From patchwork Wed Sep 4 02:08:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gao Xiang X-Patchwork-Id: 11129129 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1AC7317EF for ; Wed, 4 Sep 2019 02:10:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0528A2339D for ; Wed, 4 Sep 2019 02:10:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727709AbfIDCKT (ORCPT ); Tue, 3 Sep 2019 22:10:19 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:6192 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727381AbfIDCKT (ORCPT ); Tue, 3 Sep 2019 22:10:19 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 7F63A171F2FC74A1B58E; Wed, 4 Sep 2019 10:10:15 +0800 (CST) Received: from architecture4.huawei.com (10.140.130.215) by smtp.huawei.com (10.3.19.211) with Microsoft SMTP Server (TLS) id 14.3.439.0; Wed, 4 Sep 2019 10:10:07 +0800 From: Gao Xiang To: Chao Yu , Greg Kroah-Hartman , Christoph Hellwig , CC: , , Chao Yu , Miao Xie , Gao Xiang Subject: [PATCH v2 03/25] erofs: some macros are much more readable as a function Date: Wed, 4 Sep 2019 10:08:50 +0800 Message-ID: <20190904020912.63925-4-gaoxiang25@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190904020912.63925-1-gaoxiang25@huawei.com> References: <20190901055130.30572-1-hsiangkao@aol.com> <20190904020912.63925-1-gaoxiang25@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.140.130.215] X-CFilter-Loop: Reflected Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org As Christoph suggested [1], these macros are much more readable as a function. [1] https://lore.kernel.org/r/20190829095954.GB20598@infradead.org/ Reported-by: Christoph Hellwig Signed-off-by: Gao Xiang --- fs/erofs/erofs_fs.h | 22 ++++++++++++++-------- fs/erofs/inode.c | 4 ++-- fs/erofs/xattr.c | 2 +- 3 files changed, 17 insertions(+), 11 deletions(-) diff --git a/fs/erofs/erofs_fs.h b/fs/erofs/erofs_fs.h index d1f152a3670a..c1220b0f26e0 100644 --- a/fs/erofs/erofs_fs.h +++ b/fs/erofs/erofs_fs.h @@ -171,16 +171,22 @@ struct erofs_xattr_entry { char e_name[0]; /* attribute name */ } __packed; -#define ondisk_xattr_ibody_size(count) ({\ - u32 __count = le16_to_cpu(count); \ - ((__count) == 0) ? 0 : \ - sizeof(struct erofs_xattr_ibody_header) + \ - sizeof(__u32) * ((__count) - 1); }) +static inline unsigned int erofs_xattr_ibody_size(__le16 i_xattr_icount) +{ + if (!i_xattr_icount) + return 0; + + return sizeof(struct erofs_xattr_ibody_header) + + sizeof(__u32) * (le16_to_cpu(i_xattr_icount) - 1); +} #define EROFS_XATTR_ALIGN(size) round_up(size, sizeof(struct erofs_xattr_entry)) -#define EROFS_XATTR_ENTRY_SIZE(entry) EROFS_XATTR_ALIGN( \ - sizeof(struct erofs_xattr_entry) + \ - (entry)->e_name_len + le16_to_cpu((entry)->e_value_size)) + +static inline unsigned int erofs_xattr_entry_size(struct erofs_xattr_entry *e) +{ + return EROFS_XATTR_ALIGN(sizeof(struct erofs_xattr_entry) + + e->e_name_len + le16_to_cpu(e->e_value_size)); +} /* available compression algorithm types */ enum { diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c index 8a0574530a0a..3fc4f764b387 100644 --- a/fs/erofs/inode.c +++ b/fs/erofs/inode.c @@ -29,7 +29,7 @@ static int read_inode(struct inode *inode, void *data) struct erofs_inode_v2 *v2 = data; vi->inode_isize = sizeof(struct erofs_inode_v2); - vi->xattr_isize = ondisk_xattr_ibody_size(v2->i_xattr_icount); + vi->xattr_isize = erofs_xattr_ibody_size(v2->i_xattr_icount); inode->i_mode = le16_to_cpu(v2->i_mode); if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || @@ -62,7 +62,7 @@ static int read_inode(struct inode *inode, void *data) struct erofs_sb_info *sbi = EROFS_SB(inode->i_sb); vi->inode_isize = sizeof(struct erofs_inode_v1); - vi->xattr_isize = ondisk_xattr_ibody_size(v1->i_xattr_icount); + vi->xattr_isize = erofs_xattr_ibody_size(v1->i_xattr_icount); inode->i_mode = le16_to_cpu(v1->i_mode); if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c index d80f61dde72f..620cbc15f4d0 100644 --- a/fs/erofs/xattr.c +++ b/fs/erofs/xattr.c @@ -231,7 +231,7 @@ static int xattr_foreach(struct xattr_iter *it, */ entry = *(struct erofs_xattr_entry *)(it->kaddr + it->ofs); if (tlimit) { - unsigned int entry_sz = EROFS_XATTR_ENTRY_SIZE(&entry); + unsigned int entry_sz = erofs_xattr_entry_size(&entry); /* xattr on-disk corruption: xattr entry beyond xattr_isize */ if (*tlimit < entry_sz) {