netdev - [PATCH ethtool-next v2 0/2] add netlink support for rss get

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Date:   Wed, 21 Dec 2022 16:13:41 -0800
From:   Sudheer Mogilappagari <sudheer.mogilappagari@...el.com>
To:     netdev@...r.kernel.org
Cc:     kuba@...nel.org, mkubecek@...e.cz, andrew@...n.ch, corbet@....net,
        sridhar.samudrala@...el.com, anthony.l.nguyen@...el.com
Subject: [PATCH ethtool-next v2 0/2] add netlink support for rss get

These patches add netlink based handler to fetch RSS information
using "ethtool -x <eth> [context %d]" command.

Output without --json option
$ethtool -x eno2
RX flow hash indirection table for eno2 with 8 RX ring(s):
    0:      0     0     0     0     0     0     0     0
    8:      0     0     0     0     0     0     0     0
   16:      1     1     1     1     1     1     1     1
   ...skip similar lines...
  120:      7     7     7     7     7     7     7     7
RSS hash key:
be:c3:13:a6:59:9a:c3:c5:d8:60:75:2b:4c:b2:12:cc:5c:4e:34:
8a:f9:ab:16:c7:19:5d:ab:1d:b5:c1:c7:57:c7:a2:e1:2b:e3:ea:
02:60:88:8e:96:ef:2d:64:d2:de:2c:16:72:b6
RSS hash function:
    toeplitz: on
    xor: off
    crc32: off

Output with --json option
$ethtool --json -x eno2
[ {
    "ifname": "eno2",
    "RSS indirection table": [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2
    ...skip similar lines...
    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7 ],
    "RSS hash Key": "be:c3:13:a6:59:9a:c3:c5:d8:60:75:2b:4c:
    b2:12:cc:5c:4e:34:8a:f9:ab:16:c7:19:5d:ab:1d:b5:c1:c7:57:
    c7:a2:e1:2b:e3:ea:02:60:88:8e:96:ef:2d:64:d2:de:2c:16:72:b6",
    "RSS hash function": {
            "toeplitz": "on",
            "xor": "off",
            "crc32": "off"
        }
    } ]

Signed-off-by: Sudheer Mogilappagari <sudheer.mogilappagari@...el.com>
---
v2:
-Added json support
---
Sudheer Mogilappagari (2):
  Move code that print rss info into common file
  netlink: add netlink handler for get rss (-x)

 Makefile.am            |   2 +-
 common.c               |  43 +++++++
 common.h               |   7 ++
 ethtool.c              |  46 +------
 netlink/desc-ethtool.c |  11 ++
 netlink/extapi.h       |   2 +
 netlink/rss.c          | 272 +++++++++++++++++++++++++++++++++++++++++
 7 files changed, 342 insertions(+), 41 deletions(-)
 create mode 100644 netlink/rss.c

-- 
2.31.1