | ``ETHTOOL_A_STRINGSETS_STRINGSET+`` | nested | one string set         |
 +-+-+-----------------------------------+--------+------------------------+
 | | | ``ETHTOOL_A_STRINGSET_ID``        | u32    | set id                 |
 +-+-+-----------------------------------+--------+------------------------+

Kernel response contents:

 +---------------------------------------+--------+-----------------------+
 | ``ETHTOOL_A_STRSET_HEADER``           | nested | reply header          |
 +---------------------------------------+--------+-----------------------+
 | ``ETHTOOL_A_STRSET_STRINGSETS``       | nested | array of string sets  |
 +-+-------------------------------------+--------+-----------------------+
 | | ``ETHTOOL_A_STRINGSETS_STRINGSET+`` | nested | one string set        |
 +-+-+-----------------------------------+--------+-----------------------+
 | | | ``ETHTOOL_A_STRINGSET_ID``        | u32    | set id                |
 +-+-+-----------------------------------+--------+-----------------------+
 | | | ``ETHTOOL_A_STRINGSET_COUNT``     | u32    | number of strings     |
 +-+-+-----------------------------------+--------+-----------------------+
 | | | ``ETHTOOL_A_STRINGSET_STRINGS``   | nested | array of strings      |
 +-+-+-+---------------------------------+--------+-----------------------+
 | | | | ``ETHTOOL_A_STRINGS_STRING+``   | nested | one string            |
 +-+-+-+-+-------------------------------+--------+-----------------------+
 | | | | | ``ETHTOOL_A_STRING_INDEX``    | u32    | string index          |
 +-+-+-+-+-------------------------------+--------+-----------------------+
 | | | | | ``ETHTOOL_A_STRING_VALUE``    | string | string value          |
 +-+-+-+-+-------------------------------+--------+-----------------------+
 | ``ETHTOOL_A_STRSET_COUNTS_ONLY``      | flag   | return only counts    |
 +---------------------------------------+--------+-----------------------+

Device identification in request header is optional. Depending on its presence
a and ``NLM_F_DUMP`` flag, there are three type of ``STRSET_GET`` requests:

 - no ``NLM_F_DUMP,`` no device: get "global" stringsets
 - no ``NLM_F_DUMP``, with device: get string sets related to the device
 - ``NLM_F_DUMP``, no device: get device related string sets for all devices

If there is no ``ETHTOOL_A_STRSET_STRINGSETS`` array, all string sets of
requested type are returned, otherwise only those specified in the request.
Flag ``ETHTOOL_A_STRSET_COUNTS_ONLY`` tells kernel to only return string
counts of the sets, not the actual strings.


LINKINFO_GET
============

Requests link settings as provided by ``ETHTOOL_GLINKSETTINGS`` except for
link modes and autonegotiation related information. The request does not use
any attributes.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_LINKINFO_HEADER``         nested  request header
  ====================================  ======  ==========================

Kernel response contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_LINKINFO_HEADER``         nested  reply header
  ``ETHTOOL_A_LINKINFO_PORT``           u8      physical port
  ``ETHTOOL_A_LINKINFO_PHYADDR``        u8      phy MDIO address
  ``ETHTOOL_A_LINKINFO_TP_MDIX``        u8      MDI(-X) status
  ``ETHTOOL_A_LINKINFO_TP_MDIX_CTRL``   u8      MDI(-X) control
  ``ETHTOOL_A_LINKINFO_TRANSCEIVER``    u8      transceiver
  ====================================  ======  ==========================

Attributes and their values have the same meaning as matching members of the
corresponding ioctl structures.

``LINKINFO_GET`` allows dump requests (kernel returns reply message for all
devices supporting the request).


LINKINFO_SET
============

``LINKINFO_SET`` request allows setting some of the attributes reported by
``LINKINFO_GET``.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_LINKINFO_HEADER``         nested  request header
  ``ETHTOOL_A_LINKINFO_PORT``           u8      physical port
  ``ETHTOOL_A_LINKINFO_PHYADDR``        u8      phy MDIO address
  ``ETHTOOL_A_LINKINFO_TP_MDIX_CTRL``   u8      MDI(-X) control
  ====================================  ======  ==========================

MDI(-X) status and transceiver cannot be set, request with the corresponding
attributes is rejected.


LINKMODES_GET
=============

Requests link modes (supported, advertised and peer advertised) and related
information (autonegotiation status, link speed and duplex) as provided by
``ETHTOOL_GLINKSETTINGS``. The request does not use any attributes.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_LINKMODES_HEADER``        nested  request header
  ====================================  ======  ==========================

Kernel response contents:

  ==========================================  ======  ==========================
  ``ETHTOOL_A_LINKMODES_HEADER``              nested  reply header
  ``ETHTOOL_A_LINKMODES_AUTONEG``             u8      autonegotiation status
  ``ETHTOOL_A_LINKMODES_OURS``                bitset  advertised link modes
  ``ETHTOOL_A_LINKMODES_PEER``                bitset  partner link modes
  ``ETHTOOL_A_LINKMODES_SPEED``               u32     link speed (Mb/s)
  ``ETHTOOL_A_LINKMODES_DUPLEX``              u8      duplex mode
  ``ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG``    u8      Master/slave port mode
  ``ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE``  u8      Master/slave port state
  ==========================================  ======  ==========================

For ``ETHTOOL_A_LINKMODES_OURS``, value represents advertised modes and mask
represents supported modes. ``ETHTOOL_A_LINKMODES_PEER`` in the reply is a bit
list.

``LINKMODES_GET`` allows dump requests (kernel returns reply messages for all
devices supporting the request).


LINKMODES_SET
=============

Request contents:

  ==========================================  ======  ==========================
  ``ETHTOOL_A_LINKMODES_HEADER``              nested  request header
  ``ETHTOOL_A_LINKMODES_AUTONEG``             u8      autonegotiation status
  ``ETHTOOL_A_LINKMODES_OURS``                bitset  advertised link modes
  ``ETHTOOL_A_LINKMODES_PEER``                bitset  partner link modes
  ``ETHTOOL_A_LINKMODES_SPEED``               u32     link speed (Mb/s)
  ``ETHTOOL_A_LINKMODES_DUPLEX``              u8      duplex mode
  ``ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG``    u8      Master/slave port mode
  ==========================================  ======  ==========================

``ETHTOOL_A_LINKMODES_OURS`` bit set allows setting advertised link modes. If
autonegotiation is on (either set now or kept from before), advertised modes
are not changed (no ``ETHTOOL_A_LINKMODES_OURS`` attribute) and at least one
of speed and duplex is specified, kernel adjusts advertised modes to all
supported modes matching speed, duplex or both (whatever is specified). This
autoselection is done on ethtool side with ioctl interface, netlink interface
is supposed to allow requesting changes without knowing what exactly kernel
supports.


