From nobody Tue Dec 2 02:19:39 2025 Received: from mail-qv1-f43.google.com (mail-qv1-f43.google.com [209.85.219.43]) (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 C2AF13702E2 for ; Wed, 19 Nov 2025 14:32:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.43 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763562739; cv=none; b=jQu8vE4cnWwLGYPcrX8VxKnAkBbmSzdev6/HWRj9QKEUpD4zPva29/YG1S7I5LDU6o8IZ0Us72BFPsh3A3nrx5d4pQGFnViZ71ww8JXtcMrv2kUoOd5EhYfMQYJmJLgDQl3K+8tVUrFC2PNR8ZFlPxaAk5NeIKbnM1dnVP79cnE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763562739; c=relaxed/simple; bh=rKto9SRu25FK3OZzqAfW5fo67ECEjbM1vEpx/2n+f18=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=hzg89GnXTHCZTzX/xzGCOqUF4WwQekH6UVkvtaJZlzoB8uVHfa6bUyHiGBFZhdjwWxCUh7Pa7G/DmjvBi/8UXOV9egiBzw+ywHGcO+i8HFNsyBA43pkFpJMCHxJLC2IDzyIbXb8hv8NxhzSEWbofU2Uy9HT2kbh4uzBXFgF5+yA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=LDZ5Zp28; arc=none smtp.client-ip=209.85.219.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="LDZ5Zp28" Received: by mail-qv1-f43.google.com with SMTP id 6a1803df08f44-8804650ca32so61788756d6.0 for ; Wed, 19 Nov 2025 06:32:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1763562736; x=1764167536; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=8q+znNodto0M98KR2R7NvRlXozxhYBImnhJeUCTUfOM=; b=LDZ5Zp28D9pg6OITdqZINoD6vpc3cnXfo8FCVqi/NJex6lFMD0Pe8cMgLWwOlGDLJt BC1fJptCcwbzvsz3I8VjRcdDDi6KZlR4Dag3nc79yCbDbViqIX9RJ32gmUhd8AdyFaUY /tbBwqIPkCi68Fjua+z4UrHIZvyRYTXBCAnrjiULgaXH3wZqmev2tiOFeORZzQUIGffg AZvPbXGUnBIAapi4BNDXPt12wzN82NLhZu6+0IBf5iQy0/CBtjzqo0g/4r4dgR8MAWfH 3xDxmuvdxju9zNq3hu3w/8lQRUSWOQHYqhQB8/pPwpOaOc1ef+zYHreqvmSzN4kWEFB5 EDZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763562736; x=1764167536; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=8q+znNodto0M98KR2R7NvRlXozxhYBImnhJeUCTUfOM=; b=B/81bLhD/TDhMWRLcBy2ncn8ql4t7HlF2afA3GNYryfsV8LL7e2EqHLCDb1y9CYf8v WspCXSbDjXO0+ecBVkkOks0etwSkDVsKf8UqCONPrwu1SuN2oYczrgepWZpobMHgv3bL kVp30R3gLdBIvQ4m3WRCAiitTRe+MFqaJ/mcrUtgI9FEHJkf5OB4H5kGU4Rt0beeEn65 wjQxeEgjW1Uur70bbZnTuL9vKBnJl5REM5eIzlB/f6Dzih5Xcw62sTclEOcgJnzLohmC 6UtCwboPOsfNP46sYkXuPy3ftnZ/sG2BVYFKh+XJM3AtCAWFPf7QC1XfbmbT/Sb6A1Oq P5iA== X-Gm-Message-State: AOJu0YzYRzNyBunwqIvFDii4wEQmksZXIyk89zGq4ke7x1tr7gzoRxjd n5bIkZtMuFKahnIpiVIb5CPQsz2rBrkPuX54AsWWtkEeLbUfxsz7BFl3 X-Gm-Gg: ASbGncs3Spe3HFNI253unMX/OCTpXf4li4RxP9qO77cStqLVTfpD843S3Qvn4A3LVzb 1S35Q8y/WLpnFtMHy7Dmrw0xXtbkFNoclDeGRpKnYR+OAbo4DZGhf/YrZSen4eh9FbmToZqtiD0 ErhL0jrjDJnM4eBk/1U6j8FIO908w9FFeDnkbwPGiuQkKbzep3cwN0zOhnhARBeeLmZHD1c5Kl8 26TnQEDimL0JLp+JV14kvsuq16odnsA0ID/hvaWUbSQYSOAGDPZFgMw1Q+ZvHQH1oRLR/qQfqv0 wAWzZW/lwvWt6xJ23rqhQLXQad+ACxTYU6rNStZd7+r8YQdmpJrKTPXWQyV1fYwzbeInTR6v3Xz