[2/3] libvhost-user: Adopt new backend naming

In order to get rid of harmful language, the Vhost-user
specification changed features and requests naming from
_SLAVE_ to _BACKEND_.

This patch adopts the new naming convention.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 subprojects/libvhost-user/libvhost-user.c | 20 ++++++++++----------
 subprojects/libvhost-user/libvhost-user.h | 20 ++++++++++----------
 2 files changed, 20 insertions(+), 20 deletions(-)

On Mon, Jan 30, 2023 at 11:45:47AM +0100, Maxime Coquelin wrote:
> In order to get rid of harmful language, the Vhost-user
> specification changed features and requests naming from
> _SLAVE_ to _BACKEND_.


let's drop "to get rid of the remaining harmful language" 
as don't get rid of it.  consistency is sufficient motivation.


> This patch adopts the new naming convention.
> 
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
>  subprojects/libvhost-user/libvhost-user.c | 20 ++++++++++----------
>  subprojects/libvhost-user/libvhost-user.h | 20 ++++++++++----------
>  2 files changed, 20 insertions(+), 20 deletions(-)
> 
> diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvhost-user/libvhost-user.c
> index fc69783d2b..f661af7c85 100644
> --- a/subprojects/libvhost-user/libvhost-user.c
> +++ b/subprojects/libvhost-user/libvhost-user.c
> @@ -140,7 +140,7 @@ vu_request_to_string(unsigned int req)
>          REQ(VHOST_USER_SET_VRING_ENABLE),
>          REQ(VHOST_USER_SEND_RARP),
>          REQ(VHOST_USER_NET_SET_MTU),
> -        REQ(VHOST_USER_SET_SLAVE_REQ_FD),
> +        REQ(VHOST_USER_SET_BACKEND_REQ_FD),
>          REQ(VHOST_USER_IOTLB_MSG),
>          REQ(VHOST_USER_SET_VRING_ENDIAN),
>          REQ(VHOST_USER_GET_CONFIG),
> @@ -1365,7 +1365,7 @@ bool vu_set_queue_host_notifier(VuDev *dev, VuVirtq *vq, int fd,
>      int qidx = vq - dev->vq;
>      int fd_num = 0;
>      VhostUserMsg vmsg = {
> -        .request = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG,
> +        .request = VHOST_USER_BACKEND_VRING_HOST_NOTIFIER_MSG,
>          .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY_MASK,
>          .size = sizeof(vmsg.payload.area),
>          .payload.area = {
> @@ -1383,7 +1383,7 @@ bool vu_set_queue_host_notifier(VuDev *dev, VuVirtq *vq, int fd,
>  
>      vmsg.fd_num = fd_num;
>  
> -    if (!vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) {
> +    if (!vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_BACKEND_SEND_FD)) {
>          return false;
>      }
>  
> @@ -1461,9 +1461,9 @@ vu_get_protocol_features_exec(VuDev *dev, VhostUserMsg *vmsg)
>       */
>      uint64_t features = 1ULL << VHOST_USER_PROTOCOL_F_MQ |
>                          1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD |
> -                        1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ |
> +                        1ULL << VHOST_USER_PROTOCOL_F_BACKEND_REQ |
>                          1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER |
> -                        1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD |
> +                        1ULL << VHOST_USER_PROTOCOL_F_BACKEND_SEND_FD |
>                          1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK |
>                          1ULL << VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS;
>  
> @@ -1494,7 +1494,7 @@ vu_set_protocol_features_exec(VuDev *dev, VhostUserMsg *vmsg)
>  
>      if (vu_has_protocol_feature(dev,
>                                  VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS) &&
> -        (!vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_SLAVE_REQ) ||
> +        (!vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_BACKEND_REQ) ||
>           !vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_REPLY_ACK))) {