LINKSTATE_GET
=============

Requests link state information. Link up/down flag (as provided by
``ETHTOOL_GLINK`` ioctl command) is provided. Optionally, extended state might
be provided as well. In general, extended state describes reasons for why a port
is down, or why it operates in some non-obvious mode. This request does not have
any attributes.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_LINKSTATE_HEADER``        nested  request header
  ====================================  ======  ==========================

Kernel response contents:

  ====================================  ======  ============================
  ``ETHTOOL_A_LINKSTATE_HEADER``        nested  reply header
  ``ETHTOOL_A_LINKSTATE_LINK``          bool    link state (up/down)
  ``ETHTOOL_A_LINKSTATE_SQI``           u32     Current Signal Quality Index
  ``ETHTOOL_A_LINKSTATE_SQI_MAX``       u32     Max support SQI value
  ``ETHTOOL_A_LINKSTATE_EXT_STATE``     u8      link extended state
  ``ETHTOOL_A_LINKSTATE_EXT_SUBSTATE``  u8      link extended substate
  ====================================  ======  ============================

For most NIC drivers, the value of ``ETHTOOL_A_LINKSTATE_LINK`` returns
carrier flag provided by ``netif_carrier_ok()`` but there are drivers which
define their own handler.

``ETHTOOL_A_LINKSTATE_EXT_STATE`` and ``ETHTOOL_A_LINKSTATE_EXT_SUBSTATE`` are
optional values. ethtool core can provide either both
``ETHTOOL_A_LINKSTATE_EXT_STATE`` and ``ETHTOOL_A_LINKSTATE_EXT_SUBSTATE``,
or only ``ETHTOOL_A_LINKSTATE_EXT_STATE``, or none of them.

``LINKSTATE_GET`` allows dump requests (kernel returns reply messages for all
devices supporting the request).


Link extended states:

  ================================================      ============================================
  ``ETHTOOL_LINK_EXT_STATE_AUTONEG``                    States relating to the autonegotiation or
                                                        issues therein

  ``ETHTOOL_LINK_EXT_STATE_LINK_TRAINING_FAILURE``      Failure during link training

  ``ETHTOOL_LINK_EXT_STATE_LINK_LOGICAL_MISMATCH``      Logical mismatch in physical coding sublayer
                                                        or forward error correction sublayer

  ``ETHTOOL_LINK_EXT_STATE_BAD_SIGNAL_INTEGRITY``       Signal integrity issues

  ``ETHTOOL_LINK_EXT_STATE_NO_CABLE``                   No cable connected

  ``ETHTOOL_LINK_EXT_STATE_CABLE_ISSUE``                Failure is related to cable,
                                                        e.g., unsupported cable

  ``ETHTOOL_LINK_EXT_STATE_EEPROM_ISSUE``               Failure is related to EEPROM, e.g., failure
                                                        during reading or parsing the data

  ``ETHTOOL_LINK_EXT_STATE_CALIBRATION_FAILURE``        Failure during calibration algorithm

  ``ETHTOOL_LINK_EXT_STATE_POWER_BUDGET_EXCEEDED``      The hardware is not able to provide the
                                                        power required from cable or module

  ``ETHTOOL_LINK_EXT_STATE_OVERHEAT``                   The module is overheated
  ================================================      ============================================

Link extended substates:

  Autoneg substates:

  ===============================================================   ================================
  ``ETHTOOL_LINK_EXT_SUBSTATE_AN_NO_PARTNER_DETECTED``              Peer side is down

  ``ETHTOOL_LINK_EXT_SUBSTATE_AN_ACK_NOT_RECEIVED``                 Ack not received from peer side

  ``ETHTOOL_LINK_EXT_SUBSTATE_AN_NEXT_PAGE_EXCHANGE_FAILED``        Next page exchange failed

  ``ETHTOOL_LINK_EXT_SUBSTATE_AN_NO_PARTNER_DETECTED_FORCE_MODE``   Peer side is down during force
                                                                    mode or there is no agreement of
                                                                    speed

  ``ETHTOOL_LINK_EXT_SUBSTATE_AN_FEC_MISMATCH_DURING_OVERRIDE``     Forward error correction modes
                                                                    in both sides are mismatched

  ``ETHTOOL_LINK_EXT_SUBSTATE_AN_NO_HCD``                           No Highest Common Denominator
  ===============================================================   ================================

  Link training substates:

  ===========================================================================   ====================
  ``ETHTOOL_LINK_EXT_SUBSTATE_LT_KR_FRAME_LOCK_NOT_ACQUIRED``                    Frames were not
                                                                                 recognized, the
                                                                                 lock failed

  ``ETHTOOL_LINK_EXT_SUBSTATE_LT_KR_LINK_INHIBIT_TIMEOUT``                       The lock did not
                                                                                 occur before
                                                                                 timeout

  ``ETHTOOL_LINK_EXT_SUBSTATE_LT_KR_LINK_PARTNER_DID_NOT_SET_RECEIVER_READY``    Peer side did not
                                                                                 send ready signal
                                                                                 after training
                                                                                 process

  ``ETHTOOL_LINK_EXT_SUBSTATE_LT_REMOTE_FAULT``                                  Remote side is not
                                                                                 ready yet
  ===========================================================================   ====================

  Link logical mismatch substates:

  ================================================================   ===============================
  ``ETHTOOL_LINK_EXT_SUBSTATE_LLM_PCS_DID_NOT_ACQUIRE_BLOCK_LOCK``   Physical coding sublayer was
                                                                     not locked in first phase -
                                                                     block lock

  ``ETHTOOL_LINK_EXT_SUBSTATE_LLM_PCS_DID_NOT_ACQUIRE_AM_LOCK``      Physical coding sublayer was
                                                                     not locked in second phase -
                                                                     alignment markers lock

  ``ETHTOOL_LINK_EXT_SUBSTATE_LLM_PCS_DID_NOT_GET_ALIGN_STATUS``     Physical coding sublayer did
                                                                     not get align status

  ``ETHTOOL_LINK_EXT_SUBSTATE_LLM_FC_FEC_IS_NOT_LOCKED``             FC forward error correction is
                                                                     not locked

