[dpdk-dev] [PATCH 1/5] app/testpmd: check not detaching device twice

[Thomas Monjalon <thomas@monjalon.net>]

The command "port detach" is removing the EAL rte_device
of the ethdev port specified as parameter.
The function name and some comments are updated to make clear
that we are detaching the whole device.

After detaching, the pointer, which maps a port to its device,
is reset. This way, it is possible to check whether a port
is still associated to a (not removed) device.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
 app/test-pmd/cmdline.c |  2 +-
 app/test-pmd/testpmd.c | 35 ++++++++++++++++++++++++++++-------
 app/test-pmd/testpmd.h |  2 +-
 3 files changed, 30 insertions(+), 9 deletions(-)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 3b469ac64..f041a01aa 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -1305,7 +1305,7 @@ static void cmd_operate_detach_port_parsed(void *parsed_result,
 	struct cmd_operate_detach_port_result *res = parsed_result;
 
 	if (!strcmp(res->keyword, "detach"))
-		detach_port(res->port_id);
+		detach_port_device(res->port_id);
 	else
 		printf("Unknown parameter\n");
 }
diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 14647fa19..56e408cdf 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -2351,10 +2351,19 @@ setup_attached_port(portid_t pi)
 }
 
 void
-detach_port(portid_t port_id)
+detach_port_device(portid_t port_id)
 {
+	struct rte_device *dev;
+	portid_t sibling;
+
 	printf("Removing a device...\n");
 
+	dev = rte_eth_devices[port_id].device;
+	if (dev == NULL) {
+		printf("Device already removed\n");
+		return;
+	}
+
 	if (ports[port_id].port_status != RTE_PORT_CLOSED) {
 		if (ports[port_id].port_status != RTE_PORT_STOPPED) {
 			printf("Port not stopped\n");
@@ -2365,15 +2374,27 @@ detach_port(portid_t port_id)
 			port_flow_flush(port_id);
 	}
 
-	if (rte_dev_remove(rte_eth_devices[port_id].device) != 0) {
-		TESTPMD_LOG(ERR, "Failed to detach port %u\n", port_id);
+	if (rte_dev_remove(dev) != 0) {
+		TESTPMD_LOG(ERR, "Failed to detach device %s\n", dev->name);
 		return;
 	}
 
+	for (sibling = 0; sibling < RTE_MAX_ETHPORTS; sibling++) {
+		if (rte_eth_devices[sibling].device != dev)
+			continue;
+		/* reset mapping between old ports and removed device */
+		rte_eth_devices[sibling].device = NULL;
+		if (ports[sibling].port_status != RTE_PORT_CLOSED) {
+			/* sibling ports are forced to be closed */
+			ports[sibling].port_status = RTE_PORT_CLOSED;
+			printf("Port %u is closed\n", sibling);
+		}
+	}
+
 	remove_unused_fwd_ports();
 
-	printf("Port %u is detached. Now total ports is %d\n",
-			port_id, nb_ports);
+	printf("Device of port %u is detached\n", port_id);
+	printf("Now total ports is %d\n", nb_ports);
 	printf("Done\n");
 	return;
 }
@@ -2406,7 +2427,7 @@ pmd_test_exit(void)
 			 */
 			device = rte_eth_devices[pt_id].device;
 			if (device && !strcmp(device->driver->name, "net_virtio_user"))
-				detach_port(pt_id);
+				detach_port_device(pt_id);
 		}
 	}
 
@@ -2518,7 +2539,7 @@ rmv_event_callback(void *arg)
 	stop_port(port_id);
 	no_link_check = org_no_link_check;
 	close_port(port_id);
-	detach_port(port_id);
+	detach_port_device(port_id);
 	if (need_to_start)
 		start_packet_forwarding(0);
 }
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index 3da728cad..646e44940 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -712,7 +712,7 @@ void stop_port(portid_t pid);
 void close_port(portid_t pid);
 void reset_port(portid_t pid);
 void attach_port(char *identifier);
-void detach_port(portid_t port_id);
+void detach_port_device(portid_t port_id);
 int all_ports_stopped(void);
 int port_is_stopped(portid_t port_id);
 int port_is_started(portid_t port_id);
-- 
2.19.0