examples/ip_pipeline: add link command

Add the functionality to track links in the application. This enables the
user to print the name, mac address and statistics for each link
in the application.

Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>

examples/ip_pipeline/cli.c

@@ -9,6 +9,7 @@
 
 #include <rte_common.h>
 #include <rte_cycles.h>
+#include <rte_ethdev.h>
 
 #include "cli.h"
 #include "kni.h"
@@ -237,6 +238,91 @@ cmd_link(char **tokens,
 	}
 }
 
+/* Print the link stats and info */
+static void
+print_link_info(struct link *link, char *out, size_t out_size)
+{
+	struct rte_eth_stats stats;
+	struct ether_addr mac_addr;
+	struct rte_eth_link eth_link;
+	uint16_t mtu;
+
+	memset(&stats, 0, sizeof(stats));
+	rte_eth_stats_get(link->port_id, &stats);
+
+	rte_eth_macaddr_get(link->port_id, &mac_addr);
+	rte_eth_link_get(link->port_id, &eth_link);
+	rte_eth_dev_get_mtu(link->port_id, &mtu);
+
+	snprintf(out, out_size,
+		"\n"
+		"%s: flags=<%s> mtu %u\n"
+		"\tether %02X:%02X:%02X:%02X:%02X:%02X rxqueues %u txqueues %u\n"
+		"\tport# %u  speed %u Mbps\n"
+		"\tRX packets %" PRIu64"  bytes %" PRIu64"\n"
+		"\tRX errors %" PRIu64"  missed %" PRIu64"  no-mbuf %" PRIu64"\n"
+		"\tTX packets %" PRIu64"  bytes %" PRIu64"\n"
+		"\tTX errors %" PRIu64"\n",
+		link->name,
+		eth_link.link_status == 0 ? "DOWN" : "UP",
+		mtu,
+		mac_addr.addr_bytes[0], mac_addr.addr_bytes[1],
+		mac_addr.addr_bytes[2], mac_addr.addr_bytes[3],
+		mac_addr.addr_bytes[4], mac_addr.addr_bytes[5],
+		link->n_rxq,
+		link->n_txq,
+		link->port_id,
+		eth_link.link_speed,
+		stats.ipackets,
+		stats.ibytes,
+		stats.ierrors,
+		stats.imissed,
+		stats.rx_nombuf,
+		stats.opackets,
+		stats.obytes,
+		stats.oerrors);
+}
+
+/*
+ * link show [<link_name>]
+ */
+static void
+cmd_link_show(char **tokens, uint32_t n_tokens, char *out, size_t out_size)
+{
+	struct link *link;
+	char *link_name;
+
+	if (n_tokens != 2 && n_tokens != 3) {
+		snprintf(out, out_size, MSG_ARG_MISMATCH, tokens[0]);
+		return;
+	}
+
+	if (n_tokens == 2) {
+		link = link_next(NULL);
+
+		while (link != NULL) {
+			out_size = out_size - strlen(out);
+			out = &out[strlen(out)];
+
+			print_link_info(link, out, out_size);
+			link = link_next(link);
+		}
+	} else {
+		out_size = out_size - strlen(out);
+		out = &out[strlen(out)];
+
+		link_name = tokens[2];
+		link = link_find(link_name);
+
+		if (link == NULL) {
+			snprintf(out, out_size, MSG_ARG_INVALID,
+					"Link does not exist");
+			return;
+		}
+		print_link_info(link, out, out_size);
+	}
+}
+
 /**
  * swq <swq_name>
  *  size <size>
@@ -4380,6 +4466,11 @@ cli_process(char *in, char *out, size_t out_size)
 	}
 
 	if (strcmp(tokens[0], "link") == 0) {
+		if (strcmp(tokens[1], "show") == 0) {
+			cmd_link_show(tokens, n_tokens, out, out_size);
+			return;
+		}
+
 		cmd_link(tokens, n_tokens, out, out_size);
 		return;
 	}

examples/ip_pipeline/link.c

@@ -36,6 +36,12 @@ link_find(const char *name)
 	return NULL;
 }
 
+struct link *
+link_next(struct link *link)
+{
+	return (link == NULL) ? TAILQ_FIRST(&link_list) : TAILQ_NEXT(link, node);
+}
+
 static struct rte_eth_conf port_conf_default = {
 	.link_speeds = 0,
 	.rxmode = {

examples/ip_pipeline/link.h

@@ -30,6 +30,9 @@ link_init(void);
 struct link *
 link_find(const char *name);
 
+struct link *
+link_next(struct link *link);
+
 struct link_params_rss {
 	uint32_t queue_id[LINK_RXQ_RSS_MAX];
 	uint32_t n_queues;