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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C28F6C6FD1D for ; Thu, 30 Mar 2023 08:29:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230462AbjC3I3Z (ORCPT ); Thu, 30 Mar 2023 04:29:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230412AbjC3I3T (ORCPT ); Thu, 30 Mar 2023 04:29:19 -0400 Received: from out30-100.freemail.mail.aliyun.com (out30-100.freemail.mail.aliyun.com [115.124.30.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C35375B92 for ; Thu, 30 Mar 2023 01:29:17 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R141e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046051;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=5;SR=0;TI=SMTPD_---0Vezs-DU_1680164954; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0Vezs-DU_1680164954) by smtp.aliyun-inc.com; Thu, 30 Mar 2023 16:29:15 +0800 From: Jingbo Xu To: xiang@kernel.org, chao@kernel.org, huyue2@coolpad.com, linux-erofs@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH v2 4/8] erofs: introduce erofs_xattr_iter_fixup_aligned() helper Date: Thu, 30 Mar 2023 16:29:06 +0800 Message-Id: <20230330082910.125374-5-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20230330082910.125374-1-jefflexu@linux.alibaba.com> References: <20230330082910.125374-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce erofs_xattr_iter_fixup_aligned() helper where it.ofs <= EROFS_BLKSIZ is mandatory. Signed-off-by: Jingbo Xu --- fs/erofs/xattr.c | 76 ++++++++++++++++++++---------------------------- 1 file changed, 32 insertions(+), 44 deletions(-) diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c index d76b74ece2e5..f77d938613cc 100644 --- a/fs/erofs/xattr.c +++ b/fs/erofs/xattr.c @@ -29,6 +29,25 @@ struct xattr_iter { unsigned int ofs; }; +static inline int erofs_xattr_iter_fixup(struct xattr_iter *it) +{ + if (it->ofs < it->sb->s_blocksize) + return 0; + + it->blkaddr += erofs_blknr(it->sb, it->ofs); + it->kaddr = erofs_read_metabuf(&it->buf, it->sb, it->blkaddr, EROFS_KMAP); + if (IS_ERR(it->kaddr)) + return PTR_ERR(it->kaddr); + it->ofs = erofs_blkoff(it->sb, it->ofs); + return 0; +} + +static inline int erofs_xattr_iter_fixup_aligned(struct xattr_iter *it) +{ + DBG_BUGON(it->ofs > it->sb->s_blocksize); + return erofs_xattr_iter_fixup(it); +} + static int erofs_init_inode_xattrs(struct inode *inode) { struct erofs_inode *const vi = EROFS_I(inode); @@ -80,6 +99,7 @@ static int erofs_init_inode_xattrs(struct inode *inode) goto out_unlock; } + it.sb = sb; it.buf = __EROFS_BUF_INITIALIZER; it.blkaddr = erofs_blknr(sb, erofs_iloc(inode) + vi->inode_isize); it.ofs = erofs_blkoff(sb, erofs_iloc(inode) + vi->inode_isize); @@ -105,19 +125,11 @@ static int erofs_init_inode_xattrs(struct inode *inode) it.ofs += sizeof(struct erofs_xattr_ibody_header); for (i = 0; i < vi->xattr_shared_count; ++i) { - if (it.ofs >= sb->s_blocksize) { - /* cannot be unaligned */ - DBG_BUGON(it.ofs != sb->s_blocksize); - - it.kaddr = erofs_read_metabuf(&it.buf, sb, ++it.blkaddr, - EROFS_KMAP); - if (IS_ERR(it.kaddr)) { - kfree(vi->xattr_shared_xattrs); - vi->xattr_shared_xattrs = NULL; - ret = PTR_ERR(it.kaddr); - goto out_unlock; - } - it.ofs = 0; + ret = erofs_xattr_iter_fixup_aligned(&it); + if (ret) { + kfree(vi->xattr_shared_xattrs); + vi->xattr_shared_xattrs = NULL; + goto out_unlock; } vi->xattr_shared_xattrs[i] = le32_to_cpu(*(__le32 *)(it.kaddr + it.ofs)); @@ -150,20 +162,6 @@ struct xattr_iter_handlers { unsigned int len); }; -static inline int xattr_iter_fixup(struct xattr_iter *it) -{ - if (it->ofs < it->sb->s_blocksize) - return 0; - - it->blkaddr += erofs_blknr(it->sb, it->ofs); - it->kaddr = erofs_read_metabuf(&it->buf, it->sb, it->blkaddr, - EROFS_KMAP); - if (IS_ERR(it->kaddr)) - return PTR_ERR(it->kaddr); - it->ofs = erofs_blkoff(it->sb, it->ofs); - return 0; -} - static int inline_xattr_iter_begin(struct xattr_iter *it, struct inode *inode) { @@ -201,7 +199,7 @@ static int xattr_foreach(struct xattr_iter *it, int err; /* 0. fixup blkaddr, ofs, ipage */ - err = xattr_iter_fixup(it); + err = erofs_xattr_iter_fixup(it); if (err) return err; @@ -236,14 +234,9 @@ static int xattr_foreach(struct xattr_iter *it, processed = 0; while (processed < entry.e_name_len) { - if (it->ofs >= it->sb->s_blocksize) { - DBG_BUGON(it->ofs > it->sb->s_blocksize); - - err = xattr_iter_fixup(it); - if (err) - goto out; - it->ofs = 0; - } + err = erofs_xattr_iter_fixup_aligned(it); + if (err) + goto out; slice = min_t(unsigned int, it->sb->s_blocksize - it->ofs, entry.e_name_len - processed); @@ -271,14 +264,9 @@ static int xattr_foreach(struct xattr_iter *it, } while (processed < value_sz) { - if (it->ofs >= it->sb->s_blocksize) { - DBG_BUGON(it->ofs > it->sb->s_blocksize); - - err = xattr_iter_fixup(it); - if (err) - goto out; - it->ofs = 0; - } + err = erofs_xattr_iter_fixup_aligned(it); + if (err) + goto out; slice = min_t(unsigned int, it->sb->s_blocksize - it->ofs, value_sz - processed); -- 2.19.1.6.gb485710b