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>
next prev parent 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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