[PATCH v3 2/6] kni: add link status test

[Dan Gora <dg@adax.com>]

Test changing the link, speed, duplex, etc. status of the KNI interface
with rte_kni_update_link().

Signed-off-by: Dan Gora <dg@adax.com>
---
 test/test/test_kni.c | 131 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)

diff --git a/test/test/test_kni.c b/test/test/test_kni.c
index 3dcadcebd..138bc9686 100644
--- a/test/test/test_kni.c
+++ b/test/test/test_kni.c
@@ -118,6 +118,133 @@ kni_change_mtu(uint16_t port_id, unsigned int new_mtu)
 					 port_id, kni_pkt_mtu);
 	return 0;
 }
+
+static int
+test_kni_link_change(void)
+{
+	struct rte_eth_link link;
+	int ret;
+	int pid;
+
+	pid = fork();
+	if (pid < 0) {
+		printf("Error: Failed to fork a process\n");
+		return -1;
+	}
+
+	if (pid == 0) {
+		printf("Starting KNI Link status change tests.\n");
+		if (system(IFCONFIG TEST_KNI_PORT" up") == -1) {
+			ret = -1;
+			goto error;
+		}
+
+		link.link_speed = 10;
+		link.link_status = ETH_LINK_UP;
+		link.link_autoneg = ETH_LINK_AUTONEG;
+		link.link_duplex = ETH_LINK_FULL_DUPLEX;
+		ret = rte_kni_update_link(test_kni_ctx, &link);
+		if (ret != 0) {
+			printf("Failed to change link state to "
+				"Up/10Mbps/AutoNeg/Full ret=%d.\n", ret);
+			goto error;
+		}
+		rte_delay_ms(1000);
+
+		link.link_speed = 0;
+		link.link_status = ETH_LINK_DOWN;
+		link.link_autoneg = ETH_LINK_FIXED;
+		link.link_duplex = ETH_LINK_FULL_DUPLEX;
+		ret = rte_kni_update_link(test_kni_ctx, &link);
+		if (ret != 0) {
+			printf("Failed to change link state to Down ret=%d.\n",
+				ret);
+			goto error;
+		}
+		rte_delay_ms(1000);
+
+		link.link_speed = 1000;
+		link.link_status = ETH_LINK_UP;
+		link.link_autoneg = ETH_LINK_AUTONEG;
+		link.link_duplex = ETH_LINK_HALF_DUPLEX;
+		ret = rte_kni_update_link(test_kni_ctx, &link);
+		if (ret != 0) {
+			printf("Failed to change link state to "
+				"Up/1Gbps/AutoNeg/Half ret=%d.\n", ret);
+			goto error;
+		}
+		rte_delay_ms(1000);
+
+		link.link_speed = 0;
+		link.link_status = ETH_LINK_DOWN;
+		link.link_autoneg = ETH_LINK_FIXED;
+		link.link_duplex = ETH_LINK_FULL_DUPLEX;
+		ret = rte_kni_update_link(test_kni_ctx, &link);
+		if (ret != 0) {
+			printf("Failed to change link state to Down ret=%d.\n",
+				ret);
+			goto error;
+		}
+		rte_delay_ms(1000);
+
+		link.link_speed = 40000;
+		link.link_status = ETH_LINK_UP;
+		link.link_autoneg = ETH_LINK_FIXED;
+		link.link_duplex = ETH_LINK_FULL_DUPLEX;
+		ret = rte_kni_update_link(test_kni_ctx, &link);
+		if (ret != 0) {
+			printf("Failed to change link state to "
+				"Up/40Gbps/Fixed/Full ret=%d.\n", ret);
+			goto error;
+		}
+		rte_delay_ms(1000);
+
+		link.link_speed = 0;
+		link.link_status = ETH_LINK_DOWN;
+		link.link_autoneg = ETH_LINK_FIXED;
+		link.link_duplex = ETH_LINK_FULL_DUPLEX;
+		ret = rte_kni_update_link(test_kni_ctx, &link);
+		if (ret != 0) {
+			printf("Failed to change link state to Down ret=%d.\n",
+				ret);
+			goto error;
+		}
+		rte_delay_ms(1000);
+
+		link.link_speed = 100000;
+		link.link_status = ETH_LINK_UP;
+		link.link_autoneg = ETH_LINK_FIXED;
+		link.link_duplex = ETH_LINK_FULL_DUPLEX;
+		ret = rte_kni_update_link(test_kni_ctx, &link);
+		if (ret != 0) {
+			printf("Failed to change link state to "
+				"Up/100Gbps/Fixed/Full ret=%d.\n", ret);
+			goto error;
+		}
+		rte_delay_ms(1000);
+
+error:
+		if (system(IFCONFIG TEST_KNI_PORT" down") == -1)
+			ret = -1;
+
+		printf("KNI Link status change tests: %s.\n",
+			(ret == 0) ? "Passed" : "Failed");
+		exit(ret);
+	} else {
+		int p_ret, status;
+
+		while (1) {
+			p_ret = waitpid(pid, &status, WNOHANG);
+			if (p_ret != 0) {
+				if (WIFEXITED(status))
+					return WEXITSTATUS(status);
+				return -1;
+			}
+			rte_delay_ms(10);
+			rte_kni_handle_request(test_kni_ctx);
+		}
+	}
+}
 /**
  * This loop fully tests the basic functions of KNI. e.g. transmitting,
  * receiving to, from kernel space, and kernel requests.
@@ -401,6 +528,10 @@ test_kni_processing(uint16_t port_id, struct rte_mempool *mp)
 		goto fail_kni;
 	}
 
+	ret = test_kni_link_change();
+	if (ret != 0)
+		goto fail_kni;
+
 	rte_eal_mp_remote_launch(test_kni_loop, NULL, CALL_MASTER);
 	RTE_LCORE_FOREACH_SLAVE(i) {
 		if (rte_eal_wait_lcore(i) < 0) {
-- 
2.19.0