Re: [Qemu-devel] [PATCH 1/3] Revert "vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE"

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, Oct 16, 2015 at 03:18:59PM +0800, Yuanhan Liu wrote:
> This reverts commit d1f8b30ec8dde0318fd1b98d24a64926feae9625.
> 
> It turned out that it breaks stuff, so revert it:
> 
>     http://lists.nongnu.org/archive/html/qemu-devel/2015-10/msg00949.html
> 
> CC: "Michael S. Tsirkin" <mst@redhat.com>
> Reported-by: Paolo Bonzini <pbonzini@redhat.com>
> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>

OK but that's not enough. We need to also
- drop patch sending this on stop
- send VHOST_USER_SET_VRING_ENABLE on stop and start instead

> ---
>  docs/specs/vhost-user.txt   | 4 ++--
>  hw/net/vhost_net.c          | 2 +-
>  hw/virtio/vhost-user.c      | 8 ++++----
>  linux-headers/linux/vhost.h | 2 +-
>  tests/vhost-user-test.c     | 2 +-
>  5 files changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
> index 4eadad1..4bcd17d 100644
> --- a/docs/specs/vhost-user.txt
> +++ b/docs/specs/vhost-user.txt
> @@ -211,10 +211,10 @@ Message types
>        as an owner of the session. This can be used on the Slave as a
>        "session start" flag.
>  
> - * VHOST_USER_RESET_DEVICE
> + * VHOST_USER_RESET_OWNER
>  
>        Id: 4
> -      Equivalent ioctl: VHOST_RESET_DEVICE
> +      Equivalent ioctl: VHOST_RESET_OWNER
>        Master payload: N/A
>  
>        Issued when a new connection is about to be closed. The Master will no
> diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
> index 2bce891..804f5c9 100644
> --- a/hw/net/vhost_net.c
> +++ b/hw/net/vhost_net.c
> @@ -296,7 +296,7 @@ static void vhost_net_stop_one(struct vhost_net *net,
>      } else if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER) {
>          for (file.index = 0; file.index < net->dev.nvqs; ++file.index) {
>              const VhostOps *vhost_ops = net->dev.vhost_ops;
> -            int r = vhost_ops->vhost_call(&net->dev, VHOST_RESET_DEVICE,
> +            int r = vhost_ops->vhost_call(&net->dev, VHOST_RESET_OWNER,
>                                            NULL);
>              assert(r >= 0);
>          }
> diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
> index b11c0d2..12a9104 100644
> --- a/hw/virtio/vhost-user.c
> +++ b/hw/virtio/vhost-user.c
> @@ -34,7 +34,7 @@ typedef enum VhostUserRequest {
>      VHOST_USER_GET_FEATURES = 1,
>      VHOST_USER_SET_FEATURES = 2,
>      VHOST_USER_SET_OWNER = 3,
> -    VHOST_USER_RESET_DEVICE = 4,
> +    VHOST_USER_RESET_OWNER = 4,
>      VHOST_USER_SET_MEM_TABLE = 5,
>      VHOST_USER_SET_LOG_BASE = 6,
>      VHOST_USER_SET_LOG_FD = 7,
> @@ -102,7 +102,7 @@ static unsigned long int ioctl_to_vhost_user_request[VHOST_USER_MAX] = {
>      VHOST_GET_FEATURES,     /* VHOST_USER_GET_FEATURES */
>      VHOST_SET_FEATURES,     /* VHOST_USER_SET_FEATURES */
>      VHOST_SET_OWNER,        /* VHOST_USER_SET_OWNER */
> -    VHOST_RESET_DEVICE,      /* VHOST_USER_RESET_DEVICE */
> +    VHOST_RESET_OWNER,      /* VHOST_USER_RESET_OWNER */
>      VHOST_SET_MEM_TABLE,    /* VHOST_USER_SET_MEM_TABLE */
>      VHOST_SET_LOG_BASE,     /* VHOST_USER_SET_LOG_BASE */
>      VHOST_SET_LOG_FD,       /* VHOST_USER_SET_LOG_FD */
> @@ -192,7 +192,7 @@ static bool vhost_user_one_time_request(VhostUserRequest request)
>  {
>      switch (request) {
>      case VHOST_USER_SET_OWNER:
> -    case VHOST_USER_RESET_DEVICE:
> +    case VHOST_USER_RESET_OWNER:
>      case VHOST_USER_SET_MEM_TABLE:
>      case VHOST_USER_GET_QUEUE_NUM:
>          return true;
> @@ -249,7 +249,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
>          break;
>  
>      case VHOST_USER_SET_OWNER:
> -    case VHOST_USER_RESET_DEVICE:
> +    case VHOST_USER_RESET_OWNER:
>          break;
>  
>      case VHOST_USER_SET_MEM_TABLE:
> diff --git a/linux-headers/linux/vhost.h b/linux-headers/linux/vhost.h
> index 14a0160..ead86db 100644
> --- a/linux-headers/linux/vhost.h
> +++ b/linux-headers/linux/vhost.h
> @@ -78,7 +78,7 @@ struct vhost_memory {
>  #define VHOST_SET_OWNER _IO(VHOST_VIRTIO, 0x01)
>  /* Give up ownership, and reset the device to default values.
>   * Allows subsequent call to VHOST_OWNER_SET to succeed. */
> -#define VHOST_RESET_DEVICE _IO(VHOST_VIRTIO, 0x02)
> +#define VHOST_RESET_OWNER _IO(VHOST_VIRTIO, 0x02)
>  
>  /* Set up/modify memory layout */
>  #define VHOST_SET_MEM_TABLE	_IOW(VHOST_VIRTIO, 0x03, struct vhost_memory)
> diff --git a/tests/vhost-user-test.c b/tests/vhost-user-test.c
> index 56df5cc..f181391 100644
> --- a/tests/vhost-user-test.c
> +++ b/tests/vhost-user-test.c
> @@ -53,7 +53,7 @@ typedef enum VhostUserRequest {
>      VHOST_USER_GET_FEATURES = 1,
>      VHOST_USER_SET_FEATURES = 2,
>      VHOST_USER_SET_OWNER = 3,
> -    VHOST_USER_RESET_DEVICE = 4,
> +    VHOST_USER_RESET_OWNER = 4,
>      VHOST_USER_SET_MEM_TABLE = 5,
>      VHOST_USER_SET_LOG_BASE = 6,
>      VHOST_USER_SET_LOG_FD = 7,
> -- 
> 1.9.0