From nobody Sat Feb 7 11:13:42 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 AE1EF3CF7C; Mon, 12 Feb 2024 16:05:47 +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=1707753947; cv=none; b=Ll8sEDlvBoAd+htlwcFM0wKxvoSwD7HkdUPXSh05as3qpSw4n8gP8iqdqgaO3+t3UQHphwEgbIuaTtHpbN251MdWslZuULx288WaeQRv1cXSyqucqse6dSxQe6HI8i8EVUpekIn3U5kmWJLEft5Ejsu42NGUCiGB4TaDnFC914E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707753947; c=relaxed/simple; bh=PVnetzBOH34x39uT5RM+QQRj/93uXMs1sWHwvNANQ6o=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=gk+sp0NWqrqJxR5Osj3lv0OCnKMo0KNtyeJDgLjM7kqLWtmNusYOoUkv4KxfOhHW4GsRqW1qzW8lscXk4/X+iOlOZ6HuUYv/rHRTRKJ4QP172x9WJw3Nm/Qfy+fH1Y/jZDTKGQ1GvjKeJl1uOkkHPv/KH5u9+I41gQ4WJ63epv0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=H5xdMN8S; 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="H5xdMN8S" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3BBDAC433F1; Mon, 12 Feb 2024 16:05:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707753947; bh=PVnetzBOH34x39uT5RM+QQRj/93uXMs1sWHwvNANQ6o=; h=From:To:Cc:Subject:Date:From; b=H5xdMN8SecoFM2W/G3J7KfIOpJOnULuNUcgoL/oKLg+ZvqYE8eBBWyT7L0b4BgeEA r6Mg4hTrtKolVsF88U6R0kRFAYAFOIp8pZTkobZGOnTBdxWy/yVkCDJC3AoJ9g/Q+E e4hyC3eaXDryq0JjXntd5Tc4YZjfAUQSP6foWOBRcK/8vj96RXPdlaomFK7fimemr8 emUcBjiaJeJgLwJs8dteLhJUMMfqO4QHR02erWvns5fg99wVhGblS77HQGgKCG6Z4+ 5KIeItZ6PxyG5kjQUbwpx7kJx3SDjb3tPCATr93wm7q+0j05rJSnibgGlbnsTZtyT9 VvRpHhLWmYG+g== From: Chao Yu To: stable@vger.kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Sheng Yong , Chao Yu , Jaegeuk Kim Subject: [PATCH 6.1] f2fs: add helper to check compression level Date: Tue, 13 Feb 2024 00:05:30 +0800 Message-Id: <20240212160530.1017205-1-chao@kernel.org> X-Mailer: git-send-email 2.40.1 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" From: Sheng Yong commit c571fbb5b59a3741e48014faa92c2f14bc59fe50 upstream. This patch adds a helper function to check if compression level is valid. Meanwhile, this patch fixes a reported issue [1]: The issue is easily reproducible by: 1. dd if=3D/dev/zero of=3Dtest.img count=3D100 bs=3D1M 2. mkfs.f2fs -f -O compression,extra_attr ./test.img 3. mount -t f2fs -o compress_algorithm=3Dzstd:6,compress_chksum,atgc,gc_mer= ge,lazytime ./test.img /mnt resulting in [ 60.789982] F2FS-fs (loop0): invalid zstd compress level: 6 A bugzilla report has been submitted in https://bugzilla.kernel.org/show_bug.cgi?id=3D218471 [1] https://lore.kernel.org/lkml/ZcWDOjKEnPDxZ0Or@google.com/T/ The root cause is commit 00e120b5e4b5 ("f2fs: assign default compression level") tries to check low boundary of compress level w/ zstd_min_clevel(), however, since commit e0c1b49f5b67 ("lib: zstd: Upgrade to latest upstream zstd version 1.4.10"), zstd supports negative compress level, it cast type for negative value returned from zstd_min_clevel() to unsigned int in below check condition, result in repored issue. if (level < zstd_min_clevel() || ... This patch fixes this issue by casting type for level to int before comparison. Fixes: 00e120b5e4b5 ("f2fs: assign default compression level") Signed-off-by: Sheng Yong Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Chao Yu --- fs/f2fs/compress.c | 27 +++++++++++++++++++++++++++ fs/f2fs/f2fs.h | 2 ++ fs/f2fs/super.c | 4 ++-- 3 files changed, 31 insertions(+), 2 deletions(-) diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index 4cb58e8d699e..4e83cfa1b073 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -55,6 +55,7 @@ struct f2fs_compress_ops { int (*init_decompress_ctx)(struct decompress_io_ctx *dic); void (*destroy_decompress_ctx)(struct decompress_io_ctx *dic); int (*decompress_pages)(struct decompress_io_ctx *dic); + bool (*is_level_valid)(int level); }; =20 static unsigned int offset_in_cluster(struct compress_ctx *cc, pgoff_t ind= ex) @@ -322,11 +323,21 @@ static int lz4_decompress_pages(struct decompress_io_= ctx *dic) return 0; } =20 +static bool lz4_is_level_valid(int lvl) +{ +#ifdef CONFIG_F2FS_FS_LZ4HC + return !lvl || (lvl >=3D LZ4HC_MIN_CLEVEL && lvl <=3D LZ4HC_MAX_CLEVEL); +#else + return lvl =3D=3D 0; +#endif +} + static const struct f2fs_compress_ops f2fs_lz4_ops =3D { .init_compress_ctx =3D lz4_init_compress_ctx, .destroy_compress_ctx =3D lz4_destroy_compress_ctx, .compress_pages =3D lz4_compress_pages, .decompress_pages =3D lz4_decompress_pages, + .is_level_valid =3D lz4_is_level_valid, }; #endif =20 @@ -490,6 +501,11 @@ static int zstd_decompress_pages(struct decompress_io_= ctx *dic) return 0; } =20 +static bool zstd_is_level_valid(int lvl) +{ + return lvl >=3D zstd_min_clevel() && lvl <=3D zstd_max_clevel(); +} + static const struct f2fs_compress_ops f2fs_zstd_ops =3D { .init_compress_ctx =3D zstd_init_compress_ctx, .destroy_compress_ctx =3D zstd_destroy_compress_ctx, @@ -497,6 +513,7 @@ static const struct f2fs_compress_ops f2fs_zstd_ops =3D= { .init_decompress_ctx =3D zstd_init_decompress_ctx, .destroy_decompress_ctx =3D zstd_destroy_decompress_ctx, .decompress_pages =3D zstd_decompress_pages, + .is_level_valid =3D zstd_is_level_valid, }; #endif =20 @@ -555,6 +572,16 @@ bool f2fs_is_compress_backend_ready(struct inode *inod= e) return f2fs_cops[F2FS_I(inode)->i_compress_algorithm]; } =20 +bool f2fs_is_compress_level_valid(int alg, int lvl) +{ + const struct f2fs_compress_ops *cops =3D f2fs_cops[alg]; + + if (cops->is_level_valid) + return cops->is_level_valid(lvl); + + return lvl =3D=3D 0; +} + static mempool_t *compress_page_pool; static int num_compress_pages =3D 512; module_param(num_compress_pages, uint, 0444); diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 5c76ba764b71..e5a9498b89c0 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -4219,6 +4219,7 @@ bool f2fs_compress_write_end(struct inode *inode, voi= d *fsdata, int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock= ); void f2fs_compress_write_end_io(struct bio *bio, struct page *page); bool f2fs_is_compress_backend_ready(struct inode *inode); +bool f2fs_is_compress_level_valid(int alg, int lvl); int f2fs_init_compress_mempool(void); void f2fs_destroy_compress_mempool(void); void f2fs_decompress_cluster(struct decompress_io_ctx *dic, bool in_task); @@ -4283,6 +4284,7 @@ static inline bool f2fs_is_compress_backend_ready(str= uct inode *inode) /* not support compression */ return false; } +static inline bool f2fs_is_compress_level_valid(int alg, int lvl) { return= false; } static inline struct page *f2fs_compress_control_page(struct page *page) { WARN_ON_ONCE(1); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 3805162dcef2..0c0d0671febe 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -628,7 +628,7 @@ static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sb= i, const char *str) if (kstrtouint(str + 1, 10, &level)) return -EINVAL; =20 - if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) { + if (!f2fs_is_compress_level_valid(COMPRESS_LZ4, level)) { f2fs_info(sbi, "invalid lz4hc compress level: %d", level); return -EINVAL; } @@ -666,7 +666,7 @@ static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi= , const char *str) if (kstrtouint(str + 1, 10, &level)) return -EINVAL; =20 - if (level < zstd_min_clevel() || level > zstd_max_clevel()) { + if (!f2fs_is_compress_level_valid(COMPRESS_ZSTD, level)) { f2fs_info(sbi, "invalid zstd compress level: %d", level); return -EINVAL; } --=20 2.40.1