[ovs-dev] [PATCH] netdev-afxdp: Error when no XDP program loaded.

William Tu u9012063 at gmail.com
Tue Jul 23 22:58:41 UTC 2019


netdev-afxdp requires XDP program to be loaded.  When prog_id == 0,
it indicates no XDP program, so return error and free resources.

Signed-off-by: William Tu <u9012063 at gmail.com>
---
 lib/netdev-afxdp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/netdev-afxdp.c b/lib/netdev-afxdp.c
index 6b0b93e7f432..79c7a442e9cf 100644
--- a/lib/netdev-afxdp.c
+++ b/lib/netdev-afxdp.c
@@ -283,6 +283,12 @@ xsk_configure_socket(struct xsk_umem_info *umem, uint32_t ifindex,
         free(xsk);
         return NULL;
     }
+    if (!prog_id) {
+        VLOG_ERR("No XDP program is loaded at ifindex %d", ifindex);
+        xsk_socket__delete(xsk->xsk);
+        free(xsk);
+        return NULL;
+    }
 
     while (!xsk_ring_prod__reserve(&xsk->umem->fq,
                                    PROD_NUM_DESCS, &idx)) {
-- 
2.7.4



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