From nobody Sun Feb 8 12:36:32 2026 Received: from mail-pl1-f173.google.com (mail-pl1-f173.google.com [209.85.214.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 78CB9214A64 for ; Wed, 4 Feb 2026 07:50:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.173 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770191447; cv=none; b=dHEpaDN8P/4t/4gW5Eu8qAm4pFA2m6lQSTjNadVkJTtS4ViwyE0dblaJS/jWeat1lwoqHtNivFUtfnR/g8cM6ni8XTuknwXozHcpHz5MSeMM5WAiHFn+QAJvxWn84FoSH9CSdnevCp1ulxH/Jkla6MvLhDHoojtrEeHC16XLtmY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770191447; c=relaxed/simple; bh=kbcOV/6QcQXosOVb/kYnmczZIIbazol1Xw4so2doLDM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=RFRsYu2OmvBvdoakbALQ66eBFNZ0xRv+pn/2KadVXsnL0jlixPXYk9wdNNAowsYD+pCfXONIulRm81dV6BE1hyRGTbhAbhOvFZK73M8QDYZeOwtKfm93IbZwtIgfWm/0LJ1yLqF9lJgnp5KsoPsWYKysfcjvXl3lvjNZ3GMOiyI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=kernel.org; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.214.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=kernel.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-pl1-f173.google.com with SMTP id d9443c01a7336-2a07f8dd9cdso46163835ad.1 for ; Tue, 03 Feb 2026 23:50:47 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770191447; x=1770796247; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=EgV//1wifMQx8DWc1kqJsH8XCVKk4uWaLyVeoKmarPQ=; b=bBIXDm7FVDzxoTHnhtMs4sP2/HUZcP4x/OHsIi0BdYnR6z7enWCfLisu49R+8vqDwE NCj9uz2jHTTrO7nfTBc161pXTfQNkFDnqyPblyRlqZTXVRIvCNhh98WhiYhbxb6zYJ6I rs9+63k5IrroZrwGihhpQPxRFoAERINpLb3HCbeT4elTy3cdmff+svuYVDkIG/c/J3ZC HuygOn09chVIfN5ED4XbbSteTXUhufS9C7jtHIVppO8YgKZw8jdRgYiuOyf6FS9v56KD THzdzb8HqVwakxhQ8eN0pISsJPuHkEs4W4SIY8mLbcvXptbi3yPUCj1Hnp7padw0HklT D4SA== X-Forwarded-Encrypted: i=1; AJvYcCUqvPC+g73lzze86QQbKNcGvF/BsF5WWyifM84ngiAfVgtO3fmltvlRE1C0opGu2Z4kchVMiTQPnmCxkqA=@vger.kernel.org X-Gm-Message-State: AOJu0YyOF0TJaVxYiFAg+rfUa/Z+s9yKsWRjAhs2JSDSLiNqEK9NGq17 5rp5wU6n7mHEbLe2MFAeB49zfxDdokcpGuesri0QgV9fVHjgXr9SDuCX X-Gm-Gg: AZuq6aL2zmkKrQB1FEyPFWTOiP/PGgh54HBwfLz98a3hv2LnhTq+VYLekZ38oU72yDy 0nEaV2SqAhbPxg8JJG/CDjVvdlJy4lrtP7ipObO26EKH4JCVo+/YPnA5CMw1rSj8QGEIIvSZlZl A9Vy8gu6RpAvGA5Ccx34L3aAo6NopY1wWPHARMMMNt4mgPdYvdBg6ElJ83E8HsetqX08NwNJzA5 ErARnM56H2HYt3yZlHx0paayK4r2xv2gM7jIVkEs86zOquuQh19hvRI1VnDxDUWgI2fHGXOEILp M8g2AXyG5xnqBL0Zdjo/GJmiK+AXZv21Q3rW4fpFSpWSX3Yti8L9MOnUz+Ws9svf9N9YVgf9Na+ vS7vO1fe/92fS7zhS0bx+wHNWut/g40GmqxH3j4gd9EGksluCCCr6aahPBg6gGY15umtknN6DgA 5XQhX2DUUc/d16Lpiqu9ZzeUqgig== X-Received: by 2002:a17:902:eb83:b0:2a0:fb1c:143d with SMTP id d9443c01a7336-2a933b89ed8mr21250935ad.1.1770191446827; Tue, 03 Feb 2026 23:50:46 -0800 (PST) Received: from localhost.localdomain ([1.227.206.162]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a933967771sm14554875ad.82.2026.02.03.23.50.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Feb 2026 23:50:46 -0800 (PST) From: Namjae Jeon To: viro@zeniv.linux.org.uk, brauner@kernel.org, hch@lst.de, tytso@mit.edu, willy@infradead.org, jack@suse.cz, djwong@kernel.org, josef@toxicpanda.com, sandeen@sandeen.net, rgoldwyn@suse.com, xiang@kernel.org, dsterba@suse.com, pali@kernel.org, ebiggers@kernel.org, neil@brown.name, amir73il@gmail.com Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, iamjoonsoo.kim@lge.com, cheol.lee@lge.com, jay.sim@lge.com, gunho.lee@lge.com, Namjae Jeon Subject: [PATCH v7 02/17] fs: add generic FS_IOC_SHUTDOWN definitions Date: Wed, 4 Feb 2026 16:47:40 +0900 Message-Id: <20260204074755.9058-3-linkinjeon@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260204074755.9058-1-linkinjeon@kernel.org> References: <20260204074755.9058-1-linkinjeon@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Currently, several filesystems (e.g., xfs, ext4, btrfs) implement a "shutdown" or "going down" ioctl to simulate filesystem force a shutdown. While they often use the same underlying numeric value, the definition is duplicated across filesystem headers or private definitions. Add generic definitions for FS_IOC_SHUTDOWN in uapi/linux/fs.h. This allows new filesystems (like ntfs) to implement this feature using a standard VFS definition and paves the way for existing filesystems to unify their definitions later. The flag names are standardized as FS_SHUTDOWN_* to be consistent with the ioctl name, replacing the historical GOING_DOWN naming convention. Reviewed-by: "Darrick J. Wong" Reviewed-by: Christoph Hellwig Reviewed-by: Jan Kara Signed-off-by: Namjae Jeon --- include/uapi/linux/fs.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 66ca526cf786..32e24778c9e5 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -656,4 +656,16 @@ struct procmap_query { __u64 build_id_addr; /* in */ }; =20 +/* + * Shutdown the filesystem. + */ +#define FS_IOC_SHUTDOWN _IOR('X', 125, __u32) + +/* + * Flags for FS_IOC_SHUTDOWN + */ +#define FS_SHUTDOWN_FLAGS_DEFAULT 0x0 +#define FS_SHUTDOWN_FLAGS_LOGFLUSH 0x1 /* flush log but not data*/ +#define FS_SHUTDOWN_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ + #endif /* _UAPI_LINUX_FS_H */ --=20 2.25.1