From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 10545C636D6 for ; Thu, 16 Feb 2023 09:48:00 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4PHVVk1bVqz3cjb for ; Thu, 16 Feb 2023 20:47:58 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.alibaba.com (client-ip=115.124.30.131; helo=out30-131.freemail.mail.aliyun.com; envelope-from=jefflexu@linux.alibaba.com; receiver=) Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4PHVVc6vnjz3cBp for ; Thu, 16 Feb 2023 20:47:51 +1100 (AEDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R371e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045170;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=5;SR=0;TI=SMTPD_---0Vbo.2zn_1676540866; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0Vbo.2zn_1676540866) by smtp.aliyun-inc.com; Thu, 16 Feb 2023 17:47:47 +0800 From: Jingbo Xu To: xiang@kernel.or, chao@kernel.org, huyue2@coolpad.com, linux-erofs@lists.ozlabs.org Subject: [PATCH 2/2] erofs: set block size to the on-disk block size Date: Thu, 16 Feb 2023 17:47:45 +0800 Message-Id: <20230216094745.47868-2-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20230216094745.47868-1-jefflexu@linux.alibaba.com> References: <20230216094745.47868-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linux-erofs@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development of Linux EROFS file system List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org Errors-To: linux-erofs-bounces+linux-erofs=archiver.kernel.org@lists.ozlabs.org Sender: "Linux-erofs" Set the block size to that specified in on-disk superblock. Also remove the hard constraint of PAGE_SIZE block size for the uncompressed device backend. This constraint is temporarily remained for compressed device and fscache backend, as there is more work needed to handle the condition where the block size is not equal to PAGE_SIZE. It is worth noting that the on-disk block size is read prior to erofs_superblock_csum_verify(), as the read block size is needed in the latter. Signed-off-by: Jingbo Xu --- fs/erofs/erofs_fs.h | 2 +- fs/erofs/inode.c | 3 ++- fs/erofs/internal.h | 8 -------- fs/erofs/super.c | 42 +++++++++++++++++++++++++++--------------- 4 files changed, 30 insertions(+), 25 deletions(-) diff --git a/fs/erofs/erofs_fs.h b/fs/erofs/erofs_fs.h index dbcd24371002..5c7647d68c07 100644 --- a/fs/erofs/erofs_fs.h +++ b/fs/erofs/erofs_fs.h @@ -53,7 +53,7 @@ struct erofs_super_block { __le32 magic; /* file system magic number */ __le32 checksum; /* crc32c(super_block) */ __le32 feature_compat; - __u8 blkszbits; /* support block_size == PAGE_SIZE only */ + __u8 blkszbits; /* filesystem block size */ __u8 sb_extslots; /* superblock size = 128 + sb_extslots * 16 */ __le16 root_nid; /* nid of root directory */ diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c index 90bcc5bd758e..20affdd766f8 100644 --- a/fs/erofs/inode.c +++ b/fs/erofs/inode.c @@ -291,7 +291,8 @@ static int erofs_fill_inode(struct inode *inode) } if (erofs_inode_is_data_compressed(vi->datalayout)) { - if (!erofs_is_fscache_mode(inode->i_sb)) + if (!erofs_is_fscache_mode(inode->i_sb) && + inode->i_sb->s_blocksize_bits == PAGE_SHIFT) err = z_erofs_fill_inode(inode); else err = -EOPNOTSUPP; diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h index 8a85e7af5c92..a4986b91d46d 100644 --- a/fs/erofs/internal.h +++ b/fs/erofs/internal.h @@ -240,14 +240,6 @@ static inline int erofs_wait_on_workgroup_freezed(struct erofs_workgroup *grp) VAL != EROFS_LOCKED_MAGIC); } -/* we strictly follow PAGE_SIZE and no buffer head yet */ -#define LOG_BLOCK_SIZE PAGE_SHIFT -#define EROFS_BLKSIZ (1 << LOG_BLOCK_SIZE) - -#if (EROFS_BLKSIZ % 4096 || !EROFS_BLKSIZ) -#error erofs cannot be used in this platform -#endif - enum erofs_kmap_type { EROFS_NO_KMAP, /* don't map the buffer */ EROFS_KMAP, /* use kmap_local_page() to map the buffer */ diff --git a/fs/erofs/super.c b/fs/erofs/super.c index cd5a537969e0..c54d02466f2a 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -350,6 +350,14 @@ static int erofs_read_superblock(struct super_block *sb) goto out; } + blkszbits = dsb->blkszbits; + sbi->blkszbits = dsb->blkszbits; + if (blkszbits < 9 || blkszbits > PAGE_SHIFT) { + erofs_err(sb, "blkszbits %u isn't supported on this platform", + blkszbits); + goto out; + } + sbi->feature_compat = le32_to_cpu(dsb->feature_compat); if (erofs_sb_has_sb_chksum(sbi)) { ret = erofs_superblock_csum_verify(sb, data); @@ -358,19 +366,11 @@ static int erofs_read_superblock(struct super_block *sb) } ret = -EINVAL; - blkszbits = dsb->blkszbits; - /* 9(512 bytes) + LOG_SECTORS_PER_BLOCK == LOG_BLOCK_SIZE */ - if (blkszbits != LOG_BLOCK_SIZE) { - erofs_err(sb, "blkszbits %u isn't supported on this platform", - blkszbits); - goto out; - } - if (!check_layout_compatibility(sb, dsb)) goto out; sbi->sb_size = 128 + dsb->sb_extslots * EROFS_SB_EXTSLOT_SIZE; - if (sbi->sb_size > EROFS_BLKSIZ) { + if (sbi->sb_size > PAGE_SIZE - EROFS_SUPER_OFFSET) { erofs_err(sb, "invalid sb_extslots %u (more than a fs block)", sbi->sb_size); goto out; @@ -737,8 +737,8 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) sbi->blkszbits = PAGE_SHIFT; if (erofs_is_fscache_mode(sb)) { - sb->s_blocksize = EROFS_BLKSIZ; - sb->s_blocksize_bits = LOG_BLOCK_SIZE; + sb->s_blocksize = PAGE_SIZE; + sb->s_blocksize_bits = PAGE_SHIFT; err = erofs_fscache_register_fs(sb); if (err) @@ -748,8 +748,8 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) if (err) return err; } else { - if (!sb_set_blocksize(sb, EROFS_BLKSIZ)) { - erofs_err(sb, "failed to set erofs blksize"); + if (!sb_set_blocksize(sb, PAGE_SIZE)) { + errorfc(fc, "failed to set initial blksize"); return -EINVAL; } @@ -762,12 +762,24 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) if (err) return err; - if (test_opt(&sbi->opt, DAX_ALWAYS)) { - BUILD_BUG_ON(EROFS_BLKSIZ != PAGE_SIZE); + if (sb->s_blocksize_bits != sbi->blkszbits) { + if (erofs_is_fscache_mode(sb)) { + errorfc(fc, "unsupported blksize for fscache mode"); + return -EINVAL; + } + if (!sb_set_blocksize(sb, 1 << sbi->blkszbits)) { + errorfc(fc, "failed to set erofs blksize"); + return -EINVAL; + } + } + if (test_opt(&sbi->opt, DAX_ALWAYS)) { if (!sbi->dax_dev) { errorfc(fc, "DAX unsupported by block device. Turning off DAX."); clear_opt(&sbi->opt, DAX_ALWAYS); + } else if (sbi->blkszbits != PAGE_SHIFT) { + errorfc(fc, "unsupported blocksize for DAX"); + clear_opt(&sbi->opt, DAX_ALWAYS); } } -- 2.19.1.6.gb485710b