  ``ETHTOOL_LINK_EXT_SUBSTATE_LLM_RS_FEC_IS_NOT_LOCKED``             RS forward error correction is
                                                                     not locked
  ================================================================   ===============================

  Bad signal integrity substates:

  =================================================================    =============================
  ``ETHTOOL_LINK_EXT_SUBSTATE_BSI_LARGE_NUMBER_OF_PHYSICAL_ERRORS``    Large number of physical
                                                                       errors

  ``ETHTOOL_LINK_EXT_SUBSTATE_BSI_UNSUPPORTED_RATE``                   The system attempted to
                                                                       operate the cable at a rate
                                                                       that is not formally
                                                                       supported, which led to
                                                                       signal integrity issues
  =================================================================    =============================

  Cable issue substates:

  ===================================================   ============================================
  ``ETHTOOL_LINK_EXT_SUBSTATE_CI_UNSUPPORTED_CABLE``    Unsupported cable

  ``ETHTOOL_LINK_EXT_SUBSTATE_CI_CABLE_TEST_FAILURE``   Cable test failure
  ===================================================   ============================================

DEBUG_GET
=========

Requests debugging settings of a device. At the moment, only message mask is
provided.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_DEBUG_HEADER``            nested  request header
  ====================================  ======  ==========================

Kernel response contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_DEBUG_HEADER``            nested  reply header
  ``ETHTOOL_A_DEBUG_MSGMASK``           bitset  message mask
  ====================================  ======  ==========================

The message mask (``ETHTOOL_A_DEBUG_MSGMASK``) is equal to message level as
provided by ``ETHTOOL_GMSGLVL`` and set by ``ETHTOOL_SMSGLVL`` in ioctl
interface. While it is called message level there for historical reasons, most
drivers and almost all newer drivers use it as a mask of enabled message
classes (represented by ``NETIF_MSG_*`` constants); therefore netlink
interface follows its actual use in practice.

``DEBUG_GET`` allows dump requests (kernel returns reply messages for all
devices supporting the request).


DEBUG_SET
=========

Set or update debugging settings of a device. At the moment, only message mask
is supported.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_DEBUG_HEADER``            nested  request header
  ``ETHTOOL_A_DEBUG_MSGMASK``           bitset  message mask
  ====================================  ======  ==========================

``ETHTOOL_A_DEBUG_MSGMASK`` bit set allows setting or modifying mask of
enabled debugging message types for the device.


WOL_GET
=======

Query device wake-on-lan settings. Unlike most "GET" type requests,
``ETHTOOL_MSG_WOL_GET`` requires (netns) ``CAP_NET_ADMIN`` privileges as it
(potentially) provides SecureOn(tm) password which is confidential.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_WOL_HEADER``              nested  request header
  ====================================  ======  ==========================

Kernel response contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_WOL_HEADER``              nested  reply header
  ``ETHTOOL_A_WOL_MODES``               bitset  mask of enabled WoL modes
  ``ETHTOOL_A_WOL_SOPASS``              binary  SecureOn(tm) password
  ====================================  ======  ==========================

In reply, ``ETHTOOL_A_WOL_MODES`` mask consists of modes supported by the
device, value of modes which are enabled. ``ETHTOOL_A_WOL_SOPASS`` is only
included in reply if ``WAKE_MAGICSECURE`` mode is supported.


WOL_SET
=======

Set or update wake-on-lan settings.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_WOL_HEADER``              nested  request header
  ``ETHTOOL_A_WOL_MODES``               bitset  enabled WoL modes
  ``ETHTOOL_A_WOL_SOPASS``              binary  SecureOn(tm) password
  ====================================  ======  ==========================

``ETHTOOL_A_WOL_SOPASS`` is only allowed for devices supporting
``WAKE_MAGICSECURE`` mode.


FEATURES_GET
============

Gets netdev features like ``ETHTOOL_GFEATURES`` ioctl request.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_FEATURES_HEADER``         nested  request header
  ====================================  ======  ==========================

Kernel response contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_FEATURES_HEADER``         nested  reply header
  ``ETHTOOL_A_FEATURES_HW``             bitset  dev->hw_features
  ``ETHTOOL_A_FEATURES_WANTED``         bitset  dev->wanted_features
  ``ETHTOOL_A_FEATURES_ACTIVE``         bitset  dev->features
  ``ETHTOOL_A_FEATURES_NOCHANGE``       bitset  NETIF_F_NEVER_CHANGE
  ====================================  ======  ==========================

Bitmaps in kernel response have the same meaning as bitmaps used in ioctl
interference but attribute names are different (they are based on
corresponding members of struct net_device). Legacy "flags" are not provided,
if userspace needs them (most likely only ethtool for backward compatibility),
it can calculate their values from related feature bits itself.
ETHA_FEATURES_HW uses mask consisting of all features recognized by kernel (to
provide all names when using verbose bitmap format), the other three use no
mask (simple bit lists).


FEATURES_SET
============

Request to set netdev features like ``ETHTOOL_SFEATURES`` ioctl request.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_FEATURES_HEADER``         nested  request header
  ``ETHTOOL_A_FEATURES_WANTED``         bitset  requested features
  ====================================  ======  ==========================

Kernel response contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_FEATURES_HEADER``         nested  reply header
  ``ETHTOOL_A_FEATURES_WANTED``         bitset  diff wanted vs. result
  ``ETHTOOL_A_FEATURES_ACTIVE``         bitset  diff old vs. new active
  ====================================  ======  ==========================

Request constains only one bitset which can be either value/mask pair (request
to change specific feature bits and leave the rest) or only a value (request
to set all features to specified set).

As request is subject to netdev_change_features() sanity checks, optional
kernel reply (can be suppressed by ``ETHTOOL_FLAG_OMIT_REPLY`` flag in request
header) informs client about the actual result. ``ETHTOOL_A_FEATURES_WANTED``
reports the difference between client request and actual result: mask consists
of bits which differ between requested features and result (dev->features
after the operation), value consists of values of these bits in the request
(i.e. negated values from resulting features). ``ETHTOOL_A_FEATURES_ACTIVE``
reports the difference between old and new dev->features: mask consists of
bits which have changed, values are their values in new dev->features (after
the operation).

``ETHTOOL_MSG_FEATURES_NTF`` notification is sent not only if device features
are modified using ``ETHTOOL_MSG_FEATURES_SET`` request or on of ethtool ioctl
request but also each time features are modified with netdev_update_features()
or netdev_change_features().


