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Thu, 06 Feb 2025 22:11:08 -0800 (PST) Received: from localhost ([157.82.205.237]) by smtp.gmail.com with UTF8SMTPSA id d9443c01a7336-21f3683d729sm22605005ad.124.2025.02.06.22.11.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 06 Feb 2025 22:11:08 -0800 (PST) From: Akihiko Odaki Date: Fri, 07 Feb 2025 15:10:51 +0900 Subject: [PATCH net-next v6 1/7] tun: Refactor CONFIG_TUN_VNET_CROSS_LE Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250207-tun-v6-1-fb49cf8b103e@daynix.com> References: <20250207-tun-v6-0-fb49cf8b103e@daynix.com> In-Reply-To: <20250207-tun-v6-0-fb49cf8b103e@daynix.com> To: Jonathan Corbet , Willem de Bruijn , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Michael S. Tsirkin" , Xuan Zhuo , Shuah Khan , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-kselftest@vger.kernel.org, Yuri Benditovich , Andrew Melnychenko , Stephen Hemminger , gur.stavi@huawei.com, devel@daynix.com, Akihiko Odaki Cc: Willem de Bruijn X-Mailer: b4 0.14.2 X-Patchwork-Delegate: kuba@kernel.org Check IS_ENABLED(CONFIG_TUN_VNET_CROSS_LE) to save some lines and make future changes easier. Signed-off-by: Akihiko Odaki Reviewed-by: Willem de Bruijn --- drivers/net/tun.c | 29 ++++++++++------------------- 1 file changed, 10 insertions(+), 19 deletions(-) diff --git a/drivers/net/tun.c b/drivers/net/tun.c index e816aaba8e5f2ed06f8832f79553b6c976e75bb8..4b189cbd28e63ec6325073d9a7678f4210bff3e1 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -298,17 +298,21 @@ static bool tun_napi_frags_enabled(const struct tun_file *tfile) return tfile->napi_frags_enabled; } -#ifdef CONFIG_TUN_VNET_CROSS_LE static inline bool tun_legacy_is_little_endian(struct tun_struct *tun) { - return tun->flags & TUN_VNET_BE ? false : - virtio_legacy_is_little_endian(); + bool be = IS_ENABLED(CONFIG_TUN_VNET_CROSS_LE) && + (tun->flags & TUN_VNET_BE); + + return !be && virtio_legacy_is_little_endian(); } static long tun_get_vnet_be(struct tun_struct *tun, int __user *argp) { int be = !!(tun->flags & TUN_VNET_BE); + if (!IS_ENABLED(CONFIG_TUN_VNET_CROSS_LE)) + return -EINVAL; + if (put_user(be, argp)) return -EFAULT; @@ -319,6 +323,9 @@ static long tun_set_vnet_be(struct tun_struct *tun, int __user *argp) { int be; + if (!IS_ENABLED(CONFIG_TUN_VNET_CROSS_LE)) + return -EINVAL; + if (get_user(be, argp)) return -EFAULT; @@ -329,22 +336,6 @@ static long tun_set_vnet_be(struct tun_struct *tun, int __user *argp) return 0; } -#else -static inline bool tun_legacy_is_little_endian(struct tun_struct *tun) -{ - return virtio_legacy_is_little_endian(); -} - -static long tun_get_vnet_be(struct tun_struct *tun, int __user *argp) -{ - return -EINVAL; -} - -static long tun_set_vnet_be(struct tun_struct *tun, int __user *argp) -{ - return -EINVAL; -} -#endif /* CONFIG_TUN_VNET_CROSS_LE */ static inline bool tun_is_little_endian(struct tun_struct *tun) {