[dpdk-dev] [PATCH v2 2/3] examples/l2fwd: Handle SIGINT and SIGTERM in l2fwd
Zhihong Wang
zhihong.wang at intel.com
Fri Dec 25 03:37:11 CET 2015
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
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