1 =============================
2 Netlink interface for ethtool
3 =============================
9 Netlink interface for ethtool uses generic netlink family ``ethtool``
10 (userspace application should use macros ``ETHTOOL_GENL_NAME`` and
11 ``ETHTOOL_GENL_VERSION`` defined in ``<linux/ethtool_netlink.h>`` uapi
12 header). This family does not use a specific header, all information in
13 requests and replies is passed using netlink attributes.
15 The ethtool netlink interface uses extended ACK for error and warning
16 reporting, userspace application developers are encouraged to make these
17 messages available to user in a suitable way.
19 Requests can be divided into three categories: "get" (retrieving information),
20 "set" (setting parameters) and "action" (invoking an action).
22 All "set" and "action" type requests require admin privileges
23 (``CAP_NET_ADMIN`` in the namespace). Most "get" type requests are allowed for
24 anyone but there are exceptions (where the response contains sensitive
25 information). In some cases, the request as such is allowed for anyone but
26 unprivileged users have attributes with sensitive information (e.g.
27 wake-on-lan password) omitted.
33 Attributes which represent a boolean value usually use NLA_U8 type so that we
34 can distinguish three states: "on", "off" and "not present" (meaning the
35 information is not available in "get" requests or value is not to be changed
36 in "set" requests). For these attributes, the "true" value should be passed as
37 number 1 but any non-zero value should be understood as "true" by recipient.
38 In the tables below, "bool" denotes NLA_U8 attributes interpreted in this way.
40 In the message structure descriptions below, if an attribute name is suffixed
41 with "+", parent nest can contain multiple attributes of the same type. This
42 implements an array of entries.
48 Each request or reply message contains a nested attribute with common header.
49 Structure of this header is
51 ============================== ====== =============================
52 ``ETHTOOL_A_HEADER_DEV_INDEX`` u32 device ifindex
53 ``ETHTOOL_A_HEADER_DEV_NAME`` string device name
54 ``ETHTOOL_A_HEADER_FLAGS`` u32 flags common for all requests
55 ============================== ====== =============================
57 ``ETHTOOL_A_HEADER_DEV_INDEX`` and ``ETHTOOL_A_HEADER_DEV_NAME`` identify the
58 device message relates to. One of them is sufficient in requests, if both are
59 used, they must identify the same device. Some requests, e.g. global string
60 sets, do not require device identification. Most ``GET`` requests also allow
61 dump requests without device identification to query the same information for
62 all devices providing it (each device in a separate message).
64 ``ETHTOOL_A_HEADER_FLAGS`` is a bitmap of request flags common for all request
65 types. The interpretation of these flags is the same for all request types but
66 the flags may not apply to requests. Recognized flags are:
68 ================================= ===================================
69 ``ETHTOOL_FLAG_COMPACT_BITSETS`` use compact format bitsets in reply
70 ``ETHTOOL_FLAG_OMIT_REPLY`` omit optional reply (_SET and _ACT)
71 ================================= ===================================
73 New request flags should follow the general idea that if the flag is not set,
74 the behaviour is backward compatible, i.e. requests from old clients not aware
75 of the flag should be interpreted the way the client expects. A client must
76 not set flags it does not understand.
82 For short bitmaps of (reasonably) fixed length, standard ``NLA_BITFIELD32``
83 type is used. For arbitrary length bitmaps, ethtool netlink uses a nested
84 attribute with contents of one of two forms: compact (two binary bitmaps
85 representing bit values and mask of affected bits) and bit-by-bit (list of
86 bits identified by either index or name).
88 Verbose (bit-by-bit) bitsets allow sending symbolic names for bits together
89 with their values which saves a round trip (when the bitset is passed in a
90 request) or at least a second request (when the bitset is in a reply). This is
91 useful for one shot applications like traditional ethtool command. On the
92 other hand, long running applications like ethtool monitor (displaying
93 notifications) or network management daemons may prefer fetching the names
94 only once and using compact form to save message size. Notifications from
95 ethtool netlink interface always use compact form for bitsets.
97 A bitset can represent either a value/mask pair (``ETHTOOL_A_BITSET_NOMASK``
98 not set) or a single bitmap (``ETHTOOL_A_BITSET_NOMASK`` set). In requests
99 modifying a bitmap, the former changes the bit set in mask to values set in
100 value and preserves the rest; the latter sets the bits set in the bitmap and
103 Compact form: nested (bitset) atrribute contents:
105 ============================ ====== ============================
106 ``ETHTOOL_A_BITSET_NOMASK`` flag no mask, only a list
107 ``ETHTOOL_A_BITSET_SIZE`` u32 number of significant bits
108 ``ETHTOOL_A_BITSET_VALUE`` binary bitmap of bit values
109 ``ETHTOOL_A_BITSET_MASK`` binary bitmap of valid bits
110 ============================ ====== ============================
112 Value and mask must have length at least ``ETHTOOL_A_BITSET_SIZE`` bits
113 rounded up to a multiple of 32 bits. They consist of 32-bit words in host byte
114 order, words ordered from least significant to most significant (i.e. the same
115 way as bitmaps are passed with ioctl interface).
117 For compact form, ``ETHTOOL_A_BITSET_SIZE`` and ``ETHTOOL_A_BITSET_VALUE`` are
118 mandatory. ``ETHTOOL_A_BITSET_MASK`` attribute is mandatory if
119 ``ETHTOOL_A_BITSET_NOMASK`` is not set (bitset represents a value/mask pair);
120 if ``ETHTOOL_A_BITSET_NOMASK`` is not set, ``ETHTOOL_A_BITSET_MASK`` is not
121 allowed (bitset represents a single bitmap.
123 Kernel bit set length may differ from userspace length if older application is
124 used on newer kernel or vice versa. If userspace bitmap is longer, an error is
125 issued only if the request actually tries to set values of some bits not
126 recognized by kernel.
128 Bit-by-bit form: nested (bitset) attribute contents:
130 +------------------------------------+--------+-----------------------------+
131 | ``ETHTOOL_A_BITSET_NOMASK`` | flag | no mask, only a list |
132 +------------------------------------+--------+-----------------------------+
133 | ``ETHTOOL_A_BITSET_SIZE`` | u32 | number of significant bits |
134 +------------------------------------+--------+-----------------------------+
135 | ``ETHTOOL_A_BITSET_BITS`` | nested | array of bits |
136 +-+----------------------------------+--------+-----------------------------+
137 | | ``ETHTOOL_A_BITSET_BITS_BIT+`` | nested | one bit |
138 +-+-+--------------------------------+--------+-----------------------------+
139 | | | ``ETHTOOL_A_BITSET_BIT_INDEX`` | u32 | bit index (0 for LSB) |
140 +-+-+--------------------------------+--------+-----------------------------+
141 | | | ``ETHTOOL_A_BITSET_BIT_NAME`` | string | bit name |
142 +-+-+--------------------------------+--------+-----------------------------+
143 | | | ``ETHTOOL_A_BITSET_BIT_VALUE`` | flag | present if bit is set |
144 +-+-+--------------------------------+--------+-----------------------------+
146 Bit size is optional for bit-by-bit form. ``ETHTOOL_A_BITSET_BITS`` nest can
147 only contain ``ETHTOOL_A_BITSET_BITS_BIT`` attributes but there can be an
148 arbitrary number of them. A bit may be identified by its index or by its
149 name. When used in requests, listed bits are set to 0 or 1 according to
150 ``ETHTOOL_A_BITSET_BIT_VALUE``, the rest is preserved. A request fails if
151 index exceeds kernel bit length or if name is not recognized.
