From nobody Sat Feb 7 15:40:09 2026 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 55DB170805 for ; Mon, 3 Mar 2025 03:46:20 +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=1740973581; cv=none; b=ELh2gIfT3fK/Xl5txz68mNYKIzW0Jc1zllGxDhI1yIpbX4Io3DVqjHq9nrcVj/aW0nJR8/X7BLKprEae6k96upLku8TDZqqPq4dFeY6dcEZy48cgu6PjJYTg4ykzG6nIfHNm7Y4Ktb5n7bIhk3YlofHHUkOyqhA2jKAeoQ9/gcs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740973581; c=relaxed/simple; bh=LIa3c5jErC+Fa9BEa/bZPI0QfpHqsWVhgevulq+HzFo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=P5MH+IP/eUrPyVXWggUi/C1FKLtNKKExO5QJj06UOh/GBJrGJ19acTNpEorGL/fEvEmSr2ukrAp0MJRDSs+OGS2/x1c2RrfWY+c8DLANCtcVjgkc6yqXa3buxwSm09/L3FyalE2MKd5v+0MOjoU29re/vGAW8N/PntEzvpQEHT4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LIcMW/5F; 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="LIcMW/5F" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BF3A4C4CEE6; Mon, 3 Mar 2025 03:46:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1740973580; bh=LIa3c5jErC+Fa9BEa/bZPI0QfpHqsWVhgevulq+HzFo=; h=From:To:Cc:Subject:Date:From; b=LIcMW/5FVny7KJOkpdM4Ug/xO6v/wn0jO2LGfrNR8V6wusL6G5mzdoEdA/wW1gWNU 3hs3Hq4XRzFKTuviescIVJEayvB9UV87shgMQnsXSIieTDBsC6kOihN6W3G0U/5O1V DBFJorNfwTHk3liD/qGDTILgjJyQsQY/q6EVA/+8jdftsbL84pK6X49O4h9pv7GtjB 7y4ZxHbBQFcgDcp68aWM2ONuUvHwYUto9ctTUPD2Pibi6PgAti3RDBIpbJ6GUSahT+ 20iNMnYzx9aT6Q/aZMCwm2fq3DKddvaFRt8KB3hbYThiZMJb2m7zK4jfiM9zIpx/sh NgotyexoQODng== From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH] f2fs: support F2FS_NOLINEAR_LOOKUP_FL Date: Mon, 3 Mar 2025 11:46:06 +0800 Message-ID: <20250303034606.1355224-1-chao@kernel.org> X-Mailer: git-send-email 2.48.1.711.g2feabab25a-goog 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" This patch introduces a new flag F2FS_NOLINEAR_LOOKUP_FL, so that we can tag casefolded directory w/ it to disable linear lookup functionality, it can be used for QA. Signed-off-by: Chao Yu --- fs/f2fs/dir.c | 3 ++- fs/f2fs/f2fs.h | 2 ++ fs/f2fs/file.c | 36 +++++++++++++++++++++++------------- include/uapi/linux/f2fs.h | 5 +++++ 4 files changed, 32 insertions(+), 14 deletions(-) diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index 54dd52de7269..4c74f29a2c73 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -366,7 +366,8 @@ struct f2fs_dir_entry *__f2fs_find_entry(struct inode *= dir, =20 out: #if IS_ENABLED(CONFIG_UNICODE) - if (IS_CASEFOLDED(dir) && !de && use_hash) { + if (IS_CASEFOLDED(dir) && !de && use_hash && + !IS_NOLINEAR_LOOKUP(dir)) { use_hash =3D false; goto start_find_entry; } diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 05879c6dc4d6..787f1e5a52d7 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -3047,6 +3047,7 @@ static inline void f2fs_change_bit(unsigned int nr, c= har *addr) #define F2FS_NOCOMP_FL 0x00000400 /* Don't compress */ #define F2FS_INDEX_FL 0x00001000 /* hash-indexed directory */ #define F2FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories onl= y) */ +#define F2FS_NOLINEAR_LOOKUP_FL 0x08000000 /* do not use linear lookup */ #define F2FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ #define F2FS_CASEFOLD_FL 0x40000000 /* Casefolded file */ #define F2FS_DEVICE_ALIAS_FL 