PRIVFLAGS_GET
=============

Gets private flags like ``ETHTOOL_GPFLAGS`` ioctl request.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_PRIVFLAGS_HEADER``        nested  request header
  ====================================  ======  ==========================

Kernel response contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_PRIVFLAGS_HEADER``        nested  reply header
  ``ETHTOOL_A_PRIVFLAGS_FLAGS``         bitset  private flags
  ====================================  ======  ==========================

``ETHTOOL_A_PRIVFLAGS_FLAGS`` is a bitset with values of device private flags.
These flags are defined by driver, their number and names (and also meaning)
are device dependent. For compact bitset format, names can be retrieved as
``ETH_SS_PRIV_FLAGS`` string set. If verbose bitset format is requested,
response uses all private flags supported by the device as mask so that client
gets the full information without having to fetch the string set with names.


PRIVFLAGS_SET
=============

Sets or modifies values of device private flags like ``ETHTOOL_SPFLAGS``
ioctl request.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_PRIVFLAGS_HEADER``        nested  request header
  ``ETHTOOL_A_PRIVFLAGS_FLAGS``         bitset  private flags
  ====================================  ======  ==========================

``ETHTOOL_A_PRIVFLAGS_FLAGS`` can either set the whole set of private flags or
modify only values of some of them.


RINGS_GET
=========

Gets ring sizes like ``ETHTOOL_GRINGPARAM`` ioctl request.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_RINGS_HEADER``            nested  request header
  ====================================  ======  ==========================

Kernel response contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_RINGS_HEADER``            nested  reply header
  ``ETHTOOL_A_RINGS_RX_MAX``            u32     max size of RX ring
  ``ETHTOOL_A_RINGS_RX_MINI_MAX``       u32     max size of RX mini ring
  ``ETHTOOL_A_RINGS_RX_JUMBO_MAX``      u32     max size of RX jumbo ring
  ``ETHTOOL_A_RINGS_TX_MAX``            u32     max size of TX ring
  ``ETHTOOL_A_RINGS_RX``                u32     size of RX ring
  ``ETHTOOL_A_RINGS_RX_MINI``           u32     size of RX mini ring
  ``ETHTOOL_A_RINGS_RX_JUMBO``          u32     size of RX jumbo ring
  ``ETHTOOL_A_RINGS_TX``                u32     size of TX ring
  ====================================  ======  ==========================


RINGS_SET
=========

Sets ring sizes like ``ETHTOOL_SRINGPARAM`` ioctl request.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_RINGS_HEADER``            nested  reply header
  ``ETHTOOL_A_RINGS_RX``                u32     size of RX ring
  ``ETHTOOL_A_RINGS_RX_MINI``           u32     size of RX mini ring
  ``ETHTOOL_A_RINGS_RX_JUMBO``          u32     size of RX jumbo ring
  ``ETHTOOL_A_RINGS_TX``                u32     size of TX ring
  ====================================  ======  ==========================

Kernel checks that requested ring sizes do not exceed limits reported by
driver. Driver may impose additional constraints and may not suspport all
attributes.


CHANNELS_GET
============

Gets channel counts like ``ETHTOOL_GCHANNELS`` ioctl request.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_CHANNELS_HEADER``         nested  request header
  ====================================  ======  ==========================

Kernel response contents:

  =====================================  ======  ==========================
  ``ETHTOOL_A_CHANNELS_HEADER``          nested  reply header
  ``ETHTOOL_A_CHANNELS_RX_MAX``          u32     max receive channels
  ``ETHTOOL_A_CHANNELS_TX_MAX``          u32     max transmit channels
  ``ETHTOOL_A_CHANNELS_OTHER_MAX``       u32     max other channels
  ``ETHTOOL_A_CHANNELS_COMBINED_MAX``    u32     max combined channels
  ``ETHTOOL_A_CHANNELS_RX_COUNT``        u32     receive channel count
  ``ETHTOOL_A_CHANNELS_TX_COUNT``        u32     transmit channel count
  ``ETHTOOL_A_CHANNELS_OTHER_COUNT``     u32     other channel count
  ``ETHTOOL_A_CHANNELS_COMBINED_COUNT``  u32     combined channel count
  =====================================  ======  ==========================


CHANNELS_SET
============

Sets channel counts like ``ETHTOOL_SCHANNELS`` ioctl request.

Request contents:

  =====================================  ======  ==========================
  ``ETHTOOL_A_CHANNELS_HEADER``          nested  request header
  ``ETHTOOL_A_CHANNELS_RX_COUNT``        u32     receive channel count
  ``ETHTOOL_A_CHANNELS_TX_COUNT``        u32     transmit channel count
  ``ETHTOOL_A_CHANNELS_OTHER_COUNT``     u32     other channel count
  ``ETHTOOL_A_CHANNELS_COMBINED_COUNT``  u32     combined channel count
  =====================================  ======  ==========================

Kernel checks that requested channel counts do not exceed limits reported by
driver. Driver may impose additional constraints and may not suspport all
attributes.


COALESCE_GET
============

Gets coalescing parameters like ``ETHTOOL_GCOALESCE`` ioctl request.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_COALESCE_HEADER``         nested  request header
  ====================================  ======  ==========================

Kernel response contents:

  ===========================================  ======  =======================
  ``ETHTOOL_A_COALESCE_HEADER``                nested  reply header
  ``ETHTOOL_A_COALESCE_RX_USECS``              u32     delay (us), normal Rx
  ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES``         u32     max packets, normal Rx
  ``ETHTOOL_A_COALESCE_RX_USECS_IRQ``          u32     delay (us), Rx in IRQ
  ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ``     u32     max packets, Rx in IRQ
  ``ETHTOOL_A_COALESCE_TX_USECS``              u32     delay (us), normal Tx
  ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES``         u32     max packets, normal Tx
  ``ETHTOOL_A_COALESCE_TX_USECS_IRQ``          u32     delay (us), Tx in IRQ
  ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ``     u32     IRQ packets, Tx in IRQ
  ``ETHTOOL_A_COALESCE_STATS_BLOCK_USECS``     u32     delay of stats update
  ``ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX``       bool    adaptive Rx coalesce
  ``ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX``       bool    adaptive Tx coalesce
  ``ETHTOOL_A_COALESCE_PKT_RATE_LOW``          u32     threshold for low rate
  ``ETHTOOL_A_COALESCE_RX_USECS_LOW``          u32     delay (us), low Rx
  ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW``     u32     max packets, low Rx
  ``ETHTOOL_A_COALESCE_TX_USECS_LOW``          u32     delay (us), low Tx
  ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW``     u32     max packets, low Tx
  ``ETHTOOL_A_COALESCE_PKT_RATE_HIGH``         u32     threshold for high rate
  ``ETHTOOL_A_COALESCE_RX_USECS_HIGH``         u32     delay (us), high Rx
  ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH``    u32     max packets, high Rx
  ``ETHTOOL_A_COALESCE_TX_USECS_HIGH``         u32     delay (us), high Tx
  ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH``    u32     max packets, high Tx
  ``ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL``  u32     rate sampling interval
  ===========================================  ======  =======================

Attributes are only included in reply if their value is not zero or the
corresponding bit in ``ethtool_ops::supported_coalesce_params`` is set (i.e.
they are declared as supported by driver).