153 When ``ETHTOOL_A_BITSET_NOMASK`` flag is present, bitset is interpreted as
154 a simple bitmap. ``ETHTOOL_A_BITSET_BIT_VALUE`` attributes are not used in
155 such case. Such bitset represents a bitmap with listed bits set and the rest
158 In requests, application can use either form. Form used by kernel in reply is
159 determined by ``ETHTOOL_FLAG_COMPACT_BITSETS`` flag in flags field of request
160 header. Semantics of value and mask depends on the attribute.
163 List of message types
164 =====================
166 All constants identifying message types use ``ETHTOOL_CMD_`` prefix and suffix
167 according to message purpose:
169 ============== ======================================
170 ``_GET`` userspace request to retrieve data
171 ``_SET`` userspace request to set data
172 ``_ACT`` userspace request to perform an action
173 ``_GET_REPLY`` kernel reply to a ``GET`` request
174 ``_SET_REPLY`` kernel reply to a ``SET`` request
175 ``_ACT_REPLY`` kernel reply to an ``ACT`` request
176 ``_NTF`` kernel notification
177 ============== ======================================
181 ===================================== ================================
182 ``ETHTOOL_MSG_STRSET_GET`` get string set
183 ``ETHTOOL_MSG_LINKINFO_GET`` get link settings
184 ``ETHTOOL_MSG_LINKINFO_SET`` set link settings
185 ``ETHTOOL_MSG_LINKMODES_GET`` get link modes info
186 ``ETHTOOL_MSG_LINKMODES_SET`` set link modes info
187 ``ETHTOOL_MSG_LINKSTATE_GET`` get link state
188 ``ETHTOOL_MSG_DEBUG_GET`` get debugging settings
189 ``ETHTOOL_MSG_DEBUG_SET`` set debugging settings
190 ``ETHTOOL_MSG_WOL_GET`` get wake-on-lan settings
191 ``ETHTOOL_MSG_WOL_SET`` set wake-on-lan settings
192 ``ETHTOOL_MSG_FEATURES_GET`` get device features
193 ``ETHTOOL_MSG_FEATURES_SET`` set device features
194 ``ETHTOOL_MSG_PRIVFLAGS_GET`` get private flags
195 ``ETHTOOL_MSG_PRIVFLAGS_SET`` set private flags
196 ``ETHTOOL_MSG_RINGS_GET`` get ring sizes
197 ``ETHTOOL_MSG_RINGS_SET`` set ring sizes
198 ``ETHTOOL_MSG_CHANNELS_GET`` get channel counts
199 ``ETHTOOL_MSG_CHANNELS_SET`` set channel counts
200 ``ETHTOOL_MSG_COALESCE_GET`` get coalescing parameters
201 ``ETHTOOL_MSG_COALESCE_SET`` set coalescing parameters
202 ``ETHTOOL_MSG_PAUSE_GET`` get pause parameters
203 ``ETHTOOL_MSG_PAUSE_SET`` set pause parameters
204 ``ETHTOOL_MSG_EEE_GET`` get EEE settings
205 ``ETHTOOL_MSG_EEE_SET`` set EEE settings
206 ``ETHTOOL_MSG_TSINFO_GET`` get timestamping info
207 ``ETHTOOL_MSG_CABLE_TEST_ACT`` action start cable test
208 ``ETHTOOL_MSG_CABLE_TEST_TDR_ACT`` action start raw TDR cable test
209 ===================================== ================================
213 ===================================== =================================
214 ``ETHTOOL_MSG_STRSET_GET_REPLY`` string set contents
215 ``ETHTOOL_MSG_LINKINFO_GET_REPLY`` link settings
216 ``ETHTOOL_MSG_LINKINFO_NTF`` link settings notification
217 ``ETHTOOL_MSG_LINKMODES_GET_REPLY`` link modes info
218 ``ETHTOOL_MSG_LINKMODES_NTF`` link modes notification
219 ``ETHTOOL_MSG_LINKSTATE_GET_REPLY`` link state info
220 ``ETHTOOL_MSG_DEBUG_GET_REPLY`` debugging settings
221 ``ETHTOOL_MSG_DEBUG_NTF`` debugging settings notification
222 ``ETHTOOL_MSG_WOL_GET_REPLY`` wake-on-lan settings
223 ``ETHTOOL_MSG_WOL_NTF`` wake-on-lan settings notification
224 ``ETHTOOL_MSG_FEATURES_GET_REPLY`` device features
225 ``ETHTOOL_MSG_FEATURES_SET_REPLY`` optional reply to FEATURES_SET
226 ``ETHTOOL_MSG_FEATURES_NTF`` netdev features notification
227 ``ETHTOOL_MSG_PRIVFLAGS_GET_REPLY`` private flags
228 ``ETHTOOL_MSG_PRIVFLAGS_NTF`` private flags
229 ``ETHTOOL_MSG_RINGS_GET_REPLY`` ring sizes
230 ``ETHTOOL_MSG_RINGS_NTF`` ring sizes
231 ``ETHTOOL_MSG_CHANNELS_GET_REPLY`` channel counts
232 ``ETHTOOL_MSG_CHANNELS_NTF`` channel counts
233 ``ETHTOOL_MSG_COALESCE_GET_REPLY`` coalescing parameters
234 ``ETHTOOL_MSG_COALESCE_NTF`` coalescing parameters
235 ``ETHTOOL_MSG_PAUSE_GET_REPLY`` pause parameters
236 ``ETHTOOL_MSG_PAUSE_NTF`` pause parameters
237 ``ETHTOOL_MSG_EEE_GET_REPLY`` EEE settings
238 ``ETHTOOL_MSG_EEE_NTF`` EEE settings
239 ``ETHTOOL_MSG_TSINFO_GET_REPLY`` timestamping info
240 ``ETHTOOL_MSG_CABLE_TEST_NTF`` Cable test results
241 ``ETHTOOL_MSG_CABLE_TEST_TDR_NTF`` Cable test TDR results
242 ===================================== =================================
244 ``GET`` requests are sent by userspace applications to retrieve device
245 information. They usually do not contain any message specific attributes.
246 Kernel replies with corresponding "GET_REPLY" message. For most types, ``GET``
247 request with ``NLM_F_DUMP`` and no device identification can be used to query
248 the information for all devices supporting the request.
250 If the data can be also modified, corresponding ``SET`` message with the same
251 layout as corresponding ``GET_REPLY`` is used to request changes. Only
252 attributes where a change is requested are included in such request (also, not
253 all attributes may be changed). Replies to most ``SET`` request consist only
254 of error code and extack; if kernel provides additional data, it is sent in
255 the form of corresponding ``SET_REPLY`` message which can be suppressed by
256 setting ``ETHTOOL_FLAG_OMIT_REPLY`` flag in request header.
