[dpdk-dev] [PATCH v3 4/8] vhost: log vring desc buffer changes

[Yuanhan Liu]

Every time we copy a buf to vring desc, we need to log it.

Signed-off-by: Yuanhan Liu <yuanhan.liu at linux.intel.com>
Signed-off-by: Victor Kaplansky <victork at redhat.com>
Tested-by: Pavel Fedin <p.fedin at samsung.com>
---
 lib/librte_vhost/vhost_rxtx.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
index 9f7b1f8..9c6cc00 100644
--- a/lib/librte_vhost/vhost_rxtx.c
+++ b/lib/librte_vhost/vhost_rxtx.c
@@ -97,7 +97,7 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
        struct rte_mbuf **pkts, uint32_t count)
 {
        struct vhost_virtqueue *vq;
-       struct vring_desc *desc;
+       struct vring_desc *desc, *hdr_desc;
        struct rte_mbuf *buff;
        /* The virtio_hdr is initialised to 0. */
        struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {{0, 0, 0, 0, 0, 0}, 0};
@@ -179,6 +179,7 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,

                /* Copy virtio_hdr to packet and increment buffer address */
                buff_hdr_addr = buff_addr;
+               hdr_desc = desc;

                /*
                 * If the descriptors are chained the header and data are
@@ -203,6 +204,7 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
                        rte_memcpy((void *)(uintptr_t)(buff_addr + vb_offset),
                                rte_pktmbuf_mtod_offset(buff, const void *, 
offset),
                                len_to_cpy);
+                       vhost_log_write(dev, desc->addr + vb_offset, 
len_to_cpy);
                        PRINT_PACKET(dev, (uintptr_t)(buff_addr + vb_offset),
                                len_to_cpy, 0);

@@ -258,6 +260,7 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,

                rte_memcpy((void *)(uintptr_t)buff_hdr_addr,
                        (const void *)&virtio_hdr, vq->vhost_hlen);
+               vhost_log_write(dev, hdr_desc->addr, vq->vhost_hlen);

                PRINT_PACKET(dev, (uintptr_t)buff_hdr_addr, vq->vhost_hlen, 1);

@@ -335,6 +338,7 @@ copy_from_mbuf_to_vring(struct virtio_net *dev, uint32_t 
queue_id,

        rte_memcpy((void *)(uintptr_t)vb_hdr_addr,
                (const void *)&virtio_hdr, vq->vhost_hlen);
+       vhost_log_write(dev, vq->buf_vec[vec_idx].buf_addr, vq->vhost_hlen);

        PRINT_PACKET(dev, (uintptr_t)vb_hdr_addr, vq->vhost_hlen, 1);

@@ -379,6 +383,8 @@ copy_from_mbuf_to_vring(struct virtio_net *dev, uint32_t 
queue_id,
                rte_memcpy((void *)(uintptr_t)(vb_addr + vb_offset),
                        rte_pktmbuf_mtod_offset(pkt, const void *, seg_offset),
                        cpy_len);
+               vhost_log_write(dev, vq->buf_vec[vec_idx].buf_addr + vb_offset,
+                       cpy_len);

                PRINT_PACKET(dev,
                        (uintptr_t)(vb_addr + vb_offset),
-- 
1.9.0