diff mbox

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

Message ID 1451512791-5442-3-git-send-email-zhihong.wang@intel.com (mailing list archive)
State Accepted, archived
Delegated to: Thomas Monjalon
Headers show

Commit Message

Zhihong Wang Dec. 30, 2015, 9:59 p.m. UTC
Handle SIGINT and SIGTERM in l2fwd.

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

Comments

Stephen Hemminger Dec. 31, 2015, 5:01 p.m. UTC | #1
On Wed, 30 Dec 2015 16:59:50 -0500
Zhihong Wang <zhihong.wang@intel.com> wrote:

> +static void
> +signal_handler(int signum)
> +{
> +	if (signum == SIGINT || signum == SIGTERM) {
> +		printf("\n\nSignal %d received, preparing to exit...\n",
> +				signum);
> +		force_quit = true;

Actually, the if () is redundant since you only registered SIGINT, and SIGTERM those are the
only signals you could possibly receive.

Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Zhihong Wang Jan. 4, 2016, 2 a.m. UTC | #2
> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Friday, January 1, 2016 1:02 AM
> To: Wang, Zhihong <zhihong.wang@intel.com>
> Cc: dev@dpdk.org; Ananyev, Konstantin <konstantin.ananyev@intel.com>; Qiu,
> Michael <michael.qiu@intel.com>
> Subject: Re: [PATCH v5 2/3] examples/l2fwd: Handle SIGINT and SIGTERM in
> l2fwd
> 
> On Wed, 30 Dec 2015 16:59:50 -0500
> Zhihong Wang <zhihong.wang@intel.com> wrote:
> 
> > +static void
> > +signal_handler(int signum)
> > +{
> > +	if (signum == SIGINT || signum == SIGTERM) {
> > +		printf("\n\nSignal %d received, preparing to exit...\n",
> > +				signum);
> > +		force_quit = true;
> 
> Actually, the if () is redundant since you only registered SIGINT, and SIGTERM
> those are the only signals you could possibly receive.

Yes it's kind of an obsession I guess, just want to make the code crystal clear :)

> 
> Acked-by: Stephen Hemminger <stephen@networkplumber.org>
diff mbox

Patch

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;
 }