linux-kernel - Re: [Patch v4 2/3] Drivers: hv: add Azure Blob driver

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Message-ID: <90ed52d3-5095-9789-53f0-477ba70edc3b@kernel.org>
Date:   Tue, 20 Jul 2021 13:10:04 +0200
From:   Jiri Slaby <jirislaby@...nel.org>
To:     longli@...uxonhyperv.com, linux-fs@...r.kernel.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hyperv@...r.kernel.org
Cc:     Long Li <longli@...rosoft.com>, Jonathan Corbet <corbet@....net>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Maximilian Luz <luzmaximilian@...il.com>,
        Mike Rapoport <rppt@...nel.org>,
        Ben Widawsky <ben.widawsky@...el.com>,
        Andra Paraschiv <andraprs@...zon.com>,
        Siddharth Gupta <sidgup@...eaurora.org>,
        Hannes Reinecke <hare@...e.de>, linux-doc@...r.kernel.org
Subject: Re: [Patch v4 2/3] Drivers: hv: add Azure Blob driver

On 20. 07. 21, 5:31, longli@...uxonhyperv.com wrote:
> --- /dev/null
> +++ b/include/uapi/misc/hv_azure_blob.h
> @@ -0,0 +1,34 @@
> +/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
> +/* Copyright (c) 2021 Microsoft Corporation. */
> +
> +#ifndef _AZ_BLOB_H
> +#define _AZ_BLOB_H
> +
> +#include <linux/kernel.h>
> +#include <linux/uuid.h>

Quoting from 
https://lore.kernel.org/linux-doc/MWHPR21MB159375586D810EC5DCB66AF0D7039@MWHPR21MB1593.namprd21.prod.outlook.com/:
=====
Seems like a #include of asm/ioctl.h (or something similar)
is needed so that _IOWR is defined.  Also, a #include
is needed for __u32, __aligned_u64, guid_t, etc.
=====

Why was no include added?

> +
> +/* user-mode sync request sent through ioctl */
> +struct az_blob_request_sync_response {
> +	__u32 status;
> +	__u32 response_len;
> +};
> +
> +struct az_blob_request_sync {
> +	guid_t guid;
> +	__u32 timeout;
> +	__u32 request_len;
> +	__u32 response_len;
> +	__u32 data_len;
> +	__u32 data_valid;
> +	__aligned_u64 request_buffer;
> +	__aligned_u64 response_buffer;
> +	__aligned_u64 data_buffer;
> +	struct az_blob_request_sync_response response;
> +};
> +
> +#define AZ_BLOB_MAGIC_NUMBER	'R'
> +#define IOCTL_AZ_BLOB_DRIVER_USER_REQUEST \
> +		_IOWR(AZ_BLOB_MAGIC_NUMBER, 0xf0, \
> +			struct az_blob_request_sync)
> +
> +#endif /* define _AZ_BLOB_H */
> 

thanks,
-- 
js
suse labs