From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A52931D6AA for ; Wed, 16 Apr 2025 05:48:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744782491; cv=none; b=M2TNGpFG7uh8a1V/G+L0ixF9AXY+AUU+qruykIZ1u6XjzDuctLuiKrohbjIhLyeAEjOfks0GpR3srlMVtnJWqfGIUwQmIHoli9tc7XDa4wRKzvBU0EBwH1IWJ+IHS8KcAXZUFDMp71oO5jkDB5TFdE37YGt2GBoRLCN7XY+5HDA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744782491; c=relaxed/simple; bh=UCyiDm2TjAms0gkzQqN29nR6SyF2kYY1rrXuh5bVPl4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=NiwWoF2ERr32jymie7tAlEXWZ5x9WIMpzxG1P0B+Sz6uR5ymsBXP0SoNnnA/qawk959BKSnSQmprpQ5cA2NcflGjcbwmRds6wI5mlFXQi9XgvZSxxbnY1K7YvKcU58vyFRQ+JHvPnQzhwxvrnUgcZwMTH6o7ZsxUIrem0n118/I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rb6zamL7; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="rb6zamL7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 11FEBC4CEE2; Wed, 16 Apr 2025 05:48:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744782491; bh=UCyiDm2TjAms0gkzQqN29nR6SyF2kYY1rrXuh5bVPl4=; h=From:To:Cc:Subject:Date:From; b=rb6zamL73hlRkYjswss586a+WyYKWcZA+Al7696J2ed8vVoxj0/81ZZKv7ne4iG8S IMjjKc+voKz7sAHYEkI9fbvXRGSDHtIk/0FGUv1hzYaflh+gjN6sq1iWSFeUOLK+C3 yT9otbXfui49oq5Gi5gFY58kjjp9UM3i8qfCaYyUSDL5hwQqmG6r7PS7SCmBO2ZNJK eiaXm1mgWkKEUCai9Nz9CP7twwvuoqh70XecPNWe5dPKBUnvHlQ73e+NkIKR+4S2n1 piWh1SijtvMPZ4hIveHFp+yZ/WYTw5npdGSj2AAWhOGdqz4uHdJb+/cpFaaA/93lhr fo5I+ZXpXGn+w== From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH 1/2] f2fs: sysfs: add encoding_flags entry Date: Wed, 16 Apr 2025 13:48:04 +0800 Message-ID: <20250416054805.1416834-1-chao@kernel.org> X-Mailer: git-send-email 2.49.0.604.gff1f9ca942-goog Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This patch adds a new sysfs entry /sys/fs/f2fs//encoding_flags, it is a read-only entry to show the value of sb.s_encoding_flags, the value is hexadecimal. =========================== ========== Flag_Name Flag_Value =========================== ========== SB_ENC_STRICT_MODE_FL 0x00000001 SB_ENC_NO_COMPAT_FALLBACK_FL 0x00000002 =========================== ========== case#1 mkfs.f2fs -f -O casefold -C utf8:strict /dev/vda mount /dev/vda /mnt/f2fs cat /sys/fs/f2fs/vda/encoding_flags 1 case#2 mkfs.f2fs -f -O casefold -C utf8 /dev/vda fsck.f2fs --nolinear-lookup=1 /dev/vda mount /dev/vda /mnt/f2fs cat /sys/fs/f2fs/vda/encoding_flags 2 Signed-off-by: Chao Yu --- Documentation/ABI/testing/sysfs-fs-f2fs | 13 +++++++++++++ fs/f2fs/sysfs.c | 9 +++++++++ 2 files changed, 22 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 59adb7dc6f9e..0dbe6813b709 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -846,3 +846,16 @@ Description: For several zoned storage devices, vendors will provide extra space reserved_blocks. However, it is not enough, since this extra space should not be shown to users. So, with this new sysfs node, we can hide the space by substracting reserved_blocks from total bytes. + +What: /sys/fs/f2fs//encoding_flags +Date: April 2025 +Contact: "Chao Yu" +Description: This is a read-only entry to show the value of sb.s_encoding_flags, the + value is hexadecimal. + + =========================== ========== + Flag_Name Flag_Value + =========================== ========== + SB_ENC_STRICT_MODE_FL 0x00000001 + SB_ENC_NO_COMPAT_FALLBACK_FL 0x00000002 + =========================== ========== diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 3a3485622691..cf98c5cbb98a 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -274,6 +274,13 @@ static ssize_t encoding_show(struct f2fs_attr *a, return sysfs_emit(buf, "(none)\n"); } +static ssize_t encoding_flags_show(struct f2fs_attr *a, + struct f2fs_sb_info *sbi, char *buf) +{ + return sysfs_emit(buf, "%x\n", + le16_to_cpu(F2FS_RAW_SUPER(sbi)->s_encoding_flags)); +} + static ssize_t mounted_time_sec_show(struct f2fs_attr *a, struct f2fs_sb_info *sbi, char *buf) { @@ -1158,6 +1165,7 @@ F2FS_GENERAL_RO_ATTR(features); F2FS_GENERAL_RO_ATTR(current_reserved_blocks); F2FS_GENERAL_RO_ATTR(unusable); F2FS_GENERAL_RO_ATTR(encoding); +F2FS_GENERAL_RO_ATTR(encoding_flags); F2FS_GENERAL_RO_ATTR(mounted_time_sec); F2FS_GENERAL_RO_ATTR(main_blkaddr); F2FS_GENERAL_RO_ATTR(pending_discard); @@ -1270,6 +1278,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(reserved_blocks), ATTR_LIST(current_reserved_blocks), ATTR_LIST(encoding), + ATTR_LIST(encoding_flags), ATTR_LIST(mounted_time_sec), #ifdef CONFIG_F2FS_STAT_FS ATTR_LIST(cp_foreground_calls), -- 2.49.0