[dpdk-dev] [PATCH 3/3] vhost: call api to unregister vhost driver

Xie, Huawei huawei.xie at intel.com
Thu Jul 2 18:04:00 CEST 2015


On 7/2/2015 11:33 AM, Ouyang, Changchun wrote:
> The commit will break vhost sample when it runs in second time:
> 292959c71961acde0cda6e77e737bb0a4df1559c
>
> It should call api to unregister vhost driver when sample exit/quit, then
> the socket file will be removed(by calling unlink), and thus make vhost sample
> work correctly in second time startup.
>
> Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com>
> ---
>  examples/vhost/main.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
>
> diff --git a/examples/vhost/main.c b/examples/vhost/main.c
> index 72c4773..90666b3 100644
> --- a/examples/vhost/main.c
> +++ b/examples/vhost/main.c
> @@ -2871,6 +2871,16 @@ setup_mempool_tbl(int socket, uint32_t index, char *pool_name,
>  	}
>  }
>  
> +/* When we receive a HUP signal, unregister vhost driver */
> +static void
> +sighup_handler(__rte_unused int signum)
> +{
> +	/* Unregister vhost driver. */
> +	int ret = rte_vhost_driver_unregister((char *)&dev_basename);
> +	if (ret != 0)
> +		rte_exit(EXIT_FAILURE, "vhost driver unregister failure.\n");
> +	exit(0);
> +}
>  
>  /*
>   * Main function, does initialisation and calls the per-lcore functions. The CUSE
> @@ -2887,6 +2897,8 @@ main(int argc, char *argv[])
>  	uint16_t queue_id;
>  	static pthread_t tid;
>  
> +	signal(SIGINT, sighup_handler);
> +

ignor if duplciated.
sighup->sigint

>  	/* init EAL */
>  	ret = rte_eal_init(argc, argv);
>  	if (ret < 0)
> @@ -3060,6 +3072,12 @@ main(int argc, char *argv[])
>  
>  	/* Start CUSE session. */
>  	rte_vhost_driver_session_start();
> +
> +	/* Unregister vhost driver. */
> +	ret = rte_vhost_driver_unregister((char *)&dev_basename);
> +	if (ret != 0)
> +		rte_exit(EXIT_FAILURE,"vhost driver unregister failure.\n");
> +
>  	return 0;
>  
>  }



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