[dpdk-dev] [PATCH v2 3/3] vhost: call api to unregister vhost driver

[Ouyang Changchun]

The following commit broke 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 the second time startup.

Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com>
---
 examples/vhost/main.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

change in v2:
 - refine the signal handler name

diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index 56a5c70..1b137b9 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 INT signal, unregister vhost driver */
+static void
+sigint_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, sigint_handler);
+
 	/* init EAL */
 	ret = rte_eal_init(argc, argv);
 	if (ret < 0)
-- 
1.8.4.2