258 Data modification also triggers sending a ``NTF`` message with a notification.
259 These usually bear only a subset of attributes which was affected by the
260 change. The same notification is issued if the data is modified using other
261 means (mostly ioctl ethtool interface). Unlike notifications from ethtool
262 netlink code which are only sent if something actually changed, notifications
263 triggered by ioctl interface may be sent even if the request did not actually
266 ``ACT`` messages request kernel (driver) to perform a specific action. If some
267 information is reported by kernel (which can be suppressed by setting
268 ``ETHTOOL_FLAG_OMIT_REPLY`` flag in request header), the reply takes form of
269 an ``ACT_REPLY`` message. Performing an action also triggers a notification
272 Later sections describe the format and semantics of these messages.
278 Requests contents of a string set as provided by ioctl commands
279 ``ETHTOOL_GSSET_INFO`` and ``ETHTOOL_GSTRINGS.`` String sets are not user
280 writeable so that the corresponding ``STRSET_SET`` message is only used in
281 kernel replies. There are two types of string sets: global (independent of
282 a device, e.g. device feature names) and device specific (e.g. device private
287 +---------------------------------------+--------+------------------------+
288 | ``ETHTOOL_A_STRSET_HEADER`` | nested | request header |
289 +---------------------------------------+--------+------------------------+
290 | ``ETHTOOL_A_STRSET_STRINGSETS`` | nested | string set to request |
291 +-+-------------------------------------+--------+------------------------+
292 | | ``ETHTOOL_A_STRINGSETS_STRINGSET+`` | nested | one string set |
293 +-+-+-----------------------------------+--------+------------------------+
294 | | | ``ETHTOOL_A_STRINGSET_ID`` | u32 | set id |
295 +-+-+-----------------------------------+--------+------------------------+
297 Kernel response contents:
299 +---------------------------------------+--------+-----------------------+
300 | ``ETHTOOL_A_STRSET_HEADER`` | nested | reply header |
301 +---------------------------------------+--------+-----------------------+
302 | ``ETHTOOL_A_STRSET_STRINGSETS`` | nested | array of string sets |
303 +-+-------------------------------------+--------+-----------------------+
304 | | ``ETHTOOL_A_STRINGSETS_STRINGSET+`` | nested | one string set |
305 +-+-+-----------------------------------+--------+-----------------------+
306 | | | ``ETHTOOL_A_STRINGSET_ID`` | u32 | set id |
307 +-+-+-----------------------------------+--------+-----------------------+
308 | | | ``ETHTOOL_A_STRINGSET_COUNT`` | u32 | number of strings |
309 +-+-+-----------------------------------+--------+-----------------------+
310 | | | ``ETHTOOL_A_STRINGSET_STRINGS`` | nested | array of strings |
311 +-+-+-+---------------------------------+--------+-----------------------+
312 | | | | ``ETHTOOL_A_STRINGS_STRING+`` | nested | one string |
313 +-+-+-+-+-------------------------------+--------+-----------------------+
314 | | | | | ``ETHTOOL_A_STRING_INDEX`` | u32 | string index |
315 +-+-+-+-+-------------------------------+--------+-----------------------+
316 | | | | | ``ETHTOOL_A_STRING_VALUE`` | string | string value |
317 +-+-+-+-+-------------------------------+--------+-----------------------+
318 | ``ETHTOOL_A_STRSET_COUNTS_ONLY`` | flag | return only counts |
319 +---------------------------------------+--------+-----------------------+
321 Device identification in request header is optional. Depending on its presence
322 a and ``NLM_F_DUMP`` flag, there are three type of ``STRSET_GET`` requests:
324 - no ``NLM_F_DUMP,`` no device: get "global" stringsets
325 - no ``NLM_F_DUMP``, with device: get string sets related to the device
326 - ``NLM_F_DUMP``, no device: get device related string sets for all devices
328 If there is no ``ETHTOOL_A_STRSET_STRINGSETS`` array, all string sets of
329 requested type are returned, otherwise only those specified in the request.
330 Flag ``ETHTOOL_A_STRSET_COUNTS_ONLY`` tells kernel to only return string
331 counts of the sets, not the actual strings.
337 Requests link settings as provided by ``ETHTOOL_GLINKSETTINGS`` except for
338 link modes and autonegotiation related information. The request does not use
343 ==================================== ====== ==========================
344 ``ETHTOOL_A_LINKINFO_HEADER`` nested request header
345 ==================================== ====== ==========================
347 Kernel response contents:
349 ==================================== ====== ==========================
350 ``ETHTOOL_A_LINKINFO_HEADER`` nested reply header
351 ``ETHTOOL_A_LINKINFO_PORT`` u8 physical port
352 ``ETHTOOL_A_LINKINFO_PHYADDR`` u8 phy MDIO address
353 ``ETHTOOL_A_LINKINFO_TP_MDIX`` u8 MDI(-X) status
354 ``ETHTOOL_A_LINKINFO_TP_MDIX_CTRL`` u8 MDI(-X) control
355 ``ETHTOOL_A_LINKINFO_TRANSCEIVER`` u8 transceiver
356 ==================================== ====== ==========================
358 Attributes and their values have the same meaning as matching members of the
359 corresponding ioctl structures.
361 ``LINKINFO_GET`` allows dump requests (kernel returns reply message for all
362 devices supporting the request).
368 ``LINKINFO_SET`` request allows setting some of the attributes reported by
373 ==================================== ====== ==========================
374 ``ETHTOOL_A_LINKINFO_HEADER`` nested request header
375 ``ETHTOOL_A_LINKINFO_PORT`` u8 physical port
376 ``ETHTOOL_A_LINKINFO_PHYADDR`` u8 phy MDIO address
377 ``ETHTOOL_A_LINKINFO_TP_MDIX_CTRL`` u8 MDI(-X) control
378 ==================================== ====== ==========================
380 MDI(-X) status and transceiver cannot be set, request with the corresponding
381 attributes is rejected.
387 Requests link modes (supported, advertised and peer advertised) and related
388 information (autonegotiation status, link speed and duplex) as provided by
389 ``ETHTOOL_GLINKSETTINGS``. The request does not use any attributes.
393 ==================================== ====== ==========================
394 ``ETHTOOL_A_LINKMODES_HEADER`` nested request header
395 ==================================== ====== ==========================
397 Kernel response contents:
399 ========================================== ====== ==========================
400 ``ETHTOOL_A_LINKMODES_HEADER`` nested reply header
401 ``ETHTOOL_A_LINKMODES_AUTONEG`` u8 autonegotiation status
402 ``ETHTOOL_A_LINKMODES_OURS`` bitset advertised link modes
403 ``ETHTOOL_A_LINKMODES_PEER`` bitset partner link modes
404 ``ETHTOOL_A_LINKMODES_SPEED`` u32 link speed (Mb/s)
405 ``ETHTOOL_A_LINKMODES_DUPLEX`` u8 duplex mode
406 ``ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG`` u8 Master/slave port mode
407 ``ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE`` u8 Master/slave port state
408 ========================================== ====== ==========================
410 For ``ETHTOOL_A_LINKMODES_OURS``, value represents advertised modes and mask
411 represents supported modes. ``ETHTOOL_A_LINKMODES_PEER`` in the reply is a bit
414 ``LINKMODES_GET`` allows dump requests (kernel returns reply messages for all
415 devices supporting the request).
423 ========================================== ====== ==========================
424 ``ETHTOOL_A_LINKMODES_HEADER`` nested request header
425 ``ETHTOOL_A_LINKMODES_AUTONEG`` u8 autonegotiation status
426 ``ETHTOOL_A_LINKMODES_OURS`` bitset advertised link modes
427 ``ETHTOOL_A_LINKMODES_PEER`` bitset partner link modes
428 ``ETHTOOL_A_LINKMODES_SPEED`` u32 link speed (Mb/s)
429 ``ETHTOOL_A_LINKMODES_DUPLEX`` u8 duplex mode
430 ``ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG`` u8 Master/slave port mode
431 ========================================== ====== ==========================
433 ``ETHTOOL_A_LINKMODES_OURS`` bit set allows setting advertised link modes. If
434 autonegotiation is on (either set now or kept from before), advertised modes
435 are not changed (no ``ETHTOOL_A_LINKMODES_OURS`` attribute) and at least one
436 of speed and duplex is specified, kernel adjusts advertised modes to all
437 supported modes matching speed, duplex or both (whatever is specified). This
438 autoselection is done on ethtool side with ioctl interface, netlink interface
439 is supposed to allow requesting changes without knowing what exactly kernel
446 Requests link state information. At the moment, only link up/down flag (as
447 provided by ``ETHTOOL_GLINK`` ioctl command) is provided but some future
448 extensions are planned (e.g. link down reason). This request does not have any
453 ==================================== ====== ==========================
454 ``ETHTOOL_A_LINKSTATE_HEADER`` nested request header
455 ==================================== ====== ==========================
457 Kernel response contents:
459 ==================================== ====== ============================
460 ``ETHTOOL_A_LINKSTATE_HEADER`` nested reply header
461 ``ETHTOOL_A_LINKSTATE_LINK`` bool link state (up/down)
462 ``ETHTOOL_A_LINKSTATE_SQI`` u32 Current Signal Quality Index
463 ``ETHTOOL_A_LINKSTATE_SQI_MAX`` u32 Max support SQI value
464 ==================================== ====== ============================
466 For most NIC drivers, the value of ``ETHTOOL_A_LINKSTATE_LINK`` returns
467 carrier flag provided by ``netif_carrier_ok()`` but there are drivers which
468 define their own handler.
