1 files changed, 296 insertions, 0 deletions
diff --git a/netlink/plca.c b/netlink/plca.c
new file mode 100644
index 0000000..7d61e3b
--- /dev/null
+++ b/netlink/plca.c
@@ -0,0 +1,296 @@
+/*
+ * plca.c - netlink implementation of plca command
+ *
+ * Implementation of "ethtool --show-plca <dev>" and
+ * "ethtool --set-plca <dev> ..."
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "../internal.h"
+#include "../common.h"
+#include "netlink.h"
+#include "bitset.h"
+#include "parser.h"
+
+/* PLCA_GET_CFG */
+
+int plca_get_cfg_reply_cb(const struct nlmsghdr *nlhdr, void *data)
+{
+	const struct nlattr *tb[ETHTOOL_A_PLCA_MAX + 1] = {};
+	DECLARE_ATTR_TB_INFO(tb);
+	struct nl_context *nlctx = data;
+	bool silent;
+	int idv = 255;
+	int err_ret;
+	int val;
+	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_PLCA_HEADER]);
+	if (!dev_ok(nlctx))
+		return err_ret;
+
+	if (silent)
+		putchar('\n');
+
+	printf("PLCA settings for %s:\n", nlctx->devname);
+
+	// check if PLCA is enabled
+	printf("\tEnabled: ");
+
+	if (!tb[ETHTOOL_A_PLCA_ENABLED]) {
+		printf("not supported");
+	} else {
+		val = mnl_attr_get_u8(tb[ETHTOOL_A_PLCA_ENABLED]);
+		printf(val ? "Yes" : "No");
+	}
+	putchar('\n');
+
+	// get node ID
+	printf("\tlocal node ID: ");
+
+	if (!tb[ETHTOOL_A_PLCA_NODE_ID]) {
+		printf("not supported");
+	} else {
+		idv = mnl_attr_get_u32(tb[ETHTOOL_A_PLCA_NODE_ID]);
+		printf("%u (%s)", idv,
+		       idv == 0 ? "coordinator" :
+		       idv == 255 ? "unconfigured" : "follower");
+	}
+	putchar('\n');
+
+	// get node count
+	printf("\tNode count: ");
+	if (!tb[ETHTOOL_A_PLCA_NODE_CNT]) {
+		printf("not supported");
+	} else {
+		val = mnl_attr_get_u32(tb[ETHTOOL_A_PLCA_NODE_CNT]);
+		printf("%u", val);
+
+		// The node count is ignored by follower nodes. However, it can
+		// be pre-set to enable fast coordinator role switchover.
+		// Therefore, on a follower node we still wanto to show it,
+		// indicating it is not currently used.
+		if (tb[ETHTOOL_A_PLCA_NODE_ID] && idv != 0)
+			printf(" (ignored)");
+	}
+	putchar('\n');
+
+	// get TO timer (transmit opportunity timer)
+	printf("\tTO timer: ");
+	if (!tb[ETHTOOL_A_PLCA_TO_TMR]) {
+		printf("not supported");
+	} else {
+		val = mnl_attr_get_u32(tb[ETHTOOL_A_PLCA_TO_TMR]);
+		printf("%u BT", val);
+	}
+	putchar('\n');
+
+	// get burst count
+	printf("\tBurst count: ");
+	if (!tb[ETHTOOL_A_PLCA_BURST_CNT]) {
+		printf("not supported");
+	} else {
+		val = mnl_attr_get_u32(tb[ETHTOOL_A_PLCA_BURST_CNT]);
+		printf("%u (%s)", val,
+		       val > 0 ? "enabled" : "disabled");
+	}
+	putchar('\n');
+
+	// get burst timer
+	printf("\tBurst timer: ");
+	if (!tb[ETHTOOL_A_PLCA_BURST_TMR]) {
+		printf("not supported");
+	} else {
+		val = mnl_attr_get_u32(tb[ETHTOOL_A_PLCA_BURST_TMR]);
+		printf("%u BT", val);
+	}
+	putchar('\n');
+
+	return MNL_CB_OK;
+}
+
+
