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tools: ynl: add sample for ethtool

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Configuring / reading ring sizes and counts is a fairly common
operation for ethtool netlink. Present a sample doing that with
YNL:

$ ./ethtool
Channels:
    enp1s0: combined 1
   eni1np1: combined 1
   eni2np1: combined 1
Rings:
    enp1s0: rx 256 tx 256
   eni1np1: rx 0 tx 0
   eni2np1: rx 0 tx 0

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2023-06-09 14:43:46 -07:00 committed by David S. Miller
parent 2d7be507d6
commit f561ff232a
2 changed files with 66 additions and 0 deletions
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1
tools/net/ynl/samples/.gitignore vendored
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@ -1,2 +1,3 @@
ethtool
devlink
netdev

65
tools/net/ynl/samples/ethtool.c Normal file
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@ -0,0 +1,65 @@
// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <string.h>
#include <ynl.h>
#include <net/if.h>
#include "ethtool-user.h"
int main(int argc, char **argv)
{
struct ethtool_channels_get_req_dump creq = {};
struct ethtool_rings_get_req_dump rreq = {};
struct ethtool_channels_get_list *channels;
struct ethtool_rings_get_list *rings;
struct ynl_sock *ys;
ys = ynl_sock_create(&ynl_ethtool_family, NULL);
if (!ys)
return 1;
creq._present.header = 1; /* ethtool needs an empty nest, sigh */
channels = ethtool_channels_get_dump(ys, &creq);
if (!channels)
goto err_close;
printf("Channels:\n");
ynl_dump_foreach(channels, dev) {
printf(" %8s: ", dev->header.dev_name);
if (dev->_present.rx_count)
printf("rx %d ", dev->rx_count);
if (dev->_present.tx_count)
printf("tx %d ", dev->tx_count);
if (dev->_present.combined_count)
printf("combined %d ", dev->combined_count);
printf("\n");
}
ethtool_channels_get_list_free(channels);
rreq._present.header = 1; /* ethtool needs an empty nest.. */
rings = ethtool_rings_get_dump(ys, &rreq);
if (!rings)
goto err_close;
printf("Rings:\n");
ynl_dump_foreach(rings, dev) {
printf(" %8s: ", dev->header.dev_name);
if (dev->_present.rx)
printf("rx %d ", dev->rx);
if (dev->_present.tx)
printf("tx %d ", dev->tx);
printf("\n");
}
ethtool_rings_get_list_free(rings);
ynl_sock_destroy(ys);
return 0;
err_close:
fprintf(stderr, "YNL (%d): %s\n", ys->err.code, ys->err.msg);
ynl_sock_destroy(ys);
return 2;
}