6.6-stable review patch. If anyone has any objections, please let me know.
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From: Joshua Washington joshwash@google.com
commit 415cadd505464d9a11ff5e0f6e0329c127849da5 upstream.
Before this patch the NETDEV_XDP_ACT_NDO_XMIT XDP feature flag is set by default as part of driver initialization, and is never cleared. However, this flag differs from others in that it is used as an indicator for whether the driver is ready to perform the ndo_xdp_xmit operation as part of an XDP_REDIRECT. Kernel helpers xdp_features_(set|clear)_redirect_target exist to convey this meaning.
This patch ensures that the netdev is only reported as a redirect target when XDP queues exist to forward traffic.
Fixes: 39a7f4aa3e4a ("gve: Add XDP REDIRECT support for GQI-QPL format") Cc: stable@vger.kernel.org Reviewed-by: Praveen Kaligineedi pkaligineedi@google.com Reviewed-by: Jeroen de Borst jeroendb@google.com Signed-off-by: Joshua Washington joshwash@google.com Link: https://patch.msgid.link/20250214224417.1237818-1-joshwash@google.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Joshua Washington joshwash@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/google/gve/gve.h | 10 ++++++++++ drivers/net/ethernet/google/gve/gve_main.c | 6 +++++- 2 files changed, 15 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -1030,6 +1030,16 @@ static inline u32 gve_xdp_tx_start_queue return gve_xdp_tx_queue_id(priv, 0); }
+static inline bool gve_supports_xdp_xmit(struct gve_priv *priv) +{ + switch (priv->queue_format) { + case GVE_GQI_QPL_FORMAT: + return true; + default: + return false; + } +} + /* buffers */ int gve_alloc_page(struct gve_priv *priv, struct device *dev, struct page **page, dma_addr_t *dma, --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -1753,6 +1753,8 @@ static void gve_turndown(struct gve_priv /* Stop tx queues */ netif_tx_disable(priv->dev);
+ xdp_features_clear_redirect_target(priv->dev); + gve_clear_napi_enabled(priv); gve_clear_report_stats(priv);
@@ -1793,6 +1795,9 @@ static void gve_turnup(struct gve_priv * } }
+ if (priv->num_xdp_queues && gve_supports_xdp_xmit(priv)) + xdp_features_set_redirect_target(priv->dev, false); + gve_set_napi_enabled(priv); }
@@ -2014,7 +2019,6 @@ static void gve_set_netdev_xdp_features( if (priv->queue_format == GVE_GQI_QPL_FORMAT) { xdp_features = NETDEV_XDP_ACT_BASIC; xdp_features |= NETDEV_XDP_ACT_REDIRECT; - xdp_features |= NETDEV_XDP_ACT_NDO_XMIT; xdp_features |= NETDEV_XDP_ACT_XSK_ZEROCOPY; } else { xdp_features = 0;