+int nl_plca_get_cfg(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_PLCA_GET_CFG, 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_PLCA_GET_CFG,
+				      ETHTOOL_A_PLCA_HEADER, 0);
+
+	if (ret < 0)
+		return ret;
+
+	return nlsock_send_get_request(nlsk, plca_get_cfg_reply_cb);
+}
+
+/* PLCA_SET_CFG */
+
+static const struct param_parser set_plca_params[] = {
+	{
+		.arg		= "enable",
+		.type		= ETHTOOL_A_PLCA_ENABLED,
+		.handler	= nl_parse_u8bool,
+		.min_argc	= 1,
+	},
+	{
+		.arg		= "node-id",
+		.type		= ETHTOOL_A_PLCA_NODE_ID,
+		.handler	= nl_parse_direct_u32,
+		.min_argc	= 1,
+	},
+	{
+		.arg		= "node-cnt",
+		.type		= ETHTOOL_A_PLCA_NODE_CNT,
+		.handler	= nl_parse_direct_u32,
+		.min_argc	= 1,
+	},
+	{
+		.arg		= "to-tmr",
+		.type		= ETHTOOL_A_PLCA_TO_TMR,
+		.handler	= nl_parse_direct_u32,
+		.min_argc	= 1,
+	},
+	{
+		.arg		= "burst-cnt",
+		.type		= ETHTOOL_A_PLCA_BURST_CNT,
+		.handler	= nl_parse_direct_u32,
+		.min_argc	= 1,
+	},
+	{
+		.arg		= "burst-tmr",
+		.type		= ETHTOOL_A_PLCA_BURST_TMR,
+		.handler	= nl_parse_direct_u32,
+		.min_argc	= 1,
+	},
+	{}
+};
+
+int nl_plca_set_cfg(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_PLCA_SET_CFG, false))
+		return -EOPNOTSUPP;
+	if (!ctx->argc) {
+		fprintf(stderr,
+			"ethtool (--set-plca-cfg): parameters missing\n");
+		return 1;
+	}
+
+	nlctx->cmd = "--set-plca-cfg";
+	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_PLCA_SET_CFG,
+		       NLM_F_REQUEST | NLM_F_ACK);
+	if (ret < 0)
+		return 2;
+	if (ethnla_fill_header(msgbuff, ETHTOOL_A_PLCA_HEADER,
+			       ctx->devname, 0))
+		return -EMSGSIZE;
+
+	ret = nl_parser(nlctx, set_plca_params, NULL, PARSER_GROUP_NONE, NULL);
+	if (ret < 0)
+		return 1;
+
+	ret = nlsock_sendmsg(nlsk, NULL);
+	if (ret < 0)
+		return 76;
+	ret = nlsock_process_reply(nlsk, nomsg_reply_cb, nlctx);
+	if (ret == 0)
+		return 0;
+	else
+		return nlctx->exit_code ?: 76;
+}
+
+/* PLCA_GET_STATUS */
+
+int plca_get_status_reply_cb(const struct nlmsghdr *nlhdr, void *data)
+{
+	const struct nlattr *tb[ETHTOOL_A_PLCA_MAX + 1] = {};
+	DECLARE_ATTR_TB_INFO(tb);
+	struct nl_context *nlctx = data;
+	bool silent;
+	int err_ret;
+	int ret;
+	u8 val;
+
+	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_PLCA_HEADER]);
+	if (!dev_ok(nlctx))
+		return err_ret;
+
+	if (silent)
+		putchar('\n');
+
+	printf("PLCA status of %s:\n", nlctx->devname);
+
+	// check whether the Open Alliance TC14 standard memory map is supported
+	printf("\tStatus: ");
+
+	if (!tb[ETHTOOL_A_PLCA_STATUS]) {
+		printf("not supported");
+	} else {
+		val = mnl_attr_get_u8(tb[ETHTOOL_A_PLCA_STATUS]);
+		printf(val ? "on" : "off");
+	}
+	putchar('\n');
+
+	return MNL_CB_OK;
+}
+
+
+int nl_plca_get_status(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_PLCA_GET_STATUS, 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_PLCA_GET_STATUS,
+				      ETHTOOL_A_PLCA_HEADER, 0);
+
+	if (ret < 0)
+		return ret;
+
+	return nlsock_send_get_request(nlsk, plca_get_status_reply_cb);
+}