COALESCE_SET
============

Sets coalescing parameters like ``ETHTOOL_SCOALESCE`` ioctl request.

Request contents:

  ===========================================  ======  =======================
  ``ETHTOOL_A_COALESCE_HEADER``                nested  request header
  ``ETHTOOL_A_COALESCE_RX_USECS``              u32     delay (us), normal Rx
  ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES``         u32     max packets, normal Rx
  ``ETHTOOL_A_COALESCE_RX_USECS_IRQ``          u32     delay (us), Rx in IRQ
  ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ``     u32     max packets, Rx in IRQ
  ``ETHTOOL_A_COALESCE_TX_USECS``              u32     delay (us), normal Tx
  ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES``         u32     max packets, normal Tx
  ``ETHTOOL_A_COALESCE_TX_USECS_IRQ``          u32     delay (us), Tx in IRQ
  ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ``     u32     IRQ packets, Tx in IRQ
  ``ETHTOOL_A_COALESCE_STATS_BLOCK_USECS``     u32     delay of stats update
  ``ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX``       bool    adaptive Rx coalesce
  ``ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX``       bool    adaptive Tx coalesce
  ``ETHTOOL_A_COALESCE_PKT_RATE_LOW``          u32     threshold for low rate
  ``ETHTOOL_A_COALESCE_RX_USECS_LOW``          u32     delay (us), low Rx
  ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW``     u32     max packets, low Rx
  ``ETHTOOL_A_COALESCE_TX_USECS_LOW``          u32     delay (us), low Tx
  ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW``     u32     max packets, low Tx
  ``ETHTOOL_A_COALESCE_PKT_RATE_HIGH``         u32     threshold for high rate
  ``ETHTOOL_A_COALESCE_RX_USECS_HIGH``         u32     delay (us), high Rx
  ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH``    u32     max packets, high Rx
  ``ETHTOOL_A_COALESCE_TX_USECS_HIGH``         u32     delay (us), high Tx
  ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH``    u32     max packets, high Tx
  ``ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL``  u32     rate sampling interval
  ===========================================  ======  =======================

Request is rejected if it attributes declared as unsupported by driver (i.e.
such that the corresponding bit in ``ethtool_ops::supported_coalesce_params``
is not set), regardless of their values. Driver may impose additional
constraints on coalescing parameters and their values.


PAUSE_GET
============

Gets channel counts like ``ETHTOOL_GPAUSE`` ioctl request.

Request contents:

  =====================================  ======  ==========================
  ``ETHTOOL_A_PAUSE_HEADER``             nested  request header
  =====================================  ======  ==========================

Kernel response contents:

  =====================================  ======  ==========================
  ``ETHTOOL_A_PAUSE_HEADER``             nested  request header
  ``ETHTOOL_A_PAUSE_AUTONEG``            bool    pause autonegotiation
  ``ETHTOOL_A_PAUSE_RX``                 bool    receive pause frames
  ``ETHTOOL_A_PAUSE_TX``                 bool    transmit pause frames
  =====================================  ======  ==========================


PAUSE_SET
============

Sets pause parameters like ``ETHTOOL_GPAUSEPARAM`` ioctl request.

Request contents:

  =====================================  ======  ==========================
  ``ETHTOOL_A_PAUSE_HEADER``             nested  request header
  ``ETHTOOL_A_PAUSE_AUTONEG``            bool    pause autonegotiation
  ``ETHTOOL_A_PAUSE_RX``                 bool    receive pause frames
  ``ETHTOOL_A_PAUSE_TX``                 bool    transmit pause frames
  =====================================  ======  ==========================


EEE_GET
=======

Gets channel counts like ``ETHTOOL_GEEE`` ioctl request.

Request contents:

  =====================================  ======  ==========================
  ``ETHTOOL_A_EEE_HEADER``               nested  request header
  =====================================  ======  ==========================

Kernel response contents:

  =====================================  ======  ==========================
  ``ETHTOOL_A_EEE_HEADER``               nested  request header
  ``ETHTOOL_A_EEE_MODES_OURS``           bool    supported/advertised modes
  ``ETHTOOL_A_EEE_MODES_PEER``           bool    peer advertised link modes
  ``ETHTOOL_A_EEE_ACTIVE``               bool    EEE is actively used
  ``ETHTOOL_A_EEE_ENABLED``              bool    EEE is enabled
  ``ETHTOOL_A_EEE_TX_LPI_ENABLED``       bool    Tx lpi enabled
  ``ETHTOOL_A_EEE_TX_LPI_TIMER``         u32     Tx lpi timeout (in us)
  =====================================  ======  ==========================

In ``ETHTOOL_A_EEE_MODES_OURS``, mask consists of link modes for which EEE is
enabled, value of link modes for which EEE is advertised. Link modes for which
peer advertises EEE are listed in ``ETHTOOL_A_EEE_MODES_PEER`` (no mask). The
netlink interface allows reporting EEE status for all link modes but only
first 32 are provided by the ``ethtool_ops`` callback.


EEE_SET
=======

Sets pause parameters like ``ETHTOOL_GEEEPARAM`` ioctl request.

Request contents:

  =====================================  ======  ==========================
  ``ETHTOOL_A_EEE_HEADER``               nested  request header
  ``ETHTOOL_A_EEE_MODES_OURS``           bool    advertised modes
  ``ETHTOOL_A_EEE_ENABLED``              bool    EEE is enabled
  ``ETHTOOL_A_EEE_TX_LPI_ENABLED``       bool    Tx lpi enabled
  ``ETHTOOL_A_EEE_TX_LPI_TIMER``         u32     Tx lpi timeout (in us)
  =====================================  ======  ==========================

``ETHTOOL_A_EEE_MODES_OURS`` is used to either list link modes to advertise
EEE for (if there is no mask) or specify changes to the list (if there is
a mask). The netlink interface allows reporting EEE status for all link modes
but only first 32 can be set at the moment as that is what the ``ethtool_ops``
callback supports.


