1 files changed, 141 insertions, 0 deletions
diff --git a/netlink/channels.c b/netlink/channels.c
new file mode 100644
index 0000000..894c74b
--- /dev/null
+++ b/netlink/channels.c
@@ -0,0 +1,141 @@
+/*
+ * 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(tb[ETHTOOL_A_CHANNELS_RX_MAX], "RX:\t\t");
+	show_u32(tb[ETHTOOL_A_CHANNELS_TX_MAX], "TX:\t\t");
+	show_u32(tb[ETHTOOL_A_CHANNELS_OTHER_MAX], "Other:\t\t");
+	show_u32(tb[ETHTOOL_A_CHANNELS_COMBINED_MAX], "Combined:\t");
+	printf("Current hardware settings:\n");
+	show_u32(tb[ETHTOOL_A_CHANNELS_RX_COUNT], "RX:\t\t");
+	show_u32(tb[ETHTOOL_A_CHANNELS_TX_COUNT], "TX:\t\t");
+	show_u32(tb[ETHTOOL_A_CHANNELS_OTHER_COUNT], "Other:\t\t");
+	show_u32(tb[ETHTOOL_A_CHANNELS_COMBINED_COUNT], "Combined:\t");
+
+	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;
+}