[dpdk-dev] [PATCH v2 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>
---
 examples/l2fwd/main.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/examples/l2fwd/main.c b/examples/l2fwd/main.c
index 720fd5a..75899dd 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 <unistd.h>

 #include <rte_common.h>
 #include <rte_log.h>
@@ -69,6 +71,9 @@
 #include <rte_mempool.h>
 #include <rte_mbuf.h>

+static int force_quit = -1;
+static int signo_quit = -1;
+
 #define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1

 #define NB_MBUF   8192
@@ -284,6 +289,8 @@ l2fwd_main_loop(void)
        }

        while (1) {
+               if (unlikely(force_quit != 0))
+                       break;

                cur_tsc = rte_rdtsc();

@@ -534,6 +541,45 @@ check_all_ports_link_status(uint8_t port_num, uint32_t 
port_mask)
        }
 }

+static void
+stop_ports(void)
+{
+       unsigned portid, nb_ports;
+
+       nb_ports = rte_eth_dev_count();
+       for (portid = 0; portid < nb_ports; portid++) {
+               if ((l2fwd_enabled_port_mask & (1 << portid)) == 0) {
+                       continue;
+               }
+               printf("Stopping port %d...", portid);
+               rte_eth_dev_stop(portid);
+               rte_eth_dev_close(portid);
+               printf(" Done\n");
+       }
+}
+
+static void
+signal_handler(__rte_unused int signum)
+{
+       if (signum == SIGINT || signum == SIGTERM) {
+               printf("\nSignal %d received, preparing to exit...\n",
+                               signum);
+               if (force_quit < 0) {
+                       printf("Forwarding not started yet...\n");
+                       /* stop ports */
+                       stop_ports();
+                       printf("Bye...\n");
+                       /* inform if there's a caller */
+                       signal(signum, SIG_DFL);
+                       kill(getpid(), signum);
+               } else {
+                       printf("Forwarding started already...\n");
+                       signo_quit = signum;
+                       force_quit = 1;
+               }
+       }
+}
+
 int
 main(int argc, char **argv)
 {
@@ -546,6 +592,9 @@ main(int argc, char **argv)
        unsigned lcore_id, rx_lcore_id;
        unsigned nb_ports_in_mask = 0;

+       signal(SIGINT, signal_handler);
+       signal(SIGTERM, signal_handler);
+
        /* init EAL */
        ret = rte_eal_init(argc, argv);
        if (ret < 0)
@@ -697,11 +746,22 @@ main(int argc, char **argv)
        check_all_ports_link_status(nb_ports, l2fwd_enabled_port_mask);

        /* launch per-lcore init on every lcore */
+       force_quit = 0;
        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;
        }

+       printf("Stopping forwarding... Done\n");
+       /* stop ports */
+       stop_ports();
+       printf("Bye...\n");
+       /* inform if there's a caller */
+       if (force_quit != 0) {
+               signal(signo_quit, SIG_DFL);
+               kill(getpid(), signo_quit);
+       }
+
        return 0;
 }
-- 
2.5.0