Re: [Qemu-devel] [PATCH 1/2] linux-user: Fix target FS_IOC_GETFLAGS and FS_IOC_SETFLAGS numbers

[Laurent Vivier]

Le 12/10/2017 à 17:30, Peter Maydell a écrit :
> We were defining TARGET_FS_IOC_GETFLAGS and TARGET_FS_IOC_SETFLAGS
> using the host 'long' type in the size field, which meant that
> they had the wrong values if the host and guest had different
> sized longs. Switch to abi_long instead.
> 
> This fixes a bug where these ioctls don't work on 32-bit guests
> on 64-bit hosts (and makes the LTP test 'setxattr03' pass
> where it did not previously.)
> 
> Reported-by: pgndev <address@hidden>
> Signed-off-by: Peter Maydell <address@hidden>
> ---
>  linux-user/syscall_defs.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
> index 40c5027..f7cc9f9 100644
> --- a/linux-user/syscall_defs.h
> +++ b/linux-user/syscall_defs.h
> @@ -1101,8 +1101,8 @@ struct target_pollfd {
>  /* Note that the ioctl numbers claim type "long" but the actual type
>   * used by the kernel is "int".
>   */
> -#define TARGET_FS_IOC_GETFLAGS TARGET_IOR('f', 1, long)
> -#define TARGET_FS_IOC_SETFLAGS TARGET_IOW('f', 2, long)
> +#define TARGET_FS_IOC_GETFLAGS TARGET_IOR('f', 1, abi_long)
> +#define TARGET_FS_IOC_SETFLAGS TARGET_IOW('f', 2, abi_long)
>  
>  #define TARGET_FS_IOC_FIEMAP TARGET_IOWR('f',11,struct fiemap)
>  
> 

Reviewed-by: Laurent Vivier <address@hidden>