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Re: [Xen-devel] [PATCH v4 3/4] Introduce the Xen 9pfs transport header



>>> On 24.03.17 at 19:31, <sstabellini@xxxxxxxxxx> wrote:
> --- /dev/null
> +++ b/xen/include/public/io/9pfs.h
> @@ -0,0 +1,57 @@
> +/*
> + * 9pfs.h -- Xen 9PFS transport
> + *
> + * Refer to docs/misc/9pfs.markdown for the specification
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a 
> copy
> + * of this software and associated documentation files (the "Software"), to
> + * deal in the Software without restriction, including without limitation the
> + * rights to use, copy, modify, merge, publish, distribute, sublicense, 
> and/or
> + * sell copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
> THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Copyright (C) 2017 Stefano Stabellini <stefano@xxxxxxxxxxx>
> + */
> +
> +#ifndef __XEN_PUBLIC_IO_9PFS_H__
> +#define __XEN_PUBLIC_IO_9PFS_H__
> +
> +#include "ring.h"
> +
> +/*
> + * See docs/misc/9pfs.markdown in xen.git for the full specification:
> + * https://xenbits.xen.org/docs/unstable/misc/9pfs.html 
> + */
> +#pragma pack(push)
> +#pragma pack(1)
> +struct xen_9pfs_header {
> +     uint32_t size;
> +     uint8_t id;
> +     uint16_t tag;
> +};
> +#pragma pack(pop)

There's no precedent to using pragmas in the public headers, and
these aren't C99-compliant.

Jan


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