@@ -728,6 +728,21 @@ static int virtnet_xdp_xmit(struct net_device *dev,
return ret;
}
+static void put_xdp_frags(struct xdp_buff *xdp)
+{
+ struct skb_shared_info *shinfo;
+ struct page *xdp_page;
+ int i;
+
+ if (xdp_buff_has_frags(xdp)) {
+ shinfo = xdp_get_shared_info_from_buff(xdp);
+ for (i = 0; i < shinfo->nr_frags; i++) {
+ xdp_page = skb_frag_page(&shinfo->frags[i]);
+ put_page(xdp_page);
+ }
+ }
+}
+
static int virtnet_xdp_handler(struct bpf_prog *xdp_prog, struct xdp_buff *xdp,
struct net_device *dev,
unsigned int *xdp_xmit,
@@ -1242,12 +1257,9 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
xdp_prog = rcu_dereference(rq->xdp_prog);
if (xdp_prog) {
unsigned int xdp_frags_truesz = 0;
- struct skb_shared_info *shinfo;
- struct page *xdp_page;
struct xdp_buff xdp;
void *data;
u32 act;
- int i;
data = mergeable_xdp_prepare(vi, rq, xdp_prog, ctx, &frame_sz, &num_buf, &page,
offset, &len, hdr);
@@ -1278,14 +1290,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
goto err_xdp_frags;
}
err_xdp_frags:
- if (xdp_buff_has_frags(&xdp)) {
- shinfo = xdp_get_shared_info_from_buff(&xdp);
- for (i = 0; i < shinfo->nr_frags; i++) {
- xdp_page = skb_frag_page(&shinfo->frags[i]);
- put_page(xdp_page);
- }
- }
-
+ put_xdp_frags(&xdp);
goto err_xdp;
}
rcu_read_unlock();
This patch introduce a new function that releases the xdp shinfo. The subsequent patch will reuse this function. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/net/virtio_net.c | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-)