TSINFO_GET
==========

Gets timestamping information like ``ETHTOOL_GET_TS_INFO`` ioctl request.

Request contents:

  =====================================  ======  ==========================
  ``ETHTOOL_A_TSINFO_HEADER``            nested  request header
  =====================================  ======  ==========================

Kernel response contents:

  =====================================  ======  ==========================
  ``ETHTOOL_A_TSINFO_HEADER``            nested  request header
  ``ETHTOOL_A_TSINFO_TIMESTAMPING``      bitset  SO_TIMESTAMPING flags
  ``ETHTOOL_A_TSINFO_TX_TYPES``          bitset  supported Tx types
  ``ETHTOOL_A_TSINFO_RX_FILTERS``        bitset  supported Rx filters
  ``ETHTOOL_A_TSINFO_PHC_INDEX``         u32     PTP hw clock index
  =====================================  ======  ==========================

``ETHTOOL_A_TSINFO_PHC_INDEX`` is absent if there is no associated PHC (there
is no special value for this case). The bitset attributes are omitted if they
would be empty (no bit set).

CABLE_TEST
==========

Start a cable test.

Request contents:

  ====================================  ======  ==========================
  ``ETHTOOL_A_CABLE_TEST_HEADER``       nested  request header
  ====================================  ======  ==========================

Notification contents:

An Ethernet cable typically contains 1, 2 or 4 pairs. The length of
the pair can only be measured when there is a fault in the pair and
hence a reflection. Information about the fault may not be available,
depending on the specific hardware. Hence the contents of the notify
message are mostly optional. The attributes can be repeated an
arbitrary number of times, in an arbitrary order, for an arbitrary
number of pairs.

The example shows the notification sent when the test is completed for
a T2 cable, i.e. two pairs. One pair is OK and hence has no length
information. The second pair has a fault and does have length
information.

 +---------------------------------------------+--------+---------------------+
 | ``ETHTOOL_A_CABLE_TEST_HEADER``             | nested | reply header        |
 +---------------------------------------------+--------+---------------------+
 | ``ETHTOOL_A_CABLE_TEST_STATUS``             | u8     | completed           |
 +---------------------------------------------+--------+---------------------+
 | ``ETHTOOL_A_CABLE_TEST_NTF_NEST``           | nested | all the results     |
 +-+-------------------------------------------+--------+---------------------+
 | | ``ETHTOOL_A_CABLE_NEST_RESULT``           | nested | cable test result   |
 +-+-+-----------------------------------------+--------+---------------------+
 | | | ``ETHTOOL_A_CABLE_RESULTS_PAIR``        | u8     | pair number         |
 +-+-+-----------------------------------------+--------+---------------------+
 | | | ``ETHTOOL_A_CABLE_RESULTS_CODE``        | u8     | result code         |
 +-+-+-----------------------------------------+--------+---------------------+
 | | ``ETHTOOL_A_CABLE_NEST_RESULT``           | nested | cable test results  |
 +-+-+-----------------------------------------+--------+---------------------+
 | | | ``ETHTOOL_A_CABLE_RESULTS_PAIR``        | u8     | pair number         |
 +-+-+-----------------------------------------+--------+---------------------+
 | | | ``ETHTOOL_A_CABLE_RESULTS_CODE``        | u8     | result code         |
 +-+-+-----------------------------------------+--------+---------------------+
 | | ``ETHTOOL_A_CABLE_NEST_FAULT_LENGTH``     | nested | cable length        |
 +-+-+-----------------------------------------+--------+---------------------+
 | | | ``ETHTOOL_A_CABLE_FAULT_LENGTH_PAIR``   | u8     | pair number         |
 +-+-+-----------------------------------------+--------+---------------------+
 | | | ``ETHTOOL_A_CABLE_FAULT_LENGTH_CM``     | u32    | length in cm        |
 +-+-+-----------------------------------------+--------+---------------------+

CABLE_TEST TDR
==============

Start a cable test and report raw TDR data

Request contents:

 +--------------------------------------------+--------+-----------------------+
 | ``ETHTOOL_A_CABLE_TEST_TDR_HEADER``        | nested | reply header          |
 +--------------------------------------------+--------+-----------------------+
 | ``ETHTOOL_A_CABLE_TEST_TDR_CFG``           | nested | test configuration    |
 +-+------------------------------------------+--------+-----------------------+
 | | ``ETHTOOL_A_CABLE_STEP_FIRST_DISTANCE``  | u32    | first data distance   |
 +-+-+----------------------------------------+--------+-----------------------+
 | | ``ETHTOOL_A_CABLE_STEP_LAST_DISTANCE``   | u32    | last data distance    |
 +-+-+----------------------------------------+--------+-----------------------+
 | | ``ETHTOOL_A_CABLE_STEP_STEP_DISTANCE``   | u32    | distance of each step |
 +-+-+----------------------------------------+--------+-----------------------+
 | | ``ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR``    | u8     | pair to test          |
 +-+-+----------------------------------------+--------+-----------------------+

The ETHTOOL_A_CABLE_TEST_TDR_CFG is optional, as well as all members
of the nest. All distances are expressed in centimeters. The PHY takes
the distances as a guide, and rounds to the nearest distance it
actually supports. If a pair is passed, only that one pair will be
tested. Otherwise all pairs are tested.

Notification contents:

Raw TDR data is gathered by sending a pulse down the cable and
recording the amplitude of the reflected pulse for a given distance.

It can take a number of seconds to collect TDR data, especial if the
full 100 meters is probed at 1 meter intervals. When the test is
started a notification will be sent containing just
ETHTOOL_A_CABLE_TEST_TDR_STATUS with the value
ETHTOOL_A_CABLE_TEST_NTF_STATUS_STARTED.

When the test has completed a second notification will be sent
containing ETHTOOL_A_CABLE_TEST_TDR_STATUS with the value
ETHTOOL_A_CABLE_TEST_NTF_STATUS_COMPLETED and the TDR data.

The message may optionally contain the amplitude of the pulse send
down the cable. This is measured in mV. A reflection should not be
bigger than transmitted pulse.

Before the raw TDR data should be an ETHTOOL_A_CABLE_TDR_NEST_STEP
nest containing information about the distance along the cable for the
first reading, the last reading, and the step between each
reading. Distances are measured in centimeters. These should be the
exact values the PHY used. These may be different to what the user
requested, if the native measurement resolution is greater than 1 cm.

