Hi Maxime,
> -----Original Message-----
> From: Maxime Coquelin <maxime.coque...@redhat.com>
> Sent: Monday, December 21, 2020 5:14 AM
> To: dev@dpdk.org; Xia, Chenbo <chenbo....@intel.com>; olivier.m...@6wind.com;
> amore...@redhat.com; david.march...@redhat.com
> Cc: Maxime Coquelin <maxime.coque...@redhat.com>
> Subject: [PATCH 39/40] net/virtio: move Vhost-kernel data to its backend
>
> As done earlier for Vhost-user, this patch moves the
> Vhost-Kernel specific data to its backend file.
>
> Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
> ---
> drivers/net/virtio/virtio_user/vhost_kernel.c | 78 +++++++++++++++----
> .../net/virtio/virtio_user/virtio_user_dev.c | 43 ++--------
> .../net/virtio/virtio_user/virtio_user_dev.h | 7 +-
> 3 files changed, 72 insertions(+), 56 deletions(-)
<snip>
> vhost_kernel_setup(struct virtio_user_dev *dev)
> {
> int vhostfd;
> - uint32_t i;
> + uint32_t q, i;
> + struct vhost_kernel_data *data;
> +
> + data = malloc(sizeof(*data));
> + if (!data) {
> + PMD_INIT_LOG(ERR, "(%s) Failed to allocate Vhost-kernel data",
> dev->path);
> + return -1;
> + }
> +
> + data->vhostfds = malloc(dev->max_queue_pairs * sizeof(int));
> + data->tapfds = malloc(dev->max_queue_pairs * sizeof(int));
> + if (!data->vhostfds || !data->tapfds) {
> + PMD_INIT_LOG(ERR, "(%s) Failed to allocate FDs", dev->path);
> + return -1;
> + }
> +
> + for (q = 0; q < dev->max_queue_pairs; ++q) {
> + data->vhostfds[q] = -1;
> + data->tapfds[q] = -1;
> + }
Forget to do 'dev->backend_data = data'? 😊
Besides,
When I do test 'virtio_user for exceptional path', iperf just cannot normally
send/recv pkts. Testpmd have some pkts (<10), guess tcp connection cannot be
established. I have not tried to locate the root cause. Just thinking it's
better to tell you first.
Thanks!
Chenbo
>
> get_vhost_kernel_max_regions();
>
> for (i = 0; i < dev->max_queue_pairs; ++i) {
> vhostfd = open(dev->path, O_RDWR);
> if (vhostfd < 0) {
> - PMD_DRV_LOG(ERR, "fail to open %s, %s",
> - dev->path, strerror(errno));
> + PMD_DRV_LOG(ERR, "fail to open %s, %s", dev->path,
> strerror(errno));
> return -1;
> }
>
> - dev->vhostfds[i] = vhostfd;
> + data->vhostfds[i] = vhostfd;
> }
>
> return 0;
> @@ -360,6 +392,19 @@ vhost_kernel_setup(struct virtio_user_dev *dev)
> static int
> vhost_kernel_destroy(struct virtio_user_dev *dev)
> {
> + struct vhost_kernel_data *data = dev->backend_data;
> + uint32_t i;
> +
> + for (i = 0; i < dev->max_queue_pairs; ++i) {
> + close(data->vhostfds[i]);
> + if (data->tapfds[i] >= 0)
> + close(data->tapfds[i]);
> + }
> +
> + free(data->vhostfds);
> + free(data->tapfds);
> + free(data);
> +
> return 0;
> }
>
> @@ -395,14 +440,15 @@ vhost_kernel_enable_queue_pair(struct virtio_user_dev
> *dev,
> int vhostfd;
> int tapfd;
> int req_mq = (dev->max_queue_pairs > 1);
> + struct vhost_kernel_data *data = dev->backend_data;
>
> - vhostfd = dev->vhostfds[pair_idx];
> + vhostfd = data->vhostfds[pair_idx];
>
> if (dev->qp_enabled[pair_idx] == enable)
> return 0;
>
> if (!enable) {
> - tapfd = dev->tapfds[pair_idx];
> + tapfd = data->tapfds[pair_idx];
> if (vhost_kernel_set_backend(vhostfd, -1) < 0) {
> PMD_DRV_LOG(ERR, "fail to set backend for vhost
> kernel");
> return -1;
> @@ -415,8 +461,8 @@ vhost_kernel_enable_queue_pair(struct virtio_user_dev
> *dev,
> return 0;
> }
>
> - if (dev->tapfds[pair_idx] >= 0) {
> - tapfd = dev->tapfds[pair_idx];