>          /*
>           * The use case for using messages for kick/call is simulation, to make
> @@ -1507,7 +1507,7 @@ vu_set_protocol_features_exec(VuDev *dev, VhostUserMsg *vmsg)
>           * that actually enables the simulation case.
>           */
>          vu_panic(dev,
> -                 "F_IN_BAND_NOTIFICATIONS requires F_SLAVE_REQ && F_REPLY_ACK");
> +                 "F_IN_BAND_NOTIFICATIONS requires F_BACKEND_REQ && F_REPLY_ACK");
>          return false;
>      }
>  
> @@ -1910,7 +1910,7 @@ vu_process_message(VuDev *dev, VhostUserMsg *vmsg)
>          return vu_get_queue_num_exec(dev, vmsg);
>      case VHOST_USER_SET_VRING_ENABLE:
>          return vu_set_vring_enable_exec(dev, vmsg);
> -    case VHOST_USER_SET_SLAVE_REQ_FD:
> +    case VHOST_USER_SET_BACKEND_REQ_FD:
>          return vu_set_slave_req_fd(dev, vmsg);
>      case VHOST_USER_GET_CONFIG:
>          return vu_get_config(dev, vmsg);
> @@ -2416,9 +2416,9 @@ static void _vu_queue_notify(VuDev *dev, VuVirtq *vq, bool sync)
>      if (vq->call_fd < 0 &&
>          vu_has_protocol_feature(dev,
>                                  VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS) &&
> -        vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_SLAVE_REQ)) {
> +        vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_BACKEND_REQ)) {
>          VhostUserMsg vmsg = {
> -            .request = VHOST_USER_SLAVE_VRING_CALL,
> +            .request = VHOST_USER_BACKEND_VRING_CALL,
>              .flags = VHOST_USER_VERSION,
>              .size = sizeof(vmsg.payload.state),
>              .payload.state = {
> diff --git a/subprojects/libvhost-user/libvhost-user.h b/subprojects/libvhost-user/libvhost-user.h
> index 8cda9b8f57..8c5a2719e3 100644
> --- a/subprojects/libvhost-user/libvhost-user.h
> +++ b/subprojects/libvhost-user/libvhost-user.h
> @@ -54,12 +54,12 @@ enum VhostUserProtocolFeature {
>      VHOST_USER_PROTOCOL_F_RARP = 2,
>      VHOST_USER_PROTOCOL_F_REPLY_ACK = 3,
>      VHOST_USER_PROTOCOL_F_NET_MTU = 4,
> -    VHOST_USER_PROTOCOL_F_SLAVE_REQ = 5,
> +    VHOST_USER_PROTOCOL_F_BACKEND_REQ = 5,
>      VHOST_USER_PROTOCOL_F_CROSS_ENDIAN = 6,
>      VHOST_USER_PROTOCOL_F_CRYPTO_SESSION = 7,
>      VHOST_USER_PROTOCOL_F_PAGEFAULT = 8,
>      VHOST_USER_PROTOCOL_F_CONFIG = 9,
> -    VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD = 10,
> +    VHOST_USER_PROTOCOL_F_BACKEND_SEND_FD = 10,
>      VHOST_USER_PROTOCOL_F_HOST_NOTIFIER = 11,
>      VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD = 12,
>      VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS = 14,
> @@ -92,7 +92,7 @@ typedef enum VhostUserRequest {
>      VHOST_USER_SET_VRING_ENABLE = 18,
>      VHOST_USER_SEND_RARP = 19,
>      VHOST_USER_NET_SET_MTU = 20,
> -    VHOST_USER_SET_SLAVE_REQ_FD = 21,
> +    VHOST_USER_SET_BACKEND_REQ_FD = 21,
>      VHOST_USER_IOTLB_MSG = 22,
>      VHOST_USER_SET_VRING_ENDIAN = 23,
>      VHOST_USER_GET_CONFIG = 24,
> @@ -113,13 +113,13 @@ typedef enum VhostUserRequest {
>  } VhostUserRequest;
>  
>  typedef enum VhostUserSlaveRequest {
> -    VHOST_USER_SLAVE_NONE = 0,
> -    VHOST_USER_SLAVE_IOTLB_MSG = 1,
> -    VHOST_USER_SLAVE_CONFIG_CHANGE_MSG = 2,
> -    VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG = 3,
> -    VHOST_USER_SLAVE_VRING_CALL = 4,
> -    VHOST_USER_SLAVE_VRING_ERR = 5,
> -    VHOST_USER_SLAVE_MAX
> +    VHOST_USER_BACKEND_NONE = 0,
> +    VHOST_USER_BACKEND_IOTLB_MSG = 1,
> +    VHOST_USER_BACKEND_CONFIG_CHANGE_MSG = 2,
> +    VHOST_USER_BACKEND_VRING_HOST_NOTIFIER_MSG = 3,
> +    VHOST_USER_BACKEND_VRING_CALL = 4,
> +    VHOST_USER_BACKEND_VRING_ERR = 5,
> +    VHOST_USER_BACKEND_MAX
>  }  VhostUserSlaveRequest;
>  
>  typedef struct VhostUserMemoryRegion {
> -- 
> 2.39.1