470 ``LINKSTATE_GET`` allows dump requests (kernel returns reply messages for all
471 devices supporting the request).
477 Requests debugging settings of a device. At the moment, only message mask is
482 ==================================== ====== ==========================
483 ``ETHTOOL_A_DEBUG_HEADER`` nested request header
484 ==================================== ====== ==========================
486 Kernel response contents:
488 ==================================== ====== ==========================
489 ``ETHTOOL_A_DEBUG_HEADER`` nested reply header
490 ``ETHTOOL_A_DEBUG_MSGMASK`` bitset message mask
491 ==================================== ====== ==========================
493 The message mask (``ETHTOOL_A_DEBUG_MSGMASK``) is equal to message level as
494 provided by ``ETHTOOL_GMSGLVL`` and set by ``ETHTOOL_SMSGLVL`` in ioctl
495 interface. While it is called message level there for historical reasons, most
496 drivers and almost all newer drivers use it as a mask of enabled message
497 classes (represented by ``NETIF_MSG_*`` constants); therefore netlink
498 interface follows its actual use in practice.
500 ``DEBUG_GET`` allows dump requests (kernel returns reply messages for all
501 devices supporting the request).
507 Set or update debugging settings of a device. At the moment, only message mask
512 ==================================== ====== ==========================
513 ``ETHTOOL_A_DEBUG_HEADER`` nested request header
514 ``ETHTOOL_A_DEBUG_MSGMASK`` bitset message mask
515 ==================================== ====== ==========================
517 ``ETHTOOL_A_DEBUG_MSGMASK`` bit set allows setting or modifying mask of
518 enabled debugging message types for the device.
524 Query device wake-on-lan settings. Unlike most "GET" type requests,
525 ``ETHTOOL_MSG_WOL_GET`` requires (netns) ``CAP_NET_ADMIN`` privileges as it
526 (potentially) provides SecureOn(tm) password which is confidential.
530 ==================================== ====== ==========================
531 ``ETHTOOL_A_WOL_HEADER`` nested request header
532 ==================================== ====== ==========================
534 Kernel response contents:
536 ==================================== ====== ==========================
537 ``ETHTOOL_A_WOL_HEADER`` nested reply header
538 ``ETHTOOL_A_WOL_MODES`` bitset mask of enabled WoL modes
539 ``ETHTOOL_A_WOL_SOPASS`` binary SecureOn(tm) password
540 ==================================== ====== ==========================
542 In reply, ``ETHTOOL_A_WOL_MODES`` mask consists of modes supported by the
543 device, value of modes which are enabled. ``ETHTOOL_A_WOL_SOPASS`` is only
544 included in reply if ``WAKE_MAGICSECURE`` mode is supported.
550 Set or update wake-on-lan settings.
554 ==================================== ====== ==========================
555 ``ETHTOOL_A_WOL_HEADER`` nested request header
556 ``ETHTOOL_A_WOL_MODES`` bitset enabled WoL modes
557 ``ETHTOOL_A_WOL_SOPASS`` binary SecureOn(tm) password
558 ==================================== ====== ==========================
560 ``ETHTOOL_A_WOL_SOPASS`` is only allowed for devices supporting
561 ``WAKE_MAGICSECURE`` mode.
567 Gets netdev features like ``ETHTOOL_GFEATURES`` ioctl request.
571 ==================================== ====== ==========================
572 ``ETHTOOL_A_FEATURES_HEADER`` nested request header
573 ==================================== ====== ==========================
575 Kernel response contents:
577 ==================================== ====== ==========================
578 ``ETHTOOL_A_FEATURES_HEADER`` nested reply header
579 ``ETHTOOL_A_FEATURES_HW`` bitset dev->hw_features
580 ``ETHTOOL_A_FEATURES_WANTED`` bitset dev->wanted_features
581 ``ETHTOOL_A_FEATURES_ACTIVE`` bitset dev->features
582 ``ETHTOOL_A_FEATURES_NOCHANGE`` bitset NETIF_F_NEVER_CHANGE
583 ==================================== ====== ==========================
585 Bitmaps in kernel response have the same meaning as bitmaps used in ioctl
586 interference but attribute names are different (they are based on
587 corresponding members of struct net_device). Legacy "flags" are not provided,
588 if userspace needs them (most likely only ethtool for backward compatibility),
589 it can calculate their values from related feature bits itself.
590 ETHA_FEATURES_HW uses mask consisting of all features recognized by kernel (to
591 provide all names when using verbose bitmap format), the other three use no
592 mask (simple bit lists).
598 Request to set netdev features like ``ETHTOOL_SFEATURES`` ioctl request.
602 ==================================== ====== ==========================
603 ``ETHTOOL_A_FEATURES_HEADER`` nested request header
604 ``ETHTOOL_A_FEATURES_WANTED`` bitset requested features
605 ==================================== ====== ==========================
607 Kernel response contents:
609 ==================================== ====== ==========================
610 ``ETHTOOL_A_FEATURES_HEADER`` nested reply header
611 ``ETHTOOL_A_FEATURES_WANTED`` bitset diff wanted vs. result
612 ``ETHTOOL_A_FEATURES_ACTIVE`` bitset diff old vs. new active
613 ==================================== ====== ==========================
615 Request constains only one bitset which can be either value/mask pair (request
616 to change specific feature bits and leave the rest) or only a value (request
617 to set all features to specified set).
619 As request is subject to netdev_change_features() sanity checks, optional
620 kernel reply (can be suppressed by ``ETHTOOL_FLAG_OMIT_REPLY`` flag in request
621 header) informs client about the actual result. ``ETHTOOL_A_FEATURES_WANTED``
622 reports the difference between client request and actual result: mask consists
623 of bits which differ between requested features and result (dev->features
624 after the operation), value consists of values of these bits in the request
625 (i.e. negated values from resulting features). ``ETHTOOL_A_FEATURES_ACTIVE``
626 reports the difference between old and new dev->features: mask consists of
627 bits which have changed, values are their values in new dev->features (after
630 ``ETHTOOL_MSG_FEATURES_NTF`` notification is sent not only if device features
631 are modified using ``ETHTOOL_MSG_FEATURES_SET`` request or on of ethtool ioctl
632 request but also each time features are modified with netdev_update_features()
633 or netdev_change_features().
639 Gets private flags like ``ETHTOOL_GPFLAGS`` ioctl request.
643 ==================================== ====== ==========================
644 ``ETHTOOL_A_PRIVFLAGS_HEADER`` nested request header
645 ==================================== ====== ==========================
647 Kernel response contents:
649 ==================================== ====== ==========================
650 ``ETHTOOL_A_PRIVFLAGS_HEADER`` nested reply header
651 ``ETHTOOL_A_PRIVFLAGS_FLAGS`` bitset private flags
652 ==================================== ====== ==========================
654 ``ETHTOOL_A_PRIVFLAGS_FLAGS`` is a bitset with values of device private flags.
