Re: [Qemu-devel] [PATCH 2/2] linux-user: Add SOCKOP_sendmmsg and SOCKOP_recvmmsg socket call, wire them up.

[Laurent Vivier <laurent@vivier.eu>]

Le 24/12/2015 19:59, John Paul Adrian Glaubitz a écrit :
> Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
> ---
>  linux-user/syscall.c      | 8 ++++++--
>  linux-user/syscall_defs.h | 2 ++
>  2 files changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index 6c64ba6..dd6ed47 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -2171,7 +2171,6 @@ static abi_long do_sendrecvmsg(int fd, abi_ulong target_msg,
>      return ret;
>  }
>  
> -#ifdef TARGET_NR_sendmmsg
>  /* We don't rely on the C library to have sendmmsg/recvmmsg support,
>   * so it might not have this *mmsg-specific flag either.
>   */
> @@ -2218,7 +2217,6 @@ static abi_long do_sendrecvmmsg(int fd, abi_ulong target_msgvec,
>      }
>      return ret;
>  }
> -#endif
>  
>  /* If we don't have a system accept4() then just call accept.
>   * The callsites to do_accept4() will ensure that they don't
> @@ -2441,6 +2439,8 @@ static abi_long do_socketcall(int num, abi_ulong vptr)
>          [SOCKOP_shutdown] = 2,    /* sockfd, how */
>          [SOCKOP_sendmsg] = 3,     /* sockfd, msg, flags */
>          [SOCKOP_recvmsg] = 3,     /* sockfd, msg, flags */
> +        [SOCKOP_sendmmsg] = 4,    /* sockfd, msgvec, vlen, flags */
> +        [SOCKOP_recvmmsg] = 4,    /* sockfd, msgvec, vlen, flags */
>          [SOCKOP_setsockopt] = 5,  /* sockfd, level, optname, optval, optlen */
>          [SOCKOP_getsockopt] = 5,  /* sockfd, level, optname, optval, optlen */
>      };
> @@ -2491,6 +2491,10 @@ static abi_long do_socketcall(int num, abi_ulong vptr)
>          return do_sendrecvmsg(a[0], a[1], a[2], 1);
>      case SOCKOP_recvmsg: /* sockfd, msg, flags */
>          return do_sendrecvmsg(a[0], a[1], a[2], 0);
> +    case SOCKOP_sendmmsg: /* sockfd, msgvec, vlen, flags */
> +        return do_sendrecvmmsg(a[0], a[1], a[2], a[3], 1);
> +    case SOCKOP_recvmmsg: /* sockfd, msgvec, vlen, flags */
> +        return do_sendrecvmmsg(a[0], a[1], a[2], a[3], 0);
>      case SOCKOP_setsockopt: /* sockfd, level, optname, optval, optlen */
>          return do_setsockopt(a[0], a[1], a[2], a[3], a[4]);
>      case SOCKOP_getsockopt: /* sockfd, level, optname, optval, optlen */
> diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
> index f996acf..0d6d141 100644
> --- a/linux-user/syscall_defs.h
> +++ b/linux-user/syscall_defs.h
> @@ -28,6 +28,8 @@
>  #define SOCKOP_sendmsg          16
>  #define SOCKOP_recvmsg          17
>  #define SOCKOP_accept4          18
> +#define SOCKOP_recvmmsg         19
> +#define SOCKOP_sendmmsg         20
>  
>  #define IPCOP_semop		1
>  #define IPCOP_semget		2
> 
Reviewed-by: Laurent Vivier <laurent@vivier.eu>