> + if (data->tapfds[pair_idx] >= 0) {
> + tapfd = data->tapfds[pair_idx];
> if (vhost_kernel_tap_set_offload(tapfd, dev->features) == -1)
> return -1;
> if (req_mq && vhost_kernel_tap_set_queue(tapfd, true) < 0) {
> @@ -439,7 +485,7 @@ vhost_kernel_enable_queue_pair(struct virtio_user_dev
> *dev,
> return -1;
> }
>
> - dev->tapfds[pair_idx] = tapfd;
> + data->tapfds[pair_idx] = tapfd;
>
> set_backend:
> if (vhost_kernel_set_backend(vhostfd, tapfd) < 0) {
> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> index 93a9ce2cd2..154aecc209 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> @@ -397,11 +397,6 @@ virtio_user_mem_event_cb(enum rte_mem_event type
> __rte_unused,
> static int
> virtio_user_dev_setup(struct virtio_user_dev *dev)
> {
> - uint32_t q;
> -
> - dev->vhostfds = NULL;
> - dev->tapfds = NULL;
> -
> if (dev->is_server) {
> if (dev->backend_type != VIRTIO_USER_BACKEND_VHOST_USER) {
> PMD_DRV_LOG(ERR, "Server mode only supports
> vhost-user!");
> @@ -409,34 +404,21 @@ virtio_user_dev_setup(struct virtio_user_dev *dev)
> }
> }
>
> - if (dev->backend_type == VIRTIO_USER_BACKEND_VHOST_USER) {
> + switch (dev->backend_type) {
> + case VIRTIO_USER_BACKEND_VHOST_USER:
> dev->ops = &virtio_ops_user;
> - } else if (dev->backend_type ==
> - VIRTIO_USER_BACKEND_VHOST_KERNEL) {
> + break;
> + case VIRTIO_USER_BACKEND_VHOST_KERNEL:
> dev->ops = &virtio_ops_kernel;
> -
> - dev->vhostfds = malloc(dev->max_queue_pairs *
> - sizeof(int));
> - dev->tapfds = malloc(dev->max_queue_pairs *
> - sizeof(int));
> - if (!dev->vhostfds || !dev->tapfds) {
> - PMD_INIT_LOG(ERR, "(%s) Failed to allocate FDs",
> dev->path);
> - return -1;
> - }
> -
> - for (q = 0; q < dev->max_queue_pairs; ++q) {
> - dev->vhostfds[q] = -1;
> - dev->tapfds[q] = -1;
> - }
> - } else if (dev->backend_type ==
> - VIRTIO_USER_BACKEND_VHOST_VDPA) {
> + break;
> + case VIRTIO_USER_BACKEND_VHOST_VDPA:
> dev->ops = &virtio_ops_vdpa;
> - } else {
> + break;
> + default:
> PMD_DRV_LOG(ERR, "(%s) Unknown backend type", dev->path);
> return -1;
> }
>
> -
> if (dev->ops->setup(dev) < 0) {
> PMD_INIT_LOG(ERR, "(%s) Failed to setup backend\n", dev->path);
> return -1;
> @@ -592,15 +574,6 @@ virtio_user_dev_uninit(struct virtio_user_dev *dev)
> close(dev->callfds[i]);
> close(dev->kickfds[i]);
> }
> - if (dev->vhostfds) {
> - for (i = 0; i < dev->max_queue_pairs; ++i) {
> - close(dev->vhostfds[i]);
> - if (dev->tapfds[i] >= 0)
> - close(dev->tapfds[i]);
> - }
> - free(dev->vhostfds);
> - free(dev->tapfds);
> - }
>
> free(dev->ifname);
>
> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.h
> b/drivers/net/virtio/virtio_user/virtio_user_dev.h
> index a429dcc57c..5a2c9d38dd 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.h
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.h
> @@ -31,11 +31,6 @@ struct virtio_user_dev {
> /* for vhost_vdpa backend */
> int vhostfd;
>
> - /* for vhost_kernel backend */
> - char *ifname;
> - int *vhostfds;
> - int *tapfds;
> -
> /* for both vhost_user and vhost_kernel */
> int callfds[VIRTIO_MAX_VIRTQUEUES];
> int kickfds[VIRTIO_MAX_VIRTQUEUES];
> @@ -55,6 +50,8 @@ struct virtio_user_dev {
> uint16_t port_id;
> uint8_t mac_addr[RTE_ETHER_ADDR_LEN];
> char path[PATH_MAX];
> + char *ifname;
> +
> union {
> struct vring vrings[VIRTIO_MAX_VIRTQUEUES];
> struct vring_packed packed_vrings[VIRTIO_MAX_VIRTQUEUES];
> --
> 2.29.2