655 These flags are defined by driver, their number and names (and also meaning)
656 are device dependent. For compact bitset format, names can be retrieved as
657 ``ETH_SS_PRIV_FLAGS`` string set. If verbose bitset format is requested,
658 response uses all private flags supported by the device as mask so that client
659 gets the full information without having to fetch the string set with names.
665 Sets or modifies values of device private flags like ``ETHTOOL_SPFLAGS``
670 ==================================== ====== ==========================
671 ``ETHTOOL_A_PRIVFLAGS_HEADER`` nested request header
672 ``ETHTOOL_A_PRIVFLAGS_FLAGS`` bitset private flags
673 ==================================== ====== ==========================
675 ``ETHTOOL_A_PRIVFLAGS_FLAGS`` can either set the whole set of private flags or
676 modify only values of some of them.
682 Gets ring sizes like ``ETHTOOL_GRINGPARAM`` ioctl request.
686 ==================================== ====== ==========================
687 ``ETHTOOL_A_RINGS_HEADER`` nested request header
688 ==================================== ====== ==========================
690 Kernel response contents:
692 ==================================== ====== ==========================
693 ``ETHTOOL_A_RINGS_HEADER`` nested reply header
694 ``ETHTOOL_A_RINGS_RX_MAX`` u32 max size of RX ring
695 ``ETHTOOL_A_RINGS_RX_MINI_MAX`` u32 max size of RX mini ring
696 ``ETHTOOL_A_RINGS_RX_JUMBO_MAX`` u32 max size of RX jumbo ring
697 ``ETHTOOL_A_RINGS_TX_MAX`` u32 max size of TX ring
698 ``ETHTOOL_A_RINGS_RX`` u32 size of RX ring
699 ``ETHTOOL_A_RINGS_RX_MINI`` u32 size of RX mini ring
700 ``ETHTOOL_A_RINGS_RX_JUMBO`` u32 size of RX jumbo ring
701 ``ETHTOOL_A_RINGS_TX`` u32 size of TX ring
702 ==================================== ====== ==========================
708 Sets ring sizes like ``ETHTOOL_SRINGPARAM`` ioctl request.
712 ==================================== ====== ==========================
713 ``ETHTOOL_A_RINGS_HEADER`` nested reply header
714 ``ETHTOOL_A_RINGS_RX`` u32 size of RX ring
715 ``ETHTOOL_A_RINGS_RX_MINI`` u32 size of RX mini ring
716 ``ETHTOOL_A_RINGS_RX_JUMBO`` u32 size of RX jumbo ring
717 ``ETHTOOL_A_RINGS_TX`` u32 size of TX ring
718 ==================================== ====== ==========================
720 Kernel checks that requested ring sizes do not exceed limits reported by
721 driver. Driver may impose additional constraints and may not suspport all
728 Gets channel counts like ``ETHTOOL_GCHANNELS`` ioctl request.
732 ==================================== ====== ==========================
733 ``ETHTOOL_A_CHANNELS_HEADER`` nested request header
734 ==================================== ====== ==========================
736 Kernel response contents:
738 ===================================== ====== ==========================
739 ``ETHTOOL_A_CHANNELS_HEADER`` nested reply header
740 ``ETHTOOL_A_CHANNELS_RX_MAX`` u32 max receive channels
741 ``ETHTOOL_A_CHANNELS_TX_MAX`` u32 max transmit channels
742 ``ETHTOOL_A_CHANNELS_OTHER_MAX`` u32 max other channels
743 ``ETHTOOL_A_CHANNELS_COMBINED_MAX`` u32 max combined channels
744 ``ETHTOOL_A_CHANNELS_RX_COUNT`` u32 receive channel count
745 ``ETHTOOL_A_CHANNELS_TX_COUNT`` u32 transmit channel count
746 ``ETHTOOL_A_CHANNELS_OTHER_COUNT`` u32 other channel count
747 ``ETHTOOL_A_CHANNELS_COMBINED_COUNT`` u32 combined channel count
748 ===================================== ====== ==========================
754 Sets channel counts like ``ETHTOOL_SCHANNELS`` ioctl request.
758 ===================================== ====== ==========================
759 ``ETHTOOL_A_CHANNELS_HEADER`` nested request header
760 ``ETHTOOL_A_CHANNELS_RX_COUNT`` u32 receive channel count
761 ``ETHTOOL_A_CHANNELS_TX_COUNT`` u32 transmit channel count
762 ``ETHTOOL_A_CHANNELS_OTHER_COUNT`` u32 other channel count
763 ``ETHTOOL_A_CHANNELS_COMBINED_COUNT`` u32 combined channel count
764 ===================================== ====== ==========================
766 Kernel checks that requested channel counts do not exceed limits reported by
767 driver. Driver may impose additional constraints and may not suspport all
774 Gets coalescing parameters like ``ETHTOOL_GCOALESCE`` ioctl request.
778 ==================================== ====== ==========================
779 ``ETHTOOL_A_COALESCE_HEADER`` nested request header
780 ==================================== ====== ==========================
782 Kernel response contents:
784 =========================================== ====== =======================
785 ``ETHTOOL_A_COALESCE_HEADER`` nested reply header
786 ``ETHTOOL_A_COALESCE_RX_USECS`` u32 delay (us), normal Rx
787 ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES`` u32 max packets, normal Rx
788 ``ETHTOOL_A_COALESCE_RX_USECS_IRQ`` u32 delay (us), Rx in IRQ
789 ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ`` u32 max packets, Rx in IRQ
790 ``ETHTOOL_A_COALESCE_TX_USECS`` u32 delay (us), normal Tx
791 ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES`` u32 max packets, normal Tx
792 ``ETHTOOL_A_COALESCE_TX_USECS_IRQ`` u32 delay (us), Tx in IRQ
793 ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ`` u32 IRQ packets, Tx in IRQ
794 ``ETHTOOL_A_COALESCE_STATS_BLOCK_USECS`` u32 delay of stats update
795 ``ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX`` bool adaptive Rx coalesce
796 ``ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX`` bool adaptive Tx coalesce
797 ``ETHTOOL_A_COALESCE_PKT_RATE_LOW`` u32 threshold for low rate
798 ``ETHTOOL_A_COALESCE_RX_USECS_LOW`` u32 delay (us), low Rx
799 ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW`` u32 max packets, low Rx
800 ``ETHTOOL_A_COALESCE_TX_USECS_LOW`` u32 delay (us), low Tx
801 ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW`` u32 max packets, low Tx
802 ``ETHTOOL_A_COALESCE_PKT_RATE_HIGH`` u32 threshold for high rate
803 ``ETHTOOL_A_COALESCE_RX_USECS_HIGH`` u32 delay (us), high Rx
804 ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH`` u32 max packets, high Rx
805 ``ETHTOOL_A_COALESCE_TX_USECS_HIGH`` u32 delay (us), high Tx
806 ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH`` u32 max packets, high Tx
807 ``ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL`` u32 rate sampling interval
808 =========================================== ====== =======================
810 Attributes are only included in reply if their value is not zero or the
811 corresponding bit in ``ethtool_ops::supported_coalesce_params`` is set (i.e.
812 they are declared as supported by driver).