0x80000000 /* File for aliasing a device */ @@ -3066,6 +3067,7 @@ static inline void f2fs_change_bit(unsigned int nr, c= har *addr) #define F2FS_OTHER_FLMASK (F2FS_NODUMP_FL | F2FS_NOATIME_FL) =20 #define IS_DEVICE_ALIASING(inode) (F2FS_I(inode)->i_flags & F2FS_DEVICE_AL= IAS_FL) +#define IS_NOLINEAR_LOOKUP(inode) (F2FS_I(inode)->i_flags & F2FS_NOLINEAR_= LOOKUP_FL) =20 static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) { diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 014cb7660a9a..1acddc4d11e4 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -2062,6 +2062,11 @@ static int f2fs_setflags_common(struct inode *inode,= u32 iflags, u32 mask) } } =20 + if ((iflags ^ masked_flags) & F2FS_NOLINEAR_LOOKUP_FLAG) { + if (!S_ISDIR(inode->i_mode) || !IS_CASEFOLDED(inode)) + return -EINVAL; + } + fi->i_flags =3D iflags | (fi->i_flags & ~mask); f2fs_bug_on(F2FS_I_SB(inode), (fi->i_flags & F2FS_COMPR_FL) && (fi->i_flags & F2FS_NOCOMP_FL)); @@ -2093,17 +2098,18 @@ static const struct { u32 iflag; u32 fsflag; } f2fs_fsflags_map[] =3D { - { F2FS_COMPR_FL, FS_COMPR_FL }, - { F2FS_SYNC_FL, FS_SYNC_FL }, - { F2FS_IMMUTABLE_FL, FS_IMMUTABLE_FL }, - { F2FS_APPEND_FL, FS_APPEND_FL }, - { F2FS_NODUMP_FL, FS_NODUMP_FL }, - { F2FS_NOATIME_FL, FS_NOATIME_FL }, - { F2FS_NOCOMP_FL, FS_NOCOMP_FL }, - { F2FS_INDEX_FL, FS_INDEX_FL }, - { F2FS_DIRSYNC_FL, FS_DIRSYNC_FL }, - { F2FS_PROJINHERIT_FL, FS_PROJINHERIT_FL }, - { F2FS_CASEFOLD_FL, FS_CASEFOLD_FL }, + { F2FS_COMPR_FL, FS_COMPR_FL }, + { F2FS_SYNC_FL, FS_SYNC_FL }, + { F2FS_IMMUTABLE_FL, FS_IMMUTABLE_FL }, + { F2FS_APPEND_FL, FS_APPEND_FL }, + { F2FS_NODUMP_FL, FS_NODUMP_FL }, + { F2FS_NOATIME_FL, FS_NOATIME_FL }, + { F2FS_NOCOMP_FL, FS_NOCOMP_FL }, + { F2FS_INDEX_FL, FS_INDEX_FL }, + { F2FS_DIRSYNC_FL, FS_DIRSYNC_FL }, + { F2FS_PROJINHERIT_FL, FS_PROJINHERIT_FL }, + { F2FS_CASEFOLD_FL, FS_CASEFOLD_FL }, + { F2FS_NOLINEAR_LOOKUP_FL, F2FS_NOLINEAR_LOOKUP_FL }, }; =20 #define F2FS_GETTABLE_FS_FL ( \ @@ -2121,7 +2127,8 @@ static const struct { FS_INLINE_DATA_FL | \ FS_NOCOW_FL | \ FS_VERITY_FL | \ - FS_CASEFOLD_FL) + FS_CASEFOLD_FL | \ + F2FS_NOLINEAR_LOOKUP_FL) =20 #define F2FS_SETTABLE_FS_FL ( \ FS_COMPR_FL | \ @@ -2133,7 +2140,8 @@ static const struct { FS_NOCOMP_FL | \ FS_DIRSYNC_FL | \ FS_PROJINHERIT_FL | \ - FS_CASEFOLD_FL) + FS_CASEFOLD_FL | \ + F2FS_NOLINEAR_LOOKUP_FL) =20 /* Convert f2fs on-disk i_flags to FS_IOC_{GET,SET}FLAGS flags */ static inline u32 f2fs_iflags_to_fsflags(u32 iflags) @@ -3344,6 +3352,8 @@ int f2fs_fileattr_get(struct dentry *dentry, struct f= ileattr *fa) fsflags |=3D FS_INLINE_DATA_FL; if (is_inode_flag_set(inode, FI_PIN_FILE)) fsflags |=3D FS_NOCOW_FL; + if (IS_NOLINEAR_LOOKUP(inode)) + fsflags |=3D F2FS_NOLINEAR_LOOKUP_FL; =20 fileattr_fill_flags(fa, fsflags & F2FS_GETTABLE_FS_FL); =20 diff --git a/include/uapi/linux/f2fs.h b/include/uapi/linux/f2fs.h index 795e26258355..a03626fdcf35 100644 --- a/include/uapi/linux/f2fs.h +++ b/include/uapi/linux/f2fs.h @@ -104,4 +104,9 @@ struct f2fs_comp_option { __u8 log_cluster_size; }; =20 +/* used for FS_IOC_GETFLAGS and FS_IOC_SETFLAGS */ +enum { + F2FS_NOLINEAR_LOOKUP_FLAG =3D 0x08000000, +}; + #endif /* _UAPI_LINUX_F2FS_H */ --=20 2.48.1