[PATCH] net/af_xdp: fix custom program loading with multiple queues

[Junxiao Shi]

When the PMD is configured to load a custom XDP program, it sets
XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD flag to prevent libbpf from
loading its default XDP program. However, when queue_count is set to
greater than 1, this flag is only set for the first XSK socket but not
for subsequent XSK sockets. This causes XSK socket creation failure.

This commit ensures that XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD flag is
set for all XSK socket creations when custom XDP program is being used.

Fixes: 01fa83c94d7e ("net/af_xdp: workaround custom program loading")

Signed-off-by: Junxiao Shi <git at mail1.yoursunny.com>
---
 drivers/net/af_xdp/rte_eth_af_xdp.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c b/drivers/net/af_xdp/rte_eth_af_xdp.c
index 65479138d3..9920f49870 100644
--- a/drivers/net/af_xdp/rte_eth_af_xdp.c
+++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
@@ -1307,18 +1307,19 @@ xsk_configure(struct pmd_internals *internals, struct pkt_rx_queue *rxq,
 	cfg.bind_flags |= XDP_USE_NEED_WAKEUP;
 #endif
 
-	if (strnlen(internals->prog_path, PATH_MAX) &&
-				!internals->custom_prog_configured) {
-		ret = load_custom_xdp_prog(internals->prog_path,
-					   internals->if_index,
-					   &internals->map);
-		if (ret) {
-			AF_XDP_LOG(ERR, "Failed to load custom XDP program %s\n",
-					internals->prog_path);
-			goto out_umem;
+	if (strnlen(internals->prog_path, PATH_MAX)) {
+		if (!internals->custom_prog_configured) {
+			ret = load_custom_xdp_prog(internals->prog_path,
+							internals->if_index,
+							&internals->map);
+			if (ret) {
+				AF_XDP_LOG(ERR, "Failed to load custom XDP program %s\n",
+						internals->prog_path);
+				goto out_umem;
+			}
+			internals->custom_prog_configured = 1;
 		}
-		internals->custom_prog_configured = 1;
-		cfg.libbpf_flags = XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD;
+		cfg.libbpf_flags |= XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD;
 	}
 
 	if (internals->shared_umem)
-- 
2.17.1