From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
To: netdev@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Xuan Zhuo <xuanzhuo@linux.alibaba.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Jesper Dangaard Brouer <hawk@kernel.org>,
John Fastabend <john.fastabend@gmail.com>,
virtualization@lists.linux-foundation.org, bpf@vger.kernel.org
Subject: [PATCH net-next v3 20/27] virtio_net: separate receive_mergeable
Date: Fri, 29 Dec 2023 15:31:01 +0800 [thread overview]
Message-ID: <20231229073108.57778-21-xuanzhuo@linux.alibaba.com> (raw)
In-Reply-To: <20231229073108.57778-1-xuanzhuo@linux.alibaba.com>
This commit separates the function receive_mergeable(),
put the logic of appending frag to the skb as an independent function.
The subsequent commit will reuse it.
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
---
drivers/net/virtio/main.c | 77 ++++++++++++++++++++++++---------------
1 file changed, 47 insertions(+), 30 deletions(-)
diff --git a/drivers/net/virtio/main.c b/drivers/net/virtio/main.c
index ab1970158d85..212af542bfbe 100644
--- a/drivers/net/virtio/main.c
+++ b/drivers/net/virtio/main.c
@@ -1401,6 +1401,49 @@ static struct sk_buff *receive_mergeable_xdp(struct net_device *dev,
return NULL;
}
+struct sk_buff *virtnet_skb_append_frag(struct sk_buff *head_skb,
+ struct sk_buff *curr_skb,
+ struct page *page, void *buf,
+ int len, int truesize)
+{
+ int num_skb_frags;
+ int offset;
+
+ num_skb_frags = skb_shinfo(curr_skb)->nr_frags;
+ if (unlikely(num_skb_frags == MAX_SKB_FRAGS)) {
+ struct sk_buff *nskb = alloc_skb(0, GFP_ATOMIC);
+
+ if (unlikely(!nskb))
+ return NULL;
+
+ if (curr_skb == head_skb)
+ skb_shinfo(curr_skb)->frag_list = nskb;
+ else
+ curr_skb->next = nskb;
+ curr_skb = nskb;
+ head_skb->truesize += nskb->truesize;
+ num_skb_frags = 0;
+ }
+
+ if (curr_skb != head_skb) {
+ head_skb->data_len += len;
+ head_skb->len += len;
+ head_skb->truesize += truesize;
+ }
+
+ offset = buf - page_address(page);
+ if (skb_can_coalesce(curr_skb, num_skb_frags, page, offset)) {
+ put_page(page);
+ skb_coalesce_rx_frag(curr_skb, num_skb_frags - 1,
+ len, truesize);
+ } else {
+ skb_add_rx_frag(curr_skb, num_skb_frags, page,
+ offset, len, truesize);
+ }
+
+ return curr_skb;
+}
+
static struct sk_buff *receive_mergeable(struct net_device *dev,
struct virtnet_info *vi,
struct virtnet_rq *rq,
@@ -1450,8 +1493,6 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
if (unlikely(!curr_skb))
goto err_skb;
while (--num_buf) {
- int num_skb_frags;
-
buf = virtnet_rq_get_buf(rq, &len, &ctx);
if (unlikely(!buf)) {
pr_debug("%s: rx error: %d buffers out of %d missing\n",
@@ -1476,34 +1517,10 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
goto err_skb;
}
- num_skb_frags = skb_shinfo(curr_skb)->nr_frags;
- if (unlikely(num_skb_frags == MAX_SKB_FRAGS)) {
- struct sk_buff *nskb = alloc_skb(0, GFP_ATOMIC);
-
- if (unlikely(!nskb))
- goto err_skb;
- if (curr_skb == head_skb)
- skb_shinfo(curr_skb)->frag_list = nskb;
- else
- curr_skb->next = nskb;
- curr_skb = nskb;
- head_skb->truesize += nskb->truesize;
- num_skb_frags = 0;
- }
- if (curr_skb != head_skb) {
- head_skb->data_len += len;
- head_skb->len += len;
- head_skb->truesize += truesize;
- }
- offset = buf - page_address(page);
- if (skb_can_coalesce(curr_skb, num_skb_frags, page, offset)) {
- put_page(page);
- skb_coalesce_rx_frag(curr_skb, num_skb_frags - 1,
- len, truesize);
- } else {
- skb_add_rx_frag(curr_skb, num_skb_frags, page,
- offset, len, truesize);
- }
+ curr_skb = virtnet_skb_append_frag(head_skb, curr_skb, page,
+ buf, len, truesize);
+ if (!curr_skb)
+ goto err_skb;
}
ewma_pkt_len_add(&rq->mrg_avg_pkt_len, head_skb->len);
--
2.32.0.3.g01195cf9f
next prev parent reply other threads:[~2023-12-29 7:31 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-29 7:30 [PATCH net-next v3 00/27] virtio-net: support AF_XDP zero copy Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 01/27] virtio_net: rename free_old_xmit_skbs to free_old_xmit Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 02/27] virtio_net: unify the code for recycling the xmit ptr Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 03/27] virtio_net: independent directory Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 04/27] virtio_net: move core structures to virtio_net.h Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 05/27] virtio_net: add prefix virtnet to all struct inside virtio_net.h Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 06/27] virtio_ring: introduce virtqueue_get_buf_ctx_dma() Xuan Zhuo
2024-01-11 8:34 ` Jason Wang
2024-01-16 7:32 ` Xuan Zhuo
2024-01-22 4:18 ` Jason Wang
2024-01-22 6:04 ` Xuan Zhuo
2024-01-22 6:54 ` Jason Wang
2023-12-29 7:30 ` [PATCH net-next v3 07/27] virtio_ring: virtqueue_disable_and_recycle let the callback detach bufs Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 08/27] virtio_ring: introduce virtqueue_detach_unused_buf_dma() Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 09/27] virtio_ring: introduce virtqueue_get_dma_premapped() Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 10/27] virtio_net: sq support premapped mode Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 11/27] virtio_net: separate virtnet_rx_resize() Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 12/27] virtio_net: separate virtnet_tx_resize() Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 13/27] virtio_net: xsk: bind/unbind xsk Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 14/27] virtio_net: xsk: prevent disable tx napi Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 15/27] virtio_net: move some api to header Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 16/27] virtio_net: xsk: tx: support xmit xsk buffer Xuan Zhuo
2023-12-30 0:28 ` kernel test robot
2023-12-29 7:30 ` [PATCH net-next v3 17/27] virtio_net: xsk: tx: support wakeup Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 18/27] virtio_net: xsk: tx: handle the transmitted xsk buffer Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 19/27] virtio_net: xsk: tx: free the unused " Xuan Zhuo
2023-12-29 7:31 ` Xuan Zhuo [this message]
2023-12-29 7:31 ` [PATCH net-next v3 21/27] virtio_net: separate receive_buf Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 22/27] virtio_net: xsk: rx: support fill with xsk buffer Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 23/27] virtio_net: xsk: rx: support recv merge mode Xuan Zhuo
2023-12-29 21:03 ` kernel test robot
2023-12-30 1:01 ` kernel test robot
2023-12-29 7:31 ` [PATCH net-next v3 24/27] virtio_net: xsk: rx: support recv small mode Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 25/27] virtio_net: xsk: rx: free the unused xsk buffer Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 26/27] virtio_net: update tx timeout record Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 27/27] virtio_net: xdp_features add NETDEV_XDP_ACT_XSK_ZEROCOPY Xuan Zhuo
2024-01-11 3:27 ` [PATCH net-next v3 00/27] virtio-net: support AF_XDP zero copy Jason Wang
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