Based on kernel version 5.11. Page generated on 2021-02-15 21:59 EST.
| 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 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 |
=============================
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)
``ETHTOOL_FLAG_STATS`` include optional device statistics
================================= ===================================
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
``ETHTOOL_MSG_TUNNEL_INFO_GET`` get tunnel offload info
===================================== ================================
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
``ETHTOOL_MSG_TUNNEL_INFO_GET_REPLY`` tunnel offload info
===================================== =================================
``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
``ETHTOOL_A_PAUSE_STATS`` nested pause statistics
===================================== ====== ==========================
``ETHTOOL_A_PAUSE_STATS`` are reported if ``ETHTOOL_FLAG_STATS`` was set
in ``ETHTOOL_A_HEADER_FLAGS``.
It will be empty if driver did not report any statistics. Drivers fill in
the statistics in the following structure:
.. kernel-doc:: include/linux/ethtool.h
:identifiers: ethtool_pause_stats
Each member has a corresponding attribute defined.
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''
n/a ``ETHTOOL_MSG_TUNNEL_INFO_GET``
=================================== =====================================
|
