[dpdk-dev] [PATCH] examples/kni: fix crash during MTU set
Ferruh Yigit
ferruh.yigit at intel.com
Thu May 21 17:10:42 CEST 2020
During MTU set (kni_change_mtu) sample application setup queues, which
can free and re-allocate queues.
Meanwhile sample application keeps continues in Rx/Tx burst calls in
different threads, which may cause crash during queue setup.
Pausing application Rx/Tx calls before MTU set and starts it back
afterwards.
Bugzilla ID: 482
Fixes: a26b116749a3 ("examples/kni: fix MTU change to setup Tx queue")
Cc: stable at dpdk.org
Signed-off-by: Ferruh Yigit <ferruh.yigit at intel.com>
---
Cc: Rasesh Mody <rmody at marvell.com>
Cc: Xi Zhang <xix.zhang at intel.com>
---
examples/kni/main.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/examples/kni/main.c b/examples/kni/main.c
index 7a927a50c0..80dd0353e7 100644
--- a/examples/kni/main.c
+++ b/examples/kni/main.c
@@ -768,9 +768,8 @@ monitor_all_ports_link_status(void *arg)
return NULL;
}
-/* Callback for request of changing MTU */
static int
-kni_change_mtu(uint16_t port_id, unsigned int new_mtu)
+kni_change_mtu_(uint16_t port_id, unsigned int new_mtu)
{
int ret;
uint16_t nb_rxd = NB_RXD;
@@ -851,6 +850,19 @@ kni_change_mtu(uint16_t port_id, unsigned int new_mtu)
return 0;
}
+/* Callback for request of changing MTU */
+static int
+kni_change_mtu(uint16_t port_id, unsigned int new_mtu)
+{
+ int ret;
+
+ rte_atomic32_inc(&kni_pause);
+ ret = kni_change_mtu_(port_id, new_mtu);
+ rte_atomic32_dec(&kni_pause);
+
+ return ret;
+}
+
/* Callback for request of configuring network interface up/down */
static int
kni_config_network_interface(uint16_t port_id, uint8_t if_up)
--
2.25.4
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