[dpdk-dev] [PATCH v5 2/3] examples/l2fwd: Handle SIGINT and SIGTERM in l2fwd

[Zhihong Wang]

Handle SIGINT and SIGTERM in l2fwd.

Signed-off-by: Zhihong Wang <zhihong.wang at intel.com>
Acked-by: Michael Qiu <michael.qiu at intel.com>
---
 examples/l2fwd/main.c | 43 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 39 insertions(+), 4 deletions(-)

diff --git a/examples/l2fwd/main.c b/examples/l2fwd/main.c
index 720fd5a..f35d8a1 100644
--- a/examples/l2fwd/main.c
+++ b/examples/l2fwd/main.c
@@ -44,6 +44,8 @@
 #include <ctype.h>
 #include <errno.h>
 #include <getopt.h>
+#include <signal.h>
+#include <stdbool.h>

 #include <rte_common.h>
 #include <rte_log.h>
@@ -69,6 +71,8 @@
 #include <rte_mempool.h>
 #include <rte_mbuf.h>

+static volatile bool force_quit;
+
 #define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1

 #define NB_MBUF   8192
@@ -283,7 +287,7 @@ l2fwd_main_loop(void)
                        portid);
        }

-       while (1) {
+       while (!force_quit) {

                cur_tsc = rte_rdtsc();

@@ -491,8 +495,12 @@ check_all_ports_link_status(uint8_t port_num, uint32_t 
port_mask)
        printf("\nChecking link status");
        fflush(stdout);
        for (count = 0; count <= MAX_CHECK_TIME; count++) {
+               if (force_quit)
+                       return;
                all_ports_up = 1;
                for (portid = 0; portid < port_num; portid++) {
+                       if (force_quit)
+                               return;
                        if ((port_mask & (1 << portid)) == 0)
                                continue;
                        memset(&link, 0, sizeof(link));
@@ -534,6 +542,16 @@ check_all_ports_link_status(uint8_t port_num, uint32_t 
port_mask)
        }
 }

+static void
+signal_handler(int signum)
+{
+       if (signum == SIGINT || signum == SIGTERM) {
+               printf("\n\nSignal %d received, preparing to exit...\n",
+                               signum);
+               force_quit = true;
+       }
+}
+
 int
 main(int argc, char **argv)
 {
@@ -553,6 +571,10 @@ main(int argc, char **argv)
        argc -= ret;
        argv += ret;

+       force_quit = false;
+       signal(SIGINT, signal_handler);
+       signal(SIGTERM, signal_handler);
+
        /* parse application arguments (after the EAL ones) */
        ret = l2fwd_parse_args(argc, argv);
        if (ret < 0)
@@ -696,12 +718,25 @@ main(int argc, char **argv)

        check_all_ports_link_status(nb_ports, l2fwd_enabled_port_mask);

+       ret = 0;
        /* launch per-lcore init on every lcore */
        rte_eal_mp_remote_launch(l2fwd_launch_one_lcore, NULL, CALL_MASTER);
        RTE_LCORE_FOREACH_SLAVE(lcore_id) {
-               if (rte_eal_wait_lcore(lcore_id) < 0)
-                       return -1;
+               if (rte_eal_wait_lcore(lcore_id) < 0) {
+                       ret = -1;
+                       break;
+               }
        }

-       return 0;
+       for (portid = 0; portid < nb_ports; portid++) {
+               if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
+                       continue;
+               printf("Closing port %d...", portid);
+               rte_eth_dev_stop(portid);
+               rte_eth_dev_close(portid);
+               printf(" Done\n");
+       }
+       printf("Bye...\n");
+
+       return ret;
 }
-- 
2.5.0