ysw4nqR5Buk6W8N8LplAzK6HY8jDbtXAyyl96+0BZDiuPS4IaN7Y6s+CznhDA8DjbLcyEUOONEB rlnCEHTQJBYEMqE71XkPSI2hdbgxptMlTaVtRgcGE7rMkDD0NvyXQLqQ== X-Google-Smtp-Source: AGHT+IGNwVHZG6eQtwltPkgeDUi2dIyGh2VvkiqNs3dYVp85iL+oe1f8oZwXdAoI/FJovvVWmP2TTQ== X-Received: by 2002:a05:6214:d0f:b0:880:278d:d4aa with SMTP id 6a1803df08f44-8845fc3e0c3mr36773686d6.7.1763562736083; Wed, 19 Nov 2025 06:32:16 -0800 (PST) Received: from daniel-desktop3.localnet ([204.48.77.252]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-882863923fcsm134305136d6.25.2025.11.19.06.32.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Nov 2025 06:32:15 -0800 (PST) From: Daniel Tang To: linux-doc@vger.kernel.org, linux-ext4@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Theodore Ts'o , Eric Biggers , Gabriel Krisman Bertazi , "Darrick J. Wong" Subject: [PATCH] Documentation: ext4: Document casefold and encrypt flags Date: Wed, 19 Nov 2025 09:32:13 -0500 Message-ID: <4506189.9SDvczpPoe@daniel-desktop3> 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" Based on ext4(5) and fs/ext4/ext4.h. For INCOMPAT_ENCRYPT, it's possible to create a new filesystem with that flag without creating any encrypted inodes. ext4(5) says it adds "support" but doesn't say whether anything's actually present like COMPAT_RESIZE_INODE does. Signed-off-by: Daniel Tang --- Documentation/filesystems/ext4/inodes.rst | 2 ++ Documentation/filesystems/ext4/super.rst | 4 +++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/Documentation/filesystems/ext4/inodes.rst b/Documentation/file= systems/ext4/inodes.rst index cfc6c1659931..55cd5c380e92 100644 --- a/Documentation/filesystems/ext4/inodes.rst +++ b/Documentation/filesystems/ext4/inodes.rst @@ -297,6 +297,8 @@ The ``i_flags`` field is a combination of these values: - Inode has inline data (EXT4_INLINE_DATA_FL). * - 0x20000000 - Create children with the same project ID (EXT4_PROJINHERIT_FL). + * - 0x40000000 + - Use case-insensitive lookups for directory contents (EXT4_CASEFOLD_= FL). * - 0x80000000 - Reserved for ext4 library (EXT4_RESERVED_FL). * - diff --git a/Documentation/filesystems/ext4/super.rst b/Documentation/files= ystems/ext4/super.rst index 1b240661bfa3..9a59cded9bd7 100644 --- a/Documentation/filesystems/ext4/super.rst +++ b/Documentation/filesystems/ext4/super.rst @@ -671,7 +671,9 @@ following: * - 0x8000 - Data in inode (INCOMPAT_INLINE_DATA). * - 0x10000 - - Encrypted inodes are present on the filesystem. (INCOMPAT_ENCRYPT). + - Encrypted inodes can be present. (INCOMPAT_ENCRYPT). + * - 0x20000 + - Directories can be marked case-insensitive. (INCOMPAT_CASEFOLD). =20 .. _super_rocompat: =20 --=20 2.51.0