818 Sets coalescing parameters like ``ETHTOOL_SCOALESCE`` ioctl request.
822 =========================================== ====== =======================
823 ``ETHTOOL_A_COALESCE_HEADER`` nested request header
824 ``ETHTOOL_A_COALESCE_RX_USECS`` u32 delay (us), normal Rx
825 ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES`` u32 max packets, normal Rx
826 ``ETHTOOL_A_COALESCE_RX_USECS_IRQ`` u32 delay (us), Rx in IRQ
827 ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_IRQ`` u32 max packets, Rx in IRQ
828 ``ETHTOOL_A_COALESCE_TX_USECS`` u32 delay (us), normal Tx
829 ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES`` u32 max packets, normal Tx
830 ``ETHTOOL_A_COALESCE_TX_USECS_IRQ`` u32 delay (us), Tx in IRQ
831 ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ`` u32 IRQ packets, Tx in IRQ
832 ``ETHTOOL_A_COALESCE_STATS_BLOCK_USECS`` u32 delay of stats update
833 ``ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX`` bool adaptive Rx coalesce
834 ``ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX`` bool adaptive Tx coalesce
835 ``ETHTOOL_A_COALESCE_PKT_RATE_LOW`` u32 threshold for low rate
836 ``ETHTOOL_A_COALESCE_RX_USECS_LOW`` u32 delay (us), low Rx
837 ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_LOW`` u32 max packets, low Rx
838 ``ETHTOOL_A_COALESCE_TX_USECS_LOW`` u32 delay (us), low Tx
839 ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_LOW`` u32 max packets, low Tx
840 ``ETHTOOL_A_COALESCE_PKT_RATE_HIGH`` u32 threshold for high rate
841 ``ETHTOOL_A_COALESCE_RX_USECS_HIGH`` u32 delay (us), high Rx
842 ``ETHTOOL_A_COALESCE_RX_MAX_FRAMES_HIGH`` u32 max packets, high Rx
843 ``ETHTOOL_A_COALESCE_TX_USECS_HIGH`` u32 delay (us), high Tx
844 ``ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH`` u32 max packets, high Tx
845 ``ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL`` u32 rate sampling interval
846 =========================================== ====== =======================
848 Request is rejected if it attributes declared as unsupported by driver (i.e.
849 such that the corresponding bit in ``ethtool_ops::supported_coalesce_params``
850 is not set), regardless of their values. Driver may impose additional
851 constraints on coalescing parameters and their values.
857 Gets channel counts like ``ETHTOOL_GPAUSE`` ioctl request.
861 ===================================== ====== ==========================
862 ``ETHTOOL_A_PAUSE_HEADER`` nested request header
863 ===================================== ====== ==========================
865 Kernel response contents:
867 ===================================== ====== ==========================
868 ``ETHTOOL_A_PAUSE_HEADER`` nested request header
869 ``ETHTOOL_A_PAUSE_AUTONEG`` bool pause autonegotiation
870 ``ETHTOOL_A_PAUSE_RX`` bool receive pause frames
871 ``ETHTOOL_A_PAUSE_TX`` bool transmit pause frames
872 ===================================== ====== ==========================
878 Sets pause parameters like ``ETHTOOL_GPAUSEPARAM`` ioctl request.
882 ===================================== ====== ==========================
883 ``ETHTOOL_A_PAUSE_HEADER`` nested request header
884 ``ETHTOOL_A_PAUSE_AUTONEG`` bool pause autonegotiation
885 ``ETHTOOL_A_PAUSE_RX`` bool receive pause frames
886 ``ETHTOOL_A_PAUSE_TX`` bool transmit pause frames
887 ===================================== ====== ==========================
893 Gets channel counts like ``ETHTOOL_GEEE`` ioctl request.
897 ===================================== ====== ==========================
898 ``ETHTOOL_A_EEE_HEADER`` nested request header
899 ===================================== ====== ==========================
901 Kernel response contents:
903 ===================================== ====== ==========================
904 ``ETHTOOL_A_EEE_HEADER`` nested request header
905 ``ETHTOOL_A_EEE_MODES_OURS`` bool supported/advertised modes
906 ``ETHTOOL_A_EEE_MODES_PEER`` bool peer advertised link modes
907 ``ETHTOOL_A_EEE_ACTIVE`` bool EEE is actively used
908 ``ETHTOOL_A_EEE_ENABLED`` bool EEE is enabled
909 ``ETHTOOL_A_EEE_TX_LPI_ENABLED`` bool Tx lpi enabled
910 ``ETHTOOL_A_EEE_TX_LPI_TIMER`` u32 Tx lpi timeout (in us)
911 ===================================== ====== ==========================
913 In ``ETHTOOL_A_EEE_MODES_OURS``, mask consists of link modes for which EEE is
914 enabled, value of link modes for which EEE is advertised. Link modes for which
915 peer advertises EEE are listed in ``ETHTOOL_A_EEE_MODES_PEER`` (no mask). The
916 netlink interface allows reporting EEE status for all link modes but only
917 first 32 are provided by the ``ethtool_ops`` callback.
923 Sets pause parameters like ``ETHTOOL_GEEEPARAM`` ioctl request.
927 ===================================== ====== ==========================
928 ``ETHTOOL_A_EEE_HEADER`` nested request header
929 ``ETHTOOL_A_EEE_MODES_OURS`` bool advertised modes
930 ``ETHTOOL_A_EEE_ENABLED`` bool EEE is enabled
931 ``ETHTOOL_A_EEE_TX_LPI_ENABLED`` bool Tx lpi enabled
932 ``ETHTOOL_A_EEE_TX_LPI_TIMER`` u32 Tx lpi timeout (in us)
933 ===================================== ====== ==========================
935 ``ETHTOOL_A_EEE_MODES_OURS`` is used to either list link modes to advertise
936 EEE for (if there is no mask) or specify changes to the list (if there is
937 a mask). The netlink interface allows reporting EEE status for all link modes
938 but only first 32 can be set at the moment as that is what the ``ethtool_ops``
945 Gets timestamping information like ``ETHTOOL_GET_TS_INFO`` ioctl request.
949 ===================================== ====== ==========================
950 ``ETHTOOL_A_TSINFO_HEADER`` nested request header
951 ===================================== ====== ==========================
953 Kernel response contents:
955 ===================================== ====== ==========================
956 ``ETHTOOL_A_TSINFO_HEADER`` nested request header
957 ``ETHTOOL_A_TSINFO_TIMESTAMPING`` bitset SO_TIMESTAMPING flags
958 ``ETHTOOL_A_TSINFO_TX_TYPES`` bitset supported Tx types
959 ``ETHTOOL_A_TSINFO_RX_FILTERS`` bitset supported Rx filters
960 ``ETHTOOL_A_TSINFO_PHC_INDEX`` u32 PTP hw clock index
961 ===================================== ====== ==========================
963 ``ETHTOOL_A_TSINFO_PHC_INDEX`` is absent if there is no associated PHC (there
964 is no special value for this case). The bitset attributes are omitted if they
965 would be empty (no bit set).