For each step along the cable, a ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE is
used to report the amplitude of the reflection for a given pair.

 +---------------------------------------------+--------+----------------------+
 | ``ETHTOOL_A_CABLE_TEST_TDR_HEADER``         | nested | reply header         |
 +---------------------------------------------+--------+----------------------+
 | ``ETHTOOL_A_CABLE_TEST_TDR_STATUS``         | u8     | completed            |
 +---------------------------------------------+--------+----------------------+
 | ``ETHTOOL_A_CABLE_TEST_TDR_NTF_NEST``       | nested | all the results      |
 +-+-------------------------------------------+--------+----------------------+
 | | ``ETHTOOL_A_CABLE_TDR_NEST_PULSE``        | nested | TX Pulse amplitude   |
 +-+-+-----------------------------------------+--------+----------------------+
 | | | ``ETHTOOL_A_CABLE_PULSE_mV``            | s16    | Pulse amplitude      |
 +-+-+-----------------------------------------+--------+----------------------+
 | | ``ETHTOOL_A_CABLE_NEST_STEP``             | nested | TDR step info        |
 +-+-+-----------------------------------------+--------+----------------------+
 | | | ``ETHTOOL_A_CABLE_STEP_FIRST_DISTANCE`` | u32    | First data distance  |
 +-+-+-----------------------------------------+--------+----------------------+
 | | | ``ETHTOOL_A_CABLE_STEP_LAST_DISTANCE``  | u32    | Last data distance   |
 +-+-+-----------------------------------------+--------+----------------------+
 | | | ``ETHTOOL_A_CABLE_STEP_STEP_DISTANCE``  | u32    | distance of each step|
 +-+-+-----------------------------------------+--------+----------------------+
 | | ``ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE``    | nested | Reflection amplitude |
 +-+-+-----------------------------------------+--------+----------------------+
 | | | ``ETHTOOL_A_CABLE_RESULTS_PAIR``        | u8     | pair number          |
 +-+-+-----------------------------------------+--------+----------------------+
 | | | ``ETHTOOL_A_CABLE_AMPLITUDE_mV``        | s16    | Reflection amplitude |
 +-+-+-----------------------------------------+--------+----------------------+
 | | ``ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE``    | nested | Reflection amplitude |
 +-+-+-----------------------------------------+--------+----------------------+
 | | | ``ETHTOOL_A_CABLE_RESULTS_PAIR``        | u8     | pair number          |
 +-+-+-----------------------------------------+--------+----------------------+
 | | | ``ETHTOOL_A_CABLE_AMPLITUDE_mV``        | s16    | Reflection amplitude |
 +-+-+-----------------------------------------+--------+----------------------+
 | | ``ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE``    | nested | Reflection amplitude |
 +-+-+-----------------------------------------+--------+----------------------+
 | | | ``ETHTOOL_A_CABLE_RESULTS_PAIR``        | u8     | pair number          |
 +-+-+-----------------------------------------+--------+----------------------+
 | | | ``ETHTOOL_A_CABLE_AMPLITUDE_mV``        | s16    | Reflection amplitude |
 +-+-+-----------------------------------------+--------+----------------------+

TUNNEL_INFO
===========

Gets information about the tunnel state NIC is aware of.

Request contents:

  =====================================  ======  ==========================
  ``ETHTOOL_A_TUNNEL_INFO_HEADER``       nested  request header
  =====================================  ======  ==========================

Kernel response contents:

 +---------------------------------------------+--------+---------------------+
 | ``ETHTOOL_A_TUNNEL_INFO_HEADER``            | nested | reply header        |
 +---------------------------------------------+--------+---------------------+
 | ``ETHTOOL_A_TUNNEL_INFO_UDP_PORTS``         | nested | all UDP port tables |
 +-+-------------------------------------------+--------+---------------------+
 | | ``ETHTOOL_A_TUNNEL_UDP_TABLE``            | nested | one UDP port table  |
 +-+-+-----------------------------------------+--------+---------------------+
 | | | ``ETHTOOL_A_TUNNEL_UDP_TABLE_SIZE``     | u32    | max size of the     |
 | | |                                         |        | table               |
 +-+-+-----------------------------------------+--------+---------------------+
 | | | ``ETHTOOL_A_TUNNEL_UDP_TABLE_TYPES``    | bitset | tunnel types which  |
 | | |                                         |        | table can hold      |
 +-+-+-----------------------------------------+--------+---------------------+
 | | | ``ETHTOOL_A_TUNNEL_UDP_TABLE_ENTRY``    | nested | offloaded UDP port  |
 +-+-+-+---------------------------------------+--------+---------------------+
 | | | | ``ETHTOOL_A_TUNNEL_UDP_ENTRY_PORT``   | be16   | UDP port            |
 +-+-+-+---------------------------------------+--------+---------------------+
 | | | | ``ETHTOOL_A_TUNNEL_UDP_ENTRY_TYPE``   | u32    | tunnel type         |
 +-+-+-+---------------------------------------+--------+---------------------+

For UDP tunnel table empty ``ETHTOOL_A_TUNNEL_UDP_TABLE_TYPES`` indicates that
the table contains static entries, hard-coded by the NIC.

Request translation
===================

The following table maps ioctl commands to netlink commands providing their
functionality. Entries with "n/a" in right column are commands which do not
have their netlink replacement yet. Entries which "n/a" in the left column
are netlink only.

