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/*
* channels.c - netlink implementation of channel commands
*
* Implementation of "ethtool -l <dev>" and "ethtool -L <dev> ..."
*/
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include "../internal.h"
#include "../common.h"
#include "netlink.h"
#include "parser.h"
/* CHANNELS_GET */
int channels_reply_cb(const struct nlmsghdr *nlhdr, void *data)
{
const struct nlattr *tb[ETHTOOL_A_CHANNELS_MAX + 1] = {};
DECLARE_ATTR_TB_INFO(tb);
struct nl_context *nlctx = data;
bool silent;
int err_ret;
int ret;
silent = nlctx->is_dump || nlctx->is_monitor;
err_ret = silent ? MNL_CB_OK : MNL_CB_ERROR;
ret = mnl_attr_parse(nlhdr, GENL_HDRLEN, attr_cb, &tb_info);
if (ret < 0)
return err_ret;
nlctx->devname = get_dev_name(tb[ETHTOOL_A_CHANNELS_HEADER]);
if (!dev_ok(nlctx))
return err_ret;
if (silent)
putchar('\n');
printf("Channel parameters for %s:\n", nlctx->devname);
printf("Pre-set maximums:\n");
show_u32("rx-max", "RX:\t\t", tb[ETHTOOL_A_CHANNELS_RX_MAX]);
show_u32("tx-max", "TX:\t\t", tb[ETHTOOL_A_CHANNELS_TX_MAX]);
show_u32("other-max", "Other:\t\t", tb[ETHTOOL_A_CHANNELS_OTHER_MAX]);
show_u32("combined-max", "Combined:\t",
tb[ETHTOOL_A_CHANNELS_COMBINED_MAX]);
printf("Current hardware settings:\n");
show_u32("rx", "RX:\t\t", tb[ETHTOOL_A_CHANNELS_RX_COUNT]);
show_u32("tx", "TX:\t\t", tb[ETHTOOL_A_CHANNELS_TX_COUNT]);
show_u32("other", "Other:\t\t", tb[ETHTOOL_A_CHANNELS_OTHER_COUNT]);
show_u32("combined", "Combined:\t",
tb[ETHTOOL_A_CHANNELS_COMBINED_COUNT]);
return MNL_CB_OK;
}
int nl_gchannels(struct cmd_context *ctx)
{
struct nl_context *nlctx = ctx->nlctx;
struct nl_socket *nlsk = nlctx->ethnl_socket;
int ret;
if (netlink_cmd_check(ctx, ETHTOOL_MSG_CHANNELS_GET, true))
return -EOPNOTSUPP;
if (ctx->argc > 0) {
fprintf(stderr, "ethtool: unexpected parameter '%s'\n",
*ctx->argp);
return 1;
}
ret = nlsock_prep_get_request(nlsk, ETHTOOL_MSG_CHANNELS_GET,
ETHTOOL_A_CHANNELS_HEADER, 0);
if (ret < 0)
return ret;
return nlsock_send_get_request(nlsk, channels_reply_cb);
}
/* CHANNELS_SET */
static const struct param_parser schannels_params[] = {
{
.arg = "rx",
.type = ETHTOOL_A_CHANNELS_RX_COUNT,
.handler = nl_parse_direct_u32,
.min_argc = 1,
},
{
.arg = "tx",
.type = ETHTOOL_A_CHANNELS_TX_COUNT,
.handler = nl_parse_direct_u32,
.min_argc = 1,
},
{
.arg = "other",
.type = ETHTOOL_A_CHANNELS_OTHER_COUNT,
.handler = nl_parse_direct_u32,
.min_argc = 1,
},
{
.arg = "combined",
.type = ETHTOOL_A_CHANNELS_COMBINED_COUNT,
.handler = nl_parse_direct_u32,
.min_argc = 1,
},
{}
};
int nl_schannels(struct cmd_context *ctx)
{
struct nl_context *nlctx = ctx->nlctx;
struct nl_msg_buff *msgbuff;
struct nl_socket *nlsk;
int ret;
if (netlink_cmd_check(ctx, ETHTOOL_MSG_CHANNELS_SET, false))
return -EOPNOTSUPP;
nlctx->cmd = "-L";
nlctx->argp = ctx->argp;
nlctx->argc = ctx->argc;
nlctx->devname = ctx->devname;
nlsk = nlctx->ethnl_socket;
msgbuff = &nlsk->msgbuff;
ret = msg_init(nlctx, msgbuff, ETHTOOL_MSG_CHANNELS_SET,
NLM_F_REQUEST | NLM_F_ACK);
if (ret < 0)
return 2;
if (ethnla_fill_header(msgbuff, ETHTOOL_A_CHANNELS_HEADER,
ctx->devname, 0))
return -EMSGSIZE;
ret = nl_parser(nlctx, schannels_params, NULL, PARSER_GROUP_NONE, NULL);
if (ret < 0)
return 1;
ret = nlsock_sendmsg(nlsk, NULL);
if (ret < 0)
return 1;
ret = nlsock_process_reply(nlsk, nomsg_reply_cb, nlctx);
if (ret == 0)
return 0;
else
return nlctx->exit_code ?: 1;
}
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