974 ==================================== ====== ==========================
975 ``ETHTOOL_A_CABLE_TEST_HEADER`` nested request header
976 ==================================== ====== ==========================
978 Notification contents:
980 An Ethernet cable typically contains 1, 2 or 4 pairs. The length of
981 the pair can only be measured when there is a fault in the pair and
982 hence a reflection. Information about the fault may not be available,
983 depending on the specific hardware. Hence the contents of the notify
984 message are mostly optional. The attributes can be repeated an
985 arbitrary number of times, in an arbitrary order, for an arbitrary
988 The example shows the notification sent when the test is completed for
989 a T2 cable, i.e. two pairs. One pair is OK and hence has no length
990 information. The second pair has a fault and does have length
993 +---------------------------------------------+--------+---------------------+
994 | ``ETHTOOL_A_CABLE_TEST_HEADER`` | nested | reply header |
995 +---------------------------------------------+--------+---------------------+
996 | ``ETHTOOL_A_CABLE_TEST_STATUS`` | u8 | completed |
997 +---------------------------------------------+--------+---------------------+
998 | ``ETHTOOL_A_CABLE_TEST_NTF_NEST`` | nested | all the results |
999 +-+-------------------------------------------+--------+---------------------+
1000 | | ``ETHTOOL_A_CABLE_NEST_RESULT`` | nested | cable test result |
1001 +-+-+-----------------------------------------+--------+---------------------+
1002 | | | ``ETHTOOL_A_CABLE_RESULTS_PAIR`` | u8 | pair number |
1003 +-+-+-----------------------------------------+--------+---------------------+
1004 | | | ``ETHTOOL_A_CABLE_RESULTS_CODE`` | u8 | result code |
1005 +-+-+-----------------------------------------+--------+---------------------+
1006 | | ``ETHTOOL_A_CABLE_NEST_RESULT`` | nested | cable test results |
1007 +-+-+-----------------------------------------+--------+---------------------+
1008 | | | ``ETHTOOL_A_CABLE_RESULTS_PAIR`` | u8 | pair number |
1009 +-+-+-----------------------------------------+--------+---------------------+
1010 | | | ``ETHTOOL_A_CABLE_RESULTS_CODE`` | u8 | result code |
1011 +-+-+-----------------------------------------+--------+---------------------+
1012 | | ``ETHTOOL_A_CABLE_NEST_FAULT_LENGTH`` | nested | cable length |
1013 +-+-+-----------------------------------------+--------+---------------------+
1014 | | | ``ETHTOOL_A_CABLE_FAULT_LENGTH_PAIR`` | u8 | pair number |
1015 +-+-+-----------------------------------------+--------+---------------------+
1016 | | | ``ETHTOOL_A_CABLE_FAULT_LENGTH_CM`` | u32 | length in cm |
1017 +-+-+-----------------------------------------+--------+---------------------+
1022 Start a cable test and report raw TDR data
1026 +--------------------------------------------+--------+-----------------------+
1027 | ``ETHTOOL_A_CABLE_TEST_TDR_HEADER`` | nested | reply header |
1028 +--------------------------------------------+--------+-----------------------+
1029 | ``ETHTOOL_A_CABLE_TEST_TDR_CFG`` | nested | test configuration |
1030 +-+------------------------------------------+--------+-----------------------+
1031 | | ``ETHTOOL_A_CABLE_STEP_FIRST_DISTANCE`` | u32 | first data distance |
1032 +-+-+----------------------------------------+--------+-----------------------+
1033 | | ``ETHTOOL_A_CABLE_STEP_LAST_DISTANCE`` | u32 | last data distance |
1034 +-+-+----------------------------------------+--------+-----------------------+
1035 | | ``ETHTOOL_A_CABLE_STEP_STEP_DISTANCE`` | u32 | distance of each step |
1036 +-+-+----------------------------------------+--------+-----------------------+
1037 | | ``ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR`` | u8 | pair to test |
1038 +-+-+----------------------------------------+--------+-----------------------+
1040 The ETHTOOL_A_CABLE_TEST_TDR_CFG is optional, as well as all members
1041 of the nest. All distances are expressed in centimeters. The PHY takes
1042 the distances as a guide, and rounds to the nearest distance it
1043 actually supports. If a pair is passed, only that one pair will be
1044 tested. Otherwise all pairs are tested.
1046 Notification contents:
1048 Raw TDR data is gathered by sending a pulse down the cable and
1049 recording the amplitude of the reflected pulse for a given distance.
1051 It can take a number of seconds to collect TDR data, especial if the
1052 full 100 meters is probed at 1 meter intervals. When the test is
1053 started a notification will be sent containing just
1054 ETHTOOL_A_CABLE_TEST_TDR_STATUS with the value
1055 ETHTOOL_A_CABLE_TEST_NTF_STATUS_STARTED.
1057 When the test has completed a second notification will be sent
1058 containing ETHTOOL_A_CABLE_TEST_TDR_STATUS with the value
1059 ETHTOOL_A_CABLE_TEST_NTF_STATUS_COMPLETED and the TDR data.
1061 The message may optionally contain the amplitude of the pulse send
1062 down the cable. This is measured in mV. A reflection should not be
1063 bigger than transmitted pulse.
1065 Before the raw TDR data should be an ETHTOOL_A_CABLE_TDR_NEST_STEP
1066 nest containing information about the distance along the cable for the
1067 first reading, the last reading, and the step between each
1068 reading. Distances are measured in centimeters. These should be the
1069 exact values the PHY used. These may be different to what the user
1070 requested, if the native measurement resolution is greater than 1 cm.
1072 For each step along the cable, a ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE is
1073 used to report the amplitude of the reflection for a given pair.
1075 +---------------------------------------------+--------+----------------------+
1076 | ``ETHTOOL_A_CABLE_TEST_TDR_HEADER`` | nested | reply header |
1077 +---------------------------------------------+--------+----------------------+
1078 | ``ETHTOOL_A_CABLE_TEST_TDR_STATUS`` | u8 | completed |
1079 +---------------------------------------------+--------+----------------------+
1080 | ``ETHTOOL_A_CABLE_TEST_TDR_NTF_NEST`` | nested | all the results |
1081 +-+-------------------------------------------+--------+----------------------+
1082 | | ``ETHTOOL_A_CABLE_TDR_NEST_PULSE`` | nested | TX Pulse amplitude |
1083 +-+-+-----------------------------------------+--------+----------------------+
