From 2049c5113fe878fc36131430c2be4e71d006cd59 Mon Sep 17 00:00:00 2001 From: Jeff Guo Date: Mon, 15 Oct 2018 19:27:27 +0800 Subject: [PATCH] app/testpmd: use hotplug failure handler MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This patch use testpmd for example, to show how an app smoothly handle failure when device be hot-unplug. Except that app should enabled the device event monitor and register the hotplug event’s callback, it also need enable hotplug handle mechanism before running. Once app detect the removal event, the hot-unplug callback would be called. It will first stop the packet forwarding, then stop the port, close the port, and finally detach the port to clean the device and release the resources. Signed-off-by: Jeff Guo Acked-by: Konstantin Ananyev Acked-by: Bernard Iremonger --- app/test-pmd/testpmd.c | 88 ++++++++++++++++++++---------------------- 1 file changed, 42 insertions(+), 46 deletions(-) diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c index d550bdac84..e8b3fa5ac9 100644 --- a/app/test-pmd/testpmd.c +++ b/app/test-pmd/testpmd.c @@ -490,9 +490,6 @@ static int eth_event_callback(portid_t port_id, static void eth_dev_event_callback(char *device_name, enum rte_dev_event_type type, void *param); -static int eth_dev_event_callback_register(void); -static int eth_dev_event_callback_unregister(void); - /* * Check if all the ports are started. @@ -2280,39 +2277,6 @@ reset_port(portid_t pid) printf("Done\n"); } -static int -eth_dev_event_callback_register(void) -{ - int ret; - - /* register the device event callback */ - ret = rte_dev_event_callback_register(NULL, - eth_dev_event_callback, NULL); - if (ret) { - printf("Failed to register device event callback\n"); - return -1; - } - - return 0; -} - - -static int -eth_dev_event_callback_unregister(void) -{ - int ret; - - /* unregister the device event callback */ - ret = rte_dev_event_callback_unregister(NULL, - eth_dev_event_callback, NULL); - if (ret < 0) { - printf("Failed to unregister device event callback\n"); - return -1; - } - - return 0; -} - void attach_port(char *identifier) { @@ -2419,14 +2383,26 @@ pmd_test_exit(void) if (hot_plug) { ret = rte_dev_event_monitor_stop(); - if (ret) + if (ret) { RTE_LOG(ERR, EAL, "fail to stop device event monitor."); + return; + } - ret = eth_dev_event_callback_unregister(); - if (ret) + ret = rte_dev_event_callback_unregister(NULL, + eth_dev_event_callback, NULL); + if (ret < 0) { RTE_LOG(ERR, EAL, - "fail to unregister all event callbacks."); + "fail to unregister device event callback.\n"); + return; + } + + ret = rte_dev_hotplug_handle_disable(); + if (ret) { + RTE_LOG(ERR, EAL, + "fail to disable hotplug handling.\n"); + return; + } } printf("\nBye...\n"); @@ -2570,6 +2546,9 @@ static void eth_dev_event_callback(char *device_name, enum rte_dev_event_type type, __rte_unused void *arg) { + uint16_t port_id; + int ret; + if (type >= RTE_DEV_EVENT_MAX) { fprintf(stderr, "%s called upon invalid event %d\n", __func__, type); @@ -2580,9 +2559,13 @@ eth_dev_event_callback(char *device_name, enum rte_dev_event_type type, case RTE_DEV_EVENT_REMOVE: RTE_LOG(ERR, EAL, "The device: %s has been removed!\n", device_name); - /* TODO: After finish failure handle, begin to stop - * packet forward, stop port, close port, detach port. - */ + ret = rte_eth_dev_get_port_by_name(device_name, &port_id); + if (ret) { + RTE_LOG(ERR, EAL, "can not get port by device %s!\n", + device_name); + return; + } + rmv_event_callback((void *)(intptr_t)port_id); break; case RTE_DEV_EVENT_ADD: RTE_LOG(ERR, EAL, "The device: %s has been added!\n", @@ -3105,14 +3088,27 @@ main(int argc, char** argv) init_config(); if (hot_plug) { - /* enable hot plug monitoring */ + ret = rte_dev_hotplug_handle_enable(); + if (ret) { + RTE_LOG(ERR, EAL, + "fail to enable hotplug handling."); + return -1; + } + ret = rte_dev_event_monitor_start(); if (ret) { - rte_errno = EINVAL; + RTE_LOG(ERR, EAL, + "fail to start device event monitoring."); return -1; } - eth_dev_event_callback_register(); + ret = rte_dev_event_callback_register(NULL, + eth_dev_event_callback, NULL); + if (ret) { + RTE_LOG(ERR, EAL, + "fail to register device event callback\n"); + return -1; + } } if (start_port(RTE_PORT_ALL) != 0) -- 2.20.1