From nobody Mon Feb 9 12:02:05 2026 Received: from mail-pf1-f179.google.com (mail-pf1-f179.google.com [209.85.210.179]) (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 5B0B931B83B for ; Mon, 2 Feb 2026 22:06:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770070012; cv=none; b=A9zG+/Giq21DQRKIBqGqvn22ttD5P2xpoqURzJ58SWBG19q/K9M78RyxiBQlInVWoKdS2UDpGLF7DpL+VNDJxoSi4KG9f3Xf3yOulWCLpCY4ClCsbk9VEt0T4FwkA3KOeE/wd3JhN/BI/JQiIPj2um9aG76qXLgaDtIhhSSXA5w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770070012; c=relaxed/simple; bh=fvA0PrASi0IEQdDf3f1fGp12n+7yWLtrlVdlPB6P9Bs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=DOl/N0aaN129qtbhvB2oqZd6bxoYZ68Gye7W3ye9d4fZsZ/qLPIzJ1bKaWI3VcRV2p4YKcZfwc6OXs9TWHSpML+fe48WTQTOixxisoFH7VLAjW5OuYFK6mn1LmopsFDfgm3O1ZjpXByH6ZVuRIcMb3wUY04VY1oRWoX36okjsRU= 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=209.85.210.179 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-pf1-f179.google.com with SMTP id d2e1a72fcca58-823c56765fdso1459193b3a.1 for ; Mon, 02 Feb 2026 14:06:51 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770070011; x=1770674811; 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=9lgtSUZzde++Bz8uhOIABUkDKpLi6HbwbfVMl9KEQwY=; b=mtJd4bH9quIWCvnR5m27e2hO85diXe1GkCaZ4k8m9lpKFJLGY3/LjVJXeCjbMfSCbz SsE6G+dj6wfb1PUEDQjzXrQmx2Tu3TZGLOt0Uhg0ZbwZMmKNBbp5ynyjD4t/HVaCGy1t HbF0dtQJH+KV8+YiPxaAjKp0Spekf7tlK0Y3O8pYYuJCJDXwu9Brm9DgnBSewLrXZywA AC2Z9Va/fq5RfxXm64pfduCLgOxhB8wfowQREH4LV2ZttFZhGjI13NdFuc8kwqc4xaOy Qv5WMx97GQ3PQ2bO2QWhkKRTpS+v5CGJLKGvWc7FdRetyjfwX1rfwsPA/+K+66Fm5MF3 whSQ== X-Forwarded-Encrypted: i=1; AJvYcCXRQZkZFcBdUVKOGC2TiME+8CBGqzdUi2r6XZaT01Bog6NoG3v6lR46rP8/2W6gFe7q1f734qHlq/gPeHc=@vger.kernel.org X-Gm-Message-State: AOJu0YykeXfP/Q8SgLNvABS5HxGxBH2zTxHzlPRKtpOJMxmaKg4R34PA 82KZIcnUYf+PXBMiA/en9Ysb0TLi0uxxjCvEg1KLUBn9Ti5UbsPf5iZS X-Gm-Gg: AZuq6aLBwrVeV2qewOL78eh2mGQug4iMtQ/8EtbOZrCqFzIMjUVOZ11U+yFG1bl0ptR Ltno2qhKuzj4R/IK3qcyp63y/tjTJDSZnMx9xp3PV7KSPAk/oDOrEVuJFwGMG7CI3sR+cMotF5/ y7wxjHHQ3F2QmbcoEL6/GtDf9BKmjNQR+JXLqlfCR/IXU9EsutvS2eKXWOsnQhfG/X5cvjJAwvs +JAB3vgKchcMDDbCjJV7ukTSMAjoYeaMjXRnbaP+pDQJGsmZat38i7RVHlwnyUYx/lZABjL+RSH v3XE0vAqbtS2yPMtqnRAqfzV7sA+AZmfmFZWSQKNazY4EnUTXrX+Fd9BKVWnGN6BgXPWQ45VHCR 7G48mv/eZ+J+HLE+F1yQy4LVsfSLaynWt8GuXQBV9uui8K+6gtEEJgXpZEPU1Yd5xC/Ntx9n4MN TG0FmpgAaeei2JVcRCkqUPhVvkJg== X-Received: by 2002:a05:6a00:8f0c:b0:81f:5ec1:8bd2 with SMTP id d2e1a72fcca58-823aab6f87dmr11472886b3a.54.1770070010681; Mon, 02 Feb 2026 14:06:50 -0800 (PST) Received: from localhost.localdomain ([1.227.206.162]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82379b6b277sm21019732b3a.29.2026.02.02.14.06.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Feb 2026 14:06:50 -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 v6 03/16] fs: add generic FS_IOC_SHUTDOWN definitions Date: Tue, 3 Feb 2026 07:01:49 +0900 Message-Id: <20260202220202.10907-4-linkinjeon@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260202220202.10907-1-linkinjeon@kernel.org> References: <20260202220202.10907-1-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. This patch adds 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. Signed-off-by: Namjae Jeon Reviewed-by: "Darrick J. Wong" Reviewed-by: Christoph Hellwig Reviewed-by: Jan Kara --- 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