[dpdk-stable] [PATCH] net/virtio: fix broken Tx checksum offloads
Andrew Rybchenko
arybchenko at solarflare.com
Thu Oct 24 19:46:09 CEST 2019
Missing parenthesis around expression before type cast to struct
virtio_net_hdr pointer makes the arithmetic to be in
sizeof(struct virtio_net_hdr) units.
Use rte_pktmbuf_mtod_offset() to fix the problem.
Type of head_size is changed to signed since some compilers bark
on unary minus applied to unsigned.
Fixes: 1ae55ad38e5e ("net/virtio: fix mbuf data and packet length mismatch")
Cc: stable at dpdk.org
Signed-off-by: Andrew Rybchenko <arybchenko at solarflare.com>
---
drivers/net/virtio/virtio_rxtx.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index b5fc4ecbe1..274b778d84 100644
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c
@@ -635,7 +635,7 @@ virtqueue_enqueue_xmit_inorder(struct virtnet_tx *txvq,
struct vring_desc *start_dp;
struct virtio_net_hdr *hdr;
uint16_t idx;
- uint16_t head_size = vq->hw->vtnet_hdr_size;
+ int16_t head_size = vq->hw->vtnet_hdr_size;
uint16_t i = 0;
idx = vq->vq_desc_head_idx;
@@ -648,8 +648,8 @@ virtqueue_enqueue_xmit_inorder(struct virtnet_tx *txvq,
dxp->ndescs = 1;
virtio_update_packet_stats(&txvq->stats, cookies[i]);
- hdr = (struct virtio_net_hdr *)(char *)cookies[i]->buf_addr +
- cookies[i]->data_off - head_size;
+ hdr = rte_pktmbuf_mtod_offset(cookies[i],
+ struct virtio_net_hdr *, -head_size);
/* if offload disabled, hdr is not zeroed yet, do it now */
if (!vq->hw->has_tx_offload)
@@ -682,7 +682,7 @@ virtqueue_enqueue_xmit_packed_fast(struct virtnet_tx *txvq,
struct vring_packed_desc *dp;
struct vq_desc_extra *dxp;
uint16_t idx, id, flags;
- uint16_t head_size = vq->hw->vtnet_hdr_size;
+ int16_t head_size = vq->hw->vtnet_hdr_size;
struct virtio_net_hdr *hdr;
id = in_order ? vq->vq_avail_idx : vq->vq_desc_head_idx;
@@ -696,8 +696,8 @@ virtqueue_enqueue_xmit_packed_fast(struct virtnet_tx *txvq,
flags = vq->vq_packed.cached_flags;
/* prepend cannot fail, checked by caller */
- hdr = (struct virtio_net_hdr *)(char *)cookie->buf_addr +
- cookie->data_off - head_size;
+ hdr = rte_pktmbuf_mtod_offset(cookie, struct virtio_net_hdr *,
+ -head_size);
/* if offload disabled, hdr is not zeroed yet, do it now */
if (!vq->hw->has_tx_offload)
@@ -734,7 +734,7 @@ virtqueue_enqueue_xmit_packed(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
struct virtqueue *vq = txvq->vq;
struct vring_packed_desc *start_dp, *head_dp;
uint16_t idx, id, head_idx, head_flags;
- uint16_t head_size = vq->hw->vtnet_hdr_size;
+ int16_t head_size = vq->hw->vtnet_hdr_size;
struct virtio_net_hdr *hdr;
uint16_t prev;
bool prepend_header = false;
@@ -756,8 +756,8 @@ virtqueue_enqueue_xmit_packed(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
if (can_push) {
/* prepend cannot fail, checked by caller */
- hdr = (struct virtio_net_hdr *)(char *)cookie->buf_addr +
- cookie->data_off - head_size;
+ hdr = rte_pktmbuf_mtod_offset(cookie, struct virtio_net_hdr *,
+ -head_size);
prepend_header = true;
/* if offload disabled, it is not zeroed below, do it now */
@@ -832,7 +832,7 @@ virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
struct vring_desc *start_dp;
uint16_t seg_num = cookie->nb_segs;
uint16_t head_idx, idx;
- uint16_t head_size = vq->hw->vtnet_hdr_size;
+ int16_t head_size = vq->hw->vtnet_hdr_size;
bool prepend_header = false;
struct virtio_net_hdr *hdr;
@@ -849,8 +849,8 @@ virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
if (can_push) {
/* prepend cannot fail, checked by caller */
- hdr = (struct virtio_net_hdr *)(char *)cookie->buf_addr +
- cookie->data_off - head_size;
+ hdr = rte_pktmbuf_mtod_offset(cookie, struct virtio_net_hdr *,
+ -head_size);
prepend_header = true;
/* if offload disabled, it is not zeroed below, do it now */
--
2.17.1
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