  =================================== =====================================
  ioctl command                       netlink command
  =================================== =====================================
  ``ETHTOOL_GSET``                    ``ETHTOOL_MSG_LINKINFO_GET``
                                      ``ETHTOOL_MSG_LINKMODES_GET``
  ``ETHTOOL_SSET``                    ``ETHTOOL_MSG_LINKINFO_SET``
                                      ``ETHTOOL_MSG_LINKMODES_SET``
  ``ETHTOOL_GDRVINFO``                n/a
  ``ETHTOOL_GREGS``                   n/a
  ``ETHTOOL_GWOL``                    ``ETHTOOL_MSG_WOL_GET``
  ``ETHTOOL_SWOL``                    ``ETHTOOL_MSG_WOL_SET``
  ``ETHTOOL_GMSGLVL``                 ``ETHTOOL_MSG_DEBUG_GET``
  ``ETHTOOL_SMSGLVL``                 ``ETHTOOL_MSG_DEBUG_SET``
  ``ETHTOOL_NWAY_RST``                n/a
  ``ETHTOOL_GLINK``                   ``ETHTOOL_MSG_LINKSTATE_GET``
  ``ETHTOOL_GEEPROM``                 n/a
  ``ETHTOOL_SEEPROM``                 n/a
  ``ETHTOOL_GCOALESCE``               ``ETHTOOL_MSG_COALESCE_GET``
  ``ETHTOOL_SCOALESCE``               ``ETHTOOL_MSG_COALESCE_SET``
  ``ETHTOOL_GRINGPARAM``              ``ETHTOOL_MSG_RINGS_GET``
  ``ETHTOOL_SRINGPARAM``              ``ETHTOOL_MSG_RINGS_SET``
  ``ETHTOOL_GPAUSEPARAM``             ``ETHTOOL_MSG_PAUSE_GET``
  ``ETHTOOL_SPAUSEPARAM``             ``ETHTOOL_MSG_PAUSE_SET``
  ``ETHTOOL_GRXCSUM``                 ``ETHTOOL_MSG_FEATURES_GET``
  ``ETHTOOL_SRXCSUM``                 ``ETHTOOL_MSG_FEATURES_SET``
  ``ETHTOOL_GTXCSUM``                 ``ETHTOOL_MSG_FEATURES_GET``
  ``ETHTOOL_STXCSUM``                 ``ETHTOOL_MSG_FEATURES_SET``
  ``ETHTOOL_GSG``                     ``ETHTOOL_MSG_FEATURES_GET``
  ``ETHTOOL_SSG``                     ``ETHTOOL_MSG_FEATURES_SET``
  ``ETHTOOL_TEST``                    n/a
  ``ETHTOOL_GSTRINGS``                ``ETHTOOL_MSG_STRSET_GET``
  ``ETHTOOL_PHYS_ID``                 n/a
  ``ETHTOOL_GSTATS``                  n/a
  ``ETHTOOL_GTSO``                    ``ETHTOOL_MSG_FEATURES_GET``
  ``ETHTOOL_STSO``                    ``ETHTOOL_MSG_FEATURES_SET``
  ``ETHTOOL_GPERMADDR``               rtnetlink ``RTM_GETLINK``
  ``ETHTOOL_GUFO``                    ``ETHTOOL_MSG_FEATURES_GET``
  ``ETHTOOL_SUFO``                    ``ETHTOOL_MSG_FEATURES_SET``
  ``ETHTOOL_GGSO``                    ``ETHTOOL_MSG_FEATURES_GET``
  ``ETHTOOL_SGSO``                    ``ETHTOOL_MSG_FEATURES_SET``
  ``ETHTOOL_GFLAGS``                  ``ETHTOOL_MSG_FEATURES_GET``
  ``ETHTOOL_SFLAGS``                  ``ETHTOOL_MSG_FEATURES_SET``
  ``ETHTOOL_GPFLAGS``                 ``ETHTOOL_MSG_PRIVFLAGS_GET``
  ``ETHTOOL_SPFLAGS``                 ``ETHTOOL_MSG_PRIVFLAGS_SET``
  ``ETHTOOL_GRXFH``                   n/a
  ``ETHTOOL_SRXFH``                   n/a
  ``ETHTOOL_GGRO``                    ``ETHTOOL_MSG_FEATURES_GET``
  ``ETHTOOL_SGRO``                    ``ETHTOOL_MSG_FEATURES_SET``
  ``ETHTOOL_GRXRINGS``                n/a
  ``ETHTOOL_GRXCLSRLCNT``             n/a
  ``ETHTOOL_GRXCLSRULE``              n/a
  ``ETHTOOL_GRXCLSRLALL``             n/a
  ``ETHTOOL_SRXCLSRLDEL``             n/a
  ``ETHTOOL_SRXCLSRLINS``             n/a
  ``ETHTOOL_FLASHDEV``                n/a
  ``ETHTOOL_RESET``                   n/a
  ``ETHTOOL_SRXNTUPLE``               n/a
  ``ETHTOOL_GRXNTUPLE``               n/a
  ``ETHTOOL_GSSET_INFO``              ``ETHTOOL_MSG_STRSET_GET``
  ``ETHTOOL_GRXFHINDIR``              n/a
  ``ETHTOOL_SRXFHINDIR``              n/a
  ``ETHTOOL_GFEATURES``               ``ETHTOOL_MSG_FEATURES_GET``
  ``ETHTOOL_SFEATURES``               ``ETHTOOL_MSG_FEATURES_SET``
  ``ETHTOOL_GCHANNELS``               ``ETHTOOL_MSG_CHANNELS_GET``
  ``ETHTOOL_SCHANNELS``               ``ETHTOOL_MSG_CHANNELS_SET``
  ``ETHTOOL_SET_DUMP``                n/a
  ``ETHTOOL_GET_DUMP_FLAG``           n/a
  ``ETHTOOL_GET_DUMP_DATA``           n/a
  ``ETHTOOL_GET_TS_INFO``             ``ETHTOOL_MSG_TSINFO_GET``
  ``ETHTOOL_GMODULEINFO``             n/a
  ``ETHTOOL_GMODULEEEPROM``           n/a
  ``ETHTOOL_GEEE``                    ``ETHTOOL_MSG_EEE_GET``
  ``ETHTOOL_SEEE``                    ``ETHTOOL_MSG_EEE_SET``
  ``ETHTOOL_GRSSH``                   n/a
  ``ETHTOOL_SRSSH``                   n/a
  ``ETHTOOL_GTUNABLE``                n/a
  ``ETHTOOL_STUNABLE``                n/a
  ``ETHTOOL_GPHYSTATS``               n/a
  ``ETHTOOL_PERQUEUE``                n/a
  ``ETHTOOL_GLINKSETTINGS``           ``ETHTOOL_MSG_LINKINFO_GET``
                                      ``ETHTOOL_MSG_LINKMODES_GET``
  ``ETHTOOL_SLINKSETTINGS``           ``ETHTOOL_MSG_LINKINFO_SET``
                                      ``ETHTOOL_MSG_LINKMODES_SET``
  ``ETHTOOL_PHY_GTUNABLE``            n/a
  ``ETHTOOL_PHY_STUNABLE``            n/a
  ``ETHTOOL_GFECPARAM``               n/a
  ``ETHTOOL_SFECPARAM``               n/a
  n/a                                 ''ETHTOOL_MSG_CABLE_TEST_ACT''
  n/a                                 ''ETHTOOL_MSG_CABLE_TEST_TDR_ACT''
  =================================== =====================================