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gve: add XDP DROP and PASS support for DQ

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This patch adds support for running XDP programs on DQ, along with
rudimentary processing for XDP_DROP and XDP_PASS. These actions require
very limited driver functionality when it comes to processing an XDP
buffer, so currently if the XDP action is not XDP_PASS, the packet is
dropped and stats are updated.

Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Praveen Kaliginedi <pkaligineedi@google.com>
Signed-off-by: Joshua Washington <joshwash@google.com>
Signed-off-by: Harshitha Ramamurthy<hramamurthy@google.com>
Link: https://patch.msgid.link/20250321002910.1343422-7-hramamurthy@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Joshua Washington 2025-03-21 00:29:10 +00:00 committed by Jakub Kicinski
parent 346fb86ddd
commit 293b49361f
1 changed files with 52 additions and 0 deletions
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52
drivers/net/ethernet/google/gve/gve_rx_dqo.c
View File

@ -546,6 +546,29 @@ static int gve_rx_append_frags(struct napi_struct *napi,
return 0;
}
static void gve_xdp_done_dqo(struct gve_priv *priv, struct gve_rx_ring *rx,
struct xdp_buff *xdp, struct bpf_prog *xprog,
int xdp_act,
struct gve_rx_buf_state_dqo *buf_state)
{
u64_stats_update_begin(&rx->statss);
switch (xdp_act) {
case XDP_ABORTED:
case XDP_DROP:
default:
rx->xdp_actions[xdp_act]++;
break;
case XDP_TX:
rx->xdp_tx_errors++;
break;
case XDP_REDIRECT:
rx->xdp_redirect_errors++;
break;
}
u64_stats_update_end(&rx->statss);
gve_free_buffer(rx, buf_state);
}
/* Returns 0 if descriptor is completed successfully.
* Returns -EINVAL if descriptor is invalid.
* Returns -ENOMEM if data cannot be copied to skb.
@ -560,6 +583,7 @@ static int gve_rx_dqo(struct napi_struct *napi, struct gve_rx_ring *rx,
const bool hsplit = compl_desc->split_header;
struct gve_rx_buf_state_dqo *buf_state;
struct gve_priv *priv = rx->gve;
struct bpf_prog *xprog;
u16 buf_len;
u16 hdr_len;
@ -633,6 +657,34 @@ static int gve_rx_dqo(struct napi_struct *napi, struct gve_rx_ring *rx,
return 0;
}
xprog = READ_ONCE(priv->xdp_prog);
if (xprog) {
struct xdp_buff xdp;
void *old_data;
int xdp_act;
xdp_init_buff(&xdp, buf_state->page_info.buf_size,
&rx->xdp_rxq);
xdp_prepare_buff(&xdp,
buf_state->page_info.page_address +
buf_state->page_info.page_offset,
buf_state->page_info.pad,
buf_len, false);
old_data = xdp.data;
xdp_act = bpf_prog_run_xdp(xprog, &xdp);
buf_state->page_info.pad += xdp.data - old_data;
buf_len = xdp.data_end - xdp.data;
if (xdp_act != XDP_PASS) {
gve_xdp_done_dqo(priv, rx, &xdp, xprog, xdp_act,
buf_state);
return 0;
}
u64_stats_update_begin(&rx->statss);
rx->xdp_actions[XDP_PASS]++;
u64_stats_update_end(&rx->statss);
}
if (eop && buf_len <= priv->rx_copybreak) {
rx->ctx.skb_head = gve_rx_copy(priv->dev, napi,
&buf_state->page_info, buf_len);