From patchwork Sun Nov 3 22:31:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 840732 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 167771B3934; Sun, 3 Nov 2024 22:32:32 +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=1730673153; cv=none; b=Eoj0aZWs5+STa4yXHw1PHpAjr4pc8YdJJyO2XzBj3IT1359Ykbp8mYuaeCz5OsN1AumhGFm5aWTbFFLymQQY3OXvVP4A1lUmdTDb7+l0tfSUO7AuP9e6ZbYbJ3DKNVuYWcWPj5ieBmae43Atb3aXv4vC0d7J/YFQh5wrrAHR2LM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730673153; c=relaxed/simple; bh=ltl2dzTFUaa7H2aG4AJgeKEj/9DuYykUjD6SD30TiWA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=U/rgPxN5zpcYubMDFtYoGG12+m6i/lrdqlTJYkQqcvuLyBQGruTSlZ9Pkz3pUl4KKJDapaDibo/OBpmmN8alvVyCl8B4EjIitVZ+9JnK7XzF8Nn3i+RSgy8LjSnaMSlKqmqo5LwjK9250FlKfX4eZgLegdOJgE1+bqLUlX5PXtU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rD284UMd; 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="rD284UMd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0AD84C4CED4; Sun, 3 Nov 2024 22:32:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730673152; bh=ltl2dzTFUaa7H2aG4AJgeKEj/9DuYykUjD6SD30TiWA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rD284UMdniBNvOArttrl83MnmXpyNh/nlcC9K5Mm8gjSj26HUT3Ffziql0jIddtV1 xYPXQVBEULCOjAKWHI6hxZEby09LiQAqmJQOZ+2SeubZyJt2ePAgcqq22PnnkBfdLl iGO7KlATTICQP9q0iuNiW/jY9amA+V+pVQXLwF5M9Px9C/dR3p1nksEL0y3UncKxCw MWnsyaP5fCmbPQQeasYezXe0FndmKpf/9Xjv4kNUqGvlEda1E0lLqwdglMDaXbGiMz MBBh+epoSvd6NFLssQi/HYX1EI7ZgicEprfte/z93BzVdbXPatTcmXXYI1TbltQc5u 2Gb3LHgTHi+YA== From: Eric Biggers To: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org, x86@kernel.org, Ard Biesheuvel Subject: [PATCH v3 15/18] ext4: switch to using the crc32c library Date: Sun, 3 Nov 2024 14:31:51 -0800 Message-ID: <20241103223154.136127-16-ebiggers@kernel.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241103223154.136127-1-ebiggers@kernel.org> References: <20241103223154.136127-1-ebiggers@kernel.org> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Eric Biggers Now that the crc32c() library function directly takes advantage of architecture-specific optimizations, it is unnecessary to go through the crypto API. Just use crc32c(). This is much simpler, and it improves performance due to eliminating the crypto API overhead. Reviewed-by: Ard Biesheuvel Signed-off-by: Eric Biggers Reviewed-by: Darrick J. Wong Acked-by: Theodore Ts'o --- fs/ext4/Kconfig | 3 +-- fs/ext4/ext4.h | 25 +++---------------------- fs/ext4/super.c | 15 --------------- 3 files changed, 4 insertions(+), 39 deletions(-) diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig index e20d59221fc0..c9ca41d91a6c 100644 --- a/fs/ext4/Kconfig +++ b/fs/ext4/Kconfig @@ -29,12 +29,11 @@ config EXT3_FS_SECURITY config EXT4_FS tristate "The Extended 4 (ext4) filesystem" select BUFFER_HEAD select JBD2 select CRC16 - select CRYPTO - select CRYPTO_CRC32C + select CRC32 select FS_IOMAP select FS_ENCRYPTION_ALGS if FS_ENCRYPTION help This is the next generation of the ext3 filesystem. diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 44b0d418143c..99aa512a7de1 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -31,11 +31,11 @@ #include #include #include #include #include -#include +#include #include #include #include #ifdef __KERNEL__ #include @@ -1660,13 +1660,10 @@ struct ext4_sb_info { struct task_struct *s_mmp_tsk; /* record the last minlen when FITRIM is called. */ unsigned long s_last_trim_minblks; - /* Reference to checksum algorithm driver via cryptoapi */ - struct crypto_shash *s_chksum_driver; - /* Precomputed FS UUID checksum for seeding other checksums */ __u32 s_csum_seed; /* Reclaim extents from extent status tree */ struct shrinker *s_es_shrinker; @@ -2465,23 +2462,11 @@ static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize) #define DX_HASH_LAST DX_HASH_SIPHASH static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc, const void *address, unsigned int length) { - struct { - struct shash_desc shash; - char ctx[4]; - } desc; - - BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx)); - - desc.shash.tfm = sbi->s_chksum_driver; - *(u32 *)desc.ctx = crc; - - BUG_ON(crypto_shash_update(&desc.shash, address, length)); - - return *(u32 *)desc.ctx; + return crc32c(crc, address, length); } #ifdef __KERNEL__ /* hash info structure used by the directory hash */ @@ -3278,15 +3263,11 @@ extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, extern int ext4_register_li_request(struct super_block *sb, ext4_group_t first_not_zeroed); static inline int ext4_has_metadata_csum(struct super_block *sb) { - WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) && - !EXT4_SB(sb)->s_chksum_driver); - - return ext4_has_feature_metadata_csum(sb) && - (EXT4_SB(sb)->s_chksum_driver != NULL); + return ext4_has_feature_metadata_csum(sb); } static inline int ext4_has_group_desc_csum(struct super_block *sb) { return ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 16a4ce704460..1a821093cc0d 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1371,12 +1371,10 @@ static void ext4_put_super(struct super_block *sb) * Now that we are completely done shutting down the * superblock, we need to actually destroy the kobject. */ kobject_put(&sbi->s_kobj); wait_for_completion(&sbi->s_kobj_unregister); - if (sbi->s_chksum_driver) - crypto_free_shash(sbi->s_chksum_driver); kfree(sbi->s_blockgroup_lock); fs_put_dax(sbi->s_daxdev, NULL); fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); #if IS_ENABLED(CONFIG_UNICODE) utf8_unload(sb->s_encoding); @@ -4586,19 +4584,10 @@ static int ext4_init_metadata_csum(struct super_block *sb, struct ext4_super_blo return -EINVAL; } ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, ext4_orphan_file_block_trigger); - /* Load the checksum driver */ - sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); - if (IS_ERR(sbi->s_chksum_driver)) { - int ret = PTR_ERR(sbi->s_chksum_driver); - ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); - sbi->s_chksum_driver = NULL; - return ret; - } - /* Check superblock checksum */ if (!ext4_superblock_csum_verify(sb, es)) { ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " "invalid superblock checksum. Run e2fsck?"); return -EFSBADCRC; @@ -5638,13 +5627,10 @@ failed_mount8: __maybe_unused flush_work(&sbi->s_sb_upd_work); ext4_stop_mmpd(sbi); del_timer_sync(&sbi->s_err_report); ext4_group_desc_free(sbi); failed_mount: - if (sbi->s_chksum_driver) - crypto_free_shash(sbi->s_chksum_driver); - #if IS_ENABLED(CONFIG_UNICODE) utf8_unload(sb->s_encoding); #endif #ifdef CONFIG_QUOTA @@ -7433,8 +7419,7 @@ static void __exit ext4_exit_fs(void) } MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); MODULE_DESCRIPTION("Fourth Extended Filesystem"); MODULE_LICENSE("GPL"); -MODULE_SOFTDEP("pre: crc32c"); module_init(ext4_init_fs) module_exit(ext4_exit_fs)