[ovs-dev] [PATCH v8 4/6] netdev-dpdk: manage failure in mempool name creation.

antonio.fischetti at intel.com antonio.fischetti at intel.com
Thu Oct 19 16:54:06 UTC 2017

In case a mempool name could not be generated log a message
and return a null mempool pointer to the caller.

CC: Mark B Kavanagh <mark.b.kavanagh at intel.com>
CC: Darrell Ball <dlu998 at gmail.com>
CC: Ciara Loftus <ciara.loftus at intel.com>
CC: Kevin Traynor <ktraynor at redhat.com>
CC: Aaron Conole <aconole at redhat.com>
Fixes: d555d9bded5f ("netdev-dpdk: Create separate memory pool for each port.")
Signed-off-by: Antonio Fischetti <antonio.fischetti at intel.com>
 lib/netdev-dpdk.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index dc1e9c3..6fc6e1b 100644
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -502,6 +502,9 @@ dpdk_mp_name(struct dpdk_mp *dmp)
     int ret = snprintf(mp_name, RTE_MEMPOOL_NAMESIZE, "ovs_%x_%d_%d_%u",
                        h, dmp->socket_id, dmp->mtu, dmp->mp_size);
     if (ret < 0 || ret >= RTE_MEMPOOL_NAMESIZE) {
+        VLOG_DBG("snprintf returned %d. Failed to generate a mempool "
+            "name for \"%s\". Hash:0x%x, mtu:%d, mbufs:%u.",
+            ret, dmp->if_name, h, dmp->mtu, dmp->mp_size);
         return NULL;
     return mp_name;
@@ -533,6 +536,10 @@ dpdk_mp_create(struct netdev_dpdk *dev, int mtu, bool *mp_exists)
     do {
         char *mp_name = dpdk_mp_name(dmp);
+        if (!mp_name) {
+            rte_free(dmp);
+            return NULL;
+        }
         VLOG_DBG("Port %s: Requesting a mempool of %u mbufs "
                   "on socket %d for %d Rx and %d Tx queues.",

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