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path: root/drivers/net/veth.c
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Diffstat (limited to 'drivers/net/veth.c')
-rw-r--r--drivers/net/veth.c76
1 files changed, 3 insertions, 73 deletions
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index 5146aa6989..bcdfbf61eb 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -729,80 +729,10 @@ static int veth_convert_skb_to_xdp_buff(struct veth_rq *rq,
if (skb_shared(skb) || skb_head_is_locked(skb) ||
skb_shinfo(skb)->nr_frags ||
skb_headroom(skb) < XDP_PACKET_HEADROOM) {
- u32 size, len, max_head_size, off, truesize, page_offset;
- struct sk_buff *nskb;
- struct page *page;
- int i, head_off;
- void *va;
-
- /* We need a private copy of the skb and data buffers since
- * the ebpf program can modify it. We segment the original skb
- * into order-0 pages without linearize it.
- *
- * Make sure we have enough space for linear and paged area
- */
- max_head_size = SKB_WITH_OVERHEAD(PAGE_SIZE -
- VETH_XDP_HEADROOM);
- if (skb->len > PAGE_SIZE * MAX_SKB_FRAGS + max_head_size)
- goto drop;
-
- size = min_t(u32, skb->len, max_head_size);
- truesize = SKB_HEAD_ALIGN(size) + VETH_XDP_HEADROOM;
-
- /* Allocate skb head */
- va = page_pool_dev_alloc_va(rq->page_pool, &truesize);
- if (!va)
- goto drop;
-
- nskb = napi_build_skb(va, truesize);
- if (!nskb) {
- page_pool_free_va(rq->page_pool, va, true);
+ if (skb_pp_cow_data(rq->page_pool, pskb, XDP_PACKET_HEADROOM))
goto drop;
- }
-
- skb_reserve(nskb, VETH_XDP_HEADROOM);
- skb_copy_header(nskb, skb);
- skb_mark_for_recycle(nskb);
-
- if (skb_copy_bits(skb, 0, nskb->data, size)) {
- consume_skb(nskb);
- goto drop;
- }
- skb_put(nskb, size);
- head_off = skb_headroom(nskb) - skb_headroom(skb);
- skb_headers_offset_update(nskb, head_off);
-
- /* Allocate paged area of new skb */
- off = size;
- len = skb->len - off;
-
- for (i = 0; i < MAX_SKB_FRAGS && off < skb->len; i++) {
- size = min_t(u32, len, PAGE_SIZE);
- truesize = size;
-
- page = page_pool_dev_alloc(rq->page_pool, &page_offset,
- &truesize);
- if (!page) {
- consume_skb(nskb);
- goto drop;
- }
-
- skb_add_rx_frag(nskb, i, page, page_offset, size,
- truesize);
- if (skb_copy_bits(skb, off,
- page_address(page) + page_offset,
- size)) {
- consume_skb(nskb);
- goto drop;
- }
-
- len -= size;
- off += size;
- }
-
- consume_skb(skb);
- skb = nskb;
+ skb = *pskb;
}
/* SKB "head" area always have tailroom for skb_shared_info */
@@ -1515,7 +1445,7 @@ static int veth_get_iflink(const struct net_device *dev)
rcu_read_lock();
peer = rcu_dereference(priv->peer);
- iflink = peer ? peer->ifindex : 0;
+ iflink = peer ? READ_ONCE(peer->ifindex) : 0;
rcu_read_unlock();
return iflink;