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From: Thomas Monjalon <thomas@monjalon.net>
To: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Cc: dev@dpdk.org, Ferruh Yigit <ferruh.yigit@intel.com>,
	Akhil Goyal <gakhil@marvell.com>,
	Fiona Trahe <fiona.trahe@intel.com>, Khoa To <khot@microsoft.com>,
	Ray Kinsella <mdr@ashroe.eu>,
	andrew.rybchenko@oktetlabs.ru, olivier.matz@6wind.com,
	navasile@linux.microsoft.com, pallavi.kadam@intel.com,
	ranjit.menon@intel.com, ferruh.yigit@intel.com,
	bruce.richardson@intel.com, stephen@networkplumber.org
Subject: Re: [dpdk-dev] [PATCH v4] doc: announce API changes for Windows compatibility
Date: Mon, 02 Aug 2021 14:13:13 +0200	[thread overview]
Message-ID: <9358059.UORW4hmLsd@thomas> (raw)
In-Reply-To: <20210721195557.762726-2-dmitry.kozliuk@gmail.com>

21/07/2021 21:55, Dmitry Kozlyuk:
> Windows headers define `s_addr`, `min`, and `max` as macros.
> If DPDK headers are included after Windows ones, DPDK structure
> definitions containing fields with these names get broken (example 1),
> as well as any usage of such fields (example 2). If DPDK headers
> undefined these macros, it could break consumer code (example 3).
> It is proposed to rename structure fields in DPDK, because Win32 headers
> are used more widely than DPDK, as a general-purpose platform compared
> to domain-specific kit, and are harder to fix because of that.
> Exact new names are left for further discussion.
> 
> Example 1:
> 
>     /* in DPDK public header included after windows.h */
>     struct rte_type {
>         int min;    /* ERROR: `min` is a macro */
>     };
> 
> Example 2:
> 
>     #include <rte_ether.h>
>     #include <winsock2.h>
>     struct rte_ether_hdr eh;
>     eh.s_addr.addr_bytes[0] = 0;    /* ERROR: `addr_s` is a macro */
> 
> Example 3:
> 
>     #include <winsock2.h>
>     #include <rte_ether.h>
>     struct in_addr addr;
>     addr.s_addr = 0;      /* ERROR: there is no `s_addr` field,
>                              and `s_addr` macro is undefined by DPDK. */
> 
> Commit 6c068dbd9fea ("net: work around s_addr macro on Windows")
> modified definition of `struct rte_ether_hdr` to avoid the issue.
> However, the workaround assumes `#define s_addr S_addr.S_un`
> in Windows headers, which is not a part of official API.
> It also complicates the definition of `struct rte_ether_hdr`.
> 
> Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> Acked-by: Khoa To <khot@microsoft.com>
> ---
> +* net: ``s_addr`` and ``d_addr`` fields of ``rte_ether_hdr`` structure
> +  will be renamed in DPDK 21.11 to avoid conflict with Windows Sockets headers.
> +
> +* compressdev: ``min`` and ``max`` fields of ``rte_param_log2_range`` structure
> +  will be renamed in DPDK 21.11 to avoid conflict with Windows Sockets headers.

The struct rte_param_log2_range should also be renamed to include "compress" prefix.
But as we break the struct API, it is not an issue I guess.

> +* cryptodev: ``min`` and ``max`` fields of ``rte_crypto_param_range`` structure
> +  will be renamed in DPDK 21.11 to avoid conflict with Windows Sockets headers.

Acked-by: Thomas Monjalon <thomas@monjalon.net>



  reply	other threads:[~2021-08-02 12:13 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-03 22:51 [dpdk-dev] [PATCH] doc: announce renaming of rte_ether_hdr fields Dmitry Kozlyuk
2021-03-03 23:54 ` Stephen Hemminger
2021-03-04  7:09   ` Dmitry Kozlyuk
2021-05-20 14:28     ` Ferruh Yigit
2021-03-10 23:54 ` [dpdk-dev] [PATCH v2] doc: announce API changes for Windows compatibility Dmitry Kozlyuk
2021-03-11 16:19   ` John Alexander
2021-03-11 17:01     ` Dmitry Kozlyuk
2021-03-11 17:08       ` Tyler Retzlaff
2021-03-16 10:37   ` Thomas Monjalon
2021-05-20 18:42   ` [dpdk-dev] [PATCH v3] " Dmitry Kozlyuk
2021-05-20 18:59     ` [dpdk-dev] [EXT] " Akhil Goyal
2021-05-20 19:31       ` Dmitry Kozlyuk
2021-05-20 20:17         ` Akhil Goyal
2021-06-09 15:52           ` Dmitry Kozlyuk
2021-06-23 15:14             ` Dmitry Kozlyuk
2021-06-17 14:27           ` Tyler Retzlaff
2021-07-21 19:55     ` [dpdk-dev] " Dmitry Kozlyuk
2021-07-21 19:55       ` [dpdk-dev] [PATCH v4] " Dmitry Kozlyuk
2021-08-02 12:13         ` Thomas Monjalon [this message]
2021-08-02 12:45           ` [dpdk-dev] [EXT] " Akhil Goyal
2021-08-02 13:00             ` Dmitry Kozlyuk
2021-08-02 13:48               ` Akhil Goyal
2021-08-02 14:57                 ` Tal Shnaiderman
2021-08-02 17:46                 ` Thomas Monjalon
2021-05-20 14:24 ` [dpdk-dev] [PATCH] doc: announce renaming of rte_ether_hdr fields Ferruh Yigit
2021-05-20 15:06   ` Dmitry Kozlyuk
2021-05-20 15:27     ` Ferruh Yigit
2021-05-20 15:50       ` Dmitry Kozlyuk
2021-05-20 16:04         ` Ferruh Yigit
2021-05-20 16:16           ` Dmitry Kozlyuk
2021-05-20 16:25             ` Ferruh Yigit

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