1084 | | | ``ETHTOOL_A_CABLE_PULSE_mV`` | s16 | Pulse amplitude |
1085 +-+-+-----------------------------------------+--------+----------------------+
1086 | | ``ETHTOOL_A_CABLE_NEST_STEP`` | nested | TDR step info |
1087 +-+-+-----------------------------------------+--------+----------------------+
1088 | | | ``ETHTOOL_A_CABLE_STEP_FIRST_DISTANCE`` | u32 | First data distance |
1089 +-+-+-----------------------------------------+--------+----------------------+
1090 | | | ``ETHTOOL_A_CABLE_STEP_LAST_DISTANCE`` | u32 | Last data distance |
1091 +-+-+-----------------------------------------+--------+----------------------+
1092 | | | ``ETHTOOL_A_CABLE_STEP_STEP_DISTANCE`` | u32 | distance of each step|
1093 +-+-+-----------------------------------------+--------+----------------------+
1094 | | ``ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE`` | nested | Reflection amplitude |
1095 +-+-+-----------------------------------------+--------+----------------------+
1096 | | | ``ETHTOOL_A_CABLE_RESULTS_PAIR`` | u8 | pair number |
1097 +-+-+-----------------------------------------+--------+----------------------+
1098 | | | ``ETHTOOL_A_CABLE_AMPLITUDE_mV`` | s16 | Reflection amplitude |
1099 +-+-+-----------------------------------------+--------+----------------------+
1100 | | ``ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE`` | nested | Reflection amplitude |
1101 +-+-+-----------------------------------------+--------+----------------------+
1102 | | | ``ETHTOOL_A_CABLE_RESULTS_PAIR`` | u8 | pair number |
1103 +-+-+-----------------------------------------+--------+----------------------+
1104 | | | ``ETHTOOL_A_CABLE_AMPLITUDE_mV`` | s16 | Reflection amplitude |
1105 +-+-+-----------------------------------------+--------+----------------------+
1106 | | ``ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE`` | nested | Reflection amplitude |
1107 +-+-+-----------------------------------------+--------+----------------------+
1108 | | | ``ETHTOOL_A_CABLE_RESULTS_PAIR`` | u8 | pair number |
1109 +-+-+-----------------------------------------+--------+----------------------+
1110 | | | ``ETHTOOL_A_CABLE_AMPLITUDE_mV`` | s16 | Reflection amplitude |
1111 +-+-+-----------------------------------------+--------+----------------------+
1116 The following table maps ioctl commands to netlink commands providing their
1117 functionality. Entries with "n/a" in right column are commands which do not
1118 have their netlink replacement yet. Entries which "n/a" in the left column
1121 =================================== =====================================
1122 ioctl command netlink command
1123 =================================== =====================================
1124 ``ETHTOOL_GSET`` ``ETHTOOL_MSG_LINKINFO_GET``
1125 ``ETHTOOL_MSG_LINKMODES_GET``
1126 ``ETHTOOL_SSET`` ``ETHTOOL_MSG_LINKINFO_SET``
1127 ``ETHTOOL_MSG_LINKMODES_SET``
1128 ``ETHTOOL_GDRVINFO`` n/a
1129 ``ETHTOOL_GREGS`` n/a
1130 ``ETHTOOL_GWOL`` ``ETHTOOL_MSG_WOL_GET``
1131 ``ETHTOOL_SWOL`` ``ETHTOOL_MSG_WOL_SET``
1132 ``ETHTOOL_GMSGLVL`` ``ETHTOOL_MSG_DEBUG_GET``
1133 ``ETHTOOL_SMSGLVL`` ``ETHTOOL_MSG_DEBUG_SET``
1134 ``ETHTOOL_NWAY_RST`` n/a
1135 ``ETHTOOL_GLINK`` ``ETHTOOL_MSG_LINKSTATE_GET``
1136 ``ETHTOOL_GEEPROM`` n/a
1137 ``ETHTOOL_SEEPROM`` n/a
1138 ``ETHTOOL_GCOALESCE`` ``ETHTOOL_MSG_COALESCE_GET``
1139 ``ETHTOOL_SCOALESCE`` ``ETHTOOL_MSG_COALESCE_SET``
1140 ``ETHTOOL_GRINGPARAM`` ``ETHTOOL_MSG_RINGS_GET``
1141 ``ETHTOOL_SRINGPARAM`` ``ETHTOOL_MSG_RINGS_SET``
1142 ``ETHTOOL_GPAUSEPARAM`` ``ETHTOOL_MSG_PAUSE_GET``
1143 ``ETHTOOL_SPAUSEPARAM`` ``ETHTOOL_MSG_PAUSE_SET``
1144 ``ETHTOOL_GRXCSUM`` ``ETHTOOL_MSG_FEATURES_GET``
1145 ``ETHTOOL_SRXCSUM`` ``ETHTOOL_MSG_FEATURES_SET``
1146 ``ETHTOOL_GTXCSUM`` ``ETHTOOL_MSG_FEATURES_GET``
1147 ``ETHTOOL_STXCSUM`` ``ETHTOOL_MSG_FEATURES_SET``
1148 ``ETHTOOL_GSG`` ``ETHTOOL_MSG_FEATURES_GET``
1149 ``ETHTOOL_SSG`` ``ETHTOOL_MSG_FEATURES_SET``
1150 ``ETHTOOL_TEST`` n/a
1151 ``ETHTOOL_GSTRINGS`` ``ETHTOOL_MSG_STRSET_GET``
1152 ``ETHTOOL_PHYS_ID`` n/a
1153 ``ETHTOOL_GSTATS`` n/a
1154 ``ETHTOOL_GTSO`` ``ETHTOOL_MSG_FEATURES_GET``
1155 ``ETHTOOL_STSO`` ``ETHTOOL_MSG_FEATURES_SET``
1156 ``ETHTOOL_GPERMADDR`` rtnetlink ``RTM_GETLINK``
1157 ``ETHTOOL_GUFO`` ``ETHTOOL_MSG_FEATURES_GET``
1158 ``ETHTOOL_SUFO`` ``ETHTOOL_MSG_FEATURES_SET``
1159 ``ETHTOOL_GGSO`` ``ETHTOOL_MSG_FEATURES_GET``
1160 ``ETHTOOL_SGSO`` ``ETHTOOL_MSG_FEATURES_SET``
1161 ``ETHTOOL_GFLAGS`` ``ETHTOOL_MSG_FEATURES_GET``
1162 ``ETHTOOL_SFLAGS`` ``ETHTOOL_MSG_FEATURES_SET``
1163 ``ETHTOOL_GPFLAGS`` ``ETHTOOL_MSG_PRIVFLAGS_GET``
1164 ``ETHTOOL_SPFLAGS`` ``ETHTOOL_MSG_PRIVFLAGS_SET``
1165 ``ETHTOOL_GRXFH`` n/a
1166 ``ETHTOOL_SRXFH`` n/a
1167 ``ETHTOOL_GGRO`` ``ETHTOOL_MSG_FEATURES_GET``
1168 ``ETHTOOL_SGRO`` ``ETHTOOL_MSG_FEATURES_SET``
1169 ``ETHTOOL_GRXRINGS`` n/a
1170 ``ETHTOOL_GRXCLSRLCNT`` n/a
1171 ``ETHTOOL_GRXCLSRULE`` n/a
1172 ``ETHTOOL_GRXCLSRLALL`` n/a
1173 ``ETHTOOL_SRXCLSRLDEL`` n/a
1174 ``ETHTOOL_SRXCLSRLINS`` n/a
1175 ``ETHTOOL_FLASHDEV`` n/a
1176 ``ETHTOOL_RESET`` n/a
1177 ``ETHTOOL_SRXNTUPLE`` n/a
1178 ``ETHTOOL_GRXNTUPLE`` n/a
1179 ``ETHTOOL_GSSET_INFO`` ``ETHTOOL_MSG_STRSET_GET``
1180 ``ETHTOOL_GRXFHINDIR`` n/a
1181 ``ETHTOOL_SRXFHINDIR`` n/a
1182 ``ETHTOOL_GFEATURES`` ``ETHTOOL_MSG_FEATURES_GET``
1183 ``ETHTOOL_SFEATURES`` ``ETHTOOL_MSG_FEATURES_SET``
1184 ``ETHTOOL_GCHANNELS`` ``ETHTOOL_MSG_CHANNELS_GET``
1185 ``ETHTOOL_SCHANNELS`` ``ETHTOOL_MSG_CHANNELS_SET``
1186 ``ETHTOOL_SET_DUMP`` n/a
1187 ``ETHTOOL_GET_DUMP_FLAG`` n/a
1188 ``ETHTOOL_GET_DUMP_DATA`` n/a
1189 ``ETHTOOL_GET_TS_INFO`` ``ETHTOOL_MSG_TSINFO_GET``
1190 ``ETHTOOL_GMODULEINFO`` n/a
1191 ``ETHTOOL_GMODULEEEPROM`` n/a
1192 ``ETHTOOL_GEEE`` ``ETHTOOL_MSG_EEE_GET``
1193 ``ETHTOOL_SEEE`` ``ETHTOOL_MSG_EEE_SET``
1194 ``ETHTOOL_GRSSH`` n/a
1195 ``ETHTOOL_SRSSH`` n/a
1196 ``ETHTOOL_GTUNABLE`` n/a
1197 ``ETHTOOL_STUNABLE`` n/a
1198 ``ETHTOOL_GPHYSTATS`` n/a
1199 ``ETHTOOL_PERQUEUE`` n/a
1200 ``ETHTOOL_GLINKSETTINGS`` ``ETHTOOL_MSG_LINKINFO_GET``
1201 ``ETHTOOL_MSG_LINKMODES_GET``
1202 ``ETHTOOL_SLINKSETTINGS`` ``ETHTOOL_MSG_LINKINFO_SET``
1203 ``ETHTOOL_MSG_LINKMODES_SET``
1204 ``ETHTOOL_PHY_GTUNABLE`` n/a
1205 ``ETHTOOL_PHY_STUNABLE`` n/a
1206 ``ETHTOOL_GFECPARAM`` n/a
1207 ``ETHTOOL_SFECPARAM`` n/a
1208 n/a ''ETHTOOL_MSG_CABLE_TEST_ACT''
1209 n/a ''ETHTOOL_MSG_CABLE_TEST_TDR_ACT